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EK-0TU80-SV-4

March 1984

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Document:	TU80 Pathfinder
Order Number:	EK-0TU80-SV
Revision:	4
Pages:	158
Original Filename:

OCR Text

EK-OTU80-SV-004

TUBD Pathfinder

Prepared by Educational Services
of
Digital Equipment Corporation

RECORD OF REVISIONS
REVISION
A

(2-16-83)
B

(7-29-83)

(10-31-83)

(6 -15 -.84)
..lI

COHMENTS

Manual Released.
code 10'":\

This manual is current with series

This manual is updated to include editorial changes
to
concur
with
series
code
11
affecting
the
following pages:
v, vi, V l l l , ix, 1-7, 1-9, 2-3
thru 2-6, 2-12, 2-15, 2-16, 2-18, 2-21, 2-22, 2-24,
5-3, 5-64, 5-65, A-3.
Manual content is current with series code 12 and 13.
This manual is updated to include editorial changes
affecting pages:
iii/iv, 1-9, 1-11, 2-2, 2-4 thru
2-9,
2-12,
2-15 thru 2-18, 3-2, 3-3, 3-4, 3-8,
5 - 2A / 5 - 2 B, 5 - 6 2, 5 - 6 3, 5 - 6 5, A- 2, A- 3, A- 9 .
Hanual content is current with serial code 14 and
includes ECO's 51188, 51287.
This manual is updated
to include editorial changes affecting pages: 2-25,
3-5, 4-31, 5-16, 5-20, 5-35, 5-55, 5-56, 5-57, B-1.

Pub. No. 49762100 (CPI)
Pub. No. EK-OTU80-TM (DEC)

1st
2nd
3rd
4th

Edition,
Edition,
Edition,
Edition,

March 1983
February 1984
March 1984
July 1984

Copyright a 1984 by Digital Equipment Corporation.
All Rights Reserved.
Printed in U.S.A.
The reproduction of this material, in part or whole, is strictly
prohibited. For copy information, contact the Educational Services
Department, Digital Equipment Corporation, Maynard, Massachusetts
01754.
The information in this document is subject to change without
notice. Digital Equipment Corporation assumes no responsibility
for any errors that may appear in this document.
The following are trademarks of Digital Equipment Corporation,
Maynard, Massachusetts.

momoomo
DEC
DECmate
DECnet
DECUS

DECwriter
DIGITAL
LA
MASSBUS
PDP

P/OS
Professional
Rainbow
RSTS
RSX

iii

UNIBUS
VAX
VMS
VT
Work Processor

PREFACE

This manual contains information for troubleshooting the TUBO
Subsystem Tape Transport.
The maintenance philosophy in this
manual is directed to a "modul'e replacement" concept; i.E~.,
defective Printed Circuit Modules are replaced rather than
repaired.
Persons responsible for maintenance of the TUBO
should be familiar with the basic functions of all modules.
RELATED PUBLICATIONS
TUBO Subsystem Users Guide, EK-OTU80-UG
TU80 Technical Description/Service Manual, EK-OTU80-TM
TUBO Illustrated Parts Manual, EK-OTUBO-IP
TUBO Pocket Service Guide, EK-OTUBO-PS

TABLE OF CONTENTS
PARAGRAPH

TITLE

PAGE

Section 1 - TROUBLESHOOTING
1.1
1.2
1.2.1
1.2.2
1.2.3
1.3

1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.4

GENERAL DESCRIPTION
FIELD SERVICE PROCEDURES
Pre-Site
Corrective Action Matrices
On-Site
DIAGNOSTIC TESTS
Operator Diagnostics
Operator Diagnostic Procedures
Field Service Functional Diagnostics
Field Service Functional Diagnostic
Procedures
Sub-Fault Codes
FAULT CODE TROUBLESHOOTING PROCEDURES

1-1
1-2
1-2

1-2
1-9

1-10
1-10
1-11
1-12
1-12

1-13
1-14

Section 2 - FIELD SERVICE FUNCTIONAL DIAGNOSTIC TEST DESCRIPTIONS
2.1

SCOPE

2-1

Section 3 - TU80 FAULT AND SUB-FAULT DESCRIPTIONS
3.1

TU80 FAULT AND SUB-FAULT DESCRIPTIONS

3-1

LIST OF TABLES
TABLE

TITLE

1-1

MALFUNCTION MATRIX
FAULT CODE MATRIX (OPERATOR TEST 01)
TERMINATION CODES FOLLOWING FAULT CODE 22
TERMINATION CODES FOLLOWING FAULT CODE 24
TERMINATION CODES FOLLOWING FAULT CODE 26
TERMINATION CODES FOLLOWING FAULT
CODE 30, 31 OR 36
TERMINATION CODES FOLLOWING FAULT
CODE 04 OR 06
TERMINATION CODES FOLLOWING FAULT
CODE 26 OR 32

1-2
1-3
1-4
1-5
1-6
1-7
1-8

PAGE

1-3

1-4/1-5
1-6
1-6
1-7
1-7
1-8
1-8

LIST OF FIGURES
FIGURE

TITLE

PAGE

1-1

EXAMPLE OF FAULT CODE TROUBLESHOOTING
PROCEDURE

1-14

Section 1 - TROUBLESHOOTING

GENERAL DESCRIPTION
1.1
This manual contains Field Service Diagnostic Test Procedures,
Fault
Code
Troubleshooting
Procedures,
and
Field
Service
Functional Diagnostic Test Descriptions.
NOTES
1.

The
procedures. contained
in
this
section of the manual are intended for
use
by
qualified
field
service
per son n e l f am iIi a r wit h the 0 per a t ion
of the TU80 Tape Transport.
Under no
circumstances should these procedures
be performed by persons other than
fully
qualified
field
service
personnel.

Th e
0 per ator
d i agnos t ic
procedures
referenced in this section of the
manual are expanded for maintenance
personnel use. Diagnostics for use by
the operator are contained in the
OPERATOR DIAGNOSTICS section of the
TU80 Subsystem User Guide.

The diagnostic tests designed into the transport are an off-line
function initiated through the operator control panel. The host
controller is capable of monitoring transport status through the
Status Transfer command.
A Channel Loopback command is also
provided to exercise the formatter logic of the transport.
The TUBO microprocessor-based control system tests for many
operational fault conditions while operating on-line.
These
conditions are indicated as fault codes, appearing on the
control panel display.
The fault condition is indicated by
i 11 um ina t ion 0 f the RE SET i nd i cat 0 rand the a p pro p ria t e f au 1 t
code being displayed. Faults, which occur while tape is loaded,
may initiate a controlled removal by the microprocessor of servo
and write circuitry power to prevent tape damage.

1-1

1.2
FIELD SERVICE PROCEDURES
Failure analysis procedures by a Field Service Representative
consist of a pre-site determination of the reported problem, and
an on-site procedure to isolate and correct verified faults.
1.2.1
Pre-Site
When the trouble call is received from the site,
Service Representative should proceed as follows:

the

Field

Consult Tables 1-1 and 1-2, Corrective Action Hatrices,
to determine if operator action is required.
Specific
TU80 malfunctions or fault codes indicate the need for
operator action in the form of visual checks, cleaning,
or performing Operator Diagnostic Test HOI.
It should
also be verified that Operator Diagnostic Test #01 has
been performed after the operator corrective actions have
been completed.

After verifying that the fault still occurs following
completion of all operator actions, consult Table I-lor
Table 1-2 for a list of assemblies related to the
reported malfunction or fault code.
As many of these
assemblies, as are available, should be taken to the site
to prevent unnecessary call-backs.

1.2.2
Corrective Action Matrices
The Malfunction and Fault Code Matrices (Tables 1-1 and 1-2)
list all malfunctions or fault codes and possible assemblies
which may cause the fault condition.
The purpose of these
tables IS to provide a list of related assemblies prior to
reporting to the customer site. Assemblies listed under the
individual malfunction or fault codes are arranged in a "most
probable fault" order.
In addition to the assemblies listed,
the tables may direct field service personnel to request the
operator to perform Diagnostic Test #02 or Test #03.
Test #02 is required if Fault Codes 22, 24, 26, 30, 31 or 36
terminate Operator Diagnostic Test HOI.
Tables 1-3 thru 1-6
list possible failing assemblies for fault codes which terminate
Diagnostic Test #02.
Test #03 is required if Fault Codes 04, 06, 22, 25, 26, 30, 31,
32, 33, 35, 36, 48 or 52 terminate Operator Diagnostic Test
#QI.
Tables 1-7 and 1-8 list possible failing assemblies for
fault codes which terminate Diagnostic Test #03.
Also contained on the matrices in Table 1-1 and 1-2 are those
actions (A, B, C) which should be performed by the operator.
These actions should be verified prior to anyon-site call by
field service.

1-2

Table 1-1.

MALFUNCTION MATRIX

FOLLOWING THE DEPRESSION OF

POWER SWITCH

(CIRCUIT BREAKER)

TO THE 'I' POSITION, THE "LOGIC OFF" LED DOES NOT ILLUMINATE.
FOLLOWING THE DEPRESSION OF THE "LOGIC ON" SWITCH,
THE "LOGIC ON" LED DOES NOT ILLUMINATE.
TU80 DISPLAYS 00 ON POWER UP.

MALFUNCTION

TU80 POWERS DOWN WHILE IN USE.
OPERATOR PANEL SWITCH DOES NOT OPERATE.
TU80 OPERATES WITH OPERATOR DOOR OPEN.
FILE PROT. LED DOES NOT ILLUMINATE
WHEN A WRITE PROTECTED TAPE IS
LOADED.
TAKE UP REEL DOES NOT TURN
FREELY.
SUPPLY REEL DOES NOT TURN
FREELY.
CORRECTIVE
ACTION

I
I
I
I
I
I
I

ENSURE TU80 IS PLUGGED
A
INTO A LIVE SUPPLY
ENSURE OPERATION IS
jLEGAL
CHANGE TAPE
READ/WRITE/SERVO
FORMATTER/CONTROL
POWER SUPPLY
POWER AMPLIFIER
OPERATOR PANEL
PNEUMATIC PUMP
PRESSURE REGULATOR
SUPPLY MOTOR/TACH
SUPPLY HUB
TAKE-UP r-lOTOR/TACH
TAKE UP HUB
rrOp COVER SWITCH
~ILE PROTECT SENSOR
ICOOL INC FAN

I
I
I
I
I
I
I
I
I

I'
I
I
I

SUPPLY REEL HUB CANNOT
BE LATCHED.

I
I
I
I
I
I

EXCESSIVE PNEUMATIC
NOISE.

I
I
I

A
A

5
1
3

1
2

1
2
1
2

1
2

4
4

1
2
1
1

1-3

Table 1-2.
FAULT CODE
FAILING ASSEMBLY

Test Successful

O!O

() II ,

..L

0
2

0
4

FAULT CODE MATRIX (OPERATOR TEST #01)

0
5

0
6

0
8

0
7

0
9

1
0

1
1

1
3

2I2
6 7 8 9
~ I~ I i 8 ~1~1~);I~, 4 5,

1
4

Latch Hub Correctly
iI'hread Tape Correctly
Clean Head/Tape Path
and Hub Pads
Change Tape
Close Top Cover

A
A

Read/Write/Servo
Formatter/Control
Power Supply
Power Amplifier
Control Panel
Pneumatic Pump
Filter
Supply Air Bearing
Take-Up Air Bearing
Head (Amplitude Error)
Head (Data Reliability)
Supply Motor/Tach
Supply Hub
Take-Up Motor/Tach
EOT/BOT Sensor
Top Cover Switch
File Protect Sensor
Pressure Regulator
NOTE:

I
:A

I
I

i
X!
i

3, 3

Ii 1
2i 2

11 11

2! 2

21
,

!
i
I

31 3

Xi
Xi

2, 2~ 4
j

, 5

I
i

!
I

I
I

Xl
X
I

I
i

41 1

21 2

I
3

3
i

i
I
I

1
1
3

1
I

Tests 02 and 03 should not be used unless Test 01 directs their use.

I 4

i X

I CI

I
5

i 1
1
4

1
1

I
i

I
1
2! 11 2[
3! 21 Ii
I ! I

i Bt I

1 3

I
I

I
3

2! 21
I

;

A:
I
i

;

I
1

:
i

B
A

Run Test 1102 (See NOTE)
Run Test 1103 (See NOTE)

A A

A A A AI AI A A A
B B B BI Bi B B B

Test 02 will fail if run Stand-alone.

FAULT CODE
FAILING ASSEMBLY

3
0

3
3

3
2

3
4

Table 1-2.

FAULT CODE MATRIX (Cont1d)

3
9

3
6

3
7

3
8

4
0

4
1

4
5

4
6

4
8

9,0

5
1

5
5

6
0

6
1

1
2

1
1

Test Successful
Clean Hub Pads
Thread Tape Correctly
Clean Head/Tape Path
and Hub Pads
Change Tape
Close Top Cover
Run Test 1102 (See NOTE)
Run Test 1103 (See NOTE)

A
B

I
Read/Wri te/Servo
Formatter/Control
Power Supply
Power Amplifier
Control Panel
Pneumatic Pump
Filter
Supply Air Bearing
Take-Up Air Bearing
Head (Amplitude Error)
Head (Data Reliability)
Supply Motor/Tach
Supply Hub
Take-Up Motor/Tach
EOT /BOT Sensor
Top Cover Switch
File Protect Sensor
Pressure Regulator
NOTE:

!
4

5
7
8

4
5
7

5
7
8

!
!

3 i

I
I

I
1
I

3
9

I
!

i
3
9

Tests 02 and 03 should not be used unless Test 01 directs their use.

Test 02 will fail if run Stand-alone.

1.2.2.1
Test #02 Follow-Up - Table 1-3 is referenced if,
after running Operator Diagnostic Test #01,
Fault Code 22
appears on the display.
Referencing Table 1-2, Test #02 is
required if operator actions A, Band C did not resolve the
problem.
If Test #02 is unsuccessful, the fault code displayed
is referenced to this table for probable failing assemblies.
Table 1-3.

TERMINATION CODE
FAILING ASSEMBLY
Ensure Tape is Thd'd
Repeat Test
Read/Write/Servo
Power Amplifier
Pneumatic Pump
Filter
Supply Air Bearing
Take-Up Air Bearing
Supply Motor/Tach
Supply Hub
trake-Up Motoi-/Tach
Pr~ssure Regula tor

TERMINATION CODES FOLLOWING FAULT CODE 22
AND DIAGNOSTIC TEST 02

7
3

A
B
1 1
2

7
5

8
0

8
1

8
3

1
2

8
5

8
7

1
2

A
1.

1
2

--- r - -

1
3

3
4-

:3
4

Table 1-4 is referenced if, after running Operator Diagnostic
Test #01, Fault Code 24 appears on the display.
Referencing
Table 1-2, Test #02 is required.
If Test #02 is unsuccessful,
the fault code displayed is referenced to this table for
probable failing assemblies.
Table 1-4.

TERMINATION CODE
WAILING ASSEMBLY
Ensure Tape is Thd'd
Repeat Test
R-ead/Wri te/Servo
Power Amplifier
Pneumatic Pump
lFi1ter
Supply Air Bearing
~ake Up Air Bearing
Supply Motor/Tach
Supply Hub
~ake-Up Motor/Tach
~re88ure Regulator

TERMINATION CODES FOLLOWING FAULT CODE 24
AND DIAGNOSTIC TEST 02

A
B
1 1
2

7
3

7
5

8
5

8
6

8
7

0
8 f--

1
2

1-6

8
3

A
1
2

Table 1--5 is referenced if, after running Operator Diagnostic
Test #01, Fault Code 26 appears on the display.
Referencing
Table 1-2, Test #02 is required.
If Test #02 is unsuccessful,
the fault code displayed is referenced to this table for
probable failing assemblies.

Table 1-5.

8- .0-

7 ---rr-~r 7 8
0- 1
2 3 4 5--

TERMINATION CODE
FAILING ASSEMBLY

Tape is Thd'd
Repeat TEst
Read/Write/Servo
Power Amplifier
Pneumatic Pump
Filter
Supply Air Bearing
Take-Up Air Bearing
Supply Motor/Tach
Supply Hub
~ake-Up Motor/Tach
Pressure Regulator

A
B

~nsure

TERMINATION CODES FOLLOWING FAULT CODE 26
AND DIAGNOSTIC TEST 02
8
2

8
3

8
5

8
6

8
7

8
9

9
0

9
1

9 9
2

9
8

,--

8
4

'- -1

3
1

-1

A
1

2
2

Table 1-6 is referenced if, after running Operator Diagnostic
Test #01, Fault Code 30, 31 or 36 appears on the display.
Referencing Table 1-2, Test #02 is required if operator action
"A" did not resolve the problem.
If Test #02 is unsuccessful,
the fault code displayed is referenced to this table for
probable failing assemblies.
Table 1-6.

TERMINATION CODES FOLLOWING FAULT CODES 30, 31 OR 36
AND DIAGNOSTIC TEST 02

TERMINATION CODE
WAILING ASSEMBLY
Ensure ~e is Thd' d
Repeat Test
Read/Write/Servo
Power Amplifier
Pneumatic Pump
Filter
Supply Air Bearing
~ake-U£ Air Bearing
Supply Motor/Tach
Supply Hub
Take-Up Motor/Tach
Pressure Regulator

7
4

7
5

8
0

3
1

8
2

8
7

3
1

8
9

9
0

9 ~ 9
2

9
7

9
8

3
1

A
B

0
0

3
2

2
1

1-7

1.2.2.2
Test #03 Follow-Up
Table 1-7 is referenced if,
after executing Operator Diagnostic Test #01, Fault Code 04 or
06 appears on the display.
Referencing Table 1-2, Test #03 is
required if operator actions A or B did not resolve the
problem.
If lest #03 is unsuccessful, the fault code displayed
is referenced to this table for probable failing assemblies.
Table 1-7.

TERMINA'frON CODES FOLLOWING FAULT CODES 04 OR 06
AND DIAGNOSTIC TEST 03

----"TERHINAT ION CODE
FAILING
ASSEMBLY
,

8
4

4 - 1 -5- - - - 6

A
TaEe is Not Thd'd
B
A
Test
'2--- l ' 1
ReadTWr i te7 Ser vo
Formatter Control
2
1----'
Power Amplifier
1
Read/Write Head
~-=-YE Hotor /Tach-------1

9
8

0
0

A
1

~~re

~e_at

~_matic

Pu~

Filter
Pres sur -e 'Regu 1a tor
NOTE:

3
1

I---

'-------

Termination Codes 85 thru 93 are not applicable.

Table 1-8 is referenced if, after executing Operator Diagnostic
Test #01,
Fault Code 26 or 32 appears on the display.
Referencing Table 1-2, Test #03 is required.
If Test #03 is
unsuccessful, the fault code is referenced to this table for
probable failing assemblies.
Table 1-8.
--

TERMINATION CODES FOLLOWING FAULT CODE 26 OR 32
AND DIAGNOSTIC TEST 03

TERMINATION CODE
FAILING ASSEMBLY

8
1

8
4

9
4

9 9
6 -8

Ensure Tape is Not Thd'd
A
Repeat Test
B A
1 1
~!lWr i t elSer'!...o
2 ,-- --2
Formatte[JContrOI
- , - - ' --- I - - 1Powa r Am E_liii~~_______~ 1
Rea -Write Ilea
fake-Up Hotor7Tach
'r f - - - 1
Pneumatic PumE
---- -'
Filter
Pressure Regulator
I--

NOTE:

0
0
>---

A
1
2

3
4
6

Termination Codes 85 thru 93 are not applicable.
1-8

1.2.3
On-Site
Prior to initiating any diagnostic test, a thorough visual
inspection of the transport should be performed.
Inspection of
the head
record ing sur face,
cleaner
blades,
wr i te enable
reflective
ring,
hub
assemblies,
and
proper
seating
of
electrical connectors is always the first step in an organized
troubleshooting procedure.
After the visual inspection, a functional check of the transport
should be performed as follows:
1.

Perform Functional Troubleshooting Procedure 1001.
This
procedure checks out the functional operation of the
transport,
including
ancillary
sensors,
which
the
microprocessor
cannot
fault
detect,
wi thout
manual
operation and visual feedback.

Refer to the individual
specific fault codes.

Perform
any
corrective
action
troubleshooting procedures.

Verify operation of the transport by again performing
Operator Diagnostic Test #01 or other verification tests,
as directed by the troubleshooting procedure.

troubleshooting
as

procedures

directed

for
the

1.3
DIAGNOSTIC TESTS
The maintenance philosophy for trouble analysis of the TUBD is
to minimize the time it takes to restore the TUBO to an on-line
status, after a reported fault condition occurs.
This is
accomplished by providing two types of diagnostics:
1.

Operator Diagnostic Tests \-lhich
reporting the fault condition.

2•

Field Service
per sonne 1 when
action.

are

initiated

prior

tests to be performed by maintenance
they report to the site for corrective

1-9

1.3.1
Operator Diagnostics
The operator diagnostics are a series of functional tests which
direct the operator's actions after a fault code appears.
Operator tests, procedures and a fault code/corrective action
table are contained in the TU80 Subsystem User Guide~
The fault
code may indicate anyone or more of the following types of
fault conditions:
o

Environment or Media Problems
This type of problem would direct the operator to clean the
tape path area and/or use another known good quality tape.

Opera~or Error Problem
'This type of problem would indicate conditions such as door
not
present,
tape
threaded
open,
wr i te
enable
ring
incorrectly, etc.

Transport Circuit Problems
These would be fault conditions which require field
personnel intervention.

service

It is the responsibility of the Field Service Representative to
ensure that the operator performs the applicable diagnostic, and
determine from the operator the fault code which appears, after
running the operator diagnostic.
Because the operator diagnostics are an integral part of the
trouble analys is procedures, subsequent paragraphs contain the
procedure to initiate this diagnostic.
The only difference
between the procedure contained in the OPERATOR DIAGNOSTIC
section of the TU80 Subsystem User Guide, and the following
procedure, is an expanded feature to display a Sub-Fault Code
for maintenance purposes.
1.3.2
Operator Diagnostic Procedure
Th e 0 per a tor d i a g nos tic s con sis t 0 f 0 n e s e 1 e c tab 1 e t est whie h
runs for approximately 10 minutes when a 2400 foot tape is
used.
Faults
encountered
dur ing
the
test
terminate
the
diagnostics and display a numerical code on the display panel.
Any fault code should be logged by the operator and reported to
field service personnel if operator corrective actions do not
resolve the problem.
The operator diagnostics are initiated as
follows:

1-10

Transport Status
1.

TU80 powered on (LOGIC ON indicator illuminated).

Tape threaded through tape pa th and onto
but not loaded (untensioned).

take-up reel,

Test Procedure
1.

Press TEST switch.
a.

DIAGNOSTIC indicator illuminates.

Display on control panel indicates 01.

Press EXECUTE switch.
a.

Test starts with the display incrementing from 00,
11, 22 thru 99.
Verify that all segments of the
numerical display are functioning.

above,
Concurrent
with
step
a.
indicators are illuminated:
FILE
ON-LINE, RESET and DIAGNOSTICS.

the
PRO,

following
LOGIC ON,

Test continues with various motion and
exercises for approximately 10 minutes.

read/write

The TU80 performs a Rewind/Unload operation and 00 is indicated
on the dis P lay pan e l i f the t est run s to com p let ion.
1 f t he
test is unsuccessful, the test terminates and a fault code
appears on the display panel.
If the problem cannot be resolved
through operator actions, as indicated in Table 1-2, the fault
code is referenced directly to the corresponding troubleshooting
procedure for corrective action.
When the Fault Code Troubleshooting Procedures are referenced
for corrective action, a Sub-Fault Code interrogation may be
required.
With the fault code still indicated on the display
panel, press and hold the CE switch. This action will cause the
Sub-Fault Code to appear on the display.

1-11

1.3.3
Field Service Diagnostic Tests (Section 2)
The Field Service Diagnostic Tests should be performed, in
conjunction
with
the
requirements
of
the
Fault
Code
Troubleshooting Procedures.
When reporting to the site, obtain
as m.uch information from the operator and operating system, as
is available.
Fault Codes, the frequency at which they occur
and, if possible, the operation in progress at that time, are
all things which should be considered prior to execution of the
diagnostics.
If the fault is intermittent, the information
received
from
the
operator
and
operating system may
be
instrumental in directing field service personnel to appropriate
test to duplicate the condition under which the fault occurs.
If the fault condition is a "hard error", or one which occurs
frequently, start the troubleshooting procedure by executing
Operator Diagnostic Test #01.
This test is a lead-in to all
fault codes and SUbsequent troubleshooting procedures.
1.3.4
Field Service Diagnostic Tests
The Diagnostic Tests are initiated as follows:
o

TU80 Status
Status requirements of the transport are
individual Field Service Diagnostic Tests.

listed

Test Procedure
1.

While pressing CE switch, press TEST switch.
a.

DIAGNOSTICS indicator illuminates.

Display panel indicates 00.

1-12

the

Press STEP swi tch.
a.

Display numDer increments eacn time STEP is pressed,
or will increment automatically, if STEP is held
pressed.

To s e 1e c t a t est ,
use
the f 0 1 10 \J i n g
Example: Test #39 selection required.
- t?ress STt:P switcn
panel.

pro c 2 d u r e .

until 03 appears on the display

- Pre ssT t: ST s \'1 i t c han d t b e 3 dig i t t ran s fer s tot h e
left.
- Display now indicates 30.
- Press
STEP
switch
again
increments from 30 to 39.
c.

until

the

display

If tes t opt ions (see Sec t ion 2) are des ired, press
and hold CE s~itch, then press EXEC while CE is held
pressed.
Display will indicate 00.
STEP switch is
then pressed to select the desired option.

Press EXECUTE switch.
a.

Test is initiated.

If the test runs to completion, toe display indicates 00.
test fails, the display indicates the fault code.

1-13

1. 3 . 4 . 1
Fie 1 d S e r v 1 c e S p e cia 1 LOA D/ UN LO AD Pro c e d u res - Wh i 1 e
performing specific Fault Code Procedures, the Field Service
Re pre sen tat i verna y bed ire c ted top e r for maT EST LO ADo ran
UNTENSIONED UNLOAD procedure.
A description of these special
procedures is as follows:
o

TEST LOAD
This function is used if a reel of tape is
suspected of not being wrapped properly and a tape re-wrap is
necessary.
DIAGNOSTIC

indicator

lights

and

Press TEST Switch
display indicates 01.

Press LOAD Sv'li tch - Forward tape motion is initiated to
EDT. The take-up reel motor moves tape while the supply
When EDT is
reel motor
is completely untensioned.
detected, a normal rewind function is initiated (with
tape tension) to BOT.

UNfENSIONED UNLOAD
This function is used to unwrap tape
from the take-up reel onto the supply reel following a servo
fault.
The velocity servo (take-up reel motor) is completely
untensioned while the supply reel moves tape in the reverse
direction.
Press the UNLOAD switch while tape is untensioned
(not loaded).
If tape is tensioned, press the logic "OFF"
svlitch, then press the logic "ON" switch to untension tape.

1.3.5
Sub-Fault Codes
The troubleshooting procedures may direct the Field Service
Representative to display the sub-fault code associated with the
primary fault code.
fhe sub-fAUl.t code is displayed by pressing
the CE switch after the primary fault code appears on the
digital display.
The sub-fault code will be displayed as long
as the CE switch is held pressed.

1-14

f.4
FAULT CODE TROUBLESHOOTING PROCEDURES
After a fault code appears on the display, reference the fault
code number directly to the corresponding number of
the
troubleshooting procedures listed numerically on subsequent
pages. The bas i c troub leshoo t i ng proced ure forma t (Figur e 1-1)
uses YES (Y) or NO (N) responses to sequential conditions to
lead maintenance personnel to appropriate corrective action.
Wh en a f a IJ 1 tea n bee a use d by any 0 n e 0 f s eve r a 1 f act 0 r s, the
separate actions to correct each of these factors are numbered
according to priority level with the action, having the highest
probability of success, being listed as number 1.
If several
actions have the same probability of correcting the fault, the
one that is easiest to perform (takes the least time) is listed
as the first action.
FAULT CODE TROUBLESHOOTING PROCEDURE 0032

FAULT CODE

Fault Code Appea "ing

0" Display Panel ~ ------------- ]

FAULT CODE 32

-------------

Maintenance
Symptom -'- - - - -. . . .

Assumption:

Response For
Question A, sked------~
Step

Reference
Number

020
Action To
De Performed

I
I
I
I•

OWC0
070

Indicates Only
080
One Action To - - - - - - - - '
Be Taken
090

result

Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

---_.,-" ---.. -.. -- ..- .. N Without tape threaded, execute Diagnostic Test 03.
Termination Code 96 or 981

I
I
I

I
I

Code

NOTE

...

T I
First Action._
050
To Be Taken
___

TU80 displays Fault
velocity servo fault.

1
-

"-"'''' ,

---"'-~

.. "".""---.---.-.---~

-----~-------,,--.----.--.----.~------.-.------

Termination Code 82?
Termination Code 84?

Replac~ Read-Write-Servo Module (See No~e
3 on
page 2-31).

-------,,----.-.-----------.-----~---

Replace Power Amplifier Module.
Replace Take-up Motor/Tach Assembly.
Replace Air Filter.
Replace Pump Assembly.
Replace Regulator Assembly.

Underlined Indicates
Last of Numerical
Sequence of Actions

Figure 1-,1.

EXAMPLE OF FAULT CODE TROUBLESHOOTING PROCEDURE

l-14A/B

FAULT CODE TROUBLESHOOfING PROCEDURE 0001

FAULT CODE 01

FAULT CODE 01
Assumption:

TU80 displays Fault Code 01 as a result of failing
to detect a read signal during a read amplitude
checking diagnostic test.
The most probable cause of this fault is a dirty
read-write head.
Another possible cause is damaged
tape.
NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

010

020

030

040
050
060
070

I
I

Clean read-write head, tape cleaner and tape guides.
Chang eta pet 0 a k no \J n goo d wr i tee nab 1 edt ape .
Ensure that cables between read-write head and
Read-Write-Servo Module are correctly connected.
Ensure that write current selection resistors (R224 and
R225) are correctly installed in Read-Write-Servo Module.
Replace Read-Write Head Assembly.
R~place

Read-Write-Servo Module (See Note 3, page 2-31).

Replace Formatter-Control Module.

1-15

FAULT CODE TROUBLESHOOTING PROCEDURE 0002

FAULT CODE 02

FAULT COOt: 02
Assumption:

TUBO displays Fault Code 02 as a result of
de tee tin g a r e a dam p 1 i t u d e 0 u t 0 f ran g e d uri n g a
read amplitude checking diagnostic test.
The most probable cause of this fault is a dirty
read-write head. Another possible cause is damaged
tape.
NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 shou ld be
executed.

010
020
030
040
050
060
070

I
I

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.
Ensure that cables between read-write head and
Read-Write-Servo Module are correctly connected.
Ensure that write current selection resistors (R224 and
R225) are correctly installed in Read-Write-Servo Module.
Replace Read-Write Head Assembly.
Replace Read-Write-Servo Module (See Note 3, page 2-31).
Replace Formatter-Control Hodule.

1-16

FAULT CODE TROUBLESHOOTING PROCEDURE 0003

FAULT CODE 03

FAULT CODE 03
Assumption:

TU80
displays
Fault
Code
03
during
Operator
Diagnostic Test 01 due to a failure to read or
write the PE identification burst at load point.
The probable cause of this fault is damaged tape.
The tape should be free of defects within the first
six inches of tape after the BOT reflective marker.
NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

010
020
030
040

060
070

I
I

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.
Ensure that Formatter-Control and Read-Write-Servo
Modules are firmly connected.
Replace Formatter-Control Module.
Replace Read-Write-Servo Module (See Note 3, page 2-31).
Replace Read-Write Head.

1-17

FAULT CODE TROUBLESHOOTING

PROC~DUR£

OOOl~

FAULT CODE 04

TU80
displays
Fault
Code
04
during
Operator
Diagnostic Test 01 due to a failure to voJrite a
block within five attempts at low speed.

Assumption:

The probable causes of
and damaged tape.

this

fault

are dirty

head

NOTE

Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.
010

020

030

040

050
060
070
080

090
100
110
120

I
I

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.
Ensure that Formatter-Control and Read-Write-Servo
Modules are firmly connected.

Y N

I
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I
I
I
I
I

I
I

~I i tho u t

tap e t h rea de d, ex e cut e Te s t 03.
Termination Code 98?

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I

Termination Code 96?

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I

I TIT

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I

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I

Termination Code 82?
N

Termination Code 84?

Replace Read-~vrite-Servo Hodule (See Note :3
on page 2-31).

Replace Formatter-Control Module.

I
I
I

Replace Read-Write Head Assembly.

Replace Take-Up Motor Assembly.

Replace Power Amplifier Module.

1-18

FAULT CODE TROUBLESHOOTING PROCEDURE 0005

FAULf CODE 05

FAULT CODE 05
Assumption:

TU80
displays
Fault
Code
05
during
Operator
Diagnostic Test 01 due to a failure to read a block
in forward or reverse direction at low speed.
The probable causes
and damaged tape.

this

fault

are dirty

head

NOTE
action,
any
corrective
Following
Operator Diagnostic Test 01 should be
executed.
010

020

030

040

050

I
I
I

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.
t

Replace Read-Write-Servo Module (See Note 3, page 2-31).
Replace Formatter-Control Module.
Replace

Read-~vr i te

Head.

1-19

FAULT CODE 06

FAULT CODE TROUBLESHOOTING PROCEDURE 0006
FAULT CODE 06
Assumption:

TU80
displays
Fault
Code
06
during
Operator
Diagnostic Test 01 due to a failure to write a
block within 5 attempts at high speed, or due to
too many write errors while writing to EOT.
The probable causes
and damaged tape.

this

fault

are dirty head

NOTt:

action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010
020

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.

Ensure that Formatter-Control and Read-Write-Servo
Modules are firmly connected.

040

Without tape threaded, execute Test 03.
Termination Code 98?

050

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I

030

060
070

I
I

090

I
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I
I
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I

120

110

080

100

I
I

Termination Code 96?
N

Termination Code 82?

Y N Termination Code 84?
I·

I
I
I

TTl

I
I

Re place Read -t<lr i te-Servo ~1od u le (See No te 3
on page 2-31).
Replace Formatter-Control Module.
Replace Read-Write Head Assembly.

Replace Take-Up Motor Assembly.

Replace Power Amplifier Assembly.

1-20

FAULT CODE TROUBLESHOOTING PROCt:DURE 0007

FAULT CODE 07

FAULT CODE 07
Assumption:

TU8D
displays
Fault
Code
07
during
Operator
Diagnostic Test 01 due to a failure to read a block
at high speed.
The probable causes of
and damaged tape.

this

fault

are dirty head

NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010

020

030

040

050

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good write enabled tape.
Replace Read-Write-Servo Module (See Note 3, page 2-31).
Replace Formatter-Control Module.
Rep lace Re ad -~~r i te Head.

1-21

FAULT CODE 08

FAULT COnE TROUBLESHOOTING PROCEDURE 0008
FAULT CODE 08
Assumption:

TU80
displays
Fault
Code
08
during
Operator
Diagnostic Test 01 due to detection of noise during
IBG.
The probable causes
and damaged tape.

this

fault

are dirty head

NOTE
action,
any
corrective
Following
Operator Diagnostic Test 01 should be
executed.
010
020
030
040
050

1-22

FAULT CODE TROUBLESHOOTING PROCEDURE 0010

FAULT CODE 10

FAULT CODE 10
Assumption:

TU80 displays Fault Code 10 as a
detecting an open top cover condition.

result

The most probable cause of this fault is the top
cover being open.
During any normal operation,
including
execution
of
diagnostic
tests
that
require reel motion, the top cover must be closed.

NOTE
Following any corrective action, the
top cover should be closed and Operator
Diagnostic Test 01 should be executed.
010
020
030

040
050
060

070

I
I

Ensure that all interlock switch leads are unbroken and
firmly connected to the top cover switch assembly.
Ensure that all cables are firmly connected to the
Read-Write-Servo Module.

Y N usirig a DVM with negative terminal connected to TP8"of
I I Read-Write-Servo Module, measure voltages on outermost
I I terminals of interlock switch while the top cover is
I I closed. Is voltage difference greater than 0.2 volt?

I
I
I
I
I
I
I

I
I
I

Y N Repeat previous operation for innermost terminals.
I I Is voltage difference greater than 0.2 volt?

I
I
I
I

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Ensure Door Switch Plunger on the top cover lines up
with interlock switch and depresses switch when the
top cover is closed.

Replace Interlock Switch Assembly.

I
I
I

1-23

FAULT CODE TROUBLESHOOTING PROCEDURE 0011

FAULT CODE 11

FAULT CODE 11
Assumption:

TUBO displays Fault Code 11 as a result of
detecting an absence of tape condition during a
load operation, or a diagnostic test that requires
tape threaded.
The most probable cause of this fault is that tape
is not threaded.
Another possible cause is that
tape is threaded with tape that has oxide removed.
NOTE
Following any corrective action, a tape
load operation should be performed.

010
020

030

040
050

Thread tape and retry load operation
Mount a new reel of tape and retry load operation.

Y N Disconnect cable from BOT/EaT Sensor Assembly. With
I I operator door closed, press Load/Rewind switch.
I I Is Fault Code 11 reported?

I
I
I

T T

Replace BOT/EaT Sensor Assembly.
Replace ~ead-Write-Servo Module (See Note 3 on
page 2-31).

1-24

FAULT CODE TROUBLESHOOTING PROCEDURE 0012

FAULT CODE 12

FAULT CODE 12
Assumption:

TUBa

displays Fault Code 12 as
detecting a hub unlatched condition.

result

The most probable cause of this fault is that
supply hub was not latched after mounting a new
reel of tape.
A possible cause is that tape being loaded has been
subjected
to
extreme
temperature
or
humidity
changes.
These tapes can sometimes be recognized
by shaking the full reel and hearing tape pack move
relative to reel.
Also, while loading tape, it
will
be
seen
that
hub
and
reel
rotate
counterclockwise
while
pack
of
tape
rotates
clockwise. To continue us ing these tapes, the pack
requires to be rewrapped at correct tension.
Th'is
is achieved by performing a test load operation
which wraps all tape onto take-up reel, and then
returns tape, correctly tensioned, to the supply
reel.
Other possible causes of Fault Code 12 are:
1.
2.
3.

Loading a tape while in tape trailer.
Loading a tape with a short leader.
Load ing a
tape wi th
EOT/BOT sensor
disconnected.

cable

NOTE
Following any corrective action, a tape
load operation should be performed.
010
020
030
040

I
I
I
I
I

Mount a new reel of tape and retry load operation.
Remove supply reel from supply hub and clean hub pads.
N

I
I

Remount reel and latch hub. While holding hub, can
reel be easily rotated in either direction?

1. Replace

I
I

Read-~.jrite-Servo

page 2-31).

1-25

Module (See Note 3 on

FAULT CODE 12

FAULT CODE 12 (Cont'd)

A B
1

050

060

I
I
I
I
I

Replace Supply Motor/Tach Assembly.
Replace BOT/EDT Sensor Assembly

Replace Supply Reel Hub Assembly.

1-26

FAULT CODE TROUBLESHOOTING PROCEDURE 0013

FAULT CODE 13

FAULT CODE 13
TU80 displays Fault Code 13 during a load operation
as a result of not establishing tension within 10
seconds.

Assumption:

The most probable cause of this fault is that tape
has been threaded with a long loop, or tape has not
been tightly wrapped on take-up hub.

NOTE
Following any corrective action, a tape
load operation should be performed.
010

020

030

040
050

Y N Execute Field Service Functional Test 43.
I I fail to start?

I
I
I
I
I

070

I
I
I

090

Mount a new reel of tape and retry load operation.

060

080

Thread tape and retry load operation.

I
I

Does pump

Y N Does air pressure lift tape off air bearings?

I
I
I
I
I
I
I

Replace Filter.
Replace Pu~p Assembly.
Replace Regulator Assembly.

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Replace Power Supply Assembly.

1-27

FAULT CODE rROUBLESHOOTIHG PROCEDURE 0014

FAULT CODE lLl

FAULT CODE 14
Assumption:

TU80 displays Fault Code 14 during a load operation
as a result of running off the end or beginning of
tape without detecting BOT or EaT marker during a
load operation, or absence of tape is not found
during an unload operation.
The most probable cause of this fault is that tape
leader is too long, or BOT or EaT reflective marker
is missing.
A possible cause is that a load
operation was initiated while in trailer.
ANSI
Standard X3.39 specifies that BOT reflective marker
should be placed from 14 feet to 18 feet from
physical beginning of tape.
NOTE
Following any corrective action, a tape
load operation followed by an unload
operation should be performed.

010

020

Replace BOT/EOT Sensor Assembly.

Replace Read-Write-Servo Module (See Note 3, page 2-31).

030

Haunt a new reel of tape and retry load operation.

1-28

FAULT CODE TROUBLESHOOTING PROCEDU~E 0015

FAULT CODE 15

FAULT CODE 15
Assumption:

TU80 displays Fault Code 15 as a result of load or
unload operation being aborted.
The most probable cause of this fault
operator pressed RESET switch during a
unload operation.

is that
load or

NOTE
Following any corrective action, a tape
load operation followed by an unload
operation should be performed.
010

020

030

040

I
I

Repeat a load or unload operation.
Replace Operator Panel Assembly.
Replace Rea d - ~v r i t e - S e r v 0 Hod u 1 e (See Note 3 , page 2-31).
Replace Formatter-Control Module.

1-29

FAULT CODE TROUBLESHOOTING PROCEDURE 0016

FAULT CODE 16

FAULT CODE 16
Assumption:

TUBa

displays Fault Code 16 on execution of a
Read/Write Diagnostic Test with a write protected
scratch tape.
The most probable cause of this fault is that the
scratch tape in use does not have a write permit
ring installed.

NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010
020

030

040
050

060
070

I
I

I
I
I
I
I

Install a write enable ring in a scratch tape reel.
Remove write enable sensor cover plate and ensure
connector is correctly connected to sensor.
N

Does write permit ring push reflective ring part of
Supply Reel Hub Assembly in line with write enable
sensor?

Replace Supply Reel Hub Assembly.

I
I
i

Replace Write Enable Sensor Assembly.
Replace Read-Write-Servo Module (See Note 3, page 2-31).
Replace Formatter Control Module.

1-30

FAULT CODE TROUBLESHOOTING PROCEDURE 0017

FAULT CODE 17

FAULT CODE 17
Assumption:

TU80 displays Fault Code 17 dS
off the physical end of tape.

result of running

The most probable cause of this fault is that the
system
continued
issuing
Forward
Read/Write
co mm and s aft erE OT has bee n sen sed .
A po s sib 1 e
cause is that trailer is too short (ANSI Standard
X3.39 specifies trailer should be longer than 25
feet) .
NOTE
any
corrective
action,
Following
Operator Diagnostic Test 01 should be
executed.
010
020

030

I
I

Load a kno~vn good tape and execute Field Service
Functional Test L.l•• Does tape stop within trailer?

T I

Replace Read-Write-Servo Module (See Note 3 on
page 2-31) .

Replace Formatter-Control Module.

1-31

FAULT CODE TROUBLESHOOTING PROCEDURE 0018

FAULT CODE 18

FAULT CODE 18
Assumption:

TU80 displays Fault Code 18 as a result of
attempting to execute a Diagnostic Test which
requires tape to be untensioned.
The most probable cause of this fault is that tape
is already loaded while attempting to execute a
test thnt requires tape to be untensioned.
NOTE
action,
F0 110 wing
any
cor r e c t i ve
Operator Diagnostic Test 01 should be
executed.

010

020

Replace Formatter-Control Module.

Replace Read-Write-Servo Module (See Note 3 , page 2 - 31).

030

Unload, thread tape, and retry operation.

1-32

FAULT CODE TROUBLESHOOTING PROCEDURE 0020

FAULT CODE 20

FAULT CODE 20
Assumption:

TU80 displays Fault Code 20 as a result of a file
tension fault.
NOTE

Following any corrective action, a tape
load operation or Operator Diagnostic
Test 01 shoul.d be executed.
010

020

Y N Sub-Fault Code 05?
I I
I Y N Sub-Fault Code 02 or 04?

030
040

050
060

I
I

I
I
I
I
I
I

I
I

Ensure that cable between Supply Air Bearing Assembly and
Read-Write-Servo Module is correctly connected.

I
I
I
I
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I
I
I

I
I
I
I

I
I

N Disconnect cable between Supply Air Bearing
I Assembly and Read-Write-Servo Module at
I Read-tIr i te-Servo Hodule Assembly. Try to load a
I tape. Fault Code 20 Sub-Fault Code 05?
9

I
I
I
I

Replace Supply Air Bearing Assembly.
Reconnec t cable.
Replace Read-Write-Servo Module (See Note 3 on
Reconnect cable.

T T T T page 2-31).

1-33

FAULT CODE 21

FAULT CODE TROUBLESHOOTING PROCEDURE 0021
FAULT CODE 2l
Assumption:

TU80 displays Fault Code
take-up tension fault.

result

NOTE

Following any corrective action, a tape
load operation or Operator Diagnostic
Test 01 should be executed.
010

Ensure that cable between Take-Up Air Bearing Assembly
and Read-Write-Servo Module is correctly connected.

020

N Sub-Fault Code 05?

030
040

050
060

I
I

I
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I

I
I

I
I
I
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I
I
I
I
I

I
I
I
I

I
I

Sub-Fault Code 02 or 03 or 04?
N

I
I
I
I
I
I
I

Disconnect cable between Take-Up Air Bearing
Assembly and Read-Write-Servo Module at
Read-Write-Servo Module Assembly. Try to load
tape. Fault Code 21, Sub-Fault Code 05?
Replace Take-Up Air Bearing Assembly.
Re con nee tea b 1 e .
Replace Read-WrIte-Servo Module (See Note 3 on
Reconnect cable.

T T T T page 2-31).

1-34

FAULT CODE TROUBLESHOOTING PROCEDU~E 0022

FAULT' CODE 22

FAULT CODE 22
TU80 displays Fault Code 22 as a result of being
unable to maintain tape tension during a tape load
operation.

Assumption:

The most probable cause of this fault is that the
tape be ing loaded has been subjected to extreme
temperature or humidity changes.
These tapes can
sometimes be recognized by shaking the full reel
and hearing the tape pack move relative to the
reel.
To continue using these tapes, the pack
r e qui res t 0 b ere - ~J rap p e d a t the cor r e c t ten s ion.
At the time of reporting the fault, all the tape
may have
been removed
from the supply reel.
Recovery for this case will be to re-wrap the tape
onto the file reel (to the BOT side of the EOT
marker) and perform a normal load operation.
If
tape was not removed from the supply reel, an
unload operation should be performed to remove the
tape.
NOT~

A
tape
load
operation
should
be
performed
following
any
corrective
action.
During load operation, file
reel should be observed for pack slip.
010
020
030
040
050
060
070

Rewind tape onto file reel and repeat load operation.
Mount a new reel of tape and retry load operation.

Clean read-write head, tape cleaner and tape guides.

Unload reel using Untensioned Unload command.
reel and clean hub pads.

T
I
I

I
I
I
I
I
I
I

I
I

Hount reel and latch the hub. While holding hub,
can reel be easily rotated in either direction?

I
I
I
I

Remove

Sub-Fault Code 03 or 04 or OS?

I
I

2
C

Execute Diagnostic Test 02 with tape threaded.
Termination Code 70.

2
D

1-35

FAULT CODE 22
FAULT CODE 22 (Cont'd)

A
1
080
090
100
110

120
130

140
150
160

I
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I

C
1

I
I
I
I

1
Invalid operator sequence (Refer to Diagnostic
Test 02, page 2 - 7) .

I
I
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I
I
I
I

I
I
I
I
I
I

Termination Code 841

I
I
I
I
I

Termination Code 92?

I
I
I

I
I
I
I
I

Execute Operator Diagnostic Test 03
without tape threaded. Termination
Code 96 or 98?

T T I

Replace Read-Write-Servo Module
(See Note 3 on page 2-31) .

Replace Power Amplifier Module.

Replace Supply Motor/Tach Assembly.
Replace Take-up Motor/Tach Assembly.

Replace Supply Hub Assembly.

1-36

FAULT CODE TROUBLESHOOTING PROCEDURE 0023

FAULT CODE 23

FAULT CODE 23
Assumption:

TU80 displays Fault Code 23 as a result of being
unable to re-establish tape tension during a tape
load operation.
The most probable cause of this fault is that the
tape being loaded has been subjected to extreme
temperature or humidity changes.
These tares can
sometimes be recognized by shaking the fu 1 reel
and hearing the tape pack move relative to the
reel.
To continue using these tapes, the pack
r e qui res t 0 bel' e - ~v rap p e d a t the cor r e c t ten s ion .
At the time of reporting the fault, all. the tape
may have been removed
from the supply reel.
Recovery for this case will be to re-wrap the tape
onto the file reel (to the BOT side of the EOT
label) and perform a normal load operation.
If
tape was not removed from the supply reel, an
unload operation should be performed to remove the
tape.
NOTE
A
tape
load
operation
should
be
performed
following
any
corrective
action.
During load operation, file
reel should be observed for pack slip.

010

020

030

040

I
I

I
050

Rewind tape onto file reel and repeat load operation.
Mount a new reel of tape and retry load operation.
Ensure that the cable is correctly connected to BOT/EOT
Sensor Assembly.
Replace Read-Write-Servo Module (See Page 3, page 2-31).
Replace Supply Motor Tach Assembly.

1-37

FAULT CODt: TROUBLESHOOTING PROCEDURE 0024

FAULT CODE 24

FAULT CODE 2Lf
Assumption:

TU80 displays Fault Code 24 as a result of a high
tension detected on both air bearings.
NOTE:

action,
Following
any
corrective
Operator Diagnostic Test Ol should be
executed.
010

Y N Execute Diagnostic Test 02 with tape threaded.
I I Termination Code 70?

020

030
040
050
060
070

I
I
I
I

Invalid operator sequence (Refer to Diagnostic Test 02
on page 2-7).

I
I
I
I
I
I

Termination Code

Termination Code 73 or 74 or 92 or 98?

T I

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Replace Power Amplifier Module.

I
I

8t or 82?

Replace Supply Motor/Tach Assembly.

1-38

FAULT CODE TROUBLESHOOTING PROCEDURE 0025

FAULT CODE 25

FAULT CODE 25
Ass urn p t ion :

T U8 0 dis P 1 a y s Fa u l t Cod e 2 5 a s are s u 1 t 0 f a 1 0 \<J
tension condition being detected on one of the air
bearings.
The most probable cause of this fault is damaged
tape.
Should tape be torn, then the fault can
occur as tape passes over air bearing.
Another
cause, with stiction tapes, is when tape sticks to
read-write head.
NOTE

any
corrective
action,
Following
Operator Diagnostic Test 01 should be
executed.
010
020
030
OL.O

I
I

Clean read-write head, tape cleaner and tape guides.
Change tape to a known good, write enabled scratch tape.
Unload reel using Untensioned Unload command.
reel and clean hub pads.
N

I
I

Remount reel and latch hub. While holding hub, can
reel be rotated in either direction?

050

Y N

060

070

I
I
I
I

I
I

Execute Diagnostic Test 03 without
tape threaded. Termination Code 98?
Replace Power Amplifier Nodule.
Replace Read-Write-Servo Module (See Note 3 on

T T page 2-31).
I

Remove

080

Replace Take-Up Motor/Tach Assembly.

090

Replace Supply Hub Assembly.

1-39

FAULT CODE TROUBLESHOOTING PROCEDURE 0026

FAULT CODE 26

FAULT CODE 26
Assumption:

TU80 displays Fault Code 26 as a result of a servo
fault.

NOTE
Following any corrective action Operator
Diagnostic Test 01 should be executed.
Following
any
corrective
action
for
Sub-Fault Codes 01 to 06, tape should be
threaded onto take-up reel, wound on by
hand for approximately 50 turns, and
then perform an Untensioned Unload.
For
a 11 0 the r Sub - Fa u 1 t Cod e s , t ape s h 0 u 1 d
be loaded and then unloaded.
010

020

Ensure all leads to door switch are unbroken and
correctly connected.

030

N Sub-Fault Code 09?
I
Y N \vith tape threaded, execute Diagnostic Test 02.
I I Termination Code 70?

I
I

040

Ensure all cables to Power Amplifier Assembly are
correctly connected.

050

I
I
I
I

Invalid operator sequence (Refer to Diagnostic
Test 02 on page 2-7).

060

Y N

070

N Termination Code 821

I
I
I

080
090
100
110
120

I
I
I
I
I

Termination Code 8l?

I
I
I
I

N Termination Code 841

I
I
I
I
I
I
I

I
I
I

Replace Power Amplifier Assembly.

Replace Supply Motor Assembly.

ITT

Replace Read-Write-Servo Module
(See Note 3 on page 2-31).

Replace Take-Up Motor/Tach Assembly.

2
A

1-40

FAULT CODE 26
FAULT CODE 26 (Cont'd)

A
1

130
140

ISO
160
170
180
190
200
210
220
230
240
250

I
Y N Without tape threaded, execute Diagnostic Test 03.
I I Termination Code 84?

I
I

Y N Termination Code 96?

I
I
I
I
I
I
I
I
I
I

Y N Does Take-Up Reel move during execution of
I I Test 03?

I
I
I
I

Replace Take-Up Motor/Tach Assembly.

Replace Door Switch (Interlock).

Does Take-Up

I
I
I

I
I
I
I

Ensure cable is correctly connected to
Take-Up Tach.

I
I
I
I
I
I

I
I
I
I

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

~eel

move during execution of Test 03?

Replace Door Switch (Interlock).
Replace Take-Up Motor/Tach Assembly.
Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Ensure cable is correctly connected to Take-Up Tach.
Replace Power Amplifier Assembly.

1-41

FAULT CODE TROUBLESHOOTING PROCEDURE 0027

FAULT CODE 27

FAULT CODE 27
Assumption:

TUBO displays
detecting any
reel.

Fault Code 27 as a result of not
single line tachs from the supply

N()T~

action,
Following
any
corrective
Operator Diagnostic fest 01 should be
executed.
010

I
I

Ensure that cable is correctly connected to Supply
Ta c h .

~10 tor

020

030

Tach positioned properly?
(Refer to Technical Manual, EK-OTU80-TM/ Pocket
Service Guide, EK-OTU80-PS)
! Position Tach properly.
Replace Read-Write-Servo Module (See Note 3, Page 2-31)

Replace Supply Motor/Tach Assembly.

040

I
I
I

I
I

1-42

FAULT CODE TROUBLESHOOTING PROCEDURE 0028

FAULT CODE 28

FAULT CODE 28
Assumption:

TU80 displays Fault Code
tension recovery timeout.

result

NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

010

Replace

Read-~Jrite-Sefvo

L10dule (See Note 3, page 2-31).

1-43

FAULT CODE 29

FAULT CODE TROUBLESHOOTING PROCEDURE 0029
FAULT CODE 29
Assumption:

TU8D displays Fault Code 29 as a result of
detecting absence of tape.
This fault can be
caused by the use of a damaged tape that has oxide
missing, such that the BOT and EaT sensors detect
light passing through the tape.
Unloadir.g of tape with
result in Fault Code 29.

short

leader

may

NOTE
action,
any
corrective
Following
Operator Diagnostic Test 01 should be
executed.
010
020

030
040

Mount a new reel of tape and retry operation.

I
I

Disconnect cable from the EaT/BOT Sensor Assembly.
Remove the reel of tape, close the top cover, and
press the LOAD switch. Fault Code II?

I
I

Replace BOT/EaT Sensor Assembly.

Replace Read-WrIte-Servo Module (See Note 3 on
page 2-31).

1-44

also

FAULT CODE TROUBLESHOOTING PROCEDURE 0030

FAULT CODE 30

FAULT CODE 30
Assumption:

TU80 displays Fault Code 30 as a result of a
detected fault on an Up ramp.
A possible cause of
this fault is when tape sticks to read-write head.
NOTE
Following
any
corrective
action,
Operator Diagnostic Test: 01 should be
executed.

010
020
030
040
050
060
070

Clean read-write head, tape cleaner and tape guides.

Y N With tape threaded, execute Diagnostic Test 02.
I I Termination Code 70?
I I
1

I
I
I

Invalid operator sequence (Refer to Diagnostic Test 02
on page 2-7).

Y N Termination Code 89?

I
I
I
I
I
I

Y N Termination Code 72?

I
I
I
I

Y N Termination Code 73?

I
I

Y N Termination Code 74?

080

090

I
I

Y N Termination Code 75?

100
110
120
130

I
I
I

Y
I

Termination Code 84?

I
I

Y N Termination Code 91?

Y N Termination Code 92?

2 2 2
ABC

D E

2
F

Termination Code 90?

Y N without tape threaded,
I
I
execute Operator
I
I . Diagnostic Test 03.
I
I
Termination Code 98?

222

1-45

FAULT CODE 30
--------------

FAULT CODE 30 (Gont'd)
--------- .._---

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

l/-lO
150
160
170
180
190

200
210
220
230
240

I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I

I
4

E
1

I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
2

I
I
I
I
I
I
I
I
I

T I T I
3 4 3 4
I T I T
I
I

I
I

I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
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I
I
I
I
I
I
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I
I
I
I
I
I

I
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I
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I
I
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I
I
I

I
I
2

T
I
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I
I
I
I
I
I

I
I
I

I
I
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I
I
I
I
I
I

I
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I
I
I
I
I
I
I
I
I

I
I

Termination
Code 96?

I
I

I
I
I
I

I
I
I
I
I

2
-

Termination
Code 82?

I
I
I
I
I

I
I

2
-

I
I
I
I
I

Termination
Code 84?
Replace Power
Amp Module.
Replace Take-Up
Motor Assembly.
Replace ReadWrite-Servo
f10dule
(See Note 3 on
page 2-31).
BOT/EOT Sensor.

Replace Air Filter.

Replace Regulator Assembly.

Replace Pump Assembly.

Replace Supply Air Bearing Assembly.
Replace Take-Up Air Bearing Assy.

1-46

FAULT CODE TROUBLESHOOTING PROCf:DURE 0031

FAULT CODE 31

FAULT CODE 31
Assumption:

TU80 displays Fault Code 31 as a result of a
detected fault on a Down ramp.
A possible cause is
a tape \}itll a damaged BOT marker.
NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

010
020
030
040
050
060
070
080

Clean read-write head, tape cleaner and tape guides.

I
I

I
I
I
I
I

I
I
I
I
I
I
I

090

100
110

120
130

I
I
I

2
A

With tape tnread2d, execute Diagnostic Test 02.
Termination Code 70?
Invalid operator sequence (Refer to Diagnostic Test 02
on page 2-7).
N

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

2
B

Termination Code 89?
N

Termination Code 72?

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

Termination Code 73 ?
N

Termination Code 74?

I
I
I
I
I
I
I
I
I
I
I
I
I
I

2
E

Termination Code 75?

I
I
I
I
I
I
I
I
I
I
I
I

2
F

Termination Code 84?

I
I
I
I
I
I
I
I
I
I

I
y

2
G

I
I
I
I
I
I
I
I

Termination Code 90'?
N

Termination Code 9l?

I
I
I
I
I
I

Termination Code 92?

I
I
I
I

1-47

Without tape threaded,
execute Operator
Diagnostic Test 03.
Termination Code 98?

FAULT CODE 31
-------------

FAULl' CODE 31 (Cont'd)
-------------

140
150
160

A
1

I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

170
180
190

200
210
220
230
240

I
I
I
I
I
I
I
I

-1

T
3

I
I
I

C
1

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

E
1

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I

T I T
I
I

F
1

I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I

I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I

I
I

I
I
I
I
I
I

Termination
Code 96?

I
I
I
I
I

I
I

I
I
I
I
I

I
I

I
I
I
I
I

Termination
Code 82?

I
I

Termination
Code 841
Repl ace POvler
Amp Module.

Replace Take-Up
Hotor Assembly.

Replace ReadWrite-Servo
Module
(See Note 3 on
page 2-31).

I
I

I
I
I
I
I

BOT/EaT Sensor.

Replace Air Filter.

Replace Regulator Assembly.

Replace Pump Assembly.

Replace Supply Air Bearing Assembly.
Replace Take-Up Air Bearing Assy.

1-48

FAULT CODE TROUBLESHOOTING PROCEDURE 0032

FAULT CODE 32

TUBO

displays Fault
velocity servo fault.

Assumption:

Code

result

NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 sbould be
executed.
010
020
030
040
050
060
070

I
I
I
I
I
I

I
I

T
I
I
I

~Jithout tape threaded, execute Diagnostic Test 03.
Termination Code 96 or 9B?

I
I
I
I
I
I

Termination Code 82?
N

I
I

Termination Code 84?
Replace Read-Write-Servo Module (See Note 3 on
page 2-31) .

Replace Power Amplifier Module.

Replace Take-up Motor/Tach Assembly.

OBO

090

Replace Air Filter.
Replace Pump Assembly.
Replace Regulator Assembly.

1-49

FAULT CODE TROUBLESHOOTING PROCEDURE 0033

FAULT CODE 33

FAULT CODE 33
Ass ump t ion :

T U8 0 dis P 1 a y s Fa ul t Cod e 3 3 a s are s u 1 t
positioning fault when about to write.

0 f a t ape

NOTE

action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010

020

I
I
I
I
I

OJO

N Remove reel of tape and execute Diagnostic Test 03.
I Termination Code 981

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Replace Take-up Motor/Tach Assembly.

1-50

FAULT CODE T~OUBLESHOOTING PROCEDURE 0034

FAULT CODE 34

FAULT CODE 3/..
Assumption:

TU80 displays Fault Code 34 as a result of the
transport losing positioning control at Load Point.

NOfE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010

Replace Read-Write-Servo Module (See Note 3, page 2-31).

1-51

FAULT CODE TROUBLESHOOTING PROCeDURE 0035

FAULT CODE 35

FAULT CODE 35
Assumption:

TU80 displays Fault Code 35 as a result
transport losing positioning control.

NOTE
Following
any
corrective
action,
Operator Diagnostic Test 01 should be
executed.

010

020

II 1I Replace Read-Write-Servo Module (See Note 3 on

030

I
I

N Remove reel of tape and execute Diagnostic Test 03.
I Termination Code 98?
page 2-31).

Replace Take-up t-lotor/Tach Assembly.

1-52

the

FAULT CODE TROUBLESHOOTING PROCEDURE 0036

FAULT CODE 36

FAULT CODE 36
Assumption:

TU80 displays Fault Code 36 as a result of a speed
fault.
NOTE
Following
any
corrective
action,
Operator Diagnostic Te:,t 01 should be
executed.

010
020
030

050
060
070
080
090
100
110
120

Y N With tape threaded, execute Diagnostic Test 02.

I
I

I
I
I
I
I

Invalid operator sequence (Refer to Diagnostic
Test 02, page 2-7).

I
I

I
Y N Termination Code 73?'

Y N Termination Code 89?

140
150

I
I

I
I
130

Termination Code 70?

I
I

I
I
I

Termination Code 72?

I
I

I
I
I
I
I
I

1
1
I

1
I

I
1

1
1

1
I

I
I

I
I
I
I

I
1
1

N Termination Code 74?

A B

I
1

I
I

2
E

I
I
I
I
I
I
I

I
I
I
I

Termination Code 751
N

Termination Code 84?

I
I
1

I
I
I

N Termination Code 90?

I
I
I

I
I

1
1

I
I
I
I

I
I

I
I
I
I

Termination Code 91?

I
I

1-53

I
I
I
I
I
I
I

2
J

Termination Code 92?

Without tape threaded,
execute Diagnostic Test 03.
Termination Code 98?

Termination Code 96?

I
I
I
I
I
I

Y N Termination Code 82?
I I
I Y N Termination
I I I Code 84?

2
K

222

FAULT CODE 36
-------------

FAULT CODE 36 (Cont'd)
----------_._-

160
170

180

1
1

1
1
1
1

I
I

1
1

200
210
220
230

1
1

I
I
I

1
1

190

I
I
I
I
I
I
I
I

I
I

1
1

1
1
1
1

1
1

-2

I
I

I
I
I

I
1

1
1

I
I
I
I
I
I

1
1

I
I
1

T I T I
I

1
1
1

I
I

1
1

K
L

2
.-

Replace Power
Amplifier Module.

Replace Take-Up
Motor Assembly.
Replace Readte-Servo
Nodule
(See Note 3 on
page 2-31).

~vr i

Replace Air Filter.
Replace Regulator Assembly.

1
1

Replace Supply Ai.r Bearing Assembly.

Replace Take-Up Air Bearing Assembly.

Replace Pump Assembly.

1-54

FAULT COOt: TROUBLESHOOTING PROCEDUR£ 0037

FAULT CODE 37

FAULT CODE 37
Assumption:

displays Fault Code 37 as a result of not
being able to re-establish tension within 5 seconds
of pump power-up.

TUBO

NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010
020
030

Replace Read-Write-Servo t·tod u le (See Note 3 , page 2 -31) .
Replace Power Amplifier Module.
Replace Supply Motor/Tach Assembly.

1-55

FAULT CODE TROUBLESHOOTING PROCEDURE 0047
FAULT

FAULT

CODE Lt· 7

CODE t+ 7

Assumption:

TU80 displays Fault Code 47 resulting
velocity correction calculation fault.

from

This fault can be caused by the velocity correction
factor
in the back-up memory being corrupted.
Should this be the case, the Power-on Health Check
should
fault,
displaying
Fault
Code
51.
To
overcome this problem, Field Service Diagnostic
Test 37 could be executed.
However,
if
all
precautions are taken, the back-up memory should
never be corrupted.
NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010

Replace Read-Write-Servo Module (See Note 3, page 2-31).

1-56

FAULT CODE TROUBLESHOOTING PROCEDURE 0048

FAULT CODE 48

FAULT CODE 48
Assumption:

'TU80 displays Fault
unload fault.
This
damaged tape leader.

Code 48 resulting from an
fault can be caused by a

NOTE
Following any corrective action, tape
should be loaded and unloaded again.
Clear Read-Write Head, tape cleaner and tape guides.

010

020

Chan get ape to a k n 0 \~ n goo d tap e .

030

N Without tape threaded, execute Diagnostic Test 03.
I Termination Code 98?

040
050
060
070

I
I

I
I
I
I
I
I
I
I
I

Y N Termination Code 96?

Re p lac eRe a d - ~.J r i t e - S e r v 0
page 2-31).

I
I
I

Replace Supply Motor/Tach Assembly~

T
1

I
I

~10 d u 1 e

(S e e Not e 3 0 n

Replace Take-up Motor/Tach Assembly.

../

1-57

FAULT CODE TROUBLESHOOTING PROCEDURE 0050

FAULT CODE 50

FAULT CODE 50
Assumption:

TU80 displays Fault Code 50 as a result
Read-Write-Servo Module Health Check fault.
NOTE

Following any corrective action, the
unit should be powered off and on again.
010

020

030

I
I

N Sub-Fault Code 06 or 07?

RE' P 1 ace Re 8 d - ~v r i t e - S e r v 0 Hod u 1 e (S e e Not e 3

page 2-31).
Replace Formatter-Control Module.

1-58

0 n

FAULT CODEfROUBLESHOOTING PROCEOU~E 0051

FAULT CODE 51

FAULT CODE 51
Assumption:

TU80 displays
Check.

Fault Code 51 during Power-On Health

A possible cause of this fault is that the write
enable jumper on the Read-Wr i te-Servo Module, \-vhich
protects the contents of the back-up memory, has
been left in the "STORE" position.
Should this
have
occurred,
the
back-up
memory
shoul.d
be
re-initialized
by
executing
Field
Service
Diagnostic Test 37.
NOTE
Following any corrective action,
the
u nit s h 0 u 1 d be p 0 ~J ere d 0 f fan d po \-v ere d
on again.

010

Replace

Read-~..Jrite-Servo

t10dule (See Note 3, page 3-21).

1-59

FAULf CODE TROUBLESHOOTING PROCEDURE 0052

FAULT CODE 52

FAULT CODE 52
Assumption:

TU80 displays Fault Code 52 as a result of a radius
calculation fault.
A possible cause of
this
fault
is
that BOT
reflective marker
is not positioned correctly.
ANSII Standard X3.39 specifies that the BOT marker
should be placed from 14 feet to 18 feet from the
physical beginning of tape.

NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010
020
030
040

050
060
070
080

I
I
I
I
I
I
I
I
I
I
I
I
I

Check BOT marker position or try a new tape.

N Without tape threaded, execute Diagnostic Test 63.
I Termination Code 98?

I
Y

I
I
I

T e r In ina t ion

Cod e 9 6 ?

Remove tape reel and clean hub pads.

I
!
I
I

Rep lac e Re a d -~.J r i t e - S e r v 0 Ho d u 1 e ( See Not e 3 on
page 2-31).

T I

Replace Supply Motor/Tach Assembly.
Replace Supply Reel Hub Assembly.

Replace Take-up Motor/Tach Assembly.

1-60

FAULT CODE TROUBLESHOOTING PROCEDURE 0053

FAULT CODE 53

FAULT CODE 53
Assumption:

TU80 displays Fault Code 53 as a result of a radius
calculation arithmetic error.
NOTE
action,
Following
any
corrective
Operator Diagnostic Test Ot should be
executed.

010

Replace

Read-~.Jrite-Servo

Hodule (See Note 3, page 2-31).

1-61

FAULT CODE TROUBLESHOOTING PROCEDURE 0054

FAULT CODE 54

FAULT CODE 54
Assumption:

TU80 displays Fault Code 54 as a result of an erase
current fault.

NOTE
action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.
010
020

030
040

I
I

N Sub-Fault Code 10?

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

Ensure leads are correctly connected to the erase head
with black lead to the back and white to the front.
Replace Read-Write Head Assembly.

1-62

FAULT COOt: TROUBLESHOOTING PROCti:OUR£ 0055

FAULT CODE 55

FAULT CODE 55
Assumption:

TU80 displays Fault Code 55 as a result of the
Read-Write-Servo microprocessor timing out during a
H. e \.J i n d 0 r Loa d - Re \J i n d 0 per a t ion .
NOTE
Following
any
corrective
action,
Operator Diagnost ic Test 01 should be
executed.

010

Replace Read-Write-Servo Module (See Note 3, page 2-31).

1-63

FAULT CODE TROUBLESHOOTING PROCEDURE 0056

FAULT CODE 56

FAULT CODE 56
Assumption:

TU80 displays Fault Code 56 as
communication
problem
between
microprocessors.

a result
the
two

of a
TU80

NOTE
Following any corrective action, device
DC power should be turned off and then
turned on, followed by the execution of
Operator Diagnostic Test 01.
010

Ensure that Formatter Control and Read-Write-Servo
Modules are firmly connected.

020

Ensure that the DC power connector is firmly connected to
Read-Write-Servo Module.

030

Replace Read~Write-Servo Module (See Note 3, page 2-31).

040

I
I

Replace Formatter Control Module.

1-64

FAULT CODE TROUBLESHOOTING PROCEDURE 0057

FAULT CODE 57

FAULT CODE 57
Assumption:

TU80 displays Fault Code 57 as a result of the
Formatter-Control Microprocessor not detecting the
correct
response
from
the
Rea d - ~~ r i t e - S e r v 0
Microprocessor.
NOTE

action,
Following
any
corrective
Operator Diagnostic Test 01 should be
executed.

010

I
I

020

030

Ensure that Formatter-Control and Read-Write-Servo
Modules are firmly connected.
Replace Read-Write-Servo Nodule (See Note 3, page 2-31).
Replace Formatter Control Module.

1-65

FAULT CODE TROUBLESHOOTING PROCEDURE 0058

FAULT CODE 58

FAULT CODE 58
Assumption:

TU80 displays Fault Code 58 during Power-On due to
a
failure
in
the
functional
operation
of
Formatter-Control Module.

NOTE
Following any corr~ctive action, the
tr ansport should be powered off and on
again.
010

Replace Formatter-Control Module.

1-66

FAULT CODE TROU8LESHOOTING PROC~DURE 0059

FAULT CODE 59

FAULT CODe 59
Assumption:

displays Fault Code 59 as the result of a
Formatter-Control
PROM
Checksum
Error
being
detected during Power-On Health Check.

TUBO

NOTE
Following any corrective action,
transport should be powered off
powered on again.

020

Replace Formatter-Control Module.

1-67

the
and

FAULT CODE TROUBLESHOOTING PROCEDURE 0060

FAULT CODE 60

FAULT COD~~ 60
Assumption:

TU80 displays Fault Code 60 as the result of a
functional operator
panel
switch
being
closed
during Power-On Health Check.
This fault can also be generated if any of the
LOAD/REWIND, UNLOAD, ON-LINE or RESET switches are
depressed for 15 seconds during the Power-On Health
Check.
NOTE
Following any corrective action,
transport should be powered off
powered on again.

010
020
030

I
I

the
and

Check control panel functional switches and repeat the
Power-on Health Check.
Replace Control Panel Assembly.
Replace Formatter-Control Module.

1-68

FAULT CODE TROUBLESHOOTING PROCEDUJE 0061

FAULT CODE 61

FAULT CODE 61
Assumption:

TU80 displays Fault Code 61 as the result of a
diagnostic control panel switch being closed during
Power-On Health Check.
Th i s fa u 1 tea n a 1 sob e g en era ted i fan y 0 f the
Tt: ST ST EP,C t: ,or E XECUT E s \-/ i t c h e s are d e pre sse d
for 15 seconds during the Power-On Health Chec;k.
Should this fault occur, normal on-line operation
of the TU80 is available after pressing the Reset
sV/itch.
However, the use of TU80 diagnostics will
not be made available.
J

NOTE
Following any corrective action,
transport should be powered off
powered on again.

010

I
I

020

030

the
and

Check control panel diagnostic switches and repeat the
Power-on Health Check.
Replace Control Panel Assembly.
Replace Formatter-Control Module.

1-69

FAULT CODE TROUBLESHOOTING PROCEDURE

FAULT CODE 70/71

FAULT CODE 70/71 - INVALID OPERATOR SEQUENCE
Assumption:

TU80 displays Fault Code 70/71 as a result of tests
being run in improper sequence.
Refer to procedures for test being run.

1-70

FUNCTIONAL TROUBLESHOOTING PROCt:DUR£ 1001
PO~JER-ON

POl~ER-ON

1001-1

100.l

This Power-On/Installation Procedure is for the isolation of AC
po \l e r f a u 1 t s .
The transport's AC circuit breaker is turned off
and the TU80 is plugged into a "live" AC supply of
the correct voltage.

Assumption:

NOTE

Following
any
corrective
action,
r e con n e c tan y ass em b lie s t hat :n a y h d ve
been
disconnected
and
restart
this
procedure with circuit breaker turned off.
010
020

030
040
050
060
070
080
090
100

Y N Turn Power Switch (circuit breaker) ON.

I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I

breaker remain on?

I
I
I

Y N

Does circuit

Disconnect cooling fan cable from power supply.
Turn circuit breaker ON. Does circuit breaker
remain on?
Replace Power Supply Assembly.

Replace Cooling Fan Assembly.

Is the LOGIC-OFF LED on control panel illuminated?

T
I

Y N

2 2
A B

Is the LOGIC-ON LED on control panel illuminated?

Y N

I
I
I
I
I
I
I
I
I
I

I
I

Press LOGIC-ON switch. Does LOGIC-ON LED
illuminate and stay illuminated?

Y N Is cooling fan operating?

I
I
I
I
I
I
I

Ensure AC supply cable is plugged into Power
Supply Assembly.

Ensure that AC supplied to TU80 is "live" and
the correct voltage for the unit.

I
I

222

C D E

1-71

POltJER-ON 1001-2
PUWER-ON 1001 (Cont'd)

110
120
130

I
I
I
I
I
I
I

150

160
170
180

I
I
I
I

BCD
1
1 1

I
I
I
I
I
I
I
I

T
I
I
I
I
I
I
I

123

I
I
I
I
I

E
1

Replace Power Supply Assembly.

Ensure control panel cable is plugged into
Formatter-Control Module.

Ensure logic cable between power supply and
Formatter-Control Module firmly connected at
each end.

Replace Control Panel Assembly.

I
I

I
I
I

Is cooling fan operating?
Replace Cooling Fan Assembly.
Replace Power Supply Assembly.

Go to Functional Troubleshooting Procedure 1002.

1-72

FUNCTIONAL TROUBLESHOOTING PROCE:DURE 1002

LOGIC-ON 1002-1

LOGIC-ON 1002
Tnis Logic-On Procedure is for the isolation of DC power faults.
The transport's AC circuit breaker is turned on,
the LOGIC-OFF LED is illuminated and the cooling
fan is operating.

Assumption:

NOTE
Following any corrective action, reconnect
any
assemblies
that
may
have
been
disconnected and restart this procedure.
010

015

DC Cable harness is firmly connected to the
I 1I Ensure
underside of the Power Supply.

020

030

I
I
I

I
I
I
I
I
I

I
I

Does LOGIC-ON

Y N Disconnect DC supply cable from Power Amplifier
I I Module. Press LOGIC-ON switch. Does LOGIC-ON LED
I I illuminate and stay illuminated?

I
I

040
050

I
I
I
I
I
I
I
I

I
I
I
I

Reconnect DC supply cable to Power Amplifier
Mod u le. Disconnec t DC supply cab Ie from
Formatter-Control Module and Read-Write-Servo
Module. Press LOGIC-ON switch. Does LOGIC-ON
LED illuminate and stay illuminated?
Replace Power Supply Assembly.
Replace Control Panel Assembly.

Y N Remove Read-Write-Servo Module and reconnect DC

060

070

Press LOGIC-ON switch on control panel.
LED illuminate and stay illuminated?

I
I
I
I

I
I
I
I
I
I

222
ABC

I
I
I
I

supply cable to Formatter-Control Module. Press
LOGIC-ON switch. Does LOGIC-ON LED illuminate
and s t a y i 11 um ina ted?
Replace Formatter-Control Module.

2
D

1-73

LOGIC-ON 1002-2
LOGIC-ON 1002 (Cont'd)

A
1

080
090
100
110
120

130
140
150
160
170
180
190
200
210
220
L30

240

I
I
I
I
I
I
I
I

C
1

o
1

I
I
I

Replace Read-Write-Servo Module (See Note 3 on
page 2-31).

T T
I
I

Replace Power Supply Assembly.

Replace Power Amplifier Module.

I
I
I
I

Is the LOGIC-OFF L~D illuminated?

I
I
I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I
I

I
I
I

I
I
I
I

T I
I
I
I
I

I
I
I
I
I
I
I

I
I

I
I
I
I
I
I
I
I
I

I
I
I
I
I
I

Is the two-digit display blank and FILE PROT LED
illuminated and RESET, ON-LINE, and DIAGNOSTICS
LEOs all extinguished?

I
I
I
I
I
I

Are the RESET, ON-LINE, and DIAGNOSTICS LEOs all
illuminated?

I
I
I
I
I
I
I
I
I
I
I
I

I
I
I
I
I

I
I

I
I
I
I
I
I

I
I

Wait for 15 seconds.
extinguished?

I
I
I
I

I
I

Is the display blank?

Is RESET LED

Is Fault Code 50 or 51 or 56 or 58 or
59 or 60 or 61 displayed?
Replace Formatter-Control Module.

Go to the appropriate troubleshooting
procedure for the displayed fault code.

Is FILE PROT LED illuminated?
Replace Control Panel Assembly.
Replace Read-Write-Servo Module (See Note 3
on page 2-31).
Replace Formatter-Control Module.

Replace Power Supply Assembly.

Go to Functional Troubleshooting Procedure 1003.

1-74

FUNCTIONAL TROUBLESHOOTING PROCt:DURE 1003

LOAD/TEST 1003-1

LOAD/TEST 1003
This procedure is for detection/isolation of operational faults.
Assumption:

The transport is powered on with the LOGIC-ON LED
pressed,
the
LOGIC-OFF
LED
extinguished,
the
LOGIC-ON
LED
illuminated,
the
FlLE
PROT
LED
illuminated, and the display blank.
NOTE
Following any corrective action,
procedure should be restarted.

010
020
030

I
I
I
I
I

Is 01 displayed?

050

I
I

070

080
090
100

I
I

Replace Control Panel Assembly.
Replace Formatter-Control Module.

060

Thread a write enabled tape and close the top cover.
Press TEST switch. Does DIAGNOSTICS LED illuminate?

040

this

Replace Control Panel Assembly.

Replace Formatter-Control Hodule.

I
I

Press EXECUTE switch and observe LEDs and display of
control panel. Does display sequence from 00 to 11
to 22 to 99 without any missing segments? And while
display is sequencing, are ON-LINE and RESET LEDs both
illuminated?

Replace Control Panel Assembly.

I
I
I
I
I
I

I
I

Replace Formatter-Control Nodule.

I
I

Does Operator Diagnostic Test 01 terminate
displaying OO?

110

I
I

120

Go the specific Fault Code Troubleshooting

T Procedure for the displayed fault code.
I

Is the BOT LED extinguished?

1-75

LOAD/TEST 1003-2
LOAD/TEST 1003 (Cont'd)

A B
1
130

140
150
160
170

180
190
200
210
220
230
240

250

260
270
280

290
300

I
I
I
I
I

Replace Formatter-Control Module.
Replace Control Panel Assembly.

Y N Press the RESET switch.

I
I
I
I
I

Is the display blank?

Replace Control Panel Assembly.
Replace Formatter-Control Module.

Y N fhread tape and close the top cover. Press LOAD
I I switch. Does the transport load tape?

I
I
I
I
I
I
I
I
I
I

I
I
I
I
I

,
1,

Fault Code displayed?
Replace Control Panel Assembly.
Replace Formatter-Control Module.

Go to the specific Fault Code Troubleshooting

T Procedure for displayed fault code.

I
I
I
I
I

Is BOT LED illuminated?
Replace Control Panel Assembly.
Replace Formatter-Control Module.

Y N Is FILE PROT LED extinguished?
I I

I
I

I
2

Replace Control Panel Assembly
Replace Formatter-Control Module.

Y N Press ON-LINE switch. Does ON-LINE LED illuminate?
I I
i 1 Replace Control Panel Assembly.

A B

1-76

LOAD/TEST 1003-3

LOAD/TEST 1003 (Cont'd)

A B
2 2

I
I
I

330
340
350
360
370
380
390
400
410
420
430

440
450
460

I
2

Replace Formatter-Control Module.

N Pre s s RES ET s \v i t c h f 0 11 ()l..J e d by UN LOA 0 s wit c h .

I
I
I
I
I
I
I
I
I
I
I

I
I

Does the transport unload lape?

Y N

I
I
I
I
I

Fault Code displayed?
Replace Control Panel Assembly.
Replace Formatter-Control Module.

Go to the specific Fault Code Troubleshooting
Procedure for the displayed fault code.

Y N While pressing CE switch, press TEST switch.
I I Is 00 displayed?

I
I
I
I
I

Replace Control Panel Assembly.
Replace Formatter-Control Module.

Y N Press STEP switch.

I
I
I
I
I

Is 01 displayed?
A~sembly.

Replace Control Panel

Replace Formatter-Control Module.

Y N Press RESET switch. Remove write permit ring from
I I reel and rethread tape. With the top cover open,
I I press LOAD switch. Is Fault Code 10 displayed?

I
I
I
I
I
I

Replace Top Cover Interlock Switch Assembly.
Replace Read-WrIte-Servo Module (See Note 3 on
page 2-31).

Y N Press RESET switch and close the top cover.

I
I

LOAD switch.

Press
Does transport load tape successfully?

1-77

LOAD/TEsr 1003-4
LOAD/TEST 1003 (Cont'd)

470
480
490
500
510
520

I
I
I
I

Go to the specific Fault Code Troubleshooting
Procedure for the displayed fault.

Is FIL£ PROT LEO illuminated?

I
I
I
I
I
I
I
I

Replace File Protect Sensor Assembly.

Re p lac eRe ad - ~J r i t e - S e r v 0 Ho d u 1 e ( See Not e 3 0 n
page 2-31).

Replace Supply Hub Assembly.

I
I

Unload tape; the functional troubleshooting is completed
without finding any (aults.
HOTE

Procedures 1001 thru 1003 check out the
functional operation of the transport,
including ancilliary sensors, which the
microprocessors
cannot
fault
detect
without manual operation and
visual
feedback.

1-78

Section 2 - FIELD SERVICE DIAGNOSTIC TEST DESCRIPTIONS
---------------_._---------_._--

SCOP£
2.1
Information contained in this appendix
all Field Service Diagnostic Tests.

includes descriptions of

Those tests referenced by the Removal/Replacement Procedures and
Fault Code Troubleshooting Procedures (Tests 1, 2, 3, 18, 31,
37, 43, 44, and 48) in Section 1, can be referred to by all
levels of maintenance personnel.
Tests which are not referenced in Section 1 of this manual are
to be used only by second level field service personnel
(Technical Specialists) who have been instructed in the use and
limitations of these tests.

"'-

2-1

DIAGNOSTIC TESTS

OPERATOR/FIELD SERVICE DIAGNOSTIC TESTS
TEST NO.
01

DESCRIPTIOl~

Functional Fault Detection Diagnostic

FIELD SERVICE DIAGNOSTIC TESTS
TEST NO.

OPTION

DESCRIPTION

Ol~ -09

Tension Fault Isolation Diagnostic
Velocity Fault Isolation Diagnostic
Reserved

10
11
12
13
14

25
25
25
25
25

15
16
17
18
19

100
100
100
100

Formatter Internal Fault Detection
Diagnostic

Write 2K Byte Records a t 25 ips toE OT
(At EOT, Rewind to BOT. )
Read at 25 ips to EOT (At EDT, Re~vind
to BOT.)
Write 256 Byte Records at 100 ips to
EDT (At EOT, Rewind to BOT.)
Read at 100 ips to EOT (At EOT, Rewind
to BOT.)

02
03

22
23

ips
ips
ips
ips
ips

Forward to EOT
Reverse to BOT
Forward Ramps to EOT
Reverse Ramps to BOT
Repositioning

ips
ips
ips
ips
100 ips

Forward Ramps to EDT
Reverse Ramps to BOT
Repositioning
For\'Jard to EOT
Reverse to BOT

L
L
L
L
L
L
L
L
L
L

B
B

25-27

Reserved

Perform Command Stack entered by
Diagnostic 97 at 25 IPS Start/Stop
Perform Command Stack entered by
Diagnostic 97 at 100 IPS Thrashing

Check Read Amplitudes at 25 and 100 ips
to be within tolerance of 0.8 volt.

29
30

2-2

FIELD SERVICE DIAGNOSTIC TESTS (Cont'd)
TEST NO.

33
34

39
40

DESCRIPTION

OPTION

Determine EGC Gains at 25 and 100 ips
and store gains in Backup Memory.
Then check read amplitudes at 25 and
lOa ips t 0 b e \J i t h i n t 0 1 era n ceo f
0.1 volt.

Check Read Amplitudes at 25 and 100 ips
with pre-recorded all lIs tape with
tolerance of 0.3 volt.

Determine EGC Gains at 25 ips and
store gains in Backup Memory.
Determine EGC Gains at 100 ips and
store gains in Backup Memory.
Determine Velocity Servo Correction
Multiplier and store multiplier 1n
Backup Memory.
Apply approximately 8 ounce tension by
pulsing supply reel with take-up
reel in Stoplock.
Write all lIs to EOT at 25 ips
(At EDT, Rewind to BOT.)
Write alII's to EDT at 100 ips
(At EaT, Rewind to BOT.)

44
45
46
47
48

Stoplock Take-up Reel
Enable Tension Servo
Turn-on Pump
Fast Search Forward For EDT
EGC DAC Scope Loop
Velocity DAC Scope Loop
R/W/S Microprocessor Outputs Scope Loop
Set Up Pump Power-Down Timer

Reserved

25 IPS Forward Streaming Ramps to EOT
25 IPS Reverse Streaming Ramps to BOT

52-60

Reserved

Take-up Motor and Power Amp Marginal
Fault Detection
Take-Up Fine-Line Tach Fault Detection

63-90

Reserved

41
42

2-3

x
X
X

x
B
B
X

X
X
X

X
X

L
L

X
X

FIELD SERVICE DIAGNOSTIC TESTS (Cont'd)
TEST NO"

OPTION

DESCRIPTION

Functional Fault Detection (Same as
Operator Diagnostic Test 01
except: a) Will start in Loaded
or Unloaded condition, b) Will
not unload upon completion, and
c) bypass EGC test.)

92-96

Reserved

Read/Write Command Stack Generation
Diagnostic

OPTION KEY

X
L
B

Do not use any options.
Test will loop. Do not use any options.
Field Service Personnel may use options.
NOTE

Refer to paragraph l.3.4.c
initializaLion procedure.

aa
01
02

for

option

II a Ito f

rea d 0 r \v r i tee r r 0 r sex c e e d 1 i rn i t s p e c i fie d ,
Halt on cornpl.etion of test (Default Option).
Loop on test, Halt if read or write errors exceed
limit specified on any given pass.
Loop on test, bypass read or write error halts.
NOTE
Option of halting or bypassing errors
only exisLs [or read/write type errors;
all other errors will cause test to
halt, with the appropriate fault code
displayed,
regardless
of
the option
selected.

2-4

TEST 01:

FUNCTIONAL FAULT DETECTION TEST

TEST REQUIREMENT:

A \vrite enabled
scratch
tape
should
threaded, but NOT loaded (untensioned).

DESCRIPTION:

Test 01 performs various functions normally
performed during functional operations.
Uni~
halts with appropriate
fault
code
if
a
functional fault occurs.

TEST SEQUENCE:
a.

Illuminate ONLINE and RESli2r LEOs.
Increment display from
Extinguish ONLINE and RESET LEDs. Display 01.

00 to 99.

Load tape.

Check read amplitudes at

Write 100 blocks at 25 IPS start/stop (see NOTE 1).

Space reverse, era s e, and \J r i t e f i 1 e mar k ( c h e c k for f i l e
mark detect).
Space reverse and check for file mark
detect.
Read forward and again check for file mark
detect.

Re ad rever s e 100
start/stop mode.

Read forward 2 blocks at 25 IPS start/stop.

Check gap lengths twice.

Read forward 94 blocks at 25 IPS start/stop.

Repeat steps d. to i. at 25 IPS continuous mode.

Repeat steps d. to i. at 100 IPS streaming mode.

Change speed from high to low and then low to high.

Write 10 blOCkS at 100 IPS "thrashing" (see NOTE 2).

Space reverse 10 blocks at 100 IPS "thrashing

Re ad for war d lOb 10 c k sat 100 IPS

Rewind.

Speed mode change.

Read forward 200 blocks at 100 IPS streaming.
file mark detect.)

lO~J

b 10 c k s

2-5

and high speeds.

pre vi 0 u sly

\,,1

Rewind.

r itt e nat

IPS

ll
•

t h r ash in gil.

(Check for

TEST 01:

(Cont'd)

Wr i te to EOT at 100 IPS streaming (s ee NOTE 2) .

Space reverse 200 blocks at 100 IPS streaming.

Read forward 10 blocks at 100 IPS "thrashing".

Read forward 20 blocks at 25 IPS start/stop.

Read reverse 20 blocks at 25 IPS start/stop

Rewind/Unload.

wr itt en a t 2 5 IPS are 2 K by t e s ~" i t h fir s t
256 bytes "random" and remaining bytes of fixed pattern.

Da tab lac k s

NOT E 2:

Da tab .1. 0 c k
zeros.

NOT E.

\.J

r itt e n

10 a IPS

are

2 56

by t e s

0 f

POSSIBLE TERMINATION CODES:
00
01
02
03

04
05
06
07
08
10

Test Successful
Read Envelope Fault
Read Amplitude Range Fault
ID Check
- Low Speed Write Error
- Low Speed Read Error
- High Speed Write Error
- High Speed Read Error
- Noise In IBG
to 69 - Refer to respective Troubleshooting Procedures

2-6

a 11

TEST 02:

TENSION FAULT ISOLATION

TEST REQUIREMENT:

Tape should be
(untensioned) .

threaded,

but

NOT

loaded

Valid fault code displayed in operator panel.
NOTE
run only
if,
during
Test 02 will
01,
one of
execution of Test
the
following codes appears in the operator
panel display: 22, 24, 26, 30, 31, 36.
Test will not run unless conditions above are
met.
TEST DESCRIPTION:

Test 02 is an extens.ion of Test 01.
isolates servo faults by checking
assemblies of the TU80.

Test 02
various

TEST SEQUENCE:
a.

Verify that top cover is closed and tape is not loaded.

Verify
EGC
operational.

DAC
of
Read/Write/Servo
Module
If not, display Termination Code 80.

Verify file (supply) reel power amp is operational.
not, display Termination Code 81.

Verify take-up reel (TU) power amp
not, display Termination Code 82.

Verify Demand Velocity DAC of Read/Write/Servo Module is
operational.
If not, display Termination Code 83.

Mo vet a k e - u pre e 1 s I i g h t 1 yin for war d d ire c t ion.
Ch e c k
for correct count of quarter-tach pulses.
If incorrect,
display Termination Code 84.

Repeat step f.
in the reverse direction.
Termination Code 84 if tach count is incorrect.

Verify velocity feedback loop of Read/Write/Servo Module
is operational by putting take-up motor in stoplock
mode, and monitoring forward and reverse quarter-tachs.
Display Termination Code 85 if any fault is detected.

2-7

is operational.

Display

TEST 02:

(Cont' d)

Ver i fy
tha t
tens ion
campara tors
on Read/Wr i te/Servo
Module are operational.
Vary tension offsets and monitor
status of tension level status lines.
If any fault is
detected, display Termination Code 87.

With pneumatic pump off, zero tension offsets.
occurs, display Termination Code 97.

Turn on pneumatic pump.
If take-up sensor detects at
least 2.0 ounces of tension, display Termination CodE~
90.
If file sensor detects at least 2.0 ounces of
tension, display Termination Code 89.

Enable take-up servo.
Move take-up reel from 0 IPS to 6
IPS in forward direction.

If both sensors do not detect at least 2.0 ounces of
tension within 15 seconds, display Termination Code 91.

If, during this 15 seconds, the file sensor does not detect
2.0 ounces of tension within 100 milliseconds after take-up
sensor, display Termination Code 74.
If take-up sensor
does not detect 2.0 ounces within 100 milliseconds after
file sensor, display Termination Code 72.

Mo v e f i 1 ere e 1 s low 1 yin rever sed ire c t ion wh i 1 e t a k e - u p
reel is moving forward at 6 IPS.
If neither sensor detects
at least 16 ounces of tension within 500 milliseconds,
display Termination Code 92.

If, during this 500 milliseconds, the file sensor does not
detect 16 ounces of tens ion wi thin 100 milliseconds after
t a k e -up s en s 0 r, dis Play T e r min a t i on Cod e 7 5 •
I f ta k e - u p
sensor does not detect 16 ounces of tension 'Vlithin 100
milliseconds after file sensor, display Termination Code 73.

r .

Stop moving file reel in reverse direction.
If
detected o~ both sensors is not within limits
milliseconds, display Termination Code 98.

Stop reel motion.
is successful.

Display Fault Code 00 to

tension
in 100

indicate test

POSSIBLE TERMINATION CODES:
00 - Test Successful
10 to 69 - Refer to respective Troubleshooting Procedure

2-8

fault

TEST 02:

(Cont' d)

POSSIBLE

TER~1INAI'ION

CODES:

(Cont' d)

70
71
72
73
74
75
80
81
82
83

- Invalid Operator Sequence (See Test Req'mts on page 2-7.)
- Invalid Operator Sequence (Tape Loaded Fault)
- TU Sensor Fault 1
- TU Sensor Fault 2
- File Sensor Fault 1
- File Sensor Fault 2
- EGC DAC Fault
- File Power Amp fault
- TU Power Amp Fault
- Demand Velocity DAC fault
84 - TU Motor/Tach Fault
85 - Velocity Feedback Loop Fault
86 - TU Comparator Fault
87 - File Comparator Fault
89 - File Sensor - 0 Fault
90 - TU Sensor - 0 Fault
91 - Pump Failure Fault
92 - Filter/Regulator, Pump, R/W/S Module Fault
97 - R/W/S Modu1e, Sensor Intermittent Fault
9 8 - R/ ~-J / S i'1o d u 1 e, Power Am p Fa u 1 t

2-9

TEST 03:

VELOCITY FAULT ISOLATION

TEST REQUIREMENT:

Tape should not be threaded.
Test 03 should not be used unless Test 01
d ire c t s i t sus e .
Th i s t est may fa i 1 i f run
Stand-alone.

TEST DESCRIPTION:

Test 03 isolates velocity servo faults by
check ing the take-up motor / tach assembly and
the velocity servo loop.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is absent.

Ramp up to 4 IPS.

Check if distance bet\veen two consecutive quarter
is within tolerable limits.

If, after five tries, at least once, the distance between
two consecutive quarter tachs is within limits, go to
step f.

Display Termination Code 96.

Check that the distance between all consecutive quarter
tachs is within tolerable limits.

If distance between any two consecutive quarter tachs is
not within limits, report fault, otherwise, go to step i.

Re pea t s t e p s e . and f.
1 f the err 0 I'
times, displny Termination Code 98.

Apply diagno~tic 1 ines to move take-up motor in forward
direction from a La 100 lPS, and measure time it requires
to ramp-up. Stop take-up motor.

Calculate motor constant from this data.

If motor constant is within range, go to step e.
If
motor constant is out of range the first time, repeat
steps i. and j. Otherwise, display Termination Code 84.

Apply full current to move take-up motor in forward
direction from 0 to 100 IPS, and measure time it requires
to ramp-up. Stop take-up motor.

If power amp is not c~pable of delivering full current in
forward direction, flag a fault, otherwise, go to step o.

2-10

de t e c ted

tachs

f i ve

TEST 03:

(Cont'd)

If fault is the first time, repeat steps
otherwise, display Termination Code 82.

Apply full current to move take-up motor in reverse
direction from 0 to 100 IPS, and measure time it requires
to ramp-up. Stop take-up motor.

If power amp is not capable of delivering full current in
reverse direction~ flag a fault, otherwise, go to step r.

If fault.: is the first time, repeal steps
otherwise, display Termination Code 82.

Display Termination
completion of test.

Code

indicate

and

- Test Is Successful
to 69 - Refer to respective Troubleshooting Procedure.
- Take-Up Power Amp Fault
- Take-Up Motor/Tach Fault
- Tape Present Fault
Formatter Interrupt received while test in progress.
- Servo Loop Fault
- Take-up Motor/Tach Fault

2-11

p.,

successful

POSSIBLE TERMINATION CODES:
00
10
82
84
94
95
96
98

m.,

TEST 10:

FORWARD 25 IPS CONTINUOUS

TEST R£QU IREt'1ENT:

Tape s hou Id bel oad ed .

TEST DESCRIPTION:

Test
10
exercises
the
transport
in
a
continuous mode at 25 IPS in the forward
direction.
When EOT is detected, tape is
stopped
and
25
IPS
continuous
mode
is
ex e cut e din the rever sed ire c t ion.
Wh e n BOT
is
detected,
the
routine
starts
again.
Ma n u a l i n t e r v e n t ion i s r e qui red t o t e r min ate
the test.

TEST SEQUENCE:
B.

Check if the top cover is closed and tape is loaded.

Run forward continuously 25 IPS until EOT is detected.

Stop and run reverse continuously at 25 IPS until BOT is
detected.

"d.

Stop motion and go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2 -12

TEST 11:

REVERSE 25 IPS CONTINUOUS

TEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Tes t
11
exerc ises
the
transpor t
in
a
continuous mode at 25 IPS in the reverse
direction.
When BOT is detected, tape is
stopped
and
25
IPS
continuous
mode
is
ex e cut e din the for war d d ire c t ion.
Wh en EDT
is
detected,
the
routine
starts
again.
Ma n u a l i n t e r v en t ion is r e qui red t o t e r min ate
the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run reverse continuously 25 IPS until BOT is detected.

Stop and run forward continuously at 25 IPS until EDT is
detected.

Stop motion and go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-13

TEST 12:

FORWARD 25 IPS RAMPS

TeST R~QUIREME.NT:

Tape should be loaded.

TEST DESCRIPTION:

Test
12
exercises
the
transport
in
CI
start/stop mode at 25 IPS in the forward
direction. When EOT is detected, the same 2~)
IPS
start/stop mode
is
executed
in
the
reverse direction. When BOT is detected, the
routine starts again.
Manual intervention 1S
required to terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run forward at 25 IPS for 120 ms.

Stop and pause for 120 ms.

Repeat steps b. and c. until EOT is detected.

Run reverse at 25 IPS for 120 ms.

Stop and pause for 120 ms.

Repeat steps e. and f. until BOT is detected.

Go to step b.

PO S SIB LET ElUI I NAT [ 0 NCO DES :
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-14

TEST 13:

REVERSE 25 IPS RAMPS

TEST REQUIREHENT:

Tape should be loaded.

TEST DESCRIPTION:

Test
13
exercises
the
transport
in
a
start/stop mode at 25 IPS in the reverse
d ire c t ion. Wh e n BOT i s de t e c ted, the sam e 2 5
IPS
start/stop mode
is
executed
in
the
forward direction. t-Jhen EOT is detected, the
routine starts again.
Manual intervention is
required to terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run reverse at 25 IPS for L20 ms.

Stop and pause for 120 ms.

Repeat steps b. and c. until BOT is detected.

Run forward at 25 IPS for 120 ms.

Stop and pause for 120 ms.

Repeat steps

Go to' step b.

and f. until EDT is detected.

POSSIBLE TERMINATION CODES:

10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-15

TEST 14:

25 IPS REPOSITIONING

'fEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Test 14 is a repositioning routine at 25
IPS.
It repositions the tape in the forward
direction.
When
EaT
is
detected,
it
repositions
the
tape
in
the
reverse
direction.
When BOT is detected, the routine
starts
again.
Manual
intervention
is
required t6 terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run forward at 25 IPS for 100 ms.

Run reverse at 25 IPS for 30 ms.

Repeat steps b. and c. until EOT is detected.

Run forward at 25 IPS for 30 ms.

Run reverse at 25 IPS for 100 ms.

Repeat steps e. and f. until BOT is detected.

Go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-16

TEST 15:

FORWARD 100 IPS RAMPS

TEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Test
15
exercises
the
transport
in
a
start/stop mode at 100 IPS in the forward
direction.
When EOT is detected, the same
100 IPS start/stop mode is executed in the
reverse direction. \vhen BOT is detected, the
routine starts again.
Manual intervention is
required to terminate the test.

TEST SEQUENCE:
a.

Check i f the top cover is closed a nrl tape is loaded.

Run forward at 100 IPS [or 500 m8.

Stop and Pause for 500 ms.

Repeat steps b. and c . until EOT is detected.

Run reverse at 100 IPS for 500 ms.

Stop and pause for 500 ms.

Repeat steps e . and f . until

Go to step b.

BOT

is detected.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2 -17

TEST 16:

REVERSE 100 IPS RAMPS

TEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Test
16
exercises
the
transport
in
a
s tar t / s top ill 0 d e a t La a IPS i nth ere v e r s e
direction.
When BOT is detected, the same
100 IPS start/stop mode is executed in the
forward direction. When EOT is detected, the
routine starts again.
Manual intervention is
required to terminate the test.

TEST SEQUENCE:
a.

Check i f the top cover is closed and tape is loaded.

Run reverse at 100 IPS for 500 ms.

Stop and Pause for 500 ms.

Repeat steps b. and c . until BOT is detected.

Run reverse at lOa IPS for 500 ms.

f .

Stop and pause for 500 ms .

Repeat steps e . and f . until EOT is detected.

Go to step b.

POSSIBLE fERMINAfION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-18

TEST 17:

100 IPS REPOSITIONING

T p~ S r RE qUI REt IE NT:

Tap e s h 0 u 1 d beL 0 a d e c1 •

TEST DESCRIPTION:

Test 17 is a repositioning routine at 100
IPS.
It repositions the tape in the forward
direction.
When
EaT
is
detected,
it
repositions
the
tape
in
the
reverse
d ire c t ion.
Wh e n BOT i s de t e c ted, the r 0 uti n e
starts
again.
Manual
intervention
is
required to terminate the test.

TEST SEQUENCE:
a.

Cb ec i< 1 f

Run forward at 100 IPS for 1 second.

Run reverse at lOa IPS for 30 ms.

Repeat steps b. and c . until EOT is detected.

Run forward at lOO 1 PS [or 30 ms.

f •

Run reverse at 100 IPS for 1 second.

Repeat steps e. and f. until BOT is detected.

Go to step b.

the top cover is closed and tape is loaded.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-19

TEST 18:

FORWARD 100 IPS CONTINUOUS

TEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Tes t
18
exerc i ses
the
transpor t
in
a
continuous mode at 100 IPS in the forward
direction.
When EDT is detected, tape is
stopped
and
100
IPS
continuous
mode
is
executed in the reverse direction.
\~hen BOT
is
detected,
the
routine
starts
again.
Mallual intervention is required to terminate
the lest.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run forward continuously 100 IPS until EDT is detected.

Stop and run reverse continuously 3t 100 IPS until BOT is
detected.

Stop motion and go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-20

TEST 19:

l~EVERSE

100 IPS CONT I NUDUS

T EST R E QUI R EHEN T :

Tap e s 110 ul d bel 0 chi e d •

TEST DESCRIPTION:

Test
19
exercises
the
transport
in
a
continuous mode at LOO IPS in the reverse
direction.
Hhen BOT is detected,
tape is
stopped
and
100
IPS
continuous
mode
is
ex e cut e din the for \,j a r d d ire c t ion.
Hh e n E OT
is
detected,
the
routine
starts
again.
Ivia n u a l i n t e r v en t ion i s r e qui red t o t e r min ate
the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Run reverse continuously 100 IPS until BOT is detected.

Stop and run forward continuously at 100 IPS until EOT is
detected.

Stop motion and go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-21

TEST 20:

FORfvlATTER INTERNAL DIAGNOSTICS

TEST REQUIREHENT:

None.

TEST DESCRIPTION:

Test 20 checks out the internal hardtvare of
the
formatter.
It does
not
check host
interface or device interface hardware.

TEST SEQUENCE:
a.

Check out pr ogr amlnab le timer h ard\'la re.

Check out hardware used to write ID or file mark.

Check out hardware used to write or read a block of data.

Check out hardware used to detect dead tracks and correct
errors.

Check out hardware
operations.

used

for

high

POSSIBLE TE£Un NATION CODES:
00 - Test is Successful
58 - Formatter Internal Diagnostic Failure

2-22

speed

and

reverse

TEST 21:

25 IPS WRITE TO EOT

'fEST REQUIREMENT:

A write enabled scratch tape should be loaded.

TEST DESCRIPTION:

Test 21 writes 2K byte records, first 256
bytes of random data and then the remaining
bytes
of
fixed
data,
from
the
present
position of the tape to EOT at 25 IPS.
On
detection of EDT, it rewinds and positions at
BOf.
If a write error occurs,
the unit
performs Backspace, Erase, and attempts to
\'1 r i tea g a in.
I fIno r e t han f i vee 0 n sec uti ve
erases are required, the test terminates with
a write fault.
If 16 erases are required in
one complete pass, the test terminates VJith a
~Jrite
fault.
All
functional
checks
are
active throughout the test.

TEST SEQUENCE:
a.

Write 2K byte records at 25 IPS continuous to EDT.

Rewind to BOT.

POSSIBLE TERMINATION CODES:
00
03
04
10
70

- Test is successful
- ID Check
- Low Speed Write Error
to 69 - Refer to respective Troubleshooting Procedure.
- Invalid Operator Sequence (Tape Not Loaded Fault)

2-23

TEST 22:

25 IPS READ TO EDT

TEST REQUIREMENT:

A pre-written tape should be loaded.

TEST DESCRIPTION:

Test 22 reads any pre-written tape from
present tape position to EDT at 25 IPS.
Any
read error halts the test with a fault code.
All
functional
checks
are
active.
On
detection of EDT, it rewinds and positions at
BOT.

TEST SEQUENCE:
a.

Read records at 25 IPS continuous to EOT.

Rewind to BOT.

POSSIBLE TERMINATION CODES:
00 - Test is Successful
03 - 10 Check
05 - Low Speed Read Error
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-24

TEST 23:

100 IPS STREAHING WRITE TO EOI'

TEST REQUIREMENT:

A write enabled scratch tape should be loaded.

TeST DESCRIPTION:

Test 23 writes 256 byte records, all zeros
patterns, [rum present position of tape to
EOT at
100
IPS
in
streaming mode.
On
detection of EOT, it rewinds and positions at
BOT.
If a write error occurs,
the unit
performs Backspace, Erase, and attempts to
write again.
If more than five cOL1secutive
erases are required, the test terminates with
a write fault.
If 16 erases are required in
one complete pass, the test terminates with a
write
fault.
All
functionul
checks
are
active throughout the test.

TEST SEQUENCE:
a.

Write 256 byte records at 100 IPS streaming to EOT.

Rewind to BOT.

POSSIBLE TERMINATION CODES:
00
03
06
10
70

- Test is successful
- ID Check
- High Speed Write Error
to 69 - Refer to respective Troubleshooting Procedure.
- Invalid Operator Sequence (Tape Not Loaded Fault)

2-25

TEST

2L~:

100 IPS READ TO EDT

TEST REQUIREMENT:

A pre-written tape should be loaded.

TEST DESCRIPTION:

Test 24 reads any pre-written tape
from
present tape position to EOT at 100 IPS. Any
read error halts the test with a fault code.,
All
functional
checks
are
active.
On
detection of EOT, it rewinds and positions at
BOT.

TEST SEQUENCE:
a.

Read records at lOa IPS streaming to EOT.

Rewind to BOT.

POSSIBLE TERMINATION CODES:
.00 - Test is Successful

03
07
10
70

- ID Check
- High Speed Read Error
to 69 - Refer to respective Troubleshooting Procedure.
- Invalid Operator Sequence (Tape Not Loaded Fault)

2-26

TEST 28:

PERFORM COMMAND STACK AT 25 IPS START/STOP

T EST RE QUI REME NT :

TEST DESCRI PTION:

I f a ~J r i t e - t y p e 0 per a t ion i s
write enabled scratch tape
lc>adcd.

des ire d, a
should be

If a read-type operation is desired,
pre-recorded tape should be loaded.

::!

Te s t
28 per f or;:ns
the th ree-l eve 1 command
slack ent!2!red by Test 97.
If option 01. is
entered, the stack will be repeated until EOT
or BOT is detected.
If wr i te operation is
being performed upon an error, a Backspace,
Erase, and Rewrite is performed.
If read
operation
is
being
performed,
any
uncorrectable read error will cause the test
to fail with a read fault.
All functional
checks are active throughout the test.
Option 2 bypasses read and write errors as in
all read/write tests.

POSSIBLE TERMINATION CODES:
00 - Test is Successful
03 - ID Check
04 - Low Speed Write Error
05 - Low Speed Read Error
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-27

TEST 29:

PERFORH COMMAND STACK AT 100 IPS THRASHING

TEST REQUIREMENT:

TEST DESCRIPTION:

desired, a
should be

If a write-type operation is
write enabled scratch tape
loaded.

If
read-type operation is desired,
pre-recorded tape should be loaded.

Test 29 performs
the three-level com~and
stack entered by Test 97.
If option 01 is
entered, the stack will be repeated until EDT
or BOT is detected.
If write operation is
being performed upon an error, a Backspace,
Erase, and Rewr i te is per formed.
I f read
operation
is
being
performed,
any
uncorrectable read error will cause the test
to fail ~.vith a read fault.
All functional
checks are active throughout the test.
Option 2 bypasses read and write errors as in
all read/write tests.

POSSIBLE TERMINATION CODES:
00
03
06
07
10
70

- Test is Successful
- 10 Check
- High Speed Write error
- High Speed Read Error
to 69 - Refer to respective Troubleshooting Procedure
- Invalid Operator Sequence (Tape Not Loaded Fault)

2-28

TEST 30:

CHECK READ AMPL I rUDES
TOLERANCE OF + 0.8 VOLTS

AND

100

I PS

~JITH

TEST R£QUIREHENT:

Tape
should
be
loaded
and
not
protected, and should not be near EOT.

write

TEST DESCRIPTION:

Test 30 checks that read amplitudes at 25 and
100 IPS are 1.5 + 0.8 volts.
For 25 IPS, the
mlnimum
read
-amplifier
gain
value
is
determined
for
each
track,
such
that
peak-to-peak voltage at the analog test point
is 1.5 volts.
This generates an envelope
signal for that track.
If, a t the end of the
test, an envelope is not detected for any
track,
a
fault
is
teported.
The
gain
determined for each track is compared to
corresponding
gain
value
stored
in
the
back-up memory (determined by Test 31). If
the difference for any track is such, that it
causes an amplitude difference of 0.8 volts,
a
fault
is
reported.
All
options
are
available for the test.
The same operation
is carried out for 100 IPS.

TEST SEQUENCE:
a. Check if the top cover door is closed, tape is not wr i te
protected, tape is loaded and not at EDT.
b.

Calculate the minimum read gain values for all tracks for
25 IPS as described.

Display Fault Code 01 if an envelope is not detected in
track at the end of the test.

Display Fault Code 02 if the difference in gain, between
that determined and the corresponding value stored in the
back-up memory for any track, is such that it causes an
amplitude difference of 0.8 volts.

Execute steps b., c., and d. for 100 IPS.

Display Termination Code 00 if test is successful.

POSSIBLE TERMINATION CODES:
00 - Test Is Successful
01 - EGC Envelope Fault
02 - EGC Wear Tolerance Fault
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)
72 - Tape Write Protected Fault
77 - EOT On EGC Fault
•
NOTE: Test 30 is a part of Operator Test 01.

2-29

TEST 31:

SET UP AND CHECK READ AMPLITUDES AT 25 AND 100 IPS

TEST REQUIREMENT:

Tape
should
be
loaded
and
not
write
protected,
and
sbould
not
be
near
EaT.
Jumper to the back-up memory (on Read-WriteServo Module)
should be
in W4
("STOREtI)
position.

TEST DESCRIPTION:

Test
31
sets
up
and
checks
the
read
amplitudes at 25 and 100 IPS.
For 25 IPS, it
determines the minimum gain value for each
track, in the same manner as described in
Test 30, and stores them in the back-up
memory.
It again determines the minimum gain
value for each track and compares it to the
previously stored value.
If the difference
in gain between the two values for any track
is
such
that
it
causes
an
amplitude
difference
of
0.1
volts,
the
test
is
repeated.
Also, if any fault is detected
while deterffiining the minimum gain values,
the test is repeated.
If, after 5 attempts,
the operation is not successful, a fault is
reported.
The same operation is carried out for 100 IPS.

TEST SEQUENCE:
write

Check if the top cover is closed, tape is not
protected, tape is loaded, and tape is not at EDT.

Determine the minirnum gnin values for 25 IPS and store
them in the back-up memory. Report a fault if the jumper
on the back-up memory is not in the "STORE" position.

Determine the minimum gain values for 25 ips and compare
them with the previously stored values.
If, for any
track, the difference is such that it causes an amplitude
difference greater than 0.1 volts, the test is repeated.

If, while determining the minimum gain values in steps h.
and c., a fault is detected, the test is repeated.

If, after five tries, the test is still not successful,
terminate the test with Termination Code 78.

Execute steps b., c., and d. for 100 IPS.
If test is not
successful after five tries, display Termination Code 79.

Display Termination Code OO.if test is successful.

2-30

TEST 31:

(Cont'd)

POSSIBLE TERMINATION COOES:
00
10
70
72
78
79

- fest Is Successful
to 69 - Refer to respective Troubleshooting Procedure
- Invalid Operator Sequence (Tape Not Loaded Fault)
- Tape Write Prolected Fault
- EGC Low Speed Set-Up Failure
- EGC High Speed Set-Up Failure
99 - Attempt to Loop on Test

NOTE 1:

After completing the test, replace the jumper to the
bac k - up memory from the W4 (" STORE ") pas i t ion to the \-13
position before powering down the transport.

NOTE 2:

Loop on test option is not permitted with this test.

NOTE 3:

Make certain resistors R224 and R225 are moved from old
module to replacement module.
Move jumper plug at
location 13E on Read-Write-Servo Module from normal W3
to Test W4 - Store position.
With tape not threaded,
execute Field Service Tests 37 and 48. Load known good
quality write enabled tape.
Execute Field Service Test
18 to move tape a~l}ay from BOT.
Press RESET to stop
tape motion.
Execute Field Service Test 31.
After
test is complete (display 00), return jumper plug to W3
position.
~vith tape threaded, but not loaded,
execute
Operator Test 01.

2-31

TEST 32:

CHECK READ AMPLITUDES AT 25 AND 100 IPS

TEST REQUIREMENT:

Tape should be loaded and pre-vvritten
all l's, and should not be near EOT.

TEST DESCRIPTION:

Test 32 checks that read amplitudes at 25 and
100 IPS are 1.5 + 0.3 volts, with pre-written
tap e 0 f a l l l' s.
Th i s t est i s s i mil a r t 0
Test 30 except that it requires pre-written
tape and the tolerance value is + 0.3 volts
i. n s tea d
0 f
0 . 8 v0 1 t s .
A11 or t ion s
are
available [or the test.

POSSIBLE TERMINATION CODES:
00
01
02
10
70
77

- Test Is Successful
- EGC Envelope Fault
- EGC Wear Tolerance Fault
to 69 - Refer to respective Troubleshooting Procedure
- Invalid Operator Sequence (Tape Not Loaded Fault)
- EOT On EGC Fault

2-32

with

TEST 33:

SET UP READ AMPLITUDES AT 25 IPS

TEST REQUIREMENT:

Tape
should
be
loaded
and
not
write
protected,
and
should
not
be
near
EOT.
J u mper tot he b a c k - u p me m0 r y ( 0 n Rea d - ~v r i t e Servo Module) should be in the W4 ("STORE")
position.

TEST DESCRIPTION:

Test 33 determines and stores the read gains
at 25 IPS.
'l't1is test is similar to Test 31
except
it
is done only at 25 IPS, and
\v hen eve r a [ iJ U 1 t i s d e t e c ted ,
the t est i s
terminated and the fault is reported.

POSSIBLE TEIU1INATION CODES:
00 - Test Is Successful
01 - EGC Envelope Fault
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)
72 - Tape Write Protected Fault
73, 74 - Back Up Memory Not Write Enabled
75, 76 - Bad Back Up Memory
77 - EaT On EGC Fault
99 - Attempt to Loop on Test

NOTE 1:

After completing the test, replace the jumper to the
back-up memory from.the W4 ("STORE") position to the W3
operating position before powering down the transport.

NOTE 2:

Loop on test option is not permitted with this test.

2-33

TEST 34:

SET UP READ AMPLITUDES AT 100 IPS

TEST REQUIREMENT:

Tape
should
be
loaded
and
not
write
protected,
and
should
not
be
near
EOT.
Jumper to the back-up memory (on Read-~"r 1. teServo Module) should be in the W4 ("STORE")
position.

TEST DESCRIPTION:

Test 34 determines and stores the read gains
at 100 IPS.
This test is similar to Test 31
except it is done only at 100 IPS, and
v'lhenever a fault is detected, the test is
terminated and the fault is reported.

POSSIBLE TERMINATION CODES:
00 - Test Is Successful
01 - EGC Envelope Fault
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)
72 - Tape Write Protected Fault
73, 74 - Back Up Memory Not Write Enabled
75, 76 - Bad Back Up Memory
77 - EOT On EGC Fault
99 - Attempt to Loop on Test

NOTE 1:

After compteting the test, replace the jumper to the
back-up memory from the W4 ("STORE") position to the W3
operating position before poweri~g down the transport.

NOTE 2:

Loop on test is not permitted with this test.

2-34

TEST 37:

SET UP VELOCITY CORRECTION MULTIPLIER

TEST REQUIREMENT:

Tape should not be threaded.
Jumper to the
back-up memory (on Read-Write-Servo Module)
s h 0 u 1 d b e i n l h e ~~ t~ (II STOR E" ) P 0 sit ion.

TEST DESCRIPTION:

Test 37 sets up the velocity
multiplier [or the velocity DAC.

correction

TEST SEQUENCE:
a.

Check if the top cover door is closed and lape is absent.

Ho vet a k e - u pre e l f or war d a tab 0 u t
BOT radius).

Calculate velocity correction multiplier for velocity DAC.

Display Termination Code
multiplier is out of range.

velocity

correction

Stop
take-up
reel
and
store
multiplier in back-up memory.

velocity

correction

Display
Termination
successful.

Code

i f

IPS vel 0 cit y ( for

complete

test

POSSIBLE TERMINATION CODES:
00 - Test Is Successful
10 to 69 - Refer to respective Troubleshooting Procedure
73, 74 - Back Up Memory Not Write Enabled
75, 76 - Bad Back Up Memory
93- Velocity Correction Multiplier Factor Out of Range
94 - Tape Present Fault
99 - Attempt to Loop on Test

NOTEl:

Up 0 n s u c c e s s f u 1 com p let ion 0 f t his t est , CE Test
should be initiated to set up pump power-down timer.

NOTE 2:

Af ter complet ing the tes t, replace the jumper to the
back-up memory from the W4 ("STORE") position to the W3
operating position before powering down the transport.

NOTE 3:

Loop on test is not permitted with this test.

2-35

TEST 38:

PULSE F.rLE REEL AT 8 OUNCES

TEST REQUIREMENT:

Tape (10.5 inch rec~l) should
close to BOT without any loop.

TEST DESCRIPTION:

This test puts the take-up reel in Stoplock.
It pulses the file reel in the reverse
direction to maintain approximately 8 ounces
of tension.
Manual intervention is required
to terminate the test.

threaded

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is present.

Put take-up reel in Stoplock.

Turn on pump.

Pulse the file reel.

POSSIBLE TERMINATION CODES:
10 to 69 - Re[er to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-36

TEST 39:

WRITE ALL lIS TO EOT AT 25 IPS

TEST REQUIRMENT:

Tape should be loaded and not write protected.

TEST DESCRIPTION:

Test 39 writes tape with all lIs at 25 IPS to
EOT.
At EOT, tape is rewound to BOT.
All
options are available for the test.

TEST SEQUENCE:
a.

Check i f the top cover i s closed.

Check i f tape is loaded and not write protected.

Wr i te all lIs to EOT at 25 IPS.

Rewind to BOT.

Display Termination Code 00 if test is successful.

POSSIBLE TERMINATION CODES:
00 - Test Is Successful
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)
7 2 - Tap e tJ r i t e Pro t e c ted Fall 1 t

2-37

WRITE ALL l'S TO EOT AT 100 IPS
TEST REQUIRMENT:

Tape should be loaded and not write protected.

TEST DESCRIPTION:

Test 40 writes tape INith all l's at 100 IPS
to EOT.
First, it checks if tape is not
write protected.
It then writes all l's at
100 IPS to EaT.
At EaT, it is rewound to
BOT. All options are available for the test.

TEST SEQUENCE:
a.

Check i f the top cover is closed.

Check if tape is loaded and not write protected.

Write all l's to EOI' at 100 IPS.

Rewind to BOT.

Display Fault Code 00 i f test is successful.

POSSIBLE TERMINATION COnES:
00 - Test Is Successful
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)
7 2 - Tap e ~v r i t e Pro tee ted Fa u 1 t

2-38

TEST 41:

STOPLOCK TAKE-UP REEL

TEST REQUIREMENT:

Tape should not be loaded.

TEsr DESCRIPTION:

Test 41 checks the stoplock mode of the
t a k e - up r eel s e r va.
,Ma n u a 1 i n t e r v en t ion i s
required to terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed.

Put take-up reel servo in stoplock mode.

POSSIBLE TER£1INATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-39

TEST 42:

ENABLE TENSION SERVO

TEST REQUIREMENT:

Tape should be threaded.
Tape slack should be
Servo to be enabled.

TEST DESCRIP'fION:

removed

allow

File

Test 42 allows tape tension to be checked via
the ten s ion s e r v 0 •
I t pro d u c e s 8 0 u n c es 0 f
tension by enabling tension servo.

TEST SEQUENCE:
If tape is absent, go

Check if the top cover is closed.
to step d.

Take up slack in tape by slowly moving take-up reel in
reverse direction until tension is reached.

Enable tension servo operation at 8 ounces.

If tape is pulled out of tape path,
Code 00.

display Termination

POSSIBLE TERMINATION CODES:
00 - Test Is Successful
10 to 69 - Refer to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-40

TEST 43:

TURN ON PUMP

TEST REQUIREMENT:

Tape should not be loaded.

TEST DESCRIPTION:

Test
43
turns
on
the
pump.
Manual
intervention is required to terminate the
test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is not loaded.

Turn on pump.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-41

TEST 44:

FAST FOR~.JARD TO EOT

fEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Test 44 moves tape forward at rewind speed to
EOT.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Gradually increase speed and then maintain rewind speed.

Wait until EDT is detected.

Stop motion and display Termination Code 00.

POSSIBLE r~RMINATIOcl CODES:
00 - Test Is Successful
10 to 69 - Refer to respective Troubleshooting Procedure.
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-42

TEST 4 S:

EGC DAC SCOPE LOOP

TEST REQUIREfvlENT:

Tape should not be loaded.

TEST DESCRIPTION:

Test
(-is
exerc ises
the
EGC
DAC
on
the
Read/Write/Servo Module.
Use TP 12 as a sync
point and observe output at TP 14.
If EGC
DAC is operational, a triangle waveform of 35
fiS
period will be observed on the scope.
Manual termination is required to terminate
the test.

TEST SEQUENCE:
a.

Check if the top cover is closed.

Issue a trigger signal at TP 12.

Output zero voltage at TP 14 through EGC DAC, and
increase
it
by
20
mv
at
every
60
microseconds
(approximate) until it reaches 5 volts.

d•

Decrease output at TP 14 through EGC DAC by 20 mv at
every 60 microseconds (approximate) until it reaches 0
volt.

Go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-43

TEST 46:

VELOCITY DAC SCOPE LOOP

TEST REQUIREMENT:

Tape should not be loaded.

TEST 0 ESC RI PI ION:

Test lJ 6 ex e r cis e s t h eVe 10 cit Y 0 ACon the
Read/Wr ite/Servo Hodule.
Use TP 12 as a sync
point and observe output at TP 13 on the
scope.
If Velocity DAC is operational, a
triangle waveform of 35 ms period will be
observed on the scope. Manual termination is
required to terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed.

Issue a trigger signal at TP 12.

Output zero voltage at TP 13 through,Velocity DAC, and
increase
it
by
20
mv
at
every··· 60
microseconds
(approximntc) until it renches 6.9 volts.

Decrease output at TP 13 through Velocity DAC by 20 mv at
every 60 microseconds (approximate) until it reaches 0
volt.

S t e

p b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
71 - Invalid Operator Sequence (Tape Loaded Fault)

2-44

TEST 47:

READ/WRITE/SERVO MICROPROCESSOR OUTPUTS SCOPE LOOP

TEST REQUIREHENT:

Tape should not be loaded.

TEST DESCRIPTION:

Test 47 generates a pulse of 50 microseconds
every 5 rns on each of the addressable outputs
of
the
Read/Write/Servo
Module.
Hanual
intervention is required to terminate the
test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is not present.

Generate a 50 microsecond pulse every 5 ms on each of the
addressable outputs of Read/Write/Servo microprocessor.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure.
94 - Tape Present Fault

2-45

TEST 48:

SET UP PUMP POWER-DOWN TIMER

TEST REQUIREMENT:

Tape should not be threaded.
Jumper to the
backup
memory
(on
the
Read-Write-Servo
module)
should
be
in
the
W4
("STORE")
position.

TEST DESCRIPTION:

Test 48 sets up the pump power-down timer for
one minute if no tape motion has occurred.

POSSIBLE TERMINATION CODES:
00 - Test is successful
73, 74 - Backup memory is not write enabled.
75, 76 - Bad backup memory
94 - Tape Present Fault

NOTE 1:

After completing the test, replace the jumper to the
back-up memory from the W4 ("STORE") position to the W3
operating position before powering down the transport.

NOTE 2:

To disable the pump power-down timer, run CE Test 37.

2-46

TEST 50:

25 IPS FORWARD STREAMING RAMPS

TEST REQUIREMENT:

Tape should be loaded.

TEST DESCRIPTION:

Test 50 exercises the transport in a start/
stop mode at 25 ips using the streaming ramps
in
the
forward
direct ion.
\-1hen
EDT
is
detected, the same 25 ips mode is executed in
rever sed ire c t ion . ~~ hen 13 0 Tis d e tee ted, Lhe
routine starts again.
Manual intervention is
required to terminate the test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Ramp up to 25 ips using streaming ramp and run for 250 ms.

Stop using streaming ramp and pause for 250 ms.

Repeat steps b. and c. until EOT is detected.

Ra mpup

to 2 5 ips i nth ere v (;~ r sed ire c t ion and run for

250 ms.

Stop and pause for 250 ms.

Repeat steps e. and f. until BOT is detected.

Go to step b.

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-47

TEST 51:

25 IPS REVERSE STREAMING RAMPS

TEST REQUIREMENT:

Tape should be loaded.

T EST DES CRI PI I ON :

Te s t
51
ex e r cis e s t h e
t ran s po r t i n
a
start/stop mode at 25 ips using the streaming
ramps in the reverse direction.
When BOT is
detected, the same 25 ips mode is executed in
the forward direction. When EOT is detected,
the
routine
starts
again.
Manual
intervention is required to terminate the
test.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is loaded.

Ramp up to 25 ips using streaming ramp and run for 250 ms.

Stop using streaming ramp and pause for 250 ms.

Repeat steps b. and c. until BOT is detected.

Ramp up
250 ms.

Stop and pause for 250 ms.

Repeat steps e. and f. until EaT is detected.

Go to step h.

to 25

ips

the

forward direction and run for

POSSIBLE TERMINATION CODES:
10 to 69 - Refer to respective Troubleshooting Procedure
70 - Invalid Operator Sequence (Tape Not Loaded Fault)

2-48

TEST 61:

TAKE-UP MOrOR AND POWER AMP FULL CAPABILITY DETECTION
TEST

TEST REQUIREMENT:

Tape should not be threaded.

'fEST DESCRIPTION:

Test 61 checks out whether take-up motor
performance is within range or not.
It also
checks out whether take-up section of the
power amp
is capable of delivering full
current or not.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is absent.

Apply diagnostic lines to move take-up motor in forward
direction from a to 100 IPS, and measure time it requires
to ramp-up. Stop take-up motor.

Calculate motor constant from this data.

If motor constant is within range, go to step e.
If
motor constant is out of range the first time, repeat
steps b. and c. Otherwise, display Termination Code 84.

Apply full current to move take-up motor in forward
direction from a to 100 IPS, and measure time it requires
to ramp-up. Stop take-up motor.

If power amp is not capable of delivering full current in
forward direction, flag a fault, otherwise, go to step h.

If fault is the first time, repeat steps
otherwise, display Termination Code 82.

Apply full current to move take-up motor in reverse
direction from a to 100 IPS, and measure time it requires
to ramp-up. Stop tAke-up motor.

If power amp is not capable of delivering full current in
reverse direction, flag a fault, otherwise, go to step k.

If fault is the first time, repeat steps
otherwise, display Termination Code 82.

Display Termination
completion of test.

Code

2-49

indicate

and

f.,

i.,

successful

TEST 61:

(Cont'd)

POSSIBLE TERHINATION CODES:
00
10
82
84
94

- Test Is Successful
to 69 - Refer to respective Troubleshooting Procedure.
- Take-Up Power Amp Fault
- Take-Up Motor/Tach Fault
- Tape Present Fault

2-50

TEST 62:

TAKE-UP FINE TACH FAULT DE'l'ECTION

TEST REQUIREMENT:

Tape should not be threaded.

TEST DESCRIPTION:

Test 62 checks that the distance between two
consecutive quarter tachs (derived from fine
line tachs a t the take-up motor) is wi th in
tolerable limits.

TEST SEQUENCE:
a.

Check if the top cover is closed and tape is absent.

Ramp up to 4 IPS.

Ch e c k i f dis tan c e bet wee n
is within tolerable limits.

If, after five tries, at least once, the distance between
two consecutive quarter Lachs is within limits, go to
step f.

Display Termination Code 96.

Check that the distance between all consecutive quarter
tachs is within tolerable limits.

If distance between any two consecutive quarter tachs is
not within limits, report fault, otherwise, go to step i.

Repeat steps e. and f.
If the error
times, display Termination Code 84.

Display Termination
completion of test.

Code

l ~v a

can sec uti ve qua r t e r

detected

indicate

- Test Is Successful
to 69 - Refer to respective Troubleshooting Procedure.
- Take-Up Motor/Tach Fault
- Tape Present Fault
Formatter Interrupt received while test in progress.
- Servo Loop Fault

2-51

five

successful

POSSIBLE TERMINATION CODES:
00
10
84
94
95
96

t a c 11 s

TEST 91:

FUNCTIONAL FAULT DETECTION TEST

TEST REQUIRMENT:

A write enabled scratch tape should be loaded.

TEST DESCRIPTION:

Test 91 performs those functions that the
TU80 would normally perform during functional
operations.
Unit halts with the appropriate
error code, if a functional fault occurs.

TEST SEQUENCE:
a.

If tape
tape.

unloaded

then

Write 100 blocks at 25 IPS start/stop (NOTE 1).

Space Reverse, Erase, Write File Mark (check for File
Mark Detect), Space Reverse (check for File Mark Detect),
Read Forward, Read Reverse (check for File Mark Detect).

Read reverse 100
start/stop mode.

Read forward 2 blocks at 25 IPS start/stop mode.

Check gap lengths twice.

Read forward 94 blocks at 25 IPS start/stop mode.

Repeat steps d. to i. at 25 IPS continuous mode.

Repeat steps d. to i. at 100 IPS start/stop mode.

Change speed from high to low and then low to high.

Write 100 blocks at 100 IPS "thrashing" (NOTE 2).

Space reverse 10 blocks at 100 IPS "thrashing".

Read forward to blocks at 100 IPS "thrashing".

Rewind.

Speed mode change.

Read for\-lard 200 blocks nt
File MArk Detect).

Write to EOT at 100 IPS streaming (NOTE 2).

blocks

load

tape,

previously

2-52

otherwise,

written

1.00 IPS streaming

rewind

IPS

(check for

TEST 91:

(Cont'd)

Space reverse 200 blocks at 100 IPS streaming.

Read forward 10 blocks at 100 IPS "thrashing".

Read forward 20 blocks at 25 IPS start/stop :node.

Read reverse 20 blocks at 25 IPS start/stop mode.

Rewind.

NOTE 1:

Data blocks \vritten at 25 IPS are 2K bytes with the
first 256 bytes "random" and remaining bytes of fixed
pattern.

NOTE 2:

Data blocks
zeros.

\vritten at

100

IPS

are

256

bytes

POSSIBLE TERMINATION CODES:
00
01
02
03
04
05
06
07
08
10

- Test is Successful
- Read Envelope Fault
- Read Amplitude Range Fault
- 10 Check
- Low Speed Write Error
- Low Speed Read Error'
- High Speed Write Error
- High Speed Read Error
- Noise In IBG
to 69 - Refer to respective Troubleshooting Procedure.

2-53

all

rEST

97:

READ/WRITE CO~lMAND S rACK

TEST REQUIREMENT:

None.

T EST 0 ES CR I P r ION:

res t 9 7 a 110 \'Y s Fie 1 d S e r vic eRe pre sen tat i ve
to set up a command stack using Read, Write,
Space,
and Erase commands.
Up to three
commands
can
be
entered.
The
commands
available are:
Read Forward - 00
Read Reverse - 80
Space Forward - 08
Space Reverse - 88
Write - 40
Erase - 58
No-Op - 70 (included to allow "in-place"
analysis)
Write File Mark - 50
Rewind - 7/~
Speed Change - 04

TEST SEQUENCE:
a.

Set up [or test 97 and depress EXECUTE.

Display goes to "00" - enter first desired command Llsing
STEP and TEST (to mUltiply by 10) and depress EXECUTE.

Repeat step b.
commands.

to enter second and

third

After
third entry,
display goes to "00" and
indicator will illuminate. Test is terminated.

fault

two more

times

2 - 5l~

Section 3 - SUB-FAULT CODE DESCRIPTIONS

3.1
TU80 FAULT AND SUB-FAULT DESCRIPTIONS
The sub-fault code is displayed by pressing the CE switch after
the primary fault code is indicated. 1he numerical sub-fault
code will remain illuminated as long as the CE switch is held
pressed.
Interpretation of the numerical display using the tables in this
section is as follows:
1.

Example 1 - Fault Code 25, Sub-Fault Code 65
a.

d•

40
20
04
01
65

Take Up sensor saw fault code first.
Fault code occurred on up ramp.
Fault occurred in reverse direction.
Fault occurred with 100 ips demanded.
FAULT CODE 25 - LOW TENSION FAULT
SUB-FAULT
00
File sensor saw the fault first

a. _ _- - , 4 0

Takeup sensor saw the fault first

I!)UB- FAULT
Fault occurred during constant mot ion
00

Fault occurred on down ramp

i::

Fault occurred on up ramp

b. - - - - - - - . .

Fault occurred in stoplock

SUB-FAULT
Fault occurred in forward direction
00

Fault occurred in reverse direction

c. - - - - -.... 04

rOB-FAULT
00

Fault occurred with 25 ips demanded

!IIi 01
d.-----~

Fault occurred with 100 ips demanded

Fault occurred with 200 ips den.,anded

Fault occurred with 200 ips demanded

Figure 3-1.

SUB-FAULT CODE INTERPRETATION - EXAMPLE 1

3-1

Example 2 - Fault Code 25, Sub-Fault Code 11
00
10
00
01

b.
c •

File sensor saw fault first.
Fault occurred on down ramp.
Fault occurred in forward direction.
Fault occurred with 100 ips demanded.

11
FAULT CODE 25 - LOW TENSION FAULT

ISUB-FAULT
File sensor saw the fault first

-----l...~00

Takeup sensor saw the fault first

ISUo-FAULT
00
Fault occurred during constant motion

.. 10

Fault occurred on down ramp

Fault occurred on up ramp

Fault occurred in stoplock

SUB-FAULT
Fault occurred in forward direction

1 00
c. - - - -.....

Fault occurred in reverse direction

SoB-FAULT
00
Fault occurred with 25 ips demanded

d. ----:Jt.1Iio- 01

Fault occurred wi th 100 ips demanded

Fault occurred with 200 ips demanded

Fault occurred with 200· ips demanded

Figure 3-2.

SUB-FAULT CODE INTERPRETATION - EXAMPLE 2

3-2

FAULT CODE 01 - READ ENVELOPE FAULT
SUB-FAULT
00
Envelope not detected during read amplitude check
(EGC test)

FAULT CODE 02 - READ M1PLITUDE TOLERANCE FAULT
SUB - FAtJ'LT---00

.-------.-.--.
---_ . - -.-- -_ . .-.....-. . . ----Read amplitude outside range 1.5 volts + 0.8 volts
(i.e. difference between EGC gain and gain in backup
memory would cause an amplitude difference
greater than 0.8 volts)

FAULT CODE 03 - In FAULT
SUB-FAULT
00
Unable to read or write PE Identification Burst

FAULT CODE 04 - LOW SPEED WRITE ERRORS
SUB-FAULT
00
Unable to write a block at low speed within 5 attempts
37

Filemark detection error

Hore than 16 write error recoveries performed \lhile
writing to EaT at low speed during Field Service
Diagnostic Test 21

3-3

FAULT CODE 05 - LOW SPEED READ ERROR
SUB-FAULT
00

Data error detected while reading at low speed
(No error recovery performed)

Short IBG detected

Filemark detection error

FAULT CODE 06 - HIGH SPEED WRITE ERROR
SUB~FAULT

Unable to write a block at high speed within 5 attempts

File mark detection error

More than 16 write error recoveries performed while
writing to EOT at high speed during operator test 1 or
Field Service Diagnostic Test 23

FAULT CODE 07 - HIGH SPEED ~EAD ERROR

sun::Vl\ULT-·
00
Data error detected while reading at high speed (No
error recovery performed)
36

Short IBG detected

File mark detection error

FAULT CODE 08 - NOISE IN lBG
SUB-FAuLT
00

Noise detected during lBG or while erasing

3-4

FAULT CODE 10 - OPERATOR DOOR OPEN
(

SUB-FAULT
01

Door open on load

Door open after tensioning

Door opened during unload

Door open on untensioned unload

Door opened during untensioned unload

Door opened during retensioned load unload

Door open on diagnostic test

FAULT CODE 11 - ABSENCE OF TAPE
SUB-FAULT
01

Absence of tape on load

Absence of tape on Operator Diagnostic Test 02

FAULT CODE 12 - HUB NOT LATCHED
SUB-FAULT
01

Hub not latched on load

FAULT CODE 13 - TAPE THREADED INCORRECTLY
SUB-FAULT
01
02

Tension not detected on both sensors within 10
seconds
Second course tach not detected within 10 seconds

3-5

FAULT CODE 14 - BOT LOCATION FAULT
SUB-FAULT
01
BLTL loading not seen BOT
02

AOT loading not seen BOT

Did not get BLTL within 30 seconds during unload

FAULT CODE 15 - LOAD/UNLOAD ABORTED BY OPERATOR

S1JB-F'AULT
01
Reset pressed during load
02

Reset pressed during unload

FAULT CODE 16 - DIAGNOSTIC TAPE is WRiTE PROTECTED
SUB-FAULT
00
Attempted to execute a read/write diagnostic with
write protected tape

FAULT CODE 17 - RAN OFF END OF TAPE
SUB-FAULT
01
AOT trailer forward
02

BLTL trailer forward

BOT trailer reverse

3-6

FAULT CODE 18 - TAPE ALREADY LOADED
SUB-FAULT
00
Attempted to execute Operator Test 1 with tape already
loaded

FAULT CODE 20 - FILE TENSION SENSOR FAULT
===--~-::--;-:;--~--------------------'---------

SUB-FAULT
00
Offset comparator is low with minimuHl offset
01

Offset comparator is high with maximum offset

Upper tension detected with no tension

0 z.

de t e c ted

\;1

it h not ens ion

Did not reach 2 oz. within 100 IDS of takeup sensor
detecting 2 oz. during load.

FAULT CODE 21 - TAKEUP TENSION SENSOR FAULT
SUB-FAULT
00
Offset comparator is low with minimum offset
01

Offset comparator is high with maximum offset

2 oz detected with no tension

9 oz. detected with no tension

Upper tension detected with no tension

Did not reach 2 oz. within 100 ms of file sensor
detecting 2 oz during load

3-7

FAULT CODE 22 - UNABLE TO TENSION TAPE
SUB-FAULT
01

Unable to successfully maintain tension during load
(Fault is reported after tape is unloaded off EaT).

Unable to successfully maintain tension during load
(Fault is reported with tape still in the tape path
after failing to find AOT within 30 seconds)

Tape slipping on file reel while accelerating during
tension recovery

OL~

Tape slipping on file reel while decelerating during
tension recovery

Tape slipping on file reel while decelerating during
tension recovery/test load

FAULT CODE 23 - UNABLE TO RE-ESTABLISH TENSION
SUB-FAULT
01

Unable to establish tension during Test Load

Unable to maintain tension after stopping tape
following a test load

FAULT CODE 24 - HIGH TENSION FAULT

SUB-FAULT
00

Fault occurred during constant velocity motion

Fault occurred on down ramp

Fault occurred on up ramp

Fault occurred in stoplock

3-8

FAULT CODE 24 (Cont'd)

SUB-FAULT
00
Fault occurred in forward direction
04

Fault occurred in reverse direction

SUB-FAULT
Fault occurred with 25 ips demanded
00
01

Fault occurred with 100 ips demanded

Fault occurred with 200 ips demanded

---------

. ~-,---

SUB-FAULT
00
Fault occurred while drive was moving at constant
velocity, on ramp, or in stoplock for less than 1 sec.
01

Fault occurred with drive in stoplock for more than
1 sec.

SOB-FAULT
00

Fault occurred with pneumatic pump enabled.

Fault occurred with pneumatic pump shut down.

FAULT CODE 25 - LOW TENSION FAULT

SUB-FAULT
00
File sensor saw the fault first
40

Takeup sensor saw the fault first

3-9

....

FAULT CODE 25 (Cont'd)

SUB-FAULT
00
Fault occurred during constant motion

Fault occurred on down ramp

Fault occurred on up ramp

Fault occurred in stoplock

SUB-FAULT
00
Fault occurred in forward direction

Fault occurred in reverse direction

SUB-FAULT
00
Fault occurred with 25 ips demanded

Fault occurred with 100 ips demanded

Fault occurred with 200 ips demanded

-------_._-_. __._------------------------SUB-FAULT
00
Fault occurred while drive was moving at constant
velocity, on ramp, or in stoplock for less than I sec.

Fault occurred with drive in stcip10ck for more than
1 sec.

SUB-FAuL'F
00
Fault occurred with pneumatic pump enabled.

Fault occurred with pneumatic pump shut down.

3-10

FAULT CODE 26 - SERVO FAULT
SUB-FAULT
01

Takeup reel moving in wrong direction during
untensioned unload

Takeup reel not moving Juring untensioned unload

Takeup reel too fast during untensioned unload

Takeup reel too slow during untensioned unload

Voltage sensed in wrong half of file reel amplifier
bridge while pulsing file reel

Timeout to get unwind speed during untensioned unload

Voltage sense fault in file reel amplifier bridge
during load

Voltage sense fault in takeup reel amplifier bridge
during load

Fine line tach fault on load

FAULT CODE 27 - NO COARSE TACHS
SUB-FAULT
01

No coarse tachs during load

No coarse tachs during tension recovery section of
load

FAULT CODE 28 - TENSION RECOVERY PROBLEM
SUB-FAULT
01

Tension recovery lasting longer than 0.5 second

3-11

FAULT CODE 29 - ABSENCE OF TAPE
SUB-FAULT
01
Absence of tape

FAULT CODE 30 - UP RAHP FAULT
SUB-FAULT
01
Fa iled to move /~ quarter tachs in reverse direction
~vi thin deadman time
02

Failed to move
deadman time

Failed to move 0.08 inch in forward direction within
deadman time (detected by stiction test)

Failed to move 0.125 inch in forward direction within
deadman time (detected by stiction test)

Failed to reach top of ramp within deadman time

Ramp time less than nominal - 50% (i.e. too fast)

Ramp time greater than nominal

quarter tachs in forward within

+ 50% (i.e. too slow)

S DB - FAUl}Y-----···00
Fault occurred on forward ramp

Fault occurred on reverse ramp

SUrr=FAUL'I'
00
Fault occurred on 25 ips start/stopramp
40

Fault occurred on 100 ips ramp

Fault occurred on 25 ips streaming ramp

3-12

FAULT CODE 31 - DOWN IW·1P FAULT
SUB-FAULT

Failed to detect any quarter tachs in forward
direction

Failed to detect any quarter tachs in reverse
direction

Failed to detect change of direction (forward to
reverse) on forward 100 ips down ramp.

Failed to detect change of direction (reverse to
forward) on reverse 100 ips down ramp

Failed to reach end of forward 25 ips ramp within
deadman time

Failed to reach end of reverse 25 ips ramp within
deadman time

25 ips
fast)

(i.e.

too

25 ips ramp time greater than nominal + 50% (i.e.
slow)

too

100 ips
fast)

100 ips ramp time greater than nominal + 50% (i..e. too
slow)

ramp

time

less

than

nominal

tllan nominal

50%

SOB-FAULT
00

Fault occurred on forward ramp

Fault occurred on reverse ramp

SUB-FAULT

Fault occurred on 25 ips start/stop ramp

Fault occurred on 100 ips ramp

Fault occurred on 25 ips streaming ramp

3-13

50%

(i.e.

too

FAULT CODE 32 - STOPLOCK OVER-RUN
SUB-FAULT
01
TU Reel position is 32 quarter tachs reverse of correct
stoplock position.
02

TU Reel position is 32 quarter tachs forward of correct
stop lock position.

SUB-FAULT
00
Fault occurred with drive in stoplock less than 1 sec.

Fault occurred with drive in stoplock more than 1 sec.

SDB-FAULY
00
Fault occurred with pneumatic pump enabled.

Fault occurred with pneumatic pump shut down.

FAULT CODE 33 - TAPE POSITIONING FAULT
SUB-FAULT
01
Passed erase head turn-on point when about to write
at low speed
02

Passed erase head turn-on point when about to write
at high speed

FAULT CODE 34 - BOT POSITIONING FAULT
SUB-FAULT
01
Timed out waiting Eor BOT in forward direction during
a Load point "reposition".
02

Time out waiting for BOT in reverse direction during
a Load point "reposition".

3-14

FAULT 35 - POSITIONING FAULT
SUB-FAULT
00

Failed to reach target at 25 ips.

Failed to reach target at 100 ips

SUB-FAULT
00

Failed to reach target in forward di.rection

Failed to reach target in reverse direction
..---.----.----.

------

FAULT CODE 36 - SPEED FAULT
SUB-FAULT
00

Speed fault at 25 ips

Speed fault at 100 ips

SUB-FAULT
00

Speed fault occurred in forward direction

Speed fault occurred in reverse direction

SUB-FAULT
00
Speed less than nominal - 12.5% (i.e. too slow)
01

Speed greater than nominal + 12.5% (i.e. too fast)

FAULT CODE 37 - PUMP POWER-UP FAULT
SUB-FAULT
01

Unable to re-establish tension within 5 seconds.

3-15

FAULT CODE 47 - VELOCITY CORRECTION FAULT
SUB-FAULT
01

Speed correction multiplier in the backup memory is
out of range

FAULT CODE 48 - STT ILLOGICAL FAULT
SUB-FAULT
Did not find AOT within 6 seconds of losing tension on
unload
- - - - - - - - - - - ..-.-------.--.-------------.
01

FAULT CODE 50 - IRRECOVERABLE DEVICE HEALTHCHECK FAULT
SUB - FAULT
01

-------------.-------- .
Read-write-servo diagnostic PROi'f checksum fault

Read-write-servo flag memory fault

Read-write-servo PTM fault

Read-write-servo healthcheck did not complete

Read-write-servo initialization did not complete

Read-write-servo functional PROM checksum fault
---_. __ -.-. __ ._-_._------..

FAULT CODE 51 - RECOVERABLE D~VICE HEALTBCHEGK FAULT
SUB-=FAlJLT
11
EEPROM checksum fault
12

EEPROM defective

EGC DAC fault

3-16

FAULT CODE 52 - SPEED CALCULATION FAULT

-=::-:::::---="'~:-;:;:;------------------------------------.-

SUB-FAULT
10

A previous fault caused by modulus being too large

A previous fault caused by modulus change inconsistent
with direction of tape

A previous fault caused by modulus being outside
expected range

Unable to obtain consistent harvest counts in
determining the file reel radius

Unable to obtain harvest counts in determining file
reel radius within 5 seconds during load.

- - - - - - - - -----------

SUB-FAULT
01

This fault caused by modulus being too large

This fault caused by modulus change inconsistent
with direction of tape

This fault caused by modulus being outside expected
range

Tnis fault caused by harvest count greater than 8000
--------_.- --------------------_._-

FAULT CODE 53 - ARITHMETIC. ERROR

SUB-FAULT
01

Attempt to divide by 0

Integer overflow on floating point to integer
conversation

Negative result on floating point subtraction

3-17

FAULT CODE 54 - ILLOGICAL FAULT

SUB-FAULT
01

Erase current present after degauss

Erase Current present when reading

Erase Current not present when writing

FAULT CODE 55 - ILLOGICAL FAULT
SUB-FAULT
01

Failed to reach BOT within 5 minutes during load

Failed to reach BOT within 5 minutes during rewind

FAULT CODE 56 - PROCESSOR COMMUNICATION FAULT
SUB-FAULT
O~

Read-write-servo did not respond to system enable

Bus integrity test fault

Read-write-servo did not go busy in response to command
from formatter

Read-write servo rejected command from formatter

Read-write-servo did not acknowledge command from
formatter

Read-write servo did not respond to sense command
from formatter

3-18

FAULT CODE 57 - ILLOGICAL FAULT
SUB-FAULT
JO
Device did not stop after stop commanded
31

Device did not stop aEter reset

Device not at BOT after load

Device not at BOT after rewind

Device did not reset busy on reverse into BOT
---.--.-,-~---.~

FAULT CODE 58 - RECOVERABLE FORMATTER HEALTHCHECK FAULT
Second byte defines formatting logic fault.

FAULT CODE 59 - IRRECOVERABLE FORMATTER HEALTHCHECK FAULT
SUil-FAULT
00
Formatter PROM checksum fault

FAULT CODE 60 - IRRECOVERABLE OPERATOR PANEL FAULT
SUB-FAULT
00
LOAD/REWIND or UNLOAD or ONLINE or RESET switch
permanently pressed

FAULT CODE 61 - RECOVERABLE OPERATOR PANEL FAULT
SUB-FAULT
00
TEST or STEP or CE or EXEC switch permanently pressed

3-19