Compaq TFT500 User manual

Notice
The information in this guide is subject to change without notice.
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TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN;
NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM
THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.
This guide contains information protected by copyright. No part of this guide may be
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Computer Corporation.
1997 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
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Product names mentioned herein may be trademarks and/or registered trademarks of their
respective companies.
Maintenance & Service Guide
Compaq TFT500 Flat Panel Monitor
First Edition (May 1997)
Part Number 285014-001
Compaq Computer Corporation

Contents v
TABLE OF CONTENTS
Preface..........................................................................................................................................................................iii
chapter 1
Removal and Replacement Procedures
1.1 Serial Number..............................................................................................................................................1-1
1.2 Features........................................................................................................................................................1-2
1.3 Front Panel Controls and LEDs...................................................................................................................1-3
1.4 Rear Panel Connectors.................................................................................................................................1-4
1.5 Disassembly and Assembly Procedures.......................................................................................................1-5
1.5.1 Power Supply ..................................................................................................................................1-5
1.5.2 Monitor Panel..................................................................................................................................1-6
1.5.3 Security Lock Provision Bracket.....................................................................................................1-8
1.5.4 Cable Access Cover Assembly........................................................................................................1-9
1.5.5 Rear Enclosure ..............................................................................................................................1-11
1.5.6 Support Bracket.............................................................................................................................1-12
1.5.7 Printed Circuit Board (PCB) Shield ..............................................................................................1-13
1.5.8 Printed Circuit Board.....................................................................................................................1-14
1.5.9 Front Bezel Assembly ...................................................................................................................1-16
1.5.10 Antireflective Screen/Protective Cover.........................................................................................1-17
1.5.11 TFT Liquid Crystal Display (LCD) Panel Assembly....................................................................1-18
1.5.12 Backlight Bulbs.............................................................................................................................1-19
chapter 2
Illustrated Parts Map

Preface iii
preface
This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when
servicing the Compaq TFT500 Flat Panel Monitor. Only authorized technicians trained by Compaq
should attempt to repair this equipment.
Compaq Computer Corporation reserves the right to make changes to the Compaq TFT500 Flat
Panel Monitor without notice.
Symbols and Conventions
The following words and symbols mark special messages throughout this guide:
!WARNING: Text set off in this manner indicates that failure to follow directions in the warning could
result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to
equipment or loss of data.
✎Text set off in this manner presents commentary, sidelights, clarifying information, or specific
instructions.
Technician Notes
!WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment. All
troubleshooting and repair procedures are detailed to allow only subassembly/module level repair.
Because of the complexity of the individual components and subassemblies, no one should attempt to
make repairs at the component level or to make modifications to any printed wiring board. Improper
repairs can create a safety hazard. Any indications of component replacement or printed wiring board
modifications may void any warranty.
CAUTION: To properly ventilate your monitor, you must provide at least 3-inches (7.6-cm) of clearance at
the back of the monitor.
CAUTION: The monitor is designed to be electrically grounded. To ensure proper operation, plug the AC
power cord into a properly grounded AC outlet only.
System Serial Number
The serial number is displayed on the monitor's back panel.

iv Preface
Locating Additional Information
The following documentation is available to support the monitor:
 Users Guide
 Compaq Service Advisories and Bulletins
 Compaq QuickFind
 Compaq Service Quick Reference Guide

Compaq TFT500 Flat Panel Monitor 1-1
chapter 1
Removal and Replacement
Procedures
This chapter provides removal and replacement assembly procedures for the Compaq TFT500 Flat
Panel Monitor.
1.1 Serial Number
The monitor serial number should be provided to Compaq when requesting information or ordering
spare parts. The serial number is displayed on the monitor’s back panel.
Figure 1-1. Locating the serial number

1-2 MSG/Removal and Replacement Procedures
1.2 Features
Feature Summary
■15.1-inch (38.35 cm) viewable area display
■Screen customizing adjustments displayed on-screen in five different languages: English, Dutch,
French, German, and Spanish
■Universal Serial Bus Hub interface—Plug and Play connectors for use with USB peripherals
(mouse, keyboard, video camera, etc.)
■Plug and Play capability if supported by your system
■Fault Management and Asset Control
■Desk arm mount (optional)
■Multisync with screen expansion
■1024 × 768 maximum resolution
■Wide viewing angle to allowing viewing from a sitting or standing position, or moving side-to-
side
■Energy Saver feature

Compaq TFT500 Flat Panel Monitor 1-3
1.3 Front Panel Controls and LEDs
The controls and LEDs located on the monitor’s front panel are identified below.
Figure 1-2. Front Panel Controls
Front Control Panel
No./Icon Control Function
1Select button 1. Launches on-screen display.
2. Selects function adjustments.
3. Exits menus and on-screen display.
2- Minus button Selects and adjusts the functions.
3+Plus button Selects and adjusts the functions.
4Power switch Turns the monitor on and off.
5Power LED 1. Green indicates monitor is turned on.
2. Yellow indicates suspend mode.
3. Amber indicates sleep mode.

1-4 MSG/Removal and Replacement Procedures
1.4 Rear Panel Connectors
The following illustration shows the rear panel connectors and the attached signal cable on the
Compaq TFT500 Flat Panel Monitor. Each connector includes an icon to help you identify its
function.
Figure 1-3. Rear Panel Connectors
Rear Panel Cable and Connectors
No. Cable/Connector Function
1Signal Cable Connects the monitor to a computer.
2USB* Connector Connects a USB peripheral to the monitor.
3USB* Connector Connects a USB peripheral to the monitor.
4USB* Connector Connects a USB peripheral to the monitor.
5USB* Cable Connector Connects the USB signal cable to the computer.
6Power Connector Connects the power cable to the electrical outlet.
*Universal Serial Bus connectors for USB peripherals such as a keyboard, mouse, video camera, etc., are fully
functional Plug and Play connectors.

Compaq TFT500 Flat Panel Monitor 1-5
1.5 Disassembly and Assembly Procedures
This section provides disassembly and assembly procedures for the Compaq TFT500 Flat Panel
Monitor. Before you begin any of these procedures, be sure to turn off the power to the monitor,
computer system, and other attached devices; then disconnect the power cable from the electrical
outlet.
CAUTION: As you disassemble the monitor, be sure to place the screws in a safe place, and separate
them according to their groupings.
1.5.1 Power Supply
1. Before removing the power supply (spare part no. 296473-001), disconnect the AC cable and all
USB peripheral cables from the power supply.
2. Lay the monitor down on the front bezel on a soft, stable area.
3. Remove the power supply from the monitor base by pulling out on the two clips - one on each
side of the power supply, then pull the power supply outwards and lift it out.
4. Disconnect the DC cable from the power supply.
Figure 1-4. Removing the power supply
To reinstall the power supply, reverse this procedure.

1-6 MSG/Removal and Replacement Procedures
1.5.2 Monitor Panel
1. Lift up and pull off the back side of the monitor base (spare part no. 296474-001).
Figure 1-5. Removing the back side of the monitor base

Compaq TFT500 Flat Panel Monitor 1-7
2. Remove the single screw from inside the monitor base as shown below.
Figure 1-6. Removing the single screw and separating the monitor panel
3. Loosen the data and DC power cables between the monitor panel and the base to allow enough
slack to separate the monitor panel from the base.
4. Separate the monitor panel from the monitor base (spare part no. 296474-001).
CAUTION: Be sure the monitor front bezel is lying down on a soft area to prevent it from getting scratched,
defaced, or broken.
To replace the monitor panel back onto the monitor base, reverse this procedure.

1-8 MSG/Removal and Replacement Procedures
1.5.3 Security Lock Provision Bracket
1. Remove the padlock-type of device if you have installed one.
2. Remove the screw head cover.
3. Remove the two screws from the spacers.
4. Remove the security lock provision bracket (spare part number 296483-001).
5. Remove the two spacers.
Figure 1-7. Removing the security lock provision bracket
To secure the monitor, a padlock-type of device needs to be inserted through the two end tabs. This
device is not included with the security lock provision bracket kit. It must be purchased separately.

Compaq TFT500 Flat Panel Monitor 1-9
1.5.4 Cable Access Cover Assembly
1. Remove four screws from the back of the cable access cover.
2. Remove the cable access cover (spare part no. 296475-001).
Figure 1-8. Removing the cable access cover

1-10 MSG/Removal and Replacement Procedures
3. Disconnect the signal cable and DC power cable from the monitor panel.
Figure 1-9. Disconnecting the signal cable and DC power cable.
To replace the cable access cover assembly, reverse this procedure.
✎The monitor base (spare part no. 296474-001) is now disassembled and can be replaced.

Compaq TFT500 Flat Panel Monitor 1-11
1.5.5 Rear Enclosure
1. Remove two screws from the rear enclosure.
2. Separate the rear enclosure (spare part no. 296476-001) from the monitor panel using the
Compaq Case Utility tool (Compaq tool kit #100767-001) to loosen the eight snaps (four on top
and two on the sides of the enclosure).
Figure 1-10. Removing the rear enclosure
To replace the rear enclosure, reverse this procedure.
✎If you are replacing the antireflective screen only, skip the next few sections and turn to section
1.5.9, Front Bezel Assembly.

1-12 MSG/Removal and Replacement Procedures
1.5.6 Support Bracket
1. Remove four screws from the support bracket (spare part no. 296477-001).
2. Remove the support bracket by sliding it down slightly from the top of the panel and lifting up.
Figure 1-11. Removing the support bracket
To replace the support bracket, reverse this procedure.

Compaq TFT500 Flat Panel Monitor 1-13
1.5.7 Printed Circuit Board Shield
1. Remove the seven screws from the printed circuit board (PCB) shield (spare part no. 296477-
001).
2. Carefully peel off the conductive tape located in several positions around the shield.
3. Remove the PCB shield.
Figure 1-12. Removing the PCB shield
✎When reinstalling the PCB shield, be sure to reapply the conductive tape in the correct
positions.

1-14 MSG/Removal and Replacement Procedures
1.5.8 Printed Circuit Board (PCB)
1. Remove ten screws from the PCB (spare part no. 296478-001).
2. Disconnect the five cables (spare part kit no. 296482-001) from the PCB.
Figure 1-13. Removing the screws and disconnecting the cables from the PCB

Compaq TFT500 Flat Panel Monitor 1-15
3. As you remove the PCB, disconnect the sixth cable from the board.
Figure 1-14. Disconnecting the sixth cable from the PCB
To replace the printed circuit board, reverse this procedure and connect this last disconnected cable
first.

1-16 MSG/Removal and Replacement Procedures
1.5.9 Front Bezel Assembly
1. Remove four screws from the front bezel (spare part no. 296479-001).
2. Lift off the LCD panel.
Figure 1-15. Removing the front bezel assembly
To replace the front bezel assembly, reverse this procedure.