Toshiba Satellite A70 User manual

Toshiba Personal Computer
Satellite A70
Maintenance Manual
TOSHIBA CORPORATION

ii Satellite A70 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 Satellite SATELLITE A70 Maintenance Manual
First edition September 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 A70 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.

Satellite A70 Maintenance Manual iii
Preface
This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer Satellite SATELLITE A70/A75, referred to as the A70 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 Satellite A70 Maintenance Manual
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the A70 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

Satellite A70 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 Satellite A70 Maintenance Manual

Satellite A70 Maintenance Manual vii
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 .......................................................................................... 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 Printer Port Troubleshooting ......................................................................................... 2-21
2.9 TouchPad Troubleshooting............................................................................................ 2-23
2.10 Speaker Troubleshooting ............................................................................................... 2-25
2.11 Optical Drive Troubleshooting ...................................................................................... 2-27
2.12 Modem Troubleshooting................................................................................................ 2-30
2.13 PCMCIA Troubleshooting............................................................................................. 2-32
2.14 IEEE 1394 Troubleshooting .......................................................................................... 2-34
2.15 Wireless LAN Troubleshooting..................................................................................... 2-36

viii Satellite A70 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 ...............................................................................................................3-7
3.5 PIO Loopback Test...........................................................................................................3-8
3.6 IEEE 1394 Test ................................................................................................................3-9
3.7 Speaker Audio Test ........................................................................................................3-10
3.8 Fan ON/OFF Test...........................................................................................................3-11
3.9 Main Battery Charge Test ..............................................................................................3-12
3.10 FDD Test ........................................................................................................................3-13
3.11 CD-ROM Test ................................................................................................................3-14
3.12 Keyboard Test ................................................................................................................3-15
3.13 Mouse (Pad) Test ...........................................................................................................3-17
3.14 LCD Pixels Mode Test...................................................................................................3-19
3.15 Lid Switch Test ..............................................................................................................3-20
3.16 HDD R/W Test...............................................................................................................3-21
3.17 LAN Test........................................................................................................................3-23
3.18 RTC Test ........................................................................................................................3-25
3.19 CD Control Button Test .................................................................................................3-26

Satellite A70 Maintenance Manual 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 Optical Drive Module .................................................................................................... 4-13
4.6 Optical Drive.................................................................................................................. 4-15
4.7 Wireless LAN Unit ........................................................................................................ 4-17
4.8 Expansion Memory........................................................................................................ 4-20
4.9 Keyboard........................................................................................................................ 4-23
4.10 Modem ........................................................................................................................... 4-26
4.11 Display Assembly .......................................................................................................... 4-28
4.12 Touch Cover................................................................................................................... 4-31
4.13 Touch Pad ...................................................................................................................... 4-34
4.14 Speakers ......................................................................................................................... 4-36
4.15 System Board ................................................................................................................. 4-37
4.16 Fan, Heat Sink, & CPU.................................................................................................. 4-39
4.17 Display Mask ................................................................................................................. 4-42
4.18 LCD Module .................................................................................................................. 4-44
4.19 FL Inverter Board .......................................................................................................... 4-47

x Satellite A70 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

Chapter 1
Hardware Overview
1

1 Hardware Overview
1-ii Satellite A70 Series Maintenance Manual

1 Hardware Overview
Chapter 1 Contents
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
1.4.1 DVD-R/-RW Drive ................................................................................... 1-10
1.4.2 DVD-ROM Drive...................................................................................... 1-12
1.4.3 DVD+-R/DVD+-RW Drive ...................................................................... 1-14
1.4.4 DVD Super Multi Drive............................................................................ 1-15
1.5 Power Supply ........................................................................................................... 1-16
1.6 Batteries ................................................................................................................... 1-18
1.6.1 Main Battery.............................................................................................. 1-18
1.6.2 RTC battery............................................................................................... 1-19
Satellite A70 Series Maintenance Manual 1-iii

1 Hardware Overview
1-iv Satellite A70 Series Maintenance Manual

1.1 Features 1 Hardware Overview
1.1 Features
The Satellite A70 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®Celeron®Processor up to 2.8 GHz
• Mobile Intel®Pentium®4 Processor up to 3.06GHz
• Mobile Intel®Pentium®4 Processor up to 3.2GHz supporting HT Technology
• Mobile Intel®Pentium®4 Processor up to 538 or higher supporting HT Technology
• Micro FC-PGA package CPU
 Chipset
• ATI Mobility RadeonTM 9000IGP
• ATI IXP150
• ENE KB910 for Keyboard Controller, Battery management Unit, and RTC.
• ENE CB1410 for Card Bus PCMCIA controller or CB714 for Card Bus PCMCIA
controller with Multiple Digital Media Card Slot
• ALC250 for AC97 CODEC.
• TI TSB43AB21A for IEEE 1394 controller.
• Realtek RTL8100CL on board LAN.
 Memory
• On board memory with 256MB or 512 MB supporting.
• Maximum system memory up to 1.5GB (one 1GB SO-DIMM module and 512MB
on board RAM).
• 128KB L2 Cache (Intel®Celeron®Processor up to 2.8GHz)
• 512KB L2 Cache (Mobile Intel®Pentium®4 Processor up to 3.2GHz)
• 1MB L2 Cache (Mobile Intel®Pentium®4 Processor up to 538 or higher)
• 16, 32, 64 or 128 MB of system memory is provided for video display
Satellite A70 Series Maintenance Manual 1-1

1 Hardware Overview 1.1 Features
 BIOS
• 512KB Flash ROM for system BIOS.
• Suspend to RAM/Disk.
• Password protection (System).
• Various hot key for system control.
• Refreshable
• Complete ACPI 1.0b Function
 Power
• 12-cell Li-Ion smart battery pack with 14.8V*6450mAh capacity or 8-cell Li-Ion
smart battery pack with 14.8V*4300mAh capacity (depending on the models)
• Approximately 12 hours or longer charging time to 100% battery capacity (system
on).
• Approximately 4 hours charge time to 100% battery capacity (system off)
• Approximately 2.6 days discharge time in standby mode for 12-cell battery and 1.7
days for 8-cell battery.
• Discharge time in shutdown mode is approximately 1 month.
 HDD
• One 2.5", 9.5mm hard disk with capacity 30GB/40GB/60GB/80GB
• Bus Master IDE
• 9.5mm, 2.5”HDD Support
• Support Ultra 100 synchronous DMA
 ODD Devices
One of the following:
• 5.25” 12.7mm height DVD-ROM drive
• 5.25” 12.7mm height CD-RW/DVD-ROM drive
• 5.25” 12.7mm height DVD-R/-RW drive
• 5.25” 12.7mm height DVD±R/±RW drive
• 5.25” 12.7mm height DVD Super Multi drive
 Optional Devices
• PC2700 256MB/512MB/1GB SO-DIMM modules
• MINI PCI module(802.11g,802.11a+g wireless LAN module)
 Keyboard
An easy-to-use 87-key keyboard provides a numeric keypad overlay for fast numeric data
entry or for cursor and page control. It supports software that uses a 101- or 102-key
enhanced keyboard. Includes one Windows®key and one Application key.
1-2 Satellite A70 Series Maintenance Manual

1.1 Features 1 Hardware Overview
 TouchPad
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 TouchPad
incorporates two mouse buttons.
 Display
• 15.4-inch WXGA TFT screen, 1280×800 pixels, Response time 50ms (typ.);
For Normal LCD-Contrast ratio 300:1 (typ.); Brightness 168 Nit (typ.)
• 15.4-inch WXGA TFT screen, 1280×800 pixels, Response time 50ms (typ.);
For Hight brightness CSV-Contrast ratio 600:1 (typ.); Brigntness 220 Nit(typ.)
 I/O Ports
• One 25 pins Parallel port, EPP/ECP Capability
• One 15 pins CRT port, Support DDC 2B
• One TV-out connector
• One MIC In port
• One headphone-out
• One 2pins AC Adapter Jack
• One type II PCMCIA Card Bus slots
• Three 4 pins USB ports
• One RJ11/RJ45 Port
• VR for volume control
• IrDA Port
• 1394 Port
• Multiple Digital Media Card Slot (SD/MMC/SM/MS/MS Pro/xD)
• One 10/100T Ethernet Port
 PCMCIA Card Organization
• One type II card socket only
• SRAM, OTPROM, FLASH ROM
• Mask ROM memory card
• MODEM/LAN card
• Card bus card
• PC Card 8.0 Compliant, supports 3V and 5V cards
 Multiple Digital Media Card
• Supports SD/MMC/SM/MS/MS Pro/xD card
• SD memory capacity support from 8MB to 512MB
• MMC memory capacity support from 8MB to 256MB
• SM memory capacity support from 4MB to 128MB
• MS memory capacity support from 8MB to 256MB
• MS Pro memory capacity support from 256MB to 1GB
• xD memory capacity support from 4MB to 512MB
 Universal Serial Bus (USB)
Satellite A70 Series Maintenance Manual 1-3

1 Hardware Overview 1.1 Features
The computer comes with three USB ports that comply with Universal Host Controller
Interface (UHCI). The USB enables daisy-chain connection of up to 127 USB-equipped
devices. It is designed for easy configuration by a Plug-and-Play operating system and
provides hot insertion/ejection capability.
 Parallel port
A 25-pin parallel port enables connection of a printer or other parallel device. The port
supports Extended Capabilities Port (ECP) conforming to IEEE-1284 and is Enhanced
Parallel Port (IEEE 1284) compliant. It features ChiProtect circuitry for protection against
damage due to printer power-on.
 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
A Cirrus logic ALC250 for AC97 codec audio subsystem offers industry leading mixed
signal technology to enhance the computer’s multimedia capability. The sound system is
equipped with stereo speakers and jacks for headphone and external microphone.
 TV-out port
This video-out mini-jack enables transfer of NTSC or PAL data (video and right/left
audio) to external devices such as a TV.
 LAN port
The computer comes with an RJ-45 Local Area Network (LAN) port. The LAN port
provides connectivity for LAN.
 Programmable button
When system is off, pressing this button will turn on CD Playback mode. Pressing this
button again will turn off CD Playback mode. When system is turned on, pressing this
button will launch the program which you defined with Programmable Button utility.(The
default setting is Windows Media Player)
1-4 Satellite A70 Series Maintenance Manual

1.2 System Unit 1 Hardware Overview
1.2 System Unit
The system unit is composed of the following major components:
 Processor
• Intel®Celeron®Processor up to 2.8 GHz
• Mobile Intel®Pentium®4 Processor up to 3.06GHz
• Mobile Intel®Pentium®4 Processor up to 3.2GHz supporting HT Technology
• Mobile Intel®Pentium®4 Processor up to 538 or higher supporting HT Technology
• Micro FC-PGA package CPU
 System Logic
• ATI Mobility RADEON™ 9000IGP/216CLS3BGA21H
• Integrated DRAM controller
• Hub Interface to ATI IXP150/218S2EBNA43
• Power Management Functions
 Keyboard Controller
• KB910 is use as keyboard controller and battery management unit
 Memory
• System DRAM
• One JEDEC standard 200-pins DDR SO-DIMM memory support +2.5V
PC2700 128/256/512MB/1024MB.
• System & KB Combine ROM BIOS
• 512KB Flash ROM
 Video Subsystem (ATI Mobility RADEON™)
• UMA VGA Memory up to 128MB
• Display Core Frequency of 200/250/266/333MHZ
• 3D Graphics Engine
• Analog Display support
• Digital Video out port(DVOB and DVOC)support
• DVOB With 165-MHZ clot clock support for 12 bit interface.
• Dedicated 2FP(local flat panel) interface
• Single or dual channel LVDS panel support up to WXGA panel, resolution with
frequency range from 25MHZ to 112MHZ per channel.
 SMsC LPC 47N217 Super I/O with LPC Interface
• PC99a, PC2001
• ACPI 2.0 Compliant
Satellite A70 Series Maintenance Manual 1-5

1 Hardware Overview 1.2 System Unit
• Serial Ports
• One Full Function Serial Port
• High Speed NS 16C550A Compatible UARTs with Send/Receive 16-Byte FIFO
• Supports 230k and 460k Baud
• Programmable Baud Rate Generator
• Modem Control Circuitry
• Infrared Communications Controller
• IrDA v1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support
• 1 IR Ports
• 96 Base I/O Address, 15 IRQ Options and 3 DMA Options
• Multi-Mode Parallel Port with ChiProtect
• Standard Mode IBM PC/XT , PC/AT, and PS/2 Compatible Bidirectional Parallel
Port
• Enhanced Parallel Port (EPP)
Compatible – EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)
• IEEE 1284 Compliant Enhanced Capabilities Port (ECP)
• ChiProtect Circuitry for Protection Against Damage Due to Printer Power-On
• 192 Base I/O Address, 15 IRQ and 3 DMA Options
• LPC Bus Host Interface
• Multiplexed Command, Address and Data Bus
• 8-Bit I/O Transfers
• 8-Bit DMA Transfers
• 16-Bit Address Qualifiation
• Serial IRQ Interface Compatible with Serialized Serial IRQ Interface Compatible
with Serialized IRQ Support for PCI Systems
• PCI CLKRUN# Support
• Power Management Event (IO_PME#) Interface Pin
 Audio subsystem
• Realtek ALC250 for AC97 codec
− AC 97 2.2 Compatible.
− Industry Leading Mixed Signal Technology.
− 20-bit Stereo Digital-to-Analog Converters.
− 18-bit Stereo Analog-to- Digital Converters.
− Sample Rate Converters.
− Four Analog Line-level Stereo Inputs for LIN_IN, CD, VIDEO, and AUX.
− Two Analog Line-level Mono Inputs for Modem and Internal PC Beep.
− Dual Stereo Line-level Outputs for LINE_OUT and ALT_LINE _OUT.
− Dual Microphone Inputs.
− High Quality Differential CD Input.
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