Toshiba satellite m40, tecra a4, dynabook vx4 Service Manual

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Toshiba Personal Computer

Satellite M40/M45

TECRA A4

dynabook Vx/4

Maintenance Manual

TOSHIBA CORPORATION

S/ No.

Satellite M40/M45 TECRA A4 dynabook Vx/4 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 Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

First edition Dec. 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 Satellite M40/M45 TECRA A4 dynabook Vx/4 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 and Pentium are registered trademarks of Intel Corporation.

IBM, IBM PC/XT, PC/AT, PS/2 and OS/2 are registered trademarks of IBM Corporation. MS-DOS and Windows XP home edition are registered trademarks of Microsoft Corporation. Sound Blaster and Pro are trademarks of Creative Technology Ltd.

UNIX is a registered trademark of X/Open Company Ltd. NetWare are registered trademarks of Novell, Inc.

All other properties are trademarks or registered trademarks of their respective holders.

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

Preface

This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer Satellite M40/M45 TECRA A4 dynabook Vx/4, referred to as Satellite M40/M45 TECRA A4 dynabook Vx/4 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, RTC battery or backup 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 M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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The manual is divided into the following parts:

Chapter 1 Hardware Overview describes the Satellite M40/M45 TECRA A4 dynabook Vx/4 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

Keyboard scan/character codes

Key layout

Wiring diagrams

BIOS Rewrite Procedures

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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 XXXXX that appears on its display is presented in the type face below:

Format complete

System transferred

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Table of Contents

Chapter 1

Hardware Overview

 

1.1

Features............................................................................................................................

 

1-1

1.2

System Unit Components ..............................................................................................

1-11

1.3

2.5-inch HDD.................................................................................................................

 

1-18

1.4 DVD-ROM Drive ..........................................................................................................

1-19

1.5 CD-RW/DVD-ROM Drive............................................................................................

1-20

1.6

DVD Dual (Double Layer) ............................................................................................

1-21

1.7

DVD Super Multi...........................................................................................................

1-22

1.8

DVD Super Multi (Double Layer).................................................................................

1-23

1.9

Power Supply.................................................................................................................

 

1-24

2.0

Batteries .........................................................................................................................

 

1-25

 

1.1.1

Main Battery.......................................................................................

1-25

 

1.1.2

Battery Charging Control...................................................................

1-25

 

1.1.3

RTC Battery .......................................................................................

1-26

Chapter 2

Troubleshooting

 

2.1

Outline

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

 

2-1

2.2

Basic Flowchart......................................................................................................

2-2

2.3

Power Supply .........................................................................................................

 

2-6

 

Procedure 1 Power Icon Check...........................................................................

2-6

 

Procedure 2 Connection Check...........................................................................

2-8

 

Procedure 3 Replacement Check ........................................................................

2-8

2.4

System Board .........................................................................................................

 

2-9

 

Procedure ....................................................................3

Replacement Check

2-10

2.5

2.5-inch .......................................................................................................HDD

 

2-11

 

Procedure .............................................................................1 Message Check

2-11

 

Procedure ..........................................................................2

Partition Check

2-11

 

Procedure ..............................................................................3

Format Check

2-12

 

 

 

 

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

 

Procedure 4 Test Program Check ...................................................................

2-13

 

Procedure 5 Connector Check and Replacement Check.................................

2-14

2.6

Keyboard ..............................................................................................................

 

2-15

 

Procedure 1 Test Program Check ......................................................................

2-15

 

Procedure 2 Connector Check and Replacement Check....................................

2-15

2.7

Display .................................................................................................................

 

2-16

 

Procedure 1 External Monitor Check .............................................................

2-16

 

Procedure 2 Test Program Check ...................................................................

2-16

 

Procedure 3 Connector Check and Replacement Check.................................

2-16

2.8

ODD (Optical Disk Drive) ...................................................................................

2-18

 

Procedure 1 ODD Cleaning Check .................................................................

2-18

 

Procedure 2 Test Program Check ...................................................................

2-18

 

Procedure 3 Connector Check and Replacement Check.................................

2-18

2.9

LAN......................................................................................................................

 

2-20

 

Procedure 1 Test Program Check ...................................................................

2-20

 

Procedure 2 Connector Check and Replacement Check.................................

2-20

2.10

SD/MS/SM/MMC/XD Card(Optional)................................................................

2-21

 

Procedure 1 Test Program Check ...................................................................

2-21

 

Procedure 2

Connector Check ........................................................................

2-21

2.11

Parallel Port(Optional) .........................................................................................

2-22

 

Procedure 1 Test Program Check ...................................................................

2-22

 

Procedure 2

Connector Check ........................................................................

2-22

2.12

Audio Test ............................................................................................................

 

2-23

 

Procedure 1 Test Program Check ......................................................................

2-23

 

Procedure 2 Connector Check and Replacement Check....................................

2-23

2.13

IEEE 1394 Test(Optional)....................................................................................

2-24

 

Procedure 1 Test Program Check ...................................................................

2-24

 

Procedure 2

Connector Check ........................................................................

2-24

2.14

Cooling Module....................................................................................................

2-25

 

Procedure 1 Test Program Check ...................................................................

2-25

 

Procedure 2 Connector Check and Replacement Check.................................

2-25

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Chapter 3

Diagnostic Programs

 

3.1

General

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

3-1

3.2

Quick Start..............................................................................................................

3-3

3.3

Option...................................................................................................................

 

3-16

3.4

Subtests.................................................................................................................

 

3-27

3.5

System Test ..........................................................................................................

3-31

3.6

Memory ........................................................................................................Test

3-36

3.7

Storage..................................................................................................................

 

3-41

3.8

Video ....................................................................................................................

 

3-45

3.9

Communication ....................................................................................(COMM)

3-54

3.10Peripheral………………………………………………………………………..3-58

3.11

Error Codes and description................................................................................

3-59

3.12Quick Test Item List……………………………………………………………..3-i

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

Chapter 4

Replacement Procedures

 

4.1

General

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

4-1

4.2

Wireless ..............................................................................................LAN Card

4-22

4.3

HDD .....................................................................................................................

 

4-24

4.4

Cooling ....................................................................................................Module

4-27

4.5

CPU ......................................................................................................................

 

4-30

4.6

Speaker ...............................................................................Cover and Keyboard

4-33

4.7

Bluetooth .....................................................................................................Card

4-35

4.8

ODD Bay ................................................................................................Module

4-37

4.9

Display .................................................................................................Assembly

4-40

4.10

Top Cover.............................................................................................................

4-42

4.11

System ........................Board, Speaker and MIC, AC-IN, RJ11/45, MDC cable

4-45

4.12

VGA Board...........................................................................................................

4-48

4.13

North Bridge ...............................................................................thermal module

4-50

4.14

Display ........................................................................................................Mask

4-52

4.15

FL Inverter .................................................................................................Board

4-54

4.16

LCD Modules.......................................................................................................

4-56

4.17

I/O Board..............................................................................................................

4-59

4.18

Switch Cover ..........................................................................and Switch Board

4-60

4.19

Touch Pad ...............................................................................and Button Board

4-62

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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Appendices

 

 

Appendix A

Handling the LCD Module ...........................................................................

A-1

Appendix B

Board Layout .................................................................................................

B-1

Appendix C

Keyboard Scan/Character Codes ...................................................................

C-1

Appendix D

Key Layout....................................................................................................

D-1

Appendix E

Wiring Diagrams............................................................................................

E-1

Appendix F

BIOS Rewrite Procedures..............................................................................

F-1

Appendix G

EC/KBC Rewrite Procedures........................................................................

G-1

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

Chapter 1

Hardware Overview

1 Hardware Overview

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1 Hardware Overview

Chapter 1

Contents

 

1.1

Features ...............................................................................................................................

 

1

1.2

System Unit Components .................................................................................................

12

1.3

2.5-inch HDD....................................................................................................................

 

19

1.4 DVD-ROM Drive .............................................................................................................

20

1.5 CD-RW/DVD-ROM Drive...............................................................................................

21

1.6

DVD Dual (Double Layer) ...............................................................................................

22

1.7

DVD Super Multi..............................................................................................................

23

1.8

DVD Super Multi (Double Layer)....................................................................................

24

1.9

Power Supply ....................................................................................................................

 

25

2.0

Batteries ............................................................................................................................

 

26

 

1.1.1

Main Battery..........................................................................................

26

 

1.1.2

Battery Charging Control ......................................................................

26

 

1.1.3

RTC Battery ..........................................................................................

27

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1 Hardware Overview

Figures

 

 

Figure 1- 1

id_10_10g Parts description placement ................................................................

7

Figure 1- 2

id_10c_10gc Parts description placement ............................................................

8

Figure 1- 3

id_JP Parts description placement ........................................................................

9

Figure 1- 4 The computer Block diagram ..............................................................................

10

Figure 1- 5

System Board configuration ...............................................................................

11

Figure 1- 6

System unit block diagram ..................................................................................

12

Figure 1- 7 2.5-inch HDD ......................................................................................................

19

Figure 1- 8 DVD-ROM drive .................................................................................................

20

Tables

 

Table 1- 1 2.5-inch HDD specifications................................................................................

19

Table 1- 2 DVD-ROM drive specifications ..........................................................................

20

Table 1- 3 CD-RW/DVD-ROM drive specifications............................................................

21

Table 1- 4 DVD-Dual(Double Layer) drive specifications..................................................

22

Table 1- 5 DVD Super Multi drive specifications.................................................................

23

Table 1- 6 DVD Super Multi drive (Double Layer) specifications.......................................

24

Table 1- 7 Battery specifications...........................................................................................

26

Table 1-8 Quick/normal charging time .................................................................................

27

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.1 Features

1 Hardware Overview

1.1 Features

The Toshiba Satellite M40/M45 TECRA A4 dynabook VX/4 is a full size notebook PC based on the Intel Pentinm M (Dothan) and Celeron M processor, providing high-speed processing capabilities and advanced features. The computer employs a Lithium Ion battery that allows it to be battery-operated for a longer period of time. The display uses 15.4-inch WXGA and WSXGA+ LCD panel, at a resolution of 1280 by 800 pixels (WXGA) and 1680 by 1050 pixels(WSXGA+), The PGA socket supports BTO/CTO for the CPU so that the system can be designed to suit your needs.

The computer has the following features.

Processor

The CPU is the Intel Pentium M (Dothan) Processor and Intel Celeron M.

Intel Dothan Processor (533MHz)

730(1.6G)/740(1.73G)/750(1.86G)/760(2.0G)/770(2.13G) Hz

Intel Celeron M Processor (400MHz)

350(1.3G)/360(1.4G)/370(1.5G) Hz.

Japan Model Use:

Intel Dothan Processor (533MHz)

730(1.6G)

Intel Celeron M Processor (400MHz)

350(1.3G)

Host bridge system controller System controller: Intel 915 GM/PM Japan Model Use : Intel 915 GM

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1 Hardware Overview

1.1 Features

Memory

The computer has two SO DIMMs slot comes standard with DDR 2700 module. It supports PC2700 and uses SO DIMMs (DDR SDRAM) driven at 2.5 V, accepting BTO/CTO for your memory requirements. It can incorporate up to 2 GB of main memory.

using the following sizes of memory modules:

y128 MB (8M×16×8P)

y256 MB (16M×16×8P)

y512 MB (32M×16×8P)

y1024 MB (64Mx16x8P)

Japan Model Use : 256 MB (16M×16×8P)

512MB (32M×16×8P)

Hard Disk Drive (HDD)

The computer accommodates one 2.5-inch HDD with any of the following storage capacities:

y30 GB (9.5 mm thick) ATA (4,200rpm)

y40 GB (9.5 mm thick) ATA (4,200rpm)

y60 GB (9.5 mm thick) ATA (4,200rpm)

y80 GB (9.5 mm thick) ATA (4,200rpm)

y100 GB (9.5 mm thick) ATA (4,200rpm)

y120 GB (9.5 mm thick) ATA (4,200rpm)

y40 GB (9.5 mm thick) ATA (5,400rpm)

y60 GB (9.5 mm thick) ATA (5,400rpm)

y80 GB (9.5 mm thick) ATA (5,400rpm)

y100 GB (9.5 mm thick) ATA (5,400rpm)

y120 GB (9.5 mm thick) ATA (5,400rpm)

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.1 Features

1 Hardware Overview

ODD

The ODD can accommodate a CD-ROM, DVD-ROM, CD-RW/DVD ROM, DVD+-R/+-RW,DVD Super Multi ,DVD Super Multi (Double Layer)drives.

Display

The LCD displays available come in the following four sizes:

y 15.4” WXGA-Non CSV/15.4” WXGA-CSV/15.4” WXGA-CSV(High brightness)/15.4” WSXGA+-Non CSV color display, resolution 1280×800/1680×1050,262,144 colors with dithering.

Japan Model Use : 15.4”WXGA-CSV(High brightness)

Keyboard

The keyboard has 29 kinds countries key.

Batteries

The computer has a removable 6 Cell or 12 Cell Lithium Ion battery pack and an internal RTC battery (rechargeable).

Universal Serial Bus (USB) ports

The computer has three USB 1.1/2.0 ports, It is supported to daisy-chain a maximum of 127 USB devices. The serial data transfer rate is 480 Mbps or 12 Mbps and 1.5 Mbps These ports support PnP installation and hot plugging.

External monitor port

A 15-pin external monitor port is provided, through which the computer automatically recognizes an external VESA DDC 2B compatible monitor.

PC Card slot

A PC Card slot is provided to hold PC Card Standard Type II (5.0 mm) card, capable of using a variety of PC Cards including 16-bit Multiple Function PC Cards and 32-bit CardBus cards.

PC card HDD boot does Not be supported.

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1 Hardware Overview

1.1 Features

SD/MS(MS Pro)/SM//MMC/XD Card

This slot is for your memory card requirements to provide memory card read on your computer

Toshiba Pointing Device

Toshiba Pointing Device has one kind of Synaptice TouchPad with two button.

Sound system

The AD1981B integrated audio controller supports multimedia. The sound system contains the following:

yStereo speakers

yHeadphone jack

yInternal microphone

yExternal microphone jack

LAN

The internal LAN board supports 10/100 Mbit and Giga-bit for BTO, enabling connection to a LAN at up to 1Gbps. It also supports Wake-up On LAN From S3/S4/S5 and PXE boot support. The LAN board has the RJ45 jack to directly accommodate a LAN cable.

Wireless LAN

The internal Mini PCI Card slot supports IEEE802.11a/g(11ch)/ IEEE802.11g(11ch)/ IEEE802.11a/g(13ch)/ IEEE802.11g(13ch)/IEEE802.11a/g(14ch)/ IEEE802.11g(14ch) card. The Antenna has three wires dual band antenna support with Blue tooth for BTO.

Internal Modem

The computer contains a MDC, enabling data and fax communication. It supports ITU- T V.90 (for rest countries )/V.92(America, Canada,UK,Germany,France) The transfer rates are 56 Kbps for data reception, 33.6 Kbps for data transmission, and 14,400 bps for fax transmission. Note, however, that the actual speed depends on the line quality. The RJ11 modem jack is used to accommodate a telephone line.

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.1 Features

1 Hardware Overview

IEEE 1394

The IEEE 1394 serial data transfer rate is 400 Mbps, These port support hot plugging.

Parallel Port(optional)

The Parallel Port is optional integrated device. to supported connect a printer or another parallel device. The port is IEEE-1284 compliant and supports Extended Capabilities Port (ECP).

CD Key(optional)

The CD Key supports to play Audio CD directly.

PCI Express Slot

The ICH6 provides PCI Express root ports which are compliant to the PCI Express Base Specification ,Revision 1.0a.The Root Port supports 2.5Gb/s bandwidth in each direction (5 Gb/s concurrent) and two virtual channels for full isochronous data support.

Fast Serial Infrared (FIR) communications port(optional)

The FIR Port is optional integrated device. It provided an IrDA 1.1 compatible FIR port , enabling wireless communication at a high speed of 1.15 or 4 Mbps.

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1 Hardware Overview

1.1 Features

Figures 1-1/1-2 and 1-3 show the computer and its system unit configuration, respectively.

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.1 Features

1 Hardware Overview

Figure 1- 1 id_10_10g Parts description placement

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

7

1 Hardware Overview

1.1 Features

Figure 1- 2 id_10c_10gc Parts description placement

8

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.1 Features

1 Hardware Overview

Figure 1- 3 id_JP Parts description placement

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

9

1.1 Features

1 Hardware Overview

Figure 1- 4 The computer Block diagram

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

10

1.1 Features

1 Hardware Overview

Figure 1- 5 System Board configuration

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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Toshiba satellite m40, tecra a4, dynabook vx4 Service Manual

1.2 System Unit Components

1 Hardware Overview

1.2 System Unit Components

Figure 1-6 is a block diagram of the system unit.

Figure 1- 6 System unit block diagram

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1.2 System Unit Components

1 Hardware Overview

The system unit of the computer consists of the following components:

Processor: Intel Pentium M (Dothan) Processor and Celeron M

yIntel Dothan Processor (533MHz)

Core speed: 1.6/1.73/1.86/2.0/2.13 GHz

System bus: 533 MHz

On-die level 2 cache 2 MB

Advanced Power Management features including Enhanced Intel ® SpeedStep ® technology

yCeleron-M (400MHz)

Core speed: 1.3/1.4/1.5 GHz

System bus: 400 MHz

On-die level 2 cache 1 MB

Memory

Two expansion memory slots were provided, They can hold 128/256/512/1024MB expansion memory modules available as options to grow up to 2.0 GB.

yPC2700/333MHz DDR SDRAM supported

y128/256/512/1024MB modules supported

128 MB (16M x 16 x 4P)

256 MB (16M x 16 x 8P)

512 MB (32M x 16 x 8P)

1024 MB (64M x 8 x 16P)

y2.5 volt operation

yNo parity bit

y64-bit data transfer

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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1 Hardware Overview

1.2 System Unit Components

BIOS ROM (flash EEPROM)

y4Mb x 1 chip (512KB flash parts)

33kb used for EC BIOS

51kb used for VGA BIOS

40kb used for pxe boot

4kb used for logo

7kb used for USB

15kb used for SCU

14kb used for PCI

2kb used for ACPI

14kb used for PNP

30kb used for PM

50kb used for system BIOS

8kb used for micro code

2kb used for DMI

4kb used for password

26kb used for boot load

1kb used for IMAG002

2kb used for DYNALOGO

2kb used for TSBDEV

4kb used for OSB_CMT

4kb used for OSB_PMP

11kb used for DISPSEG

4kb used for OWNER_ROM

40kb used for GIGA

8kb used for TSBOEM

1kb used for CBboot

156kb reserved

System controllers

yNorth Bridge: Intel 915 GM

CPU interface and control

System Memory Support

PCI Express* Graphics (PEG) Interface

Integrated Display Interface Support

Internal Graphics Features

Direct Media Interface (DMI)

Power Management

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Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

1.2 System Unit Components

1 Hardware Overview

yNorth Bridge: Intel 915 PM

CPU interface and control

System Memory Support

PCI Express* Graphics (PEG) Interface

Direct Media Interface (DMI)

Power Management

ySouth Bridge: ICH6-M

Direct Media Interface (DMI)

PCI Express* Interface

Serial ATA (SATA) Controller

Advanced Host Controller Interface (AHCI)

PCI Interface

IDE Interface

Low Pin Count (LPC) Interface

Compatibility Modules

Advanced Programmable Interrupt Controller (APIC)

Universal Serial Bus (USB) Controller

Lan Controller

Alert Standard Format (ASF) Management Controller

RTC

GPIO

Enhanced Power Management

Manageability

System Management Bus (SMBus 2.0)

Intel High Definition Audio Controller

AC ’97 2.3 Controller

PC Card controller

yTI PCI7411

CardBus/PC Card controller

16-bit PCMCIA and 32-bit CardBus.

SD/MS/MS Pro/MMC/SM/XD Card controller

IEEE 1394 Controller

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1 Hardware Overview

1.2 System Unit Components

Audio Controller

The AD1981B integrated audio controller supports multimedia. The sound system feature contains the following:

yVariable Sample Rate Audio

yExternal Audio Power –Down Control

yIntegrated Stereo Headphone Amplifier

yStereo Full-Duplex Codec

y20-Bit PCM DAC

yDual MIC Input with Built-In Programmable Preamp

yHigh Quality CD Input with Ground Sense.

KBC/EC (Keyboard Controller/Embedded Controller)

A single LPC 47N249 chip is used to serve as KBC/ EC and Super IO.

yKBC

Scan controller function

Interface controller function

yEC

Power supply sequence control

Overheat shutdown support

LED control

Beep control

Device ON/OFF

Cooling fan speed control

Universal I/O port

Battery capacity check

Flash memory reprogramming function

EC access interface

I2C communication control

Battery EE PROM

y24C02 equivalent (128 words x 16 bits, I2C interface) integrated in the battery pack

Storing records of battery use

16

Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual

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