Digital PDFs

EK-H7263-IN-001

December 1992

6 pages

Original

50.1kB

Document:	H7263 Power Regulator Installation Card
Order Number:	EK-H7263-IN
Revision:	001
Pages:	6
Original Filename:

OCR Text

digital

EK–H7263–IN.001

H7263 POWER REGULATOR
INSTALLATION CARD
Use this card as a quick reference to install or
replace the H7263 power regulator in a DEC
7000/10000 AXPTM or VAX 7000/10000 system. Refer
to the DEC 7000 AXP System/VAX 7000 Platform
Service Manual (EK–7000A–SV) and VAX 7000
Advanced Troubleshooting (EK–7001A–TS) for more
information.
INSTALLATION PREPARATION

1. Perform an orderly shutdown of the system.

Open the rear door of the cabinet and push the
handle down on the circuit breaker. The breaker
indicators will change to green.

A - Regulator slot A
B - Regulator slot B
C - Regulator slot C
S - Sensor circuit

Breaker
Indicator
C

BXB-0049G-92

1st Edition, December 1992
Copyright (c) 1992 by Digital Equipment
Corporation. All Rights Reserved.
Printed in U.S.A.

2. To ensure the circuit breaker is not unintention-

ally switched on, flip the lockout plate down and
lock the tag in place with a padlock.

3. Open the front door of the cabinet and loosen the

two captive Phillips screws (one each at the top
and bottom) of the regulator to be replaced or the
filler module where the power regulator will be
installed. Grasp the handles of the regulator and
pull it out.
WARNING: The power regulator weighs about
20 kg (40.4 lbs). Be very careful when lifing and
positioning it.

Precharge Stop

Front
Screws

BXB-0064F-92

4. When removing a regulator, do not touch the

33-pin DC connector on the rear of the regulator.
Cover the charged connector with the conductive
foam provided with the replacement regulator to
prevent rapid discharge of the stored energy.

Connector

BXB-0064G-92

INSTALLING AN H7263 POWER REGULATOR

1. Make certain the regulator is oriented correctly
and that the regulator precharge stop is in the
down position before installing.
Refer to the DEC 7000 AXP System/VAX 7000
Platform Service Manual for information on
regulator placement to ensure each phase is
balanced.

2. From the front of the cabinet, seat the power

regulator in its slot and push it in as far as it will
go. Do not force the regulator. If it does not fit,
make certain it is oriented correctly and that it is
the correct variation.
There are two variations: the H7263-AA for
North America and the H7263-AB for Europe/
GIA/Japan. There are mechanical interlocks to
ensure the correct regulator is used with the
correct AC input box.

3. Wait 5 seconds and then lift the precharge stop
and push the power regulator in the rest of the
way.

4. Tighten the captive screws at the top and bottom
of the power regulator.

5. Remove the padlock and switch the circuit
breaker to On.

POWER REGULATOR VERIFICATION
Power up the system by turning the keyswitch from
Disable to either the Enable or Secure position.
Power sequencing begins and the system runs selftest. Check the self-test display to make certain there
are no problems.
Each power regulator has a Run LED and a Fault
LED.

Run LED
Fault LED

Front

BXB-0064E-92

The following table summarizes the regulator LEDs
and the conditions represented.
NOTE: Replace the power regulator if the LEDs
indicate a fatal fault; the yellow LED is On.
Green
(Run)

Yellow
(Fault)

Condition

Off

No AC power present

Off

Fatal fault

Fast
flash

Off

AC power present; keyswitch in
Disable position

Fast
flash

Nonfatal fault

Slow
flash

Battery discharge mode

Off

Normal operation

Nonfatal faults include:
•

Internal heatsink temperature warning

•

Power factor correction stage failed

•

Regulator/battery failed battery test

•

48V to CCL module exceeds specified limits

Refer to VAX 7000 Advanced Troubleshooting for more
information.