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,...

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...

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  . . . . . ....

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 . . . . . . . . ....

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...

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...

·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...