Toshiba TECRA A5 User manual

Toshiba Personal Computer
Tecra A5
Maintenance Manual
TOSHIBA CORPORATION
[CONFIDENTIAL]

ii [CONFIDENTIAL] Tecra A5 Maintenance Manual
Copyright
© 2005 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 A5 Maintenance Manual
First edition May 2005
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 A5 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.

Tecra A5 Maintenance Manual [CONFIDENTIAL] iii
Preface
This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer Tecra A5, referred to as the A5 Series 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.
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 [CONFIDENTIAL] Tecra A5 Maintenance Manual
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the A5 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 A5 Maintenance Manual [CONFIDENTIAL] 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 typeface below:
Format complete
System transferred

vi [CONFIDENTIAL] Tecra A5 Maintenance Manual

Tecra A5 Maintenance Manual [CONFIDENTIAL] vii
Table of Contents
Chapter 1 Hardware Overview
1.1 Features............................................................................................................................1-1
1.2 System Unit......................................................................................................................1-6
1.3 2.5-inch Hard Disk Drive.................................................................................................1-8
1.4 Optical device Drives.......................................................................................................1-9
1.5 Power Supply.................................................................................................................1-12
1.6 Batteries .........................................................................................................................1-14
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting Introduction..........................................................................................2-1
2.2 Troubleshooting Flowchart..............................................................................................2-2
2.3 Power Supply Troubleshooting .......................................................................................2-7
2.4 Display Troubleshooting...................................................................................……….2-12
2.5 Keyboard Troubleshooting ............................................................................................2-15
2.6 External USB Devices Troubleshooting........................................................................2-17
2.7 TV-Out Failure Troubleshooting...................................................................................2-19
2.8 TouchPad Troubleshooting............................................................................................2-21
2.9 Speaker Troubleshooting...............................................................................................2-23
2.10 Optical Drive Troubleshooting......................................................................................2-25
2.11 Modem Troubleshooting................................................................................................2-28
2.12 PCMCIA Troubleshooting.............................................................................................2-30
2.13 IEEE 1394 Troubleshooting ..........................................................................................2-32
2.14 Wireless LAN Troubleshooting.....................................................................................2-34

viii [CONFIDENTIAL] Tecra A5 Maintenance Manual
Chapter 3 Tests and Diagnostics
3.1 The Diagnostic Test .........................................................................................................3-1
3.2 Executing the Diagnostic Test..........................................................................................3-2
3.3 Config Check Test............................................................................................................3-6
3.4 DMI Check Test...............................................................................................................3-8
3.5 Speaker Audio Test.........................................................................................................3=9
3.6 Fan ON/OFF Test...........................................................................................................3-10
3.7 Main Battery Charge Test ..............................................................................................3-11
3.8 FDD Test........................................................................................................................3-12
3.9 CD-ROM Test................................................................................................................3-13
3.10 Keyboard Test ................................................................................................................3-14
3.11 Mouse (Pad) Test ...........................................................................................................3-16
3.12 LCD Pixels Mode Test...................................................................................................3-18
3.13 Magnetic Switch Test.....................................................................................................3-19
3.14 HDD R/W Test...............................................................................................................3-20
3.15 LAN Test........................................................................................................................3-22
3.16 RTC Test ........................................................................................................................3-14
3.17 Read 1394 GUID.............................................................................................................3-25
3.18 CD Control Button Test ..................................................................................................3-16
3.19 Speaker EQ Type Check&Re-Write ................................................................................3-18

Tecra A5 Maintenance Manual [CONFIDENTIAL] ix
Chapter 4 Replacement Procedures
4.1 General......................................................................................................................... 4-1
4.2 Battery.......................................................................................................................... 4-7
4.3 PC Card ........................................................................................................................ 4-9
4.4 HDD ........................................................................................................................... 4-11
4.5 Expansion Memory.................................................................................................... 4-13
4.6 Optical Drive Module................................................................................................. 4-16
4.7 Optical Drive.............................................................................................................. 4-18
4.8 Keyboard.................................................................................................................... 4-20
4.9 Bluetooth module....................................................................................................... 4-23
4.10 Wireless LAN Unit..................................................................................................... 4-27
4.11 Modem ....................................................................................................................... 4-31
4.12 Display Assembly ...................................................................................................... 4-34
4.13 Top Cover................................................................................................................... 4-37
4.14 Touch Pad................................................................................................................... 4-40
4.15 Direct Play Button Module ........................................................................................ 4-42
4.16 Memory...................................................................................................................... 4-44
4.17 System Board ............................................................................................................. 4-48
4.18 Fan & CPU................................................................................................................. 4-51
4.19 USB Module............................................................................................................... 4-56
4.20 VGA Module.............................................................................................................. 4-58
4.21 Display Mask.............................................................................................................. 4-60
4.22 Speakers ..................................................................................................................... 4-62
4.23 FL Inverter Board....................................................................................................... 4-64
4.24 LCD Module .............................................................................................................. 4-66

x [CONFIDENTIAL] Tecra A5 Maintenance Manual
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

[CONFIDENTIAL]
Chapter 1
Hardware Overview
1

1 Hardware Overview
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1 Hardware Overview
Tecra A5 Series Maintenance Manual [CONFIDENTIAL] 1-iii
Chapter 1 Contents
1.1 Features......................................................................................................................1-1
1.2 System Unit................................................................................................................1-6
1.3 2.5-inch Hard Disk Drive...........................................................................................1-8
1.4 Optical device Drives.................................................................................................1-9
1.4.1 DVD-ROM & CD-RW ............................................................................... 1-9
1.4.2 DVD-ROM................................................................................................1-10
1.4.3 DVD Super Multi Double Layer...............................................................1-11
1.5 Power Supply...........................................................................................................1-12
1.6 Batteries ...................................................................................................................1-14
1.6.1 Main Battery..............................................................................................1-15
1.6.2 RTC battery...............................................................................................1-16

1 Hardware Overview
1-iv [CONFIDENTIAL] Tecra A5 Maintenance Manual
Figures
Figure 1-1 2.5-inch HDD................................................................................................ 1-8
Figures
Table 1-1 2.5-inch HDD specifications......................................................................... 1-8
Table 1-2 DVD-ROM & CD-RW drive specifications................................................. 1-9
Table 1-3 DVD-ROM drive specifications.................................................................. 1-10
Table 1-4 DVD Super Multi Double Layer drive specifications................................. 1-11

1.1 Features 1 Hardware Overview
Tecra A5 Series Maintenance Manual [CONFIDENTIAL] 1-1
1.1 Features
The Tecra A5 Series Personal Computer uses extensive Large Scale Integration (LSI), and
Complementary Metal-Oxide Semiconductor (CMOS) technology extensively to provide
compact size, minimum weight and high reliability. This computer incorporates the following
features and benefits:
CPU
•Intel Pentium-M Dothan 1.6GHz, 1.73GHz, 1.86GHz, 2.0GHz, and 2.13GHz
•Intel Celeron-M Dothan 1.3GHz, 1.4GHz, and 1.5GHz
•FCPGA CPU
Chipset
•Intel 915PM/915GM/910GML Express chipset for system memory controller
•ATI MOBILITY RADEON X600SE GPU with HyperMemory
•NVIDIA GeForce Go 6200 GPU with TurboCache technology
•Intel ICH6-M for PCI to LPC bridge, PCI IDE controller, Power Management
Logic
•ENE KB910Q B4 for keyboard controller, Battery Management Unit, and RTC
•Marvell 88E8053 GIGA LAN controller
•Marvell 88E8036 10/100 LAN controller
•Marvell 88SA8040 for SATA to PATA bridge
•LPC47N217/LPC47N207 Super IO IC for FIR
•LPC47N217 Super IO IC for Printer port
•ALC250_D for AC97 Codec
•TI PCI7411/PCI6411/PCI14510RGVF/PCI1510RGVF for PCMCIA controller
•TI PCI7411/PCI14510RGVF for 1394 controller
•TI PCI7411 for 5-in-1 card reader controller
Display
•14” (15:9) TFT screen with a resolution of 1280 horizontal x 768 vertical pixels,
non-CSV normal brightness, WXGA
•14” (15:9) TFT screen with a resolution of 1280 horizontal x 768 vertical pixels,
CSV normal brightness, WXGA
•14” (15:9) TFT screen with a resolution of 1280 horizontal x 768 vertical pixels,
CSV high brightness, WXGA

1 Hardware Overview 1.1 Features
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Memory
•DDR-I 333MHz specification compliant
•Two 200-pin (Jedec Standard) +2.5V SO-DIMM DDR sockets with
256MB/512MB/1GB DDR module
•Maximum upgradeable to 2GB by two 1GB SO-DIMM modules
BIOS
•1MB Flash ROM for system and keyboard BIOS
•Suspend to RAM/Disk
•Password protection (System)
•Windows 98 ready with PnP
•Various hot keys for system control
•Refreshable
•Complete ACPI 1.0B function
Power
•6 cells of Li-Ion 18650 size, smart battery pack with 4300mAH x 10.8V
•12 cells of Li-Ion 18650 size smart battery pack with 8600mAH x 10.8V
•4 hours charging time to 100% capacity on 4300mAH Li-Ion battery
(System off or Suspend)
•4 hours charging time to 100% capacity on 8600mAH Li-Ion battery
(System off or Suspend)
HDD
•9.5mm, 2.5" HDD up to 120 GB
•Bus Master IDE
•9.5m/m, 2.5”HDD Support
•Support Ultra 100 synchronous DMA
Fixed Device Drivers
•5.25” 12.7mm height, DVD-ROM & CD-RW combo device
•5.25” 12.7mm height, DVD-ROM device
•5.25” 12.7mm height, DVD Super-multi device
Optional Devices
•128MB/256MB/512MB/1024MB SO-DIMM DDR modules

1.1 Features 1 Hardware Overview
Tecra A5 Series Maintenance Manual [CONFIDENTIAL] 1-3
•VGA controller NV44MV with 32MB/64MB VRAM or M24C with 64MB/128MB
VRAM
•MINI PCI wireless module (802.11g: Atheros MB43/MB51, Intel Calexico2;
802.11a/g: Atheros MB44, Intel Calexico2)
•Dual-band built-in antenna for wireless LAN communication
•MDC Modem
•Mini PCI module (Analog TV tuner)
•External USB remote control devices
Keyboard
The computer's keyboard layouts are compatible with a 101/102-key enhanced keyboard.
There are five types of keys: typewriter keys, keypad overlay, function keys, soft keys
and cursor control keys. The typewriter keys and keypad overlay keys are gray. The other
keys are dark gray.
Touch Pad
This pointing control device, located in the center of the keyboard palm-rest, provides
convenient control of the cursor without requiring desk space for a mouse. The Touch
Pad incorporates two mouse (left and right) buttons for universal usage.
I/O Ports
•Four USB (V2.) ports
•One DDC2b compliant 15-pin VGA port
•One S-Video port
•One microphone/mono-in port
•One headphone-out jack
•VR volume control
•Wireless communication switch
•FIR
•One DC-in jack
•One RJ-11 jack for 56kbps V.92 modem
•One RJ-45 jack with LED indicator
•Kensington lock
•One IEEE 1394 port
•One 5-in-1 push-push type flash card connector
•One type II PCMCIA slot with shutter door
•One infrared (IrDA 1.1) port
•One TV outs-video port (4-pin), compatible with PAL or NTSC TV standard

1 Hardware Overview 1.1 Features
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PCMCIA Card Organization
•One type II card socket
•SRAM, OTPROM, FLASH ROM, mask ROM memory card up to 64MB
•Modem/LAN card
•CardBus card
•ACPI 1.0B compliant
•Supports SD/MMC/MS/MS Pro/xD formats
•High speed SD support
•SD-IO supported
•1.8" 10.5mm removable ATA device
•CardBus card or PC card with hot insertion and removal
•Support 5V/3.3V PC Cards and 3.3V Cardbus cards
•Supports PCMCIA-ATA Specification
Multiple Digital Media Card Slot
•TI PCI4510R Card Bus PCMCIA control or TI PCI7411 Card Bus PCMCIA
control
•Supports xD, SD, MS, MS Pro and MMC
Universal Serial Bus (USB)
The computer has four Universal Serial Bus (USB) ports that comply with the USB 2.0
standard, which enable data transfer speeds more than 40 times faster than USB 1.1
(which this computer also supports.) The USB drives may be used to transfer data at low,
full, and high speeds.
External monitor port
A 15-pin CRT port supporting DDC 2B enables connection of an external monitor, which
is recognized automatically by Video Electronics Standards Association (VESA) Display
Data Channel (DDC) compatible functions.
Sound system
Windows®compatible sound system provides internal speakers as well as jacks for an
external microphone and headphone.
LAN port
The computer comes with an RJ-45 Local Area Network (LAN) port. The LAN port
provides connectivity for LAN.
Switches
•Power button
•Presto or Vivace from power off, WMP9 (programmable) on Windows

1.1 Features 1 Hardware Overview
Tecra A5 Series Maintenance Manual [CONFIDENTIAL] 1-5
•Internet Explorer (programmable)
•Play/Pause
•Stop
•Fast forward
•Fast rewind
Excellent power management function
•Standby mode, Suspend to RAM or Suspend to disk mode, using time out or hot
key
•HDD local standby mode by time out
•LCD local standby mode by time out
•Low battery alarm by beep
•Auto-backlight off when LCD cover closed
•Full ACPI 1.0B supported
•LCD auto-dim mode by time out

1 Hardware Overview 1.2 System Unit
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1.2 System Unit
The system unit is composed of the following major components:
Processor (depending on the model you purchased)
•Mobile Intel®Celeron®M Processor 350J/360J/370 or
•Intel®Pentium®M Processor 725A/730/740/750/760/770
System Logic
•Mobile Intel 915PM/915GM and 910GML Express Chipset host bridge/controller
processor with host bus support
•Integrated DRAM controller
•Integrated VGA controller
•Intel ICH6-M for PCI to LPC Bridge, PCI IDE controller, Power Management
Logic.
•PCI bus interface
•Power management functions
•Supports DMI
Keyboard Controller
•ENE KB910 B4 is used for keyboard controller, battery management unit, and RTC.
Memory
•System DRAM
•Two JEDEC standard 200-pin, 2.5V DDR I SO-DIMM memory support for
256MB/512MB/1024MB/2048MB.
•ROM BIOS for system and keyboard
•1MB Flash ROM
•Slot: 2 SO-DIMM up to 1GB can be upgraded through memory expansion slot.
You need to remove existing SO-DIMM if SO-DIMM is installed in memory
expansion slot. Maximum upgradeable system memory depends on the model.
•L2 Cache: 1MB L2 Cache (Intel® Celeron® M Processor) 2MB L2 Cache (Intel®
Pentium® M Processor)
•Video RAM: Depending on the model. Up to128 MB integrated solution and
shared with main memory for Intel® 915GM/ 910GML Express; External
64/128MB VGA DDR RAM for ATI MOBILITY™ RADEON® X600SE GPU;
32/64MB VGA DDR RAM for nVIDIA GeForce Go 6200