Toshiba satellite a40 Service Manual v1
Toshiba Personal Computer
Satellite A40 Series
Maintenance Manual
TOSHIBA CORPORATION
File Number 960-458
Copyright
© 2003 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 A40 Series Maintenance Manual
First edition December 2003
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 Satellite A40 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
Intel, Intel SpeedStep, Pentium and Celeron are trademarks or registered trademarks of Intel
Corporation or its subsidiaries in the United States and other countries/regions.
Windows and Microsoft are registered trademarks of Microsoft Corporation.
Photo CD is a trademark of Eastman Kodak.
i Link is a trademark of Sony Corporation.
TruSurround XT, Trubass, Dialog Clarity, SRS and (•)symbol are trademarks of SRS Labs, Inc.
TruSurround XT technology is in corporated under license from SRS Labs, Inc.
Other trademarks and registered trademarks not listed above may be used in this manual.
ii Satellite A40 Maintenance Manual (960-458)
Preface
This maintenance manual describes how to perform hardware service maintenance for the Toshiba
Personal Computer Satellite A40 Series.
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.
q 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.
q 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.
Satellite A40 Maintenance Manual (960-458) iii
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the Satellite A40 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:
q Handling the LCD module
q Board layout
q Pin assignments
q Keyboard scan/character codes
q Key layout
q Wiring diagrams
q BIOS Rewrite Procedures
q Reliability
iv Satellite A40 Maintenance Manual (960-458)
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
Satellite A40 Maintenance Manual (960-458) v
Table of Contents
Chapter 1 Hardware Overview
1.1 Features.......................................................................................................................1-1
1.2 System Unit Block Diagram..........................................................................................1-6
1.3 USB 3.5-inch Floppy Disk Drive................................................................................1-12
1.4 2.5-inch Hard Disk Drive ...........................................................................................1-13
1.5 DVD-ROM Drive......................................................................................................1-18
1.6 CD-RW/DVD-ROM Drive ......................................................................................1-20
1.7 DVD-R/-RW Drive ...................................................................................................1-23
1.8 DVD±RW (DVD Dual) Drive ...................................................................................1-25
1.9 DVD-Multi (CD-R/RW DVD-RAM/R/RW) Drive ....................................................1-27
1.10 Keyboard..................................................................................................................1-29
1.11 TFT Color Display.....................................................................................................1-30
1.12 Power Supply............................................................................................................1-32
1.13 Batteries ....................................................................................................................1-34
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting ...........................................................................................................2-1
2.2 Troubleshooting Flowchart...........................................................................................2-2
2.3 Power Supply Troubleshooting.....................................................................................2-6
2.4 System Board Troubleshooting...................................................................................2-18
2.5 FDD Troubleshooting.................................................................................................2-34
2.6 HDD Troubleshooting................................................................................................2-37
2.7 Keyboard Troubleshooting.........................................................................................2-42
2.8 Display Troubleshooting.............................................................................................2-44
2.9 Optical Drive Troubleshooting....................................................................................2-47
2.10 Modem Troubleshooting ............................................................................................2-49
2.11 LAN Troubleshooting ................................................................................................2-51
2.12 Wireless LAN Troubleshooting...................................................................................2-52
vi Satellite A40 Maintenance Manual (960-458)
2.13 Sound Troubleshooting...............................................................................................2-56
2.14 SD Card Slot Troubleshooting....................................................................................2-59
Chapter 3 Tests and Diagnostics
3.1 The Diagnostic Test......................................................................................................3-1
3.2 Executing the Diagnostic Test .......................................................................................3-3
3.3 Subtest Names.............................................................................................................3-8
3.4 System Test...............................................................................................................3-10
3.5 Memory Test.............................................................................................................3-13
3.6 Keyboard Test...........................................................................................................3-14
3.7 Display Test...............................................................................................................3-17
3.8 Floppy Disk Test .......................................................................................................3-20
3.9 Printer Test................................................................................................................3-22
3.10 Hard Disk Test ..........................................................................................................3-24
3.11 Real Timer Test..........................................................................................................3-28
3.12 NDP Test..................................................................................................................3-30
3.13 Expansion Test...........................................................................................................3-31
3.14 CD-ROM/DVD-ROM Test ......................................................................................3-33
3.15 LAN Test..................................................................................................................3-34
3.16 Error Code and Error Status Names...........................................................................3-35
3.17 Hard Disk Test Detail Status ......................................................................................3-38
3.18 Head Cleaning ...........................................................................................................3-40
3.19 Log Utilities................................................................................................................3-41
3.20 Running Test..............................................................................................................3-43
3.21 Floppy Disk Drive Utilities..........................................................................................3-45
3.22 System Configuration.................................................................................................3-50
3.23 Setup.........................................................................................................................3-52
3.24 Repair initial config set................................................................................................3-68
3.25 Wireless LAN Test Program (Agere) .........................................................................3-69
3.26 Wireless LAN Test Program (Atheros 11b/g or 11a/g)...............................................3-73
3.27 Sound/LAN/Modem Test Program............................................................................3-76
Satellite A40 Maintenance Manual (960-458) vii
3.28 IEEE1394 Test Program............................................................................................3-80
3.29 Thermal Radiation Control Test ..................................................................................3-81
viii Satellite A40 Maintenance Manual (960-458)
Chapter 4 Replacement Procedures
4.1 General........................................................................................................................4-1
4.2 Battery pack................................................................................................................4-8
4.3 PC card.....................................................................................................................4-10
4.4 SD card.....................................................................................................................4-12
4.5 HDD .........................................................................................................................4-13
4.6 Heat sink/CPU...........................................................................................................4-16
4.7 Optical drive ..............................................................................................................4-20
4.8 Keyboard..................................................................................................................4-23
4.9 Memory module.........................................................................................................4-26
4.10 Wireless LAN board/Modem Daughter Card.............................................................4-28
4.11 CD/DVD (Audio) play button....................................................................................4-33
4.12 Display assembly........................................................................................................4-34
4.13 Touch pad .................................................................................................................4-38
4.14 LED board ................................................................................................................4-40
4.15 RTC battery...............................................................................................................4-42
4.16 Sound board..............................................................................................................4-44
4.17 System board/Bat con cover ......................................................................................4-46
4.18 Fan............................................................................................................................4-49
4.19 Modem cable.............................................................................................................4-51
4.20 Wireless LAN cover..................................................................................................4-52
4.21 Battery lock assembly ................................................................................................4-53
4.22 Speaker.....................................................................................................................4-54
4.23 Display mask/LCD unit/FL inverter.............................................................................4-57
4.24 LCD cable/Sensor switch/Wireless LAN antenna .......................................................4-61
4.25 Hinge.........................................................................................................................4-65
4.26 Fluorescent Lamp ......................................................................................................4-69
Satellite A40 Maintenance Manual (960-458) 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 Wiring Diagrams ..............................................................................................F-1
Appendix G BIOS Rewrite Procedures............................................................................... G-1
Appendix H EC/KBC Rewrite Procedures ......................................................................... H-1
Appendix I Reliability..........................................................................................................I-1
x Satellite A40 Maintenance Manual (960-458)
Satellite A40 Maintenance Manual (960-458) xi
Chapter 1 Hardware Overview
1 Hardware Overview
1-ii Satellite A40 Maintenance Manual (960-458)
1 Hardware Overview
Chapter 1 Contents
1.1 Features ...................................................................................................................... 1-1
1.2 System Unit Block Diagram......................................................................................... 1-6
1.3 USB 3.5-inch Floppy Disk Drive ............................................................................... 1-12
1.4 2.5-inch Hard Disk Drive........................................................................................... 1-13
1.5 DVD-ROM Drive ..................................................................................................... 1-18
1.6 CD-RW/DVD-ROM Drive ...................................................................................... 1-20
1.7 DVD-R/-RW Drive ................................................................................................... 1-22
1.8 DVD±RW (DVD Dual) Drive ................................................................................... 1-25
1.9 DVD-Multi (CD-R/RW DVD-RAM/R/RW) Drive .................................................... 1-27
1.10 Keyboard.................................................................................................................. 1-29
1.11 TFT Color Display..................................................................................................... 1-30
1.11.1 LCD Module ....................................................................................... 1-30
1.11.2 FL Inverter Board................................................................................ 1-31
1.12 Power Supply............................................................................................................ 1-32
1.13 Batteries.................................................................................................................... 1-34
1.13.1 Main Battery........................................................................................ 1-34
1.13.2 Battery Charging Control...................................................................... 1-35
1.13.3 RTC battery......................................................................................... 1-36
Satellite A40 Maintenance Manual (960-458) 1-iii
1 Hardware Overview
Figures
Figure 1-1 Front of the computer.......................................................................................1-5
Figure 1-2 System unit configuration..................................................................................1-5
Figure 1-3 System unit block diagram................................................................................1-6
Figure 1-4 3.5-inch FDD (USB External) ........................................................................1-12
Figure 1-5 2.5-inch HDD................................................................................................1-13
Figure 1-6 DVD-ROM drive ..........................................................................................1-18
Figure 1-7 CD-RW/DVD-ROM drive ............................................................................1-20
Figure 1-8 DVD-R/-RW drive ........................................................................................1-23
Figure 1-9 DVD±RW drive ............................................................................................1-25
Figure 1-10 DVD-Multi drive............................................................................................1-27
Figure 1-11 Keyboard......................................................................................................1-29
Figure 1-12 LCD module..................................................................................................1-30
Tables
Table 1-1 3.5-inch FDD specifications ...........................................................................1-12
Table 1-2 2.5-inch HDD dimensions ..............................................................................1-13
Table 1-3 2.5-inch HDD specifications...........................................................................1-15
Table 1-4 DVD-ROM drive specifications .....................................................................1-18
Table 1-5 CD-RW/DVD-ROM drive specifications .......................................................1-20
Table 1-6 DVD-R/-RW drive specifications ...................................................................1-23
Table 1-7 DVD±RW drive specifications .......................................................................1-26
Table 1-8 DVD-Multi drive specifications.......................................................................1-27
Table 1-9 LCD m odule specifications.............................................................................1-30
Table 1-10 FL inverter board specifications......................................................................1-31
Table 1-11 Power supply output rating.............................................................................1-33
Table 1-12 Battery specifications......................................................................................1-34
Table 1-13 Time required for quick charges......................................................................1-35
Table 1-14 RTC battery charging/data preservation time...................................................1-36
1-iv Satellite A40 Maintenance Manual (960-458)
1 Hardware Overview
Satellite A40 Maintenance Manual (960-458) 1-v
1.1 Features 1 Hardware Overview
1 Features
1.1 Features
The Toshiba Satellite A40 Personal Computer is a high performance all-in-one PC running a
Pentium 4 or Celeron processor.
q Microprocessor
Intel Mobile Pentium 4 Processor (Northwood)
A 2.40GHz, 2.66GHz, 2.80GHz, 3.06GHz or 3.20GHz Pentium 4 processor (Northwood)
with a 2.40GHz, 2.66GHz, 2.80GHz, 3.06GHz or 3.20GHz internal clock, 533MHz bus
and 1.525/1.20V core operation
Intel Mobile Pentium 4 Processor (Prescott)
A 2.66GHz, 2.80GHz, 3.06GHz, 3.20GHz or 3.46GHz Pentium 4 processor (Prescott)
with a 2.66GHz, 2.80GHz, 3.06GHz, 3.20GHz or 3.46GHz internal clock, 533MHz bus
and 1.35/1.15V core operation
Intel Mobile Celeron
A 2.40GHz, 2.50GHz, 2.60GHz, 2.70GHz or 2.80GHz Celeron processor with a 2.40GHz,
2.50GHz, 2.60GHz, 2.70GHz or 2.80GHz internal clock, 400MHz bus and 1.525V core
operation
q Chipset
The Satellite A40 is equipped with Intel Montara-GT, Intel ICH4-M and YEBISU-SS.
q Cache Memory
Intel Mobile Pentium 4 Processor (Northwood)
12KB primary cache (in CPU) and 512KB secondary cache (in CPU)
Intel Mobile Pentium 4 Processor (Prescott)
12KB primary cache (in CPU) and 1024KB secondary cache (in CPU)
Intel Mobile Celeron
12KB primary cache (in CPU) and 128KB secondary cache (in CPU)
q GPU
GPU is mounted in the Montara-GT. The internal VRAM is 64M UMA (max).
Satellite A40 Maintenance Manual (960-458) 1-1
1 Hardware Overview 1.1 Features
q Memory
Two DDR SO-DIMM slots are available for installation of PC2700 compatible 256, 512MB
and 1GB memory modules. The memory is expandable up to 2GB.
q Built-in HDD
The computer has a 30GB, 40GB, 60GB or 80GB internal drive of 2.5 inch x 9.5mm height.
q USB FDD
An external two-mode 3.5-inch FDD, which connects with a USB port, supports 720KB and
1.44MB formats and enables booting from system FD.
q DVD-ROM Drive
This drive accommodates either 12 cm (4.72-inch) or 8 cm (3.15-inch) CD, CD-R/RW and
DVD. It is a high-performance drive that reads DVD at maximum 8-speed, and reads CD at
maximum 24-speed (3,600 KB per second).
q CD-RW/DVD-ROM Drive
This drive is a combination of DVD-ROM and CD-R/RW Drive. It is full-size and runs either
12cm (4.72-inch) or 8cm (3.15-inch) DVD/CDs without an adaptor. This drive reads CDROM at maximum 24-speed, reads DVD-ROM at maximum 8-speed.
q DVD-R/-RW Drive
A full-size DVD-R/-RW drive module lets you record data to rewritable CD/DVD as well as
run either 12 cm (4.72-inch ) or 8 cm (3.15-inch) CD/DVD without using an adaptor. It is a
high-performance drive that reads DVD at maximum 8-speed, writes DVD-R/-RW at 1-speed,
and reads CD at maximum 24-speed (3,600 KB per second).
q DVD±RW Drive
This full size DVD±RW drive module lets you record data to rewritable CD/DVDs as well as
run either 12 cm (4.72-inch ) or 8 cm (3.15-inch) CD/DVD without using an adaptor. It is a
high-performance drive that reads DVD at maximum 8-speed, writes DVD-R/-RW at 2-speed,
DVD+R/+RW at 2.4-speed and reads CD at maximum 24-speed (3,600 KB per second).
q DVD Multi Drive
This drive is a combination of CD-R/RW, DVD-R/-RW and DVD-RAM Drive. It is full-size
and runs either 12cm (4.72-inch) or 8cm (3.15-inch) DVD/CD without an adaptor. It is a highperformance drive that reads DVD at maximum 8-speed, writes DVD-R/-RW at 1-speed, and
reads CD at maximum 24-speed (3,600 KB per second).
1-2 Satellite A40 Maintenance Manual (960-458)
1.1 Features 1 Hardware Overview
q Display
The display comes in the following three types:
• 14.1-inch XGA TFT LCD (1024 × 768 pixels with 16M colors)
• 15.0-inch XGA TFT LCD (1024 × 768 pixels with 16M colors)
• 15.0-inch SXGA+ TFT LCD (1400 × 1050 pixels with 16M colors)
q Keyboard
An easy-to-use 85(US)-/86(UK)-key keyboard (101 Key emulation). A Windows key is
supported.
q Touch pad
A touch pad is installed as a pointing device.
q Batteries
A RTC battery is mounted inside the computer.
The main battery is a detachable lithium ion battery (8,400mAh: Li-Ion, 12cell).
q USB (Universal Serial Bus)
The computer has four USB ports, which support USB2.0.
q IEEE 1394 port
The computer comes with one IEEE 1394 port. It enables high-speed data transfer directly
from external devices such as digital video cameras.
q Parallel port
The parallel port enables connection of parallel printer or other parallel devices (ECP
compatible).
q External monitor port
The port enables connection of an external monitor, which is recognized automatically by Video
Electronics Standards Association (VESA) Display Data Channel (DDC) 2B compatible
functions.
q PC card slot
The PC card slot accepts one Type II (5mm thick) card. The slot is equipped with an ejector
and supports ToPIC-100 (3.3V/CardBus).
Satellite A40 Maintenance Manual (960-458) 1-3
1 Hardware Overview 1.1 Features
q SD Card
The SD Card Slot can accommodate Secure Digital flash memory cards with various capacities.
SD cards let you easily transfer data from devices, such as digital cameras and Personal Digital
Assistants, which use SD Card flash-memory .
q Sound system
The sound system is equipped with the following features:
• AC 97 Link
• Sound CODEC: Analog Devices 1981B
• Stereo speakers
• Volume control knob
• Stereo Headphone jack
• External microphone jack
q Video-out jack (in some models, there is no Video-out jack)
The video jack enables to transfer NTSC or PAL data to external devices connected with SVideo cable.
θ LAN (Intel-made)/MODEM (Askey -made)
Connectors for LAN and Modem are separately mounted.
q Wireless LAN (Mini PCI slot)
The wireless LAN (802.11b, 802.11a/b/g, or 802.11b/g Combo) is equipped on the mini PCI
slot.
1-4 Satellite A40 Maintenance Manual (960-458)
1.1 Features 1 Hardware Overview
The front of the computer is shown in figure 1-1 and the system unit configuration is shown in figure
1-2.
Figure 1-1 Front of the computer
Satellite A40 Maintenance Manual (960-458) 1-5
1 Hardware Overview 1.1 Features
Figure 1-2 System unit configuration
1-6 Satellite A40 Maintenance Manual (960-458)
1.2 System Unit Block Diagram 1 Hardware Overview
1.2 System Unit Block Diagram
Figure 1-3 is a block diagram of the system unit.
Figure 1-3 System unit block diagram
Satellite A40 Maintenance Manual (960-458) 1-7
1 Hardware Overview 1.2 System Unit Block Diagram
The system unit is composed of the following major components:
q Processor
Intel Mobile Pentium 4 Processor (Northwood)
• 2.40/2.66/2.80/3.06/3.20GHz (Internal clock: 2.40/2.66/2.80/3.06/3.20GHz, Bus:
533MHz, Core voltage: 1.525/1.20V (Battery Optimized Mode at 1.20V), Built-in
NDP)
• Internal cache memory: 12KB (in CPU)
• Secondary cache memory: 512KB (in CPU)
Intel Mobile Pentium 4 Processor (Prescott)
• 2.66/2.80/3.06/3.20/3.46GHz (Internal clock: 2.66/2.80/3.06/3.20/3.46GHz, Bus:
533MHz, Core voltage: 1.35/1.15V (Battery Optimized Mode at 1.15V), Built-in
NDP)
• Internal cache memory: 12KB (in CPU)
• Secondary cache memory: 1024KB (in CPU)
Intel Mobile Celeron
• 2.40/2.50/2.60/2.70/2.80GHz (Internal clock: 2.40/2.50/2.60/2.70/2.80GHz, Bus:
400MHz, Core voltage: 1.525V, Built-in NDP)
• Internal cache memory: 12KB (in CPU)
• Secondary cache memory: 128KB (in CPU)
q Memory
Two memory slots are provided. Expansion up to 2GB is available.
• Supports DDR333
• Supports PC2700
– 256MB: 256Mbit (16M × 16bit) chips × 8
– 512MB: 512Mbit (32M × 8bit) chips × 16
– 512Mbit (32M × 16bit) chips × 8
– 1GB: 512Mbit (64M × 8 bit) chips × 16
• 200 pin, SO Dual In-line Memory Modules (SO-DIMM)
• 2.5 volt operation
1-8 Satellite A40 Maintenance Manual (960-458)
1.2 System Unit Block Diagram 1 Hardware Overview
q Intel Montara-GT (North Bridge)
• One Intel 82852GME is used.
• Features:
– Mobile Intel Pentium 4 processor and Intel Celeron processor System Bus Support
– Supports Enhanced Intel SpeedStep technology
– DRAM Controller supporting DDR333/DDR266/DDR200, 2GB max
– Accelerated Graphics Port (AGP) Interface: Supports AGP 2.0 including 1×, 2×,
and 4×
– Up to 64MB of dynamic video memory allocation
– 732-pin Micro-FCBGA (37.5×37.5 mm)
q Intel ICH4-M (South Bridge)
• One Intel 82801DBM is used.
• This gate array has the following features:
– Hub Link Interface
– PCI Rev2.2 Interface (6 PCI REQ/GNT Pairs)
– Enhanced DMA Controller, Interrupt Controller and Timer Functions
– BusMaster IDE Controller (Ultra ATA 100/66/33)
– USB 1.1/2.0 Controller 6 Ports (EHCI: Enhanced Host Controller)
– I/O APIC
– SMBus2.0 Controller
– Firmware Hub (FWH) Interface (BIOS)
– Low Pin Count (LPC) Interface (EC/KBC, Super I/O)
– Serial Interrupt Controller
– ACPI Power Management Controller
– Deeper Sleep Support
– AC'97 2.3 Interface
– Internal RTC
– Internal LAN Controller (WfM2.0)
– Alert ON LAN (AOL)
– 421-ball (31×31mm) BGA Package
Satellite A40 Maintenance Manual (960-458) 1-9
1 Hardware Overview 1.2 System Unit Block Diagram
q PC Card Controller Gate Array
• One YEBISU-SS gate array is used.
• This gate array has the following functions and components.
– PCI interface (PCI Revision2.2)
– CardBus/PC Card controller (Yenta2 Version2.2)
– SD memory card controller (SDHC Ver.1.2)
– SD IO card controller (Ver.1.0)
– SmartMedia controller (SMHC Ver.01/SMIL1.0)
– SIO (UART) controller (MS Debug Port Specification Ver.1.0)
– Docking station interface
– Q switch control, reset control
– External device interface
q BIOS ROM
• 8Mbit (Flash memory)
− 64KB used for logo
− 32KB used for setup and checksum
− 128KB used for system BIOS
− 64KB used for VGA-BIOS
− 64KB used for ACPI
− 8KB used for PnP
− 8KB used for password security
− 16KB used for booting
− 128KB are reserved
• 5.0V operation
• Access time : 120 ns or 90 ns
• Data transfer: 8-bit
1-10 Satellite A40 Maintenance Manual (960-458)
1.2 System Unit Block Diagram 1 Hardware Overview
q VGA Controller
Included in the North Bridge
q Sound Controller
AC 97’ Link (in the South Bridge) is used.
• Amplifier, internal stereo speakers, stereo headphone connector, external microphone
connector and volume control knob are mounted.
q EC/KBC (Embedded Controller/Keyboard Controller)
One SMSC LPC-47N259 micon chip functions as both EC and KBC.
• EC
This controller controls the following functions:
– Power supply sequence
– Thermal conditions
– LEDs
– Beep
– Device ON/OFF
– Fan speed
– Universal I/O port
– Docker Docking Sequence
– Battery capacity check
– Forced reset
– Flash rewriting
– EC interface
– I2C communication
– EC access
– Slim Select Bay Control
• KBC
This controller has the following functions:
– Scan controller to check status of keyboard matrix
– Interface controller between the keyboard scan controller and the system
– Control of switching and simultaneous operation of the accupoint/external PS/2
mouse and of the internal keyboard/external PS/2 keyboard
q PSC (Power Supply Controller)
• One Toshiba TMP87PM48U chip is used.
• This controller controls the power sources.
Satellite A40 Maintenance Manual (960-458) 1-11
1 Hardware Overview 1.2 System Unit Block Diagram
q Clock Generator
• One ICS 950812 is used.
• This device generates the system clock.
q Modem Controller
• One built-in Askey-made 1456VQL4A(INT) modem card
• This controller has the following functions:
– Digital line protection support
– Ring wake up support
– AC97 interface
– Supports V.92 56k Modem/Fax.
q Internal LAN Controller
• One Kinnereth (ED82562) chip is used.
– Supports 100Base-TX and 10Base-T.
– Control s LAN.
q Wireless LAN
– Mini-PCI Type III 1slot
– Supports Kill SW.
– Supports Wireless LAN through PCMCIA.
– 802.11b: Agere-made
– 802.11a/b/g, 802.11b/g: Atheros-made
q Super I/O
• One SMSC LPC 47N259 chip is used.
– Floppy Disk Controller
– Serial Port Controller
q IEEE1394
• One TSB43AB22 is used.
q Sensor
• Thermal Sensor: One ADM1032AR chip is used.
• LCD Sensor: One NRS-701-1015T is used.
1-12 Satellite A40 Maintenance Manual (960-458)
1.3 3.5-inch Floppy Disk Drive 1 Hardware Overview
1.3 USB 3.5-inch Floppy Disk Drive
The 3.5-inch USB FDD is a thin, high-performance reliable drive that supports 720KB and
1.44MB.
The FDD is shown in figure 1-4. The specifications for the FDD are listed in Table 1-1.
Figure 1-4 3.5-inch FDD (USB External)
Table 1-1 3.5-inch FDD specifications
Items 720KB mode 1.44MB mode
FDD part
rate
Disk rotation speed 300rpm 360rpm
Track density 5.3 track/mm (135TPI)
USB Full speed mode (12M bits/second)
250K bits/second
500K bits/second Data transfer
Satellite A40 Maintenance Manual (960-458) 1-13
1 Hardware Overview 1.4 2.5-inch Hard Disk Drive
1.4 2.5-inch Hard Disk Drive
The removable HDD is a random access non-volatile storage device. It has a non-removable 2.5inch magnetic disk and mini-Winchester type magnetic heads.
The computer supports a 30GB, 40GB, 60GB and 80GB HDD.
The HDD is shown in figure 1-5. Specifications are listed in Table 1-2 and 1-3.
Figure 1-5 2.5-inch HDD
Table 1-2 2.5-inch HDD dimensions (1/2)
Parameter Specifications
Outline Width (mm) 69.85
dimensions Height (mm) 9.5
Depth (mm) 100
Weight (g) 99 max. 95 max. 99 max.
TOSHIBA
HDD2181B
TOSHIBA
HDD2190B
TOSHIBA
HDD2183B
Parameter Specifications
Outline Width (mm) 69.85
dimensions Height (mm) 9.5
Depth (mm) 100
Weight (g) 102 max. 99 max.
TOSHIBA
HDD2184B
TOSHIBA
HDD2194B
TOSHIBA
HDD2188B
1-14 Satellite A40 Maintenance Manual (960-458)
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