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Extensa 390 Maintenance Manual
390 Series
Notebook Computer
390 Series
Notebook Computer
Service Guide
PART NO.: 49.43A02.001
DOC. NO.: SG234-9710A
PRINTED IN TAIWAN
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Copyright
Copyright ª 1997 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, in any form or by any means, electronic, mechanical, magnetic, optical,
chemical, manual or otherwise, without the prior written permission of Acer Incorporated.
Disclaimer
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. Further, Acer Incorporated reserves the right to revise this publication and to make
changes from time to time in the contents hereof without obligation of Acer Incorporated to notify
any person of such revision or changes.
Intel is a registered trademark and Pentium is a trademark of Intel Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.
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About this Manual
Purpose
This service guide aims to furnish technical information to the service engineers and advanced
users when upgrading, configuring, or repairing the 390 series notebook computer.
Manual Structure
This service guide contains technical information about the 390 series notebook computer. It
consists of three chapters and five appendices.
Chapter 1 System Introduction
This chapter describes the system features and major components. It contains the 390
series notebook computer board layout, block diagrams, cache and memory configurations,
power management and mechanical specifications.
Chapter 2 Major Chips Description
This chapter describes the features and functions of the major chipsets used in the system
board. It also includes chipset block diagrams, pin diagrams, and pin descriptions.
Chapter 3 BIOS Setup Utility
This chapter describes the parameters in the BIOS Utility screens.
Chapter 4 Disassembly and Unit Replacement
This chapter describes how to disassemble the 390 series notebook computer to make
replacements or upgrades.
Appendix A Model Number Definition
This appendix shows the different configuration options for the 390 series notebook
computer.
Appendix B Exploded View Diagram
This appendix illustrates the system board and CPU silk screens.
Appendix C Spare Parts List
This appendix lists the spare parts for the 390 series notebook computer with their part
numbers and other information.
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Appendix D Schematics
This appendix contains the schematic diagrams for the system board.
Appendix E BIOS POST Checkpoints
This appendix lists and describes the BIOS POST checkpoints.
Conventions
The following are the conventions used in this manual:
Text entered by user
Represents text input by the user.
Screen messages
Denotes actual messages that appear onscreen.
,
, , etc.
Represent the actual keys that you have to press on the
keyboard.
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.
TIP
Tells how to accomplish a procedure with minimum steps
through little shortcuts.
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Table of Contents
Chapter 1
System Introduction
1.1
Overview ... .......................................................................................................... 1-1
1.2
System Board Layout... ........................................................................................ 1-2
1.2.1
Mainboard .... ......................................................................................... 1-2
1.2.2
CPU Board... ......................................................................................... 1-4
1.2.3
Audio Board ...... .................................................................................... 1-5
1.2.4
Battery Board ........................................................................................ 1-5
1.2.5
Keyboard/Touchpad Board.... ................................................................ 1-6
1.3
Jumpers and Connectors ... .................................................................................. 1-7
1.4
Hardware Configuration and Specification..... ....................................................... 1-9
1.4.1 Memory Address Map ... ........................................................................ 1-9
1.4.2 Interrupt Channel Map........................................................................... 1-9
1.4.3 DMA Channel Map .. .............................................................................1-10
1.4.4 I/O Address Map ..................................................................................1-10
1.4.5 Processor............. ................................................................................1-11
1.4.6 BIOS ....................................................................................................1-11
1.4.7 System Memory ...................................................................................1-11
1.4.8 Second-Level Cache ... .........................................................................1-12
1.4.9 Video Memory... ...................................................................................1-13
1.4.10 Video ...................................................................................................1-13
1.4.11 Parallel Port .... .....................................................................................1-14
1.4.12 Serial Port ...... ......................................................................................1-15
1.4.13 Audio ...................................................................................................1-15
1.4.14 PCMCIA...............................................................................................1-15
1.4.15 Touchpad ... ..........................................................................................1-16
1.4.16 Keyboard .............................................................................................1-16
1.4.17 FDD ... ..................................................................................................1-17
1.4.18 HDD......... ............................................................................................1-18
1.4.19 CD-ROM ..............................................................................................1-18
1.4.20 Battery .... .............................................................................................1-19
1.4.21 Charger................................................................................................1-19
1.4.22 DC-DC Converter.... .............................................................................1-20
1.4.23 DC-AC Inverter ... .................................................................................1-21
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