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EK-VRC20-HX-A01

August 1994

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Document:	VRC20-Hx Ultra VGA Multi-Scanning Color Monitor Inst/Oper Info
Order Number:	EK-VRC20-HX
Revision:	A01
Pages:	26
Original Filename:

OCR Text

VRC20-Hx Ultra VGA MultiScanning 20-inch Color Monitor
Installation and Operating
Information
Order Number: EK–VRC20–HX. A01

August 1994
The information in this document is subject to change without notice and should not
be construed as a commitment by Digital Equipment Corporation.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject
to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data
and Computer Software clause at DFARS 252.227-7013.
FCC ID: ARFKDM2077
Note: This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference in a
residential installation. Any changes or modifications made to this equipment may
void the user’s authority to operate this equipment.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio and television reception; however, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Re-orient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit different from that to which
the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
DO NOT attempt to modify this equipment. If modified, your authority to operate
this equipment might be voided by the FCC.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus as set out in the Radio Interference Regulations of the
Canadian Department of Communications.
DEC and the DIGITAL logo are trademarks of Digital Equipment Corporation.
VGA is a registered trademark of International Business Machines Corporation.
SVGA and VESA are registered trademark of the Video Electronic Standards
Association.
The Energy Star emblem does not represent EPA endorsement of any product or
service.
Copyright © Digital Equipment Corporation 1994. All rights reserved.
Printed in Taiwan.

This document was prepared using VAX DOCUMENT Version 2.1.

Contents
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Installation
1.1
1.2

Monitor Installation . . . . . . . . . . . . . . . . . . . . .
User Controls . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–2

2 Servicing
2.1
2.2
2.2.1
2.2.2
2.3
2.3.1
2.3.2
2.3.3

Cleaning the Monitor . . . . . . . . . . . . . . . . . . . .
Maintenance and Troubleshooting . . . . . . . . . .
Identifying and Correcting Problems . . . . .
Troubleshooting Table . . . . . . . . . . . . . . . .
Servicing the Monitor . . . . . . . . . . . . . . . . . . .
DECmailer . . . . . . . . . . . . . . . . . . . . . . . . .
Carry-In Service . . . . . . . . . . . . . . . . . . . . .
Monitor Disposal . . . . . . . . . . . . . . . . . . . .

2–1
2–1
2–1
2–2
2–3
2–3
2–3
2–3

3 Specifications
3.1
3.2
3.3
3.4
3.5

Monitor Specifications . . . . . . . . . . . . . . . . . . .
Scanning Modes . . . . . . . . . . . . . . . . . . . . . . . .
Pin Assignments . . . . . . . . . . . . . . . . . . . . . . .
Power Management System . . . . . . . . . . . . . . .
Environment . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–2
3–3
3–3
3–4

iii

Figures
1–1

Monitor Control Panel . . . . . . . . . . . . . . . .

1–2

User Controls and Functions . . . . . . . . . . .
Save and Reload Functions . . . . . . . . . . . .
Secondary User Controls and Functions . .
Identifying and Correcting Problems . . . . .
Factory Pre-set Resolution and Frequencies
..................................

1–2
1–5
1–6
2–2

Tables
1–1
1–2
1–3
2–1
3–1

3–2

About This Guide
Overview
The VRC20-Hx Monitor is a 20-inch multi-scanning color monitor
with high resolution, compatible with VGA and SVGA built-in modes.

The VRC20-Hx offers the following features:
•

Power management system that exceeds the EPA Energy Star
requirements for saving energy

•

Anti-glare screen with anti-static coating

•

User controls for screen alignment, color adjustment, and mode
control

•

Manual and automatic degauss control

This product has been designed and manufactured to minimize
the impact to the environment. The monitor also has a power
management feature, which a personal computer can control to reduce
the monitor’s output power levels while not in use, thus saving energy.

Audience
This guide is intended for users who wish to install the monitor.

Conventions
The following conventions are used in this document:
Convention

Meaning

Note

Provides general information.

Caution

Provides information to prevent damage to equipment.

Warning

Provides information to prevent injury.

Installation/Operating Guidelines
Observe the following basic rules for installation and use.

Do . . .
•

Use the power cord supplied with the monitor, which is UL-, CSA-,
and VDE-approved, designed for a grounded outlet.

•

Turn the monitor off when you clean the monitor or if you do not
use it for an extended period of time.

Do Not . . .
•

Exceed the ac power output rating of the ac outlet of your
computer or other source.

•

Move the monitor on a stand over carpet or thresholds.

•

Push objects into the monitor’s openings.

•

Add accessories that are not designed for this monitor.

•

Operate the monitor near water or in a damp environment, which
could cause an electrical shock hazard.

•

Operate the monitor near magnets, motor devices, transformers,
high power lines, or large steel pillars, which can cause distortion
in the picture.

•

Obstruct the ventilation openings in the monitor’s cabinet, such as
placing the monitor on a rug or within an enclosure.

•

Place the monitor near a radiator or heat source.

•

Use liquid cleaners or aerosol cleaners. Instead, use a damp cloth
for cleaning.
Warning
The monitor weighs 30 Kg (66 lbs), so it may require two
people to lift the monitor out of its box.

vii

1
Installation
1.1 Monitor Installation
To connect your monitor:
1. Make sure the power to the monitor and the computer is off.
2. Connect the monitor’s signal cable to the 15-pin interface
connector on the High Resolution Graphic Video Adapter on the
back of the computer.
3. Plug in the ac power cord to the monitor, then to a
properly-grounded ac electrical outlet.
Turn On Power to Monitor
Push the power switch button to turn on the monitor. The power
indicator LED to the left of this switch should light green.

Installation 1–1

Installation
1.1 Monitor Installation
Figure 1–1 Monitor Control Panel

1.2 User Controls
Table 1–1 User Controls and Functions
Control

Action

Power

Push the switch. When the power is on, the LED beside the
power switch is on.

Power
Indicator

The power LED color has the following states:
Green

Normal operation

Yellow

Stand-by and suspend state

Amber

Off state
(continued on next page)

1–2 Installation

Installation
1.2 User Controls
Table 1–1 (Cont.) User Controls and Functions
Control

Action

Degauss
Switch

This monitor is equipped with automatic and manual degaussing.
Automatic degaussing is operative when the monitor is cold
(after being off for approximately 20 minutes). Therefore, if the
monitor is repositioned while it is warm and discoloration is
observed, it is important to remember to turn off the monitor
and let it cool. When powering the monitor back on, it will
then degauss automatically and discoloration will disappear.
Manual degaussing is operative by pressing the switch for a
few seconds.

Caution
Please allow a minimum of 20 minutes to elapse
between uses of the degauss button. Do not hold
the button down continuously to avoid decreasing
the life of the degauss circuitry.

Contrast— Press the right side of the button to sharpen
contrast. Press the left side of the button to reduce contrast.
Brightness— Press the right side of the button to increase
brightness. Press the left side of the button to reduce brightness.

Note
If the picture is too small or not centered, the
monitor does not recognize the input frequency
mode. Adjust the position and size of the picture
using the controls that follow.
(continued on next page)

Installation 1–3

Installation
1.2 User Controls
Table 1–1 (Cont.) User Controls and Functions
Control

Screen

Adjustment

Vertical Size— Press the right side of the
button to increase the vertical size of the
image. Press the left side of the button to
decrease the vertical size of the image.

Vertical Shift— Press the right side of the
button to move the image upward. Press
the left side of the button to move the image
downward.

Horizontal Size— Press the right side of
the button to increase the horizontal size of
the image. Press the left side of the button
to decrease the horizontal size of the image.

Horizontal Shift— Press the right side of
the button to move the image to the right
position. Press the left side of the button to
move the image to the left position.

1–4 Installation

Installation
1.2 User Controls
Table 1–2 Save and Reload Functions
Control

Action

SAVE

Press the SAVE button to save the display mode parameters
that you just set manually. The mode indicator light will blink to
indicate that the save has occurred.

Caution
If the SAVE button is not pressed, the settings will
not be permanently stored. Pressing the SAVE
or RELOAD button affects only those parameters
that can be changed in the current display mode
but does not affect those parameters that can be
changed in the other display mode. See MODE
control.
RELOAD

When the mode indicator light is off, pressing the RELOAD
button reloads the factory settings for the image size, position,
brightness and contrast.
When the mode indicator light is on, pressing the RELOAD
button reloads the factory settings for image color temperature
(R-, G-, and B-Gain), pincushion, trapezoid, and rotation.

Installation 1–5

Installation
1.2 User Controls
Table 1–3 Secondary User Controls and Functions
Control

Action

MODE

The MODE button allows you to switch between the Primary
controls and Secondary controls.
Mode
Indicator

Controls

Adjustments Affected

Off

Primary:

H-position, H-size, V-position, V-size,
brightness, and contrast.

Secondary: R-gain, G-gain, B-gain, pincushion,
trapezoid, and rotation.

Note
If no changes are made to the secondary controls
for sixty seconds, the mode automatically returns
to primary controls.
R-Gain

Press the left side of the button to decrease red video output.
Press the right side of the button increase red video output.

G-Gain

Press the left side of the button to decrease green video output.
Press the right side of the button to increase green video output.

B-Gain

Press the left side of the button to decrease blue video output.
Press the right side of the button to increase blue video output.

Note
Initially, all three gain settings are at maximum.
(continued on next page)

1–6 Installation

Installation
1.2 User Controls
Table 1–3 (Cont.) Secondary User Controls and Functions
Control

Screen

Secondary Control Adjustments

Pincushion—Corrects a bowed image. Press
the right side of the button to increase the
amount of side pincushion. Press the left
side of the button to decrease the amount of
side pincushion.

Trapezoid—Corrects a trapezoid image.
Press the right or left side of the button
to correct the distorted image shape to a
rectangle.

Rotation—Corrects a rotated image.
Press the right side of the button to rotate
the display screen clockwise. Press the left
side of the button to rotate the display screen
counter clockwise. This control is used to
compensate for any magnetic field effect on
the display.

Installation 1–7

2
Servicing
2.1 Cleaning the Monitor
To clean the monitor:
1. Unplug the monitor.
2. Clean the monitor with a soft, slightly damp cloth. Do not use an
aerosol cleaner directly on the screen.
Caution
Do not use benzene, thinner, or any volatile substance to
clean the monitor, as these product may discolor the monitor’s
cabinet. Likewise, do not place rubber or vinyl on the monitor.

2.2 Maintenance and Troubleshooting
2.2.1 Identifying and Correcting Problems
The following can be sources of problems:
•

Communications cables

•

Host system

•

Nearby power or electrical sources

Servicing 2–1

Servicing
2.2 Maintenance and Troubleshooting

2.2.2 Troubleshooting Table
Use Table 2–1 to identify and correct any problem areas.
Table 2–1 Identifying and Correcting Problems
Symptom

Possible Cause

Suggested Solution

Display does not
appear.

Brightness or Contrast
control is set too low.

Increase the brightness
and contrast control
setting.

Power Management
feature is active in the
off state.

Press any key and
allow 20 seconds for
the monitor to warm up.

There is no power.

Check the power cord.
Use another ac outlet.

There is electromagnetic interference.

Move any electromechanical device, such as a fan
or a motor, away from
the monitor or move the
monitor.

Video display has
moving dots and
distorted lines. The
display rolls or flickers.

Warning
Serious shock hazards exist inside this display. There are no
user serviceable parts inside. DO NOT remove covers under
any circumstances or attempt to service the monitor yourself.
Call a qualified service representative.

2–2 Servicing

Servicing
2.3 Servicing the Monitor

2.3 Servicing the Monitor
Digital provides a wide range of maintenance programs for monitors.
It is recommended that you use either DECmailer or Carry-In Service
when servicing the VRC20-Hx monitor. If needed, use the original box
and packing material to send the unit to the service location. Contact
your local Digital Services office.

2.3.1 DECmailer
DECmailer provides a mail-in service for the VRC20-Hx monitor.
Ship the monitor to your nearest Digital Servicenter using a common
carrier. The monitor will be repaired or exchanged and returned to
you.

2.3.2 Carry-In Service
Digital Carry-In Servicenters are located in major cities around the
world. They offer convenient, cost-effective repair service with a
48-hour turnaround time.

2.3.3 Monitor Disposal
Warning
If you need to dispose of a unit, ask a qualified service
representative for the proper procedure. Improper disposal
could result in personal injury from implosion.

Servicing 2–3

3
Specifications
3.1 Monitor Specifications
Monitor
Active area

50.8 cm (20 in) non-glare, non-static
36.0

27.0 cm (±0.5 cm)

Height

45.0 cm (17.7 in)

Width

48.0 cm (18.9 in)

Depth

48.0 cm (18.9 in)

Swivel

±45°

Tilt

-5° to +10°

Weight

30 Kg (66 lbs)

Video Signal

0.7V p-p R, G, B color (positive) 75 .

H-Sync

TTL, or SYNC on Green, positive or negative,
1K min. 30K to 82KHz (multi-scanning).

V-Sync

TTL, or SYNC on Green, positive or negative,
1K min. 50 to 120 Hz.

Connector

15-pin D-sub

Power input

90 - 135 Vac, 2.5 A max at 60 Hz; 180 - 264 Vac,
1.25 A max at 50 Hz (auto-switching)

Power consumption

150 W (max)

Environment:
Operating Temperature

+10 to +40°C

Humidity

10 - 90% relative humidity (noncondensing)

Specifications 3–1

Specifications
3.2 Scanning Modes

3.2 Scanning Modes
To minimize adjustment needs, the monitor has 11 factory pre-set
display standards, shown in Table 3–1. When the monitor detects any
of these display standards, it automatically adjusts the picture size
and centering. All the vertical refresh rates are non-interlaced.
Table 3–1 Factory Pre-set Resolution and Frequencies
Pre-set Addressability

Vertical

Horizontal

Mode

(Pixels x Lines)

Refresh (Hz)

Frequency (kHz)

640 x 480 (VGA/60)

59.95

31.47

1152 x 900 (76)

76.15

71.81

640 x 480 (VGA VESA 75)

75.00

37.50

720 x 400 (70)

70.08†

31.47

800 x 600 (SVGA VESA 75)

75.00†

46.88†

1024 x 768 (VESA 70)

70.07

56.48

1024 x 768 (VESA 75)

75.03†

60.02†

1024 x 864 (Digital)

60.02

54.05

1280 x 1024 (60)

60.10

64.98

1280 x 1024 (72)

72.56

77.17

1280 x 1024 (75)

75.03

79.98

†positive polarities

3–2 Specifications

Specifications
3.3 Pin Assignments

3.3 Pin Assignments
The pin assignments for the 15-pin D-type connector are:
Pin

Signal

Red

Red Return

NC1

Green

Green Return

Blue

Blue Return

H-SYNC

ID Connect to pin 10

V-SYNC

GND

Logic GND

1 NC = no connection

3.4 Power Management System
The monitor has three power-saving states, indicated by the LED on
the front panel:
LED

State

Power Consumption†

Recovery Time

Green

Normal 150 w (max)

Yellow

Standby/
Suspend

< 30 watts

Dark amber

Off

< 8 watts

15 s

† These power-saving states exceed the Environmental Protection Agency (EPA)
Energy Star requirements using the Video Electronics Standard Association (VESA)
methodology for Display Power Management Signals.

The Power Management function requires TTL horizontal and vertical
sync. For proper operation of this Power Management System, make
sure that the monitor signal cable is connected to the host system and
that the host system is On.

Specifications 3–3

Specifications
3.5 Environment

3.5 Environment
This product has been designed and manufactured to minimize the
impact to the environment. The packaging is recyclable and the
monitor can be returned for proper disposal.
Acoustic Levels
Preliminary declared values per ISO 9296 and ISO 7779:
Sound Power Level1

Sound Pressure Level2
L   , dBA

L  , B
Product

Idle

Operate

Idle

Operate

VRC20-Hx

<4.0

<35

1 1 B = 10 dBA.
2 Operator position.

Asbestos
This product does not use asbestos in any form.
Flame Retardants
The enclosures do not contain polybrominated diphenylether (PBDE)
as a flame retardant additive; therefore, they do not emit toxic
dibenzofuran and dibenzodixion gases.
Ozone Depleting Substances (ODS)
The VRC20-Hx is in full compliance with the labeling requirements in
the U.S. Clean Air Act Amendments of 1990. It does not contain, nor
is it manufactured with, a Class 1 ODS, as defined in Title VI Section
611 of this act.

3–4 Specifications

Specifications
3.5 Environment
PVC
The plastic enclosures are not made of rigid PVC. The material has a
non-halogenated, flame-retardant system and is cadmium free.
Recyclable Material
The packaging material can be recycled, or you can save it to return
the monitor to a service center for repair or disposal.
VCCI Class 2

Specifications 3–5