Acer PD721 User manual

Acer PD721
Service Guide
Service CD P/N: N/A
Service guide files and updates are available
on the CSD web; for more information,
please refer to http://csd.acer.com.tw

II
Revision History
Please refer to the table below for the updates made on Acer Altos PD721 service guide.
Date Chapter Updates

III
Copyright
Copyright © 2001 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, i
in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise,
without the prior written permission of Acer Incorporated.
Disclaimer
The information in this guide is subject to change without notice.
Acer Incorporated makes no representations or warranties, either expressed or implied, with respect
to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any
particular purpose. Any Acer Incorporated software described in this manual is sold or licensed "as is".
Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated,
its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any
incidental or consequential damages resulting from any defect in the software.
Acer is a registered trademark of Acer Corporation.
Intel is a registered trademark of Intel Corporation.
Pentium and Pentium II/III are trademarks of Intel Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.

IV
Conventions
The following conventions are used in this manual
:
Screen messages Denotes actual messages that appear
on screen.
NOTE Gives bits and pieces of additional
information related to the current
topic.
WARNING Alerts you to any damage that might
result from doing or not doing specific
actions.
CAUTION Gives precautionary measures to
avoid possible hardware or software
problems.
IMPORTANT Reminds you to do specific actions
relevant to the accomplishment of
procedures.

V
Preface
Before using this information and the product it supports, please read the following general information.
1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION
decided for Acer's "global" product offering. To better fit local market requirements and enhance product
competitiveness, your regional office MAY have decided to extend the functionality of a machine (e.g.
add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered
in this generic service guide. In such cases, please contact your regional offices or the responsible
personnel/channel to provide you with further technical details.
2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information
available on your regional web or channel. If, for whatever reason, a part number change is made, it will
not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer
office may have a DIFFERENT part number code to those given in the FRU list of this printed Service
Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and
service of customer machines.

VI

Table of Contents
Chapter 1 System Introduction........................................................................... 1
Technical Specification.................................................................................................1
Product Overview.........................................................................................................3
System BlockDiagram............................................................................................... 6
Chapter 2 Firmware Upgrade..............................................................................10
Setup Procedure..................................................................................................11
Upgrading Procedure............................................................................................11
Chapter 3 MachineDisassemblyandReplacement................................................ 17
Tool Needed.........................................................................................................17
General Information.............................................................................................. 17
Removing Top Cover Module, Keypad Board and Speaker........................................ 18
Removing AV Module and Connector Board............................................................ 20
Removing Lamp Ballast and Power Supply..............................................................21
Removing Lamp Module and Thermal Board............................................................22
Removing Fan Module and Front End Board............................................................23
Removing Formatter Board....................................................................................24
Removing Engine Module......................................................................................25
Chapter 4 Troubleshooting...........................................................................................26
Equipment Needed.............................................................................................. 26
Main Procedure..........................................................................................27
Power Troubleshooting................................................................................28
Performance Troubleshooting.......................................................................29
Function Troubleshooting............................................................................30
Audio Troubleshooting.................................................................................31
Remote Control Troubleshooting..................................................................31
Function Test and Alignment Procedure................................................................32
Equipment Needed....................................................................................32
Test Condition...........................................................................................32
Test Display Modes and Patterns.........................................................................33
Compatible Modes.................................................................................... 33
Function Test Display Pattern.................................................................... 35
Inspection Procedure......................................................................................... 37
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1Chapter 1
Chapter 1
System Introduction
Technical Specification
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3Chapter 1
Product Overview
Main Unit
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