Toshiba Tecra A3 Manual de usuario
Toshiba Personal Computer
TECRA A3/S2
Maintenance Manual
TOSHIBA CORPORATION
ii Tecra A3/S2 Maintenance Manual
Copyright
© 2004 by Toshiba Corporation. All rights reserved. Under the copyright laws, this
manual cannot be reproduced in any form without the prior written permission of
Toshiba. No patent liability is assumed with respect to the use of the information
contained herein.
Toshiba Personal Computer Tecra A3/S2 Maintenance Manual
First edition December 2004
Disclaimer
The information presented in this manual has been reviewed and validated for accuracy.
The included set of instructions and descriptions are accurate for the Tecra A3/S2 Series
at the time of this manual's production. However, succeeding computers and manuals are
subject to change without notice. Therefore, Toshiba assumes no liability for damages
incurred directly or indirectly from errors, omissions, or discrepancies between any
succeeding product and this manual.
Trademarks
IBM is a registered trademark, and OS/2 and PS/2 are trademarks of IBM Corporation.
Microsoft, MS-DOS, Windows, DirectSound and DirectMusic are registered trademarks
of Microsoft Corporation.
Intel and Pentium are registered trademarks, and SpeedStep is a trademark of Intel
Corporation.
Sound Blaster is a registered trademark of Creative Technology Ltd.
Centronics is a registered trademark of Centronics Data Computer Corporation.
Photo CD is a trademark of Eastman Kodak.
All other properties are trademarks or registered trademarks of their respective holders.
Preface
This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer Tecra A3/S2, referred to as the Tecra A3/S2 in this manual.
The procedures described in this manual are intended to help service technicians isolate
faulty Field Replaceable Units (FRUs) and replace them in the field.
SAFETY PRECAUTIONS
Four types of messages are used in this manual to bring important information to your
attention. Each of these messages will be italicized and identified as shown below.
DANGER: ........“Danger” indicates the existence of a hazard that could result in death or
serious bodily injury if the safety instruction is not observed.
Tecra A3/S2 Maintenance Manual iii
WARNING:......“Warning” indicates the existence of a hazard that could result in bodily
injury if the safety instruction is not observed.
CAUTION: ... “Caution” indicates the existence of a hazard that could result in property
damage if the safety instruction is not observed.
NOTE: .......... “Note” contains general information that relates to your safe maintenance
service. Improper repair of the computer may result in safety hazards. Toshiba requires
service technicians and authorized dealers or service providers to ensure the following
safety precautions are adhered to strictly.
Be sure to fasten screws securely with the right screwdriver. If a screw is not fully
fastened, it could come loose, creating a danger of a short circuit, which could cause
overheating, smoke or fire.
If you replace the battery pack or RTC battery, be sure to use only the same model battery
or an equivalent battery recommended by Toshiba. Installation of the wrong battery can
cause the battery to explode.
iv Tecra A3/S2 Maintenance Manual
The manual is divided into the following parts:
Chapter 1 ...............................................................................................................................
Hardware Overview describes the Tecra A3/S2 Series system unit and each FRU.
Chapter 2 ...............................................................................................................................
Troubleshooting Procedures explains how to diagnose and resolve FRU problems.
Chapter 3 ...............................................................................................................................
Test and Diagnostics describes how to perform test and diagnostic operations for
maintenance service.
Chapter 4 ...............................................................................................................................
Replacement Procedures describes the removal and replacement of the FRUs.
Appendices............................................................................................................................
The appendices describe the following:
Handling the LCD module
Board layout
Pin assignments
Keyboard scan/character codes
Key layout
Screw torque list
Reliability
Tecra A3/S2 Maintenance Manual v
Conventions
This manual uses the following formats to describe, identify, and highlight terms and operating
procedures.
Acronyms
On the first appearance and whenever necessary for clarification acronyms are enclosed in
parentheses following their definition. For example:
Read Only Memory (ROM)
Keys
Keys are used in the text to describe many operations. The key top symbol as it appears on the
keyboard is printed in boldface type.
Key operation
Some operations require you to simultaneously use two or more keys. We identify such
operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause
(Break) means you must hold down Ctrl and at the same time press Pause (Break). If three
keys are used, hold down the first two and at the same time press the third.
User input
Text that you are instructed to type in is shown in the boldface type below:
DISKCOPY A: B:
The display
Text generated by the computer that appears on its display is presented in the type face below:
Format complete
System transferred
vi Tecra A3/S2 Maintenance Manual
Table of Contents
Chapter 1 Hardware Overview
1.1 Features ............................................................................................................................1-1
1.2 System Unit......................................................................................................................1-5
1.3 2.5-inch Hard Disk Drive.................................................................................................1-9
1.4 Removable Drives..........................................................................................................1-10
1.5 Power Supply .................................................................................................................1-16
1.6 Batteries..........................................................................................................................1-18
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting Introduction............................................Error! Bookmark not defined.
2.2 Troubleshooting Flowchart ...............................................Error! Bookmark not defined.
2.3 Power Supply Troubleshooting.........................................Error! Bookmark not defined.
2.4 Display Troubleshooting......................................……….Error! Bookmark not defined.
2.5 Keyboard Troubleshooting.............................................................................................2-15
2.6 External USB Devices Troubleshooting ........................................................................2-17
2.7 TV-Out Failure Troubleshooting ...................................................................................2-19
2.8 Printer Port Troubleshooting..........................................................................................2-21
2.9 TouchPad Troubleshooting ............................................................................................2-23
2.10 Speaker Troubleshooting................................................................................................2-25
2.11 Modem Troubleshooting................................................................................................2-27
2.12 PCMCIA Troubleshooting.............................................................................................2-29
2.13 IEEE 1394 Troubleshooting...........................................................................................2-31
2.14 Wireless LAN Troubleshooting .....................................................................................2-33
Tecra A3/S2 Maintenance Manual vii
Chapter 3 Tests and Diagnostics
3.1 The Diagnostic Test...........................................................Error! Bookmark not defined.
3.2 Executing the Diagnostic Test...........................................Error! Bookmark not defined.
3.3 Config Check Test .............................................................Error! Bookmark not defined.
3.4 DMI Check Test.................................................................Error! Bookmark not defined.
3.5 PIO Loopback Test............................................................Error! Bookmark not defined.
3.7 Speaker Audio Test............................................................Error! Bookmark not defined.
3.8 Fan ON/OFF Test ..............................................................Error! Bookmark not defined.
3.9 Main Battery Charge Test..................................................Error! Bookmark not defined.
3.10 FDD Test............................................................................Error! Bookmark not defined.
3.11 CD-ROM Test....................................................................Error! Bookmark not defined.
3.12 Keyboard Test....................................................................Error! Bookmark not defined.
3.13 Mouse (Pad) Test...............................................................Error! Bookmark not defined.
3.14 LCD Pixels Mode Test ......................................................Error! Bookmark not defined.
3.15 Lid Switch Test..................................................................Error! Bookmark not defined.
3.16 HDD R/W Test ..................................................................Error! Bookmark not defined.
3.17 LAN Test ...........................................................................Error! Bookmark not defined.
3.18 RTC Test............................................................................Error! Bookmark not defined.
viii Tecra A3/S2 Maintenance Manual
Chapter 4 Replacement Procedures
4.1 General .............................................................................................................................4-1
4.2 Battery..............................................................................................................................4-7
4.3 PC Card ............................................................................................................................4-8
4.4 HDD .................................................................................................................................4-9
4.5 Optical Drive Module.....................................................................................................4-12
4.6 Optical Drive..................................................................................................................4-13
4.7 Wireless LAN.................................................................................................................4-15
4.8 Expansion Memory ........................................................................................................4-17
4.9 Keyboard........................................................................................................................4-21
4.10 Bluetooth........................................................................................................................4-21
4.11 Modem............................................................................................................................4-25
4.12 Display Assembly...........................................................................................................4-26
4.13 Top Cover.......................................................................................................................4-28
4.14 Touch Pad.......................................................................................................................4-31
4.15 Speakers..........................................................................................................................4-32
4.16 System Board .................................................................................................................4-33
4.17 Direct Play buttom board ...............................................................................................4-36
4.18 Fan, Hest & CPU............................................................................................................4-37
4.19 Display Mask..................................................................................................................4-38
4.20 LCD Module...................................................................................................................4-42
4.21 FL Inverter Board...........................................................................................................4-44
Tecra A3/S2 Maintenance Manual ix
Appendices
Appendix A Handling the LCD Module .................................................................................A-1
Appendix B Board Layout ...................................................................................................... B-1
Appendix C Pin Assignments.................................................................................................. C-1
Appendix D Keyboard Scan/Character Codes ........................................................................ D-1
Appendix E Key Layout...........................................................................................................E-1
Appendix F Series Screw Torque List.....................................................................................F-1
Appendix G Reliability............................................................................................................ G-1
Chapter 1
Hardware Overview
1
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