Acer Extensa 450 Maintenance Manual

							Maintenance Manual
Extensa
 tm
 450 Series
Notebook Computers
9805725-0001
November 1995 
						

							Copyright (©) 1995 Texas Instruments Incorporated
All Rights Reserved — Printed in U.S.A.
Extensa 450 Series Notebook Computers
Maintenance Manual
TI Part No. 9805725-0001
Original Issue: November 1995
Changes may be made periodically to the information in this publication.
Such changes will be incorporated in new editions of this manual.
No part of this publication may be reproduced, stored in a retrieval system,
or transmitted, in any form or by any means, electronic, mechanical,
photocopy, recording, or otherwise, without the prior written permission of
Texas Instruments Incorporated. 
The equipment, as well as the programs that TI has created to use with
them, are tools that can help people better manage the information used in
their business; but tools — including TI products — cannot replace sound
judgement nor make the manager’s business decisions. 
Consequently, TI cannot warrant that its products are suitable for any
specific customer application. The manager must rely on judgement of what
is best for his or her business.
Address all correspondence regarding orders to:
Texas Instruments Incorporated
P.O. Box 6102, M/S 3255
Temple, Texas  76503
Extensa 450, TravelMate, 5000, 4000M, 4000E, 4000 and BatteryPro are trade-
marks of Texas Instruments Incorporated.  The icons in the Windows Notebook and
Startup groups are copyrighted by Texas Instruments Incorporated.
BitCom and BitFax are trademarks of BIT Software, Inc.
Hayes is a registered trademark and SmartModem2400 is a trademark of Hayes Mi-
croComputer Products Inc.
IBM, OS/2, AT PS/2, and VGA are trademarks of International Business Machines
Corporation.
Intel, and IntelDX4 are trademarks of Intel Corporation
Lotus is a trademark of Lotus Development Corporation
MNP is a registered trademark and Microcom is trademark of Microcom Inc. 
Microsoft and Windows 95 are  trade marks of  Microsoft Corporation.
Ethernet is a registered trademark of Xerox Corporation.
NetWare is a registered trademark of Novell, Inc.
UNIX is a registered trademark of American Telephone and Telegraph.
SimulSCAN is a trademark of Cirrus Logic, Inc. 
						

							Contents
Preface
Section 1  General Description 
1.1  Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2  Product Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3  International Product Versions . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4  Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.4.1  External Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.4.2  Touchpad Pointing Device . . . . . . . . . . . . . . . . . . . . . 1-6
1.4.3  Keyboard  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.4.4  Standard Power Features . . . . . . . . . . . . . . . . . . . . . . 1-8
1.4.5  Wireless Connection With Serial Infrared Port . . . . . . 1-9
1.4.6  Preloaded Software . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.4.7  Notebook Expansion Capabilities . . . . . . . . . . . . . . . . 1-9
1.5  Standard Test Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1.6  Notebook Assemblies and Subassemblies. . . . . . . . . . . . . . 1-10
1.6.1  Cover -Display Assembly . . . . . . . . . . . . . . . . . . . . . . 1-11
1.6.2  System Base Assembly . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.7  Extensa 450 Series Notebook Specifications . . . . . . . . . . . . 1-12
1.8  Agency Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Section 2    Installation  
2.1  Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2  Unpacking Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3  Installing Notebook Options  . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3.1  Installing Dual Inline Memory Module(s)  . . . . . . . . . . 2-1
2.3.2  Installing PCMCIA Options. . . . . . . . . . . . . . . . . . . . . 2-3
2.3.3  Installing the Port Adapter  . . . . . . . . . . . . . . . . . . . . 2-4
2.3.4  Installing the Optional Numeric Keypad   . . . . . . . . . . 2-5
2.4 Installing the Battery Pack(s ) . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.5 Installing External Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
 
Contents  iii 
						

							2.5.1 Installing an External Keyboard/Mouse  . . . . . . . . . . . 2-6
2.5.2 Installing External Parallel Printer . . . . . . . . . . . . . . . 2-8
2.5.3 Installing External Serial Port Device  . . . . . . . . . . . . . 2-8
2.5.4 Installing External VGA Monitor . . . . . . . . . . . . . . . . . 2-10
2.5.5 Installing SIR Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.6 Installing the AC Power Adapter   . . . . . . . . . . . . . . . . . . . . 2-11
2.7 Initial System Checkout  . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.8 Configuring the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.9 Making Backups of System Software . . . . . . . . . . . . . . . . . . 2-13
2.10 Loading Application Software . . . . . . . . . . . . . . . . . . . . . . 2-13
Section 3  Operating Instructions 
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Notebook Controls and Indicators . . . . . . . . . . . . . . . . . . . . 3-1
3.2.1 LCD Brightness Control . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.2 Button Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.3 Cover Release Latch . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2.4  Touch Pad Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2.5  Keyboard Mode LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.3  Operating Procedures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.3.1  Floppy Drive Operating Procedures . . . . . . . . . . . . . . 3-4
3.3.2  Installing/Removing PCMCIA Options . . . . . . . . . . . . 3-4
3.3.3  Computer Hot Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.3.4  Responding to Low Battery Conditions . . . . . . . . . . . . 3-5
3.3.5  Minimizing Power Usage . . . . . . . . . . . . . . . . . . . . . . 3-5
3.3.6  Recharging the Battery Packs . . . . . . . . . . . . . . . . . . 3-6
3.3.7  Restoring Missing System Files . . . . . . . . . . . . . . . . . 3-6
3.3.8  Rebuilding the System Software . . . . . . . . . . . . . . . . . 3-6
Section 4   Theory of Operation
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Notebook Functional Description . . . . . . . . . . . . . . . . . . . . 4-1
4.2.1  Processor/Memory Subsystems  . . . . . . . . . . . . . . . . 4-1
4.2.2  I/O Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4.2.3  Video Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
 
iv  Contents 
						

							4.2.4  Hard Disk Subsystem . . . . . . . . . . . . . . . . . . . . . . . . 4-8
4.2.5  Floppy Diskette Drive Subsystem . . . . . . . . . . . . . . . . 4-9
4.2.6  PCMCIA Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
4.2.7  Power Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Section 5  Troubleshooting Procedures
5.1  General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2  Overview of Fault Isolation Process . . . . . . . . . . . . . . . . . . 5-1
5.3  Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.3.1  Troubleshooting a Power Supply Problem . . . . . . . . . 5-3
5.3.2  Troubleshooting a Display Problem . . . . . . . . . . . . . . 5-5
5.3.3 Fault Isolation Using Selftest  . . . . . . . . . . . . . . . . . . . 5-5
5.3.4 PCMCIA Modem Problems. . . . . . . . . . . . . . . . . . . . . . 5-5
5.3.5 Fault Isolation Using Diagnostics  . . . . . . . . . . . . . . . . 5-6
Section 6  Field Service
6.1 Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2  Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2.1  Cleaning the Computer . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2.2  Protecting the Disk Drives . . . . . . . . . . . . . . . . . . . . . 6-2
6.2.3  Handling the Computer Battery Pack . . . . . . . . . . . . . 6-2
6.2.4  Restoring System Software. . . . . . . . . . . . . . . . . . . . . 6-2
6.3 Required Tools and Equipment   . . . . . . . . . . . . . . . . . . . . . 6-3
6.4 Notebook Field-Replaceable Parts and Assemblies. . . . . . . . 6-3
6.4.1  Cover -Display Assembly . . . . . . . . . . . . . . . . . . . . . . 6-3
6.4.2  System Base Assembly . . . . . . . . . . . . . . . . . . . . . . . 6-4
6.5 FRU Removal and Replacement Procedures . . . . . . . . . . . . 6-6
6.5.1 Removing/Replacing the Notebook Battery Pack . . . . . 6-6
6.5.2 Removing/Replacing PCMCIA Options . . . . . . . . . . . . 6-7
6.5.3 Removing/Replacing the Floppy Drive . . . . . . . . . . . . 6-7
6.5.4 Removing/Replacing the Hard Drive  . . . . . . . . . . . . . 6-7
6.5.5 Removing/Replacing the Keyboard Assembly . . . . . . . 6-8
6.5.6  Removing/Replacing the Heat Sink . . . . . . . . . . . . . . 6-8
6.5.7  Removing/Replacing Memory Modules (DIMMS) . . . . 6-9
6.5.8  Removing and Replacing the Cover -Display Assembly 6-10
 
Contents  v 
						

							6.5.9  Removing and Replacing the Inverter Board . . . . . . . . 6-10
6.5.10  Opening/Replacing the Top Case Assembly . . . . . . . 6-11
6.5.11  Removing/Replacing the Touch Pad Assembly . . . . . 6-11
6.5.12  Removing/Replacing the SIR Board . . . . . . . . . . . . . 6-13
6.5.13  Removing/Replacing the Primary Battery Board . . . 6-14
6.5.14  Removing/Replacing Power Supply Board  . . . . . . . . 6-15
6.5.15  Removing/Replacing the Memory Board . . . . . . . . . 6-16
6.5.16  Removing/Replacing the Main Board . . . . . . . . . . . . 6-16
6.5.17  Removing/Replacing the Secondary Battery Board . 6-18
Appendix A    Self-Test Error Messages 
   
A.1  Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  A-1
Appendix B    Connector Pinouts
B.1  Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Appendix C    PC-Doctor Diagnostics
C.1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
C.2  Starting PC-Doctor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
C.3  
Keyboard Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
C.4  Mouse Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
C.5  PC-Doctor Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
C.5.1  Online Help (?). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
C.5.2  Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
C.5.3  Interactive Tests Menu . . . . . . . . . . . . . . . . . . . . . . . C-4
C.5.4  Hardware Info Menu . . . . . . . . . . . . . . . . . . . . . . . . . C-5
C.5.5  Utility Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
C.6  Quitting PC-Doctor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
C.7  Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
 
vi  Contents 
						

							Preface
This manual provides installation, operation and servicing data for the
Extensatm 450 Series Notebook Computers.
Intended Audience
This manual is primarily intended for use by qualified service technicians
but contains information useful to non-technical users. 
Contents
This manual contains six sections and multiple reference appendices
including:  
·Section 1: General Description —
 Introduces the main features of the
notebook; provides a list of physical and electrical specifications.
·Section 2:  Installation — 
Describes how to unpack, install options
and cable up the notebook computer in a desktop environment.
·Section 3: Operating Instructions —
 Describes the notebook
operating controls and indicators and modes of operation.
·Section 4: Theory of Operation —
 Describes detailed theory of
operation for Extensa series notebooks.
·Section 5: Troubleshooting
 —  Provides troubleshooting procedures
for the Extensa 450 series notebooks.
·Section 6: Field Service
 — Provides corrective maintenance
procedures for the notebook computer.
·Appendix A: Self Test Error Messages
·Appendix B: Connector Pinouts
·Appendix C: PC-Doctor Reference Data
nNote: 
 Additional appendices will be added at a future date to document
new members of the Extensa product family.
Other Manuals About the System 
The following documents provide additional information related to the
Extensa 450 series:
  
Preface vii 
						

							·Extensa 450 Series Notebook Computer User’s Reference Manual,
Part No. 9803942-0001; contains reference information regarding the
Extensa 450 series software including the TI custom utilities.
·Windows 95 Help 
(online)
·PC-Doctor Help and Technical Reference
 (online)
Ordering Parts and Supplies
To order a copy of any TI publication or to order option kits, spare parts or
supplies for your system, contact your TI Reseller or:
Telephone Toll-free: 1-800-TI TEXAS
  
viii 
Preface 
						

							Section 1
General Description 
1.1 Introduction
This manual contains field and factory level servicing information for the Texas
Instruments Extensa tm 450 Series of Notebook Computers (Figure 1-1). 
This section provides a general overview and specifications for the Extensa 450
Series Notebook Computers. 
Figure1-1 Extensa 450 Series Notebook Computer
        
 General  Description 1-1 
						

							1.2  Product Models
Table 1-1 summarizes the features of the product models initially available in the
Extensa 450 product line. Basically, the product models offer a choice of either
10.4 Dual Scan Color or 9.4 Active Matrix Color LCDs and a choice of either the
basic Windows 95 operating system or Windows 95 plus applications. 
Table 1-1  Extensa 450 Series Notebook Computers
Model 450 Model 450T Model 455 Model 455T
10.4 DS LCD 9.4 Active Matrix
Color10.4 DS LCD 9.4 Active Matrix
Color
Windows 95 Windows 95 Windows 95 Plus
Microsoft Works,
Quicken SE,
Lotus Organizer,
and Microsoft
Entertainment
PackWindows 95 Plus
Microsoft Works,
Quicken SE,
Lotus Organizer,
and Microsoft
Entertainment
Pack
1.3   International Product Versions
The Extensa 450 Series Notebooks are available in one of 15 domestic and
international configurations as listed in Table 1-2.
Table 1-2. Notebook Domestic/International Configurations  
Configuration P/N Suffix Configuration P/N Suffix
Domestic -0001 Swedish  -0010
UK   -0002  Swiss/French -0011
German -0003 Danish -0012 
French -0004 Norwegian -0013
Spanish -0005 Finish -0014
Swiss/German -0006 Belgium  -0015
Italian   -0007 Austrian -0016 
Portuguese   -0008 Latin American -0018
Western European -0009
      
1-2  General  Description