Toshiba P25 Personal Computer User manual

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Toshiba Personal Computer

Satellite P20-25 Series

Maintenance Manual

TOSHIBA CORPORATION

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 P20-25 Series Maintenance Manual

First edition June 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 P20 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. ii Satellite P20-25 Series Maintenance Manual

Preface

This maintenance manual describes how to perform hardware service maintenance for the

Toshiba Personal Computer Satellite P20 Series, referred to as the P20-25 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.

Satellite P20-25 Series Maintenance Manual iii

The manual is divided into the following parts:

Chapter 1 Hardware Overview describes the P20-25 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 iv Satellite P20-25 Series 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 computer that appears on its display is presented in the type face below:

Format complete

System transferred

Satellite P20-25 Series Maintenance Manual v

vi Satellite P20-25 Series Maintenance Manual

Table of Contents

Chapter 1 Hardware Overview

1.1 Features ...................................................................................................................... 1-1

1.3 2.5-inch Hard Disk Drive........................................................................................... 1-9

1.6 Batteries ................................................................................................................... 1-13

Chapter 2 Troubleshooting Procedures

2.3 Power Supply Troubleshooting.................................................................................. 2-7

2.7 External USB Devices Troubleshooting.................................................................. 2-20

2.8 TV-Out Failure Troubleshooting ............................................................................. 2-22

2.9 Printer Port Troubleshooting ................................................................................... 2-24

2.12 Optical Drive Troubleshooting ................................................................................ 2-30

2.15 IEEE 1394 Troubleshooting .................................................................................... 2-37

2.16 Wireless LAN Troubleshooting............................................................................... 2-39

Satellite P20-25 Series Maintenance Manual vii

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

3.13 Mouse (Pad) Test ..................................................................................................... 3-18

3.14 LCD Pixels Mode Test............................................................................................. 3-20

3.15 Lid Switch Test ........................................................................................................ 3-21

3.16 HDD R/W Test ........................................................................................................ 3-22

3.19 CD Control Button Test ........................................................................................... 3-27 viii Satellite P20-25 Series Maintenance Manual

Chapter 4 Replacement Procedures

4.1 General.......................................................................................................................... 1

4.2 Battery........................................................................................................................... 7

4.9 Wireless LAN Unit ..................................................................................................... 25

4.11 Modem / Bluetooth Unit ............................................................................................. 31

4.12 CPU............................................................................................................................. 34

4.13 HDD............................................................................................................................ 38

4.14 Keyboard..................................................................................................................... 42

4.16 Function Key Board.................................................................................................... 48

4.17 LED / Power Button Board......................................................................................... 50

4.18 TouchPad .................................................................................................................... 52

4.21 Direct Play Button Board............................................................................................ 62

4.23 Direct play LED board................................................................................................ 66

4.25 Speakers ...................................................................................................................... 70

4.28 FL Inverter Board ....................................................................................................... 77

Satellite P20-25 Series Maintenance Manual ix

Appendices

Appendix A Handling the LCD Module ........................................................................... A-1

Appendix B Board Layout ................................................................................................ B-1

Appendix C Pin Assignments............................................................................................ C-1

Appendix D Keyboard Scan/Character Codes .................................................................. D-1

Appendix E Key Layout.....................................................................................................E-1

Appendix F Series Screw Torque List ...............................................................................F-1

Appendix G Reliability...................................................................................................... G-1 x Satellite P20-25 Series Maintenance Manual

Chapter 1

Hardware Overview

1 Hardware Overview

1-ii Satellite P20-25 Series Maintenance Manual

1 Hardware Overview

Chapter 1 Contents

1.1 Features......................................................................................................................... 1

1.3 2.5-inch Hard Disk Drive.............................................................................................. 8

1.4.1 3.5-inch Floppy Disk Drive.............................................................................9

1.6 Batteries ...................................................................................................................... 16

Satellite P20-25 Series Maintenance Manual 1-iii

1 Hardware Overview

1-iv Satellite P20-25 Series Maintenance Manual

1.1 Features 1 Hardware Overview

1.1 Features

The Satellite P20-25 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 Desktop P4 up to 2.4GHZ or Northwood upgradable

Chipset

• Intel DT Springdale (865 PE)

• Intel 82801 EB I/O Controller HUB5(ICH5)

• PC87591L for Keyboard Controller, Battery Management Unit and RTC

• T7L58XB for CardBus and SD Controller

• nVIDIA NV34M Graphics Controller

• Cirrus logic ALC202 for AC97 CODEC

• OZ168 for Direct CD Play Controller

• 8101L for LAN Controller

Memory

• On board with two 200-pin +2.5V SO-DIMM connectors, supporting DDR

RAM cards. Maximum upgradable to 1GB by two 512MB SO-DIMM modules

• 256 KB/512KB L2 Cache on CPU

• External 64MB VGA DDR RAM

BIOS

• 512KB Flash ROM for system BIOS.

• Suspend to RAM/Disk.

• Password protection (System).

• Windows XP ready with PnP

• Various hot key for system control.

• Refreshable

• Complete ACPI 1.0B Function

Power

• 12 cells Li-Ion 18650 size smart battery Pack with 95Wh capacity

• 2.

0 hours operation as running battery mark 2001 version 1.0/+ program

• 12 hours charging time to 100% capacity on Li-Ion Battery (System on)

• Brightness Minimum plus 3 steps

• RTC battery (Sanyo ML1220T128 3.3V/15mAH Lithium) backs up the Real

Time Clock and CMOS memory

Satellite P20-25 Series Maintenance Manual 1-1

1 Hardware Overview 1.1 Features

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

FDD / DVD Devices

One of the following:

• 12.7mm, 1.44MB FDD device

• 5.25” 12.7mm height DVD-R/RW device

• 5.25” 12.7mm height DVD-ROM device

• 5.25” 12.7mm height DVD multi-drivedevice

• 5.25” 12.7mm height combo device

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 102key enhanced keyboard. Includes one Windows ® key and one Application key.

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

The following types of display are available:

• 17.0-inch WXGA TFT screen, 1440 × 900 pixels, Response time 31ms (typ.);

Contrast ratio 350:1 (typ.); Brightness 150 Nit (typ.)

• 17.1-inch WXGA TFT screen, 1440 × 900 pixels, Response time 31ms (typ.);

Contrast ratio 300:1 (typ.); Brightness 160 Nit (typ.)

Optional devices

• 64MB/128MB/256MB/512MB SO-DIMM modules

• MINI PCI module(802.11b wireless LAN module)

• Modem with MDC solution module

1-2 Satellite P20-25 Series Maintenance Manual

1.1 Features 1 Hardware Overview

I/O Ports

• One 25-pin parallel port, EPP/ECP capability

• One 15-pin CRT port, supports DDC 2B

• One TV-out connector

• One MIC-in port

• One line-in port

• One headphone-out

• One 2-pin AC adapter jack

• One type III or two type II PCMCIA card bus slots

• Four 4-pin USB ports

• One RJ11/RJ45 port

• VR for volume control

• IEEE1396 (i.Link / FireWire) port

• CIR port

Universal Serial Bus (USB)

The computer comes with four USB ports that comply with Universal Host Controller

Interface (UHCI). The USB enables daisy-chain connection of up to 127 USBequipped 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.

PC Card Slot

The PC Card Slot accommodates two 5mm cards (Type II) or one 10.5mm (Type III) card and supports SRAM, OTPROM, FLASH ROM, and mask ROM memory cards up to 64MB as well as MODEM/LAN cards, ATA cards and Card bus cards. ACPI

1.0b compliant.

Satellite P20-25 Series Maintenance Manual 1-3

1 Hardware Overview 1.1 Features

Sound system

A Cirrus logic ALC202 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.

CD/Digital Mode Button and audio/video control buttons

Unlock the control buttons by pressing the CD/Digital Mode Button for three seconds.

When unlocked, the CD or Digital LED will light on the front panel. When unlocked, press the CD/Digital Mode Button briefly to switch between CD mode and digital mode. CDs can be played with the computer turned off. Pressing play in digital mode will start the computer and launch the digital music player application.

1-4 Satellite P20-25 Series Maintenance Manual

1.2 System Unit 1 Hardware Overview

The system unit is composed of the following major components:

Processor

• Intel Desktop P4 up to 2.4GHZ or Northwood upgradable

– mPGA478 package CPU

– FSB533 Northwood CPU 2.53G/2.66G/2.8G w/o HT

– FSB533 Northwood CPU 3.06G w/HT

– FSB800 Northwood CPU 2.4G/2.6G/2.8G/3.0G/3.2G w/HT

System Logic

• Intel chipset MCH Springdale PE

• Integrated DRAM controller

• Accelerated Graphics Port (AGP) Interface

• Hub Interface to Intel ICH5

• Power Management Functions

Fixed Disk Interface

• Intel 82801 EB I/O Controller HUB5 (ICH5)

KBC/EC (Keyboard Controller/Embedded Controller)

• One PC87591 chip functions as both KBC and EC.

• KBC 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

• EC has the following functions:

– Power supply sequence control control control

– Devices ON/OFF control

– FAN revolutions rate control

– General Input/Output port control

– Docker power supply control

– Battery capacity check rewriting

– Detection of abnormal condition

Communication access

Satellite P20-25 Series Maintenance Manual 1-5

1 Hardware Overview 1.2 System Unit

Memory

• System DRAM

• Two JEDEC standard 200-pins SO-DIMM memory support +2.5V

64/128/256MB/512MB.

• System & KB Combine ROM BIOS

• 512KB Flash ROM

Video Subsystem

• nVIDIA NV34M Graphics Controller)

• Microsoft-DX9 & OpenGL-2.0 (with NVIDIA extensions) Graphics APIs hardware support

• 50 million triangles per second setup engine

• 1000 million pixels per second fill rate

• 256-bit 3D and 2D graphics accelerator, with full 32/64/128-bit color with 32- bit z/stencil (24+8 bit) support

• Complete pipeline support for 128-bit color for ultimate rendering quality

• NVIDIA Accuview+ anti-aliasing technology for full Quincunx AA capability –even for high-resolution UXGA panels

• Raw Peak memory bandwidth of 8.0 GB/second

• Supports 128-bit DDR SDRAM, driven by a twin memory channel architecture, for maximizing memory bandwidth utilization to enhance rendering performance while minimizing power-consumption as well.

• DirectX and S3TC texture compression support

• AGP8x (with Fast Writes & Side-band-Signaling support) - for enhanced host interface bandwidth up-to 2.1Gbytes/second; with AGP4x, 2x support as well

• Enhanced nView+ multi-display technology supporting any combination of notebook LCD, desktop VGA monitor, DVI display or TV set; with new user

& applications control & interface support capabilities

• Dual CRTC/Simultaneous Dual Display (same or different surfaces)

• Integrated dual LVDS Transmitter supporting LCD panels up to 2048x1536

@60Hz

• Integrated 400 MHz Palette-DAC for analog VGA monitors up to 2048x1536

@85Hz refresh

• Integrated NTSC/PAL TV encoder supporting resolutions up to 1024x768 without the need for panning, with built-in Macrovision(7.1.L1) copyprotection

• Integrated TMDS transmitter for Digital Visual Interface support with scaling and filtering for flat panels up to 1600x1200 @60Hz

• DVD- and HDTV-ready MPEG-2 decoding up to 1920x1080i resolutions

• Most comprehensive MPEG-2 hardware decode functionality, including

Inverse Quantization,

Inverse Discrete Cosine Transform, Motion Compensation and Color-Space-

Conversion

• VIP1.1 interface support for Analog Video In/Out functionality

1-6 Satellite P20-25 Series Maintenance Manual

1.2 System Unit 1 Hardware Overview

• Dual 12-bit or Single 24-bit configurable DVO ports for up-to 333Mpixels/sec transfer rates

• Improved visual quality for all display planes (desktop or overlay) over all display devices (LCD, CRT, TV) – enabled by improved filtering, adaptive de- interlacing & per-pixel gamma-correction hardware circuitry

• Full support for all Windows (ME, 2K, XP), MAC OSX & Linux operating systems

• PowerMizer3.0 technology for further maximizing battery life, while minimizing performance compromises - through dynamic intelligent powering down of currently unused functional blocks

• Advanced TSMC 0.15 micron with 8-layer metals process, for maximizing performance while minimizing power – a critical mobile combination

• 31x31mm, 701 EPBGA package

Audio subsystem

• Cirrus logic ALC202 for AC97 codec

– Ac 97 2.1 Compatible

– 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 Pseudo-Differential CD Input

– Extensive Power Management Support

– Meets or Exceeds the Microsoft® PC 99 Audio Performance

Requirements

– S/PDIF Digital Audio Output

– CrystalClear ® 3D Stereo Enhancement

Super I/O

• One LPC47N227 chip is used.

• This gate array has the following features:

− Floppy Disk Controller

− Parallel Port Controller

Satellite P20-25 Series Maintenance Manual 1-7

1 Hardware Overview 1.4 Removable Drives

1.3 2.5-inch Hard Disk Drive

The internal HDD is a random access non-volatile storage device. It has a non-removable

2.5-inch magnetic disk and mini-Winchester type magnetic heads. The computer supports a

30 / 40 / 60 / 80GB HDD.

1-8 Satellite P20-25 Series Maintenance Manual

1.4 Removable Drives 1 Hardware Overview

The module compartments can accommodate the following removable modules:

• Battery pack

• Secondary hard disk drive

• TV tuner

• Floppy disk drive

• DVD-R/-RW drive

• DVD-ROM drive

• DVD multi-drive drive

• Combo drive

1.4.1 3.5-inch Floppy Disk Drive

The 3.5-inch FDD is a thin, high-performance reliable drive that supports 720KB (formatted)

2DD and 1.44MB (formatted) 2HD disks. The specifications for the FDD are listed in the table below.

Item 2MB mode 1MB mode

Storage capacity (KB)

Unformatted

Formatted

Number of heads

2,000

1,440

2

1,000

720

2

Number of cylinders

Recording method

80 80

Modified Frequency Modulation (MFM)

Satellite P20-25 Series Maintenance Manual 1-9

1 Hardware Overview 1.4 Removable Drives

1.4.2 DVD-R/-RW Drive

The DVD-R/-RW drive (Toshiba SD-R6112) accommodates either 12cm (4.72-inch) or 8cm

(3.15-inch) CDs or DVDs.

Read speeds

DVD-ROM

DVD-RAM

CD-ROM

Write speeds

CD-R

Maximum 8 times faster rotational speed

Standard rotational speed

Maximum 24 times faster rotational speed

4,16 times faster rotational speed

CD-RW 4 times faster rotational speed

High-Speed CD-RW 4,10 times faster rotational speed

DVD-R

DVD-RW disc

1, 2 times rotational speed

1 times rotational speed

Access Speed

Average Random Access Time DVD-ROM: 115 ms (3.3-8X)

CD-ROM: 105 (10.3-24X)

DVD-RAM: 170 ms (4.7GB 1X)

Average Random Seek Time DVD-ROM: 105 ms (3.3-8X)

CD-ROM: 100 (10.3-24X)

DVD-RAM: 120 ms (4.7GB 1X)

Average Full Stroke Access Time DVD-ROM: 195 ms (3.3-8X)

CD-ROM: 180

DVD-RAM: 350 ms (4.7GB 1X)

Buffer capacity

Supported formats

Applicable CD CD-R/RW

Write Formats: DVD

DVD-R

DVD-RW

Applicable

Write Disc:

CD CD-R/RW [CD-DA, CD+(E)G, CD-MIDI, CD-ROM, CD-ROM XA,

DVD-RW

DVD-R

MIXED MODE CD, CD-I, CD-I Bridge (Photo-CD, Video-CD),

Multisession CD (Photo-CD, CD-EXTRA, Portfolio)]

DVD

Applicable

Read Disc:

CD CD-DA, CD+(E)G, CD-MIDI, CD-TEXT, CD-ROM, CD-ROM XA, CD-I, CD-I

Bridge (Photo-CD, Video-CD) Multisession CD (Phto-CD, CD-EXTRA, CD-R,

CD-RW, Portfolio), CD-R, CD-RW

DVD

DVD-R

DVD-RW

DVD-RAM

1-10 Satellite P20-25 Series Maintenance Manual

1.4 Removable Drives 1 Hardware Overview

1.4.3 DVD-ROM Drive

The DVD-ROM drive (Toshiba SD-C2612 or Matsushita SR-8177) accommodates either

12cm (4.72-inch) or 8cm (3.15-inch) CDs or DVDs.

Transfer rates

Matsushita SR-8177: The DVD-ROM drive is able to read CD-ROM, CD-R data at 10.3X to

24X CAV mode speed and CD-RW data at 5.1X to 12X CAV mode speed. The drive has a transfer rate of max. 3 600 kbyte/s for CD-

ROM data, CD-R and max. 1 800 kbyte/s for CD-RW data. The drive is able to read DVD disc at CAV mode speed. The drive has a transfer rate of max. 11.08 Mbyte/s for DVD data.

Toshiba SD-C2612: Max.8X (DVD-ROM) / Max. 24X (CD-ROM)/2X (DVD-RAM

Ver.1.0)/1X (DVD-RAM Ver.2.1)

Max. 10,820 KByte/s (DVD-ROM)/Max. 3,600KByte/s (CD-ROM)

Sustained Transfer Rate

Buffer capacity

Matsushita SR-8177: 256 Kbytes (Max)

Toshiba SD-C2612 192 Kbytes (Max)

Supported formats

CD: CD-Audio CD-ROM (mode 1 and mode 2) CD-ROM XA (mode 2, form 1 and form 2)

CD-I Bridge CD-I (mode 2, form 1 and form 2) CD-TEXT

Video CD CD-RW Photo CD

CD-I Ready** CD-WO** Enhanced Music CD (CD Plus)**

CD+(E)G* CD-MIDI*

DVD: DVD-5 DVD-9

CD-R*

DVD-10

DVD-RW

* Toshiba SD-C2612 only

** Matsushita SR-8177only

Satellite P20-25 Series Maintenance Manual 1-11

1 Hardware Overview 1.4 Removable Drives

1.4.4 DVD Multi-Drive

The Matsushita UJ-811B DVD multi-drive is capable of driving either 12cm (4.72-inch) or

8cm (3.15-inch) DVDs and CDs without using an adaptor.

Read speed

DVD-ROM

CD-ROM

Max 8X CAV (MAX 10800 kB/s)

Max 24X CAV (MAX 3600 kB/s)

Write speed

CD-R : Max16X Zone CLV

4X

High Speed CD-RW 8XCLV

DVD-RW

DVD-RAM

1X

2X ZCLV ( 4.7GB)

Access Speed

DVD-ROM 180ms (Typ.) (Random)

150ms(Typ.)

ATAPI Interface

PIO mode

DMA mode

Ultra DMA mode

Buffer Memory

Supported formats

16.6 MB/s :PIO mode4

16.6 MB/s :Multi word mode2

33.3 MB/s :Ultra DMA mode2

2MB

CD: CD-DA CD-ROM

CD-R CD-ROMXA

CD-R/W

Ready

CD Cd-Extra(CD+)

CD-TEXT

DVD: DVD-Video DVD-ROM DVD-R(3.9GB, 4.7GB)

1-12 Satellite P20-25 Series Maintenance Manual

1.4 Removable Drives 1 Hardware Overview

1.4.5 Combo Drive

The CD-RW/DVD-ROM combo drive (Toshiba SD-R2412 or TEAC DW-224E-85) is capable of driving either 12cm (4.72-inch) or 8cm (3.15-inch) DVDs and CDs without using an adaptor.

Read speeds

DVD-ROM

DVD-RAM

CD-ROM

Write speeds

CD-R

Maximum 8 times faster rotational speed

Standard rotational speed

Maximum 24 times faster rotational speed

4,8,16,24 times faster rotational speed

CD-RW 4 times faster rotational speed

High-Speed CD-RW 4,10 times faster rotational speed

Access Speed

Average Random Access Time DVD: 100 ms typ (Toshiba SD-R2412)

110

CD: 90 ms typ (10.3-24X)

Average Random Seek Time DVD:

CD:

85 ms typ*

80 ms typ (10.3-24X)*

Average Full Stroke Access Time DVD: 170 ms typ*

CD: 160 ms typ (10.3-24X)* ms*

* Toshiba SD-R2412

Buffer capacity

Supported formats

Applicable

Write Formats:

CD CD-R

CD-RW

Applicable

Write Disc:

CD CD-R

CD-RW [CD-DA, CD+(E)G, CD-MIDI, CD-TEXT, CD-ROM, CD-ROM XA,

MIXED MODE CD, CD-I, CD-I Bridge (Photo-CD, Video-CD),

Applicable

Read Disc:

CD

Multisession CD (Photo-CD, CD-EXTRA, Portfolio)]

CD-DA, CD+(E)G, CD-MIDI, CD-TEXT, CD-ROM, CD-ROM XA, MIXED

MODE CD, CD-I, CD-I Bridge (Photo-CD, Video-CD), Multisession CD (Photo-

CD, CD-EXTRA, Portfolio, CD-R, CD-RW), CD-R, CD-RW

DVD

DVD-R

DVD-RW

DVD-RAM

Satellite P20-25 Series Maintenance Manual 1-13

1 Hardware Overview 1.5 Power Supply

The power supply supplies seven different voltages to the system board and performs the following functions:

1. A/D conversion

The EC uses 10-bit sampling for A/D conversion to determine the following values:

• AC adaptor current

• Battery and temperature

2. AC adaptor and battery check

The EC checks the following by A/D converted values:

• Battery installed

The EC checks the following by GPIO values:

• AC adaptor connected

3. Abnormal check

The EC determines whether the condition is abnormal, and if so, stores an error code into the error register.

4. Input port management

The EC monitors the following input signal status:

• System power ON/OFF status

• Direct CD power ON/OFF status

5. Beep and LED control

Beep is caused by the low battery status.

The EC controls the following two kinds of LED

DC IN LED (one color: green)

• Green = indicates AC adaptor is connected

Battery LED (two colors: orange and green)

• Green solid = The battery is fully charged.

1-14 Satellite P20-25 Series Maintenance Manual

1.5 Power Supply 1 Hardware Overview

• Orange = The computer is quick-charging the battery / The battery is low.

6. Power ON/OFF sequence

When power is turned on or off, the EC starts the power on or off sequence.

• SQ0-4 = power ON sequence

• SQ5-B = power OFF sequence

7. Battery charging control

The EC controls the following.

• The quick charging ON/OFF

• The detection of full charge

8. Detection of the low battery

The EC detects the low battery point by the gas gauge.

• LB10M = The system will be driven by the battery for 12 more minutes.

• LB0 = The battery won't be able to drive the system after 3 minutes.

• LB1 = The battery can drive the system only during the suspend process.

• LB2 = The battery cannot drive the system.

9. New battery installation

When a new battery is installed, the EC communicates with the E 2 battery to read information of the newly installed battery.

PROM in the

10. Battery capacity calculation

The EC reads battery remaining and percentage capacity from the battery through

SMBus.

Satellite P20-25 Series Maintenance Manual 1-15

1 Hardware Overview 1.6 Batteries

1.6 Batteries

The computer has two types of battery:

Main battery pack (18650 size)

RTC battery

The removable main battery pack is the computer’s main power source when the AC adaptor is not attached.

The battery specifications are listed in the table below.

Battery name

Main battery

RTC battery

1.6.1 Main Battery

Material

Lithium-Ion

Lithium

Output voltage

14.8 V

3.3 V

Capacity

6450mAH

15 mAh

Battery charging is controlled by a power supply microprocessor that is mounted on the system board. The power supply microprocessor controls whether the charge is on or off and detects a full charge when the AC adaptor and battery are attached to the computer. The system charges the battery using quick charge or trickle charge.

Quick Battery Charge

When the AC adaptor is attached, there are two types of quick charge: quick charge when the system is powered off and normal charge when the system is powered on.

The times required for charges are listed in the table below.

Normal charge (power on)

Quick charge (power off)

12 hours or longer

About 4 hours

1-16 Satellite P20-25 Series Maintenance Manual

1.6 Batteries 1 Hardware Overview

NOTES

1. The time required for normal charge is affected by the amount of power the system is consuming. Use of the fluorescent lamp and frequent disk access diverts power and lengthens the charge time.

2. Using quick charge, the power supply microprocessor automatically stops the charge after eight hours regardless of the condition of the battery. Overcharging could cause the battery to explode.

If any of the following occurs, the battery quick charge process stops.

1. The battery becomes fully charged.

2. The AC adaptor or battery is removed.

3. The battery or output voltage is abnormal.

4. The battery temperature is abnormal.

5. The battery SMBus communication fails.

6. The battery cell is bad.

Satellite P20-25 Series Maintenance Manual 1-17

1 Hardware Overview 1.6 Batteries

Detection of full charge

A full charge is detected from the battery pack through SMBus when the battery is charging.

1.6.2 RTC battery

The RTC battery provides power to keep the current date, time and other setup information in memory while the computer is turned off. The table below lists the charging time and data preservation period of the RTC battery. The RTC battery is charged by the adaptor or main battery, while the computer is powered on.

Status

Charging Time (power on)

Data preservation period (full charge)

Time

About 48 hours

2 month

1-18 Satellite P20-25 Series Maintenance Manual

1.6 Batteries 1 Hardware Overview

Satellite P20-25 Series Maintenance Manual 1-19

Chapter 2

Troubleshooting Procedures

2 Troubleshooting Procedures

2-ii Satellite P20-25 Series Maintenance Manual

2 Troubleshooting Procedures

Chapter 2 Contents

2.3 Power Supply Troubleshooting.................................................................................. 2-7

2.7 External USB Devices Troubleshooting.................................................................. 2-19

2.8 TV-Out Failure Troubleshooting ............................................................................. 2-21

2.12 Optical Drive Troubleshooting ................................................................................ 2-29

2.15 IEEE 1394 Troubleshooting .................................................................................... 2-36

2.16 Wireless LAN Troubleshooting............................................................................... 2-38

Satellite P20-25 Series Maintenance Manual 2-iii

2 Troubleshooting Procedures

Figures

Figure 2-1 Troubleshooting flowchart (1/2) ....................................................................2-3

Figure 2-1 Troubleshooting flowchart (2/2) ....................................................................2-4

Figure 2-2 Power Supply Troubleshooting Process.........................................................2-7

Figure 2-3 Display troubleshooting process ..................................................................2-12

Figure 2-4 FDD troubleshooting process.......................................................................2-15

Figure 2-5 Keyboard troubleshooting process ...............................................................2-17

Figure 2-6 External USB device troubleshooting process .............................................2-19

Figure 2-7 TV-out troubleshooting process ...................................................................2-21

Figure 2-8 Printer port troubleshooting process.............................................................2-23

Figure 2-9 TouchPad troubleshooting process...............................................................2-25

Figure 2-10 Speaker troubleshooting process ..................................................................2-27

Figure 2-11 Optical drive troubleshooting process..........................................................2-30

Figure 2-12 Modem troubleshooting process ..................................................................2-33

Figure 2-13 PCMCIA troubleshooting process................................................................2-35

Figure 2-14 IEEE 1394 troubleshooting process .............................................................2-37

Tables

Table 2-1 Battery LED ...................................................................................................2-8

Table 2-2 DC-IN LED ....................................................................................................2-9

2-iv Satellite P20-25 Series Maintenance Manual

2.1 Troubleshooting Introduction 2 Troubleshooting Procedures

Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the computer is causing the computer to malfunction. The FRUs covered are:

1. Display

2. Floppy Disk Drive

6. Printer (parallel) port

7. TouchPad

11. PCMCIA unit

12. IEEE 1394 port

3. Keyboard

4. USB ports

5. TV-out port

8. Speaker

9. Optical drive

10. Modem

13. Wireless LAN system

14. Bluetooth

The Diagnostics Disk operations are described in Chapter 3. Detailed replacement procedures are given in Chapter 4.

The following tools are necessary for implementing the troubleshooting procedures:

1. Diagnostics Disk (Repair and Sound Repair)

2. Phillips screwdriver (2 mm)

3. 6mm nut driver (for the helix screw nuts on the rear ports for CPU door)

4. 2DD or 2HD formatted work disk for floppy disk drive testing

5. Printer port loopback connector

6. Sycard (PCMCIA test card)

7. Cleaning kit for floppy disk drive troubleshooting

8. Cleaning kit for optical drive troubleshooting

9. Multimeter

10. External monitor

11. USB compatible keyboard

12. Multimedia sound system with line-in and line-out ports

13. Headphones

14. USB test module and USB cable

15. Music CD

Satellite P20-25 Series Maintenance Manual 2-1

2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart

If you know the location of the malfunction, turn directly to the appropriate section of this chapter. If the problem is unspecified, use the flowchart in Figure 2-1 as a guide for determining which troubleshooting procedures to execute. Before performing any troubleshooting procedures, verify the following:

Ask the user if a password is registered and, if it is, ask him or her to enter the password.

Verify with the customer that Toshiba Windows XP is installed on the hard disk. Operating systems that were not preinstalled by Toshiba can cause the computer to malfunction.

Make sure all optional equipment is removed from the computer.

Make sure the floppy disk drive if installed is empty. If no FDD module is installed, you should use an external FDD to run the diagnostics tests

2-2 Satellite P20-25 Series Maintenance Manual

2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures

S T A R T

C o n n ect th e A C ad ap ter to th e D C -IN so ck et

Is th e D C -IN L E D o n ?

Y es

Is th e B attery L E D o n ?

Y es

T u rn th e P o w er sw itch o n

Y es

Is th e P o w er O n L E D o n ?

Y es

Is th e "T o sh ib a" lo g o m essag e d isp lay?

Y es

If th e "p assw o rd " m essag e d isp lays, typ e th e p assw o rd , th en p ress E n ter.

N o

N o

N o

N o

P erfo rm th e P o w er S u p p ly

T ro u b lesh o o tin g p ro ced u res in sectio n 2 .3

P erfo rm th e P o w er S u p p ly

T ro u b lesh o o tin g p ro ced u res in sectio n 2 .3

P erfo rm th e P o w er S u p p ly

T ro u b lesh o o tin g p ro ced u res in sectio n 2 .3

P erfo rm th e D isp lay

T ro u b lesh o o tin g p ro ced u res in sectio n 2 .4

Is T o sh ib a W in d o w s b ein g lo ad ed ?

Y es

A

N o

P erfo rm d iag n o stics p ro g ram .

R u n C M 1 6 5 .E X E an d select th e

H A R D D IS K item .

Figure 2-1 Troubleshooting flowchart (1/2)

Satellite P20-25 Series Maintenance Manual 2-3

2 Troubleshooting Procedures

A

2.2 Troubleshooting Flowchart

Does typed characters appear correctly?

Yes

Insert the diagnostics disk into the FDD.

Then run the diagnostics test program.

Yes

Is the diagnostics test loaded?

Yes

Allow each test to perform automatically

No

Perform the Keyboard

Troubleshooting procedures in section 2.6

No

Perform the FDD

Troubleshooting procedures in section 2.5

Is an error detected by any of the diagnostics tests?

No

System is normal

Yes

After confirming which diagnostics test has detected an error, perform the appropriate procedure as outlined below.

End

Figure 2-1 Troubleshooting flowchart (2/2)

2-4 Satellite P20-25 Series Maintenance Manual

2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures

If the diagnostics program cannot detect an error, the problem may be intermittent. The test program should be executed several times to isolate the problem. When a problem has been located, perform the appropriate troubleshooting procedures as follows:

1. If an error is detected by the battery test, perform the Power Supply Troubleshooting procedures in Section 2.3.

2. If an error is detected by the display test, perform the Display Troubleshooting procedures in Section 2.4.

3. If an error is detected by the floppy disk test, perform the FDD Troubleshooting procedures in Section 2.5.

4. If an error is detected by the keyboard test, perform the Keyboard Troubleshooting procedures in Section 2.6.

5. If an error is detected by the printer (parallel) port test, perform the Printer Port

Troubleshooting procedures in Section 2.9.

6. If an error is detected by the TouchPad test, perform the TouchPad Troubleshooting procedures in Section 2.10.

7. If an error is detected by the audio test, perform the Speaker Troubleshooting procedures in Section 2.11 and the Optical Drive Troubleshooting Procedures in Section 2.12.

8. If an error is detected by the modem test, perform the Modem Troubleshooting

Procedures in Section 2.13.

Satellite P20-25 Series Maintenance Manual 2-5

2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart

Other problems that are not covered by the diagnostics program may be discovered by a user.

1. If an error is detected when using an external USB device, perform the External USB

Devices Troubleshooting procedures in Section 2.7.

2. If an error is detected when using the TV-out connection, perform the TV-Out Failure

Troubleshooting procedures in Section 2.8.

3. If an error is detected when using the speakers, perform the Speaker Troubleshooting procedures in Section 2.11.

4. If an error is detected when using the modem, perform the Modem Troubleshooting procedures in Section 2.13.

5. If an error is detected when using the PCMCIA unit, perform the PCMCIA

Troubleshooting procedures in Section 2.14.

6. If an error is detected when using the IEEE1394 device, perform the IEEE1394 device

Troubleshooting procedures in Section 2.15.

7. If an error is detected when using the Wireless LAN, perform the Wireless LAN

Troubleshooting procedures in Section 2.16.

8. If an error is detected when using the Bluetooth, perform the Bluetooth Troubleshooting procedures in Section 2.17.

2-6 Satellite P20-25 Series Maintenance Manual

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

ST ART

Check Power Supply Status

(Procedure 1)

Are the D C -IN and

B attery LED s lit?

Yes

Check power supply connections

(P rocedure 3)

N o

R eplace adaptor / battery

(Procedure 2)

Can you turn the computer on?

N o

A re the internal power connections secure?

Yes

Replace system board

Y es

R un diagnostic program

(Procedure 4)

N o

P erform internal connection check

(Procedure 5)

EN D

Figure 2-2 Power Supply Troubleshooting Process

Satellite P20-25 Series Maintenance Manual 2-7

2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

The power supply controls many functions and components. To determine if the power supply is functioning properly, start with Procedure 1 and continue with the other Procedures as instructed.

The flowchart in Figure 2-2 gives a summary of the process. The procedures described in this section are:

Procedure 1: Power status check

Procedure 2: Adaptor / battery replacement

Procedure 3: Power supply connection check

Procedure 4: Diagnostic check

Procedure 5: Internal connection check

Procedure 1 Power Status Check

The following LEDs indicate the power supply status:

Battery LED

DC-IN LED

The power supply controller displays the power supply status through the Battery and the DC-IN

LEDs as listed in the tables below.

Table 2-1 Battery LED

Battery State LED colors

Charging Amber, solid on

Discharging

Definition

Battery charging with AC .

Green, solid on

Green color off

Battery fully charged by AC

Battery abnormal stop charging with AC

(Bad cell/ Overheated)

Amber, blinking

(LED on for 1 second remaining every 4 seconds)

Battery within low state: 12 minutes

Amber, blinking Battery within critical low state: 3

(LED on for 1 second every 2 seconds) minutes remaining. The system is protected and cannot be re-powered on without the AC power connected.

Amber color off Battery not in low or critical low state;

It’s in discharging state

2-8 Satellite P20-25 Series Maintenance Manual

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

Table 2-2 DC-IN LED

AC-IN LED Power supply status

Solid on AC power exists (LED is solid green).

Off No AC power exists.

To check the power supply status, install a battery pack and connect an AC adaptor to the DC-IN port on the computer and to a power supply.

If the DC-IN LED or Battery LED is not lit, go to Procedure 2.

Procedure 2 Adaptor / battery replacement

A faulty adaptor may not supply power or may not charge the battery. Perform Check 1.

Check 1 Connect a new AC adaptor. If the problem is not resolved, go to Check 2.

Check 2 Insert a new battery. If the problem is still not resolved, go to Procedure 3.

Satellite P20-25 Series Maintenance Manual 2-9

2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

Procedure 3 Power supply connection check

The power supply wiring diagram is shown below:

AC adaptor cord

AC power cord

AC adaptor

System board

Battery

Any of the connectors may be disconnected. Perform Check 1.

Check 1 Disconnect the AC power cord from wall outlet. Check the power cable for breaks. If the power cord is damaged, connect a new AC power cord. If there is no damage, go to Check 2.

Check 2 Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC-

IN socket, AC adaptor inlet and wall outlet. If these cables are connected correctly, go to Check 3.

Check 3 Make sure that the DC-IN input port socket is firmly secured to the system board of the computer.

• If the DC-IN input socket is loose, go to Procedure 5.

• If it is not loose, go to Check 4.

Check 4 Use a multi-meter to make sure that the AC adaptor output voltage is close to 19 V.

If the output is several percent lower than 19 V, go to Check 5. If the output is close to 19 V, go to Check 6.

Check 5 Connect a new AC adaptor or AC power cord.

• If the DC-IN LED does not light, go to Procedure 4.

• If the battery LED does not light, go to Check 6.

Check 6 Make sure the battery pack is installed in the computer correctly. If the battery is properly installed and the battery LED still does not light, go to Procedure 4.

2-10 Satellite P20-25 Series Maintenance Manual

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

Procedure 4 Diagnostic check

The power supply may not charge the battery pack. Perform the following procedures:

1. Reinstall the battery pack.

2. Attach the AC adaptor and turn on the power. If you cannot turn on the power, go to

Procedure 5.

3. Run the Diagnostic test following the procedures described in Chapter 3, Tests and

Diagnostics. If no problem is detected, the battery is functioning normally.

Procedure 5 Replacement check

The system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures . Check the connection between the AC adaptor and the system board. After checking the connection, perform Check 1:

Check 1 Use a multi-meter to make sure that the fuses on the system board are not blown. If a fuse is not blown, go to Check 2. If a fuse is blown, go to Check 3.

Check 2 Make sure that the battery cable is firmly connected to the system board. If it is connected firmly, go to Check 3.

Check 3 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

Satellite P20-25 Series Maintenance Manual 2-11

2 Troubleshooting Procedures 2.4 Display Troubleshooting

2-12

S T A R T

P e rfo rm e x te rn a l d is p la y c h e c k

(P ro c e d u re 1 )

Y e s

D o e s th e e x te rn a l d isp la y fu n c tio n o k ?

N o

P e rfo rm d ia g n o s tic c h e c k

(P ro c e d u re 2 )

W a s a d is p la y p ro b le m d e te c te d ?

Y e s

P e rfo rm c o n n e c to r a n d re p la c e m e n t c h e c k

(P ro c e d u re 3 )

R e p la c e s y ste m b o a rd

N o

D is p la y is n o t fa u lty . C o n tin u e tro u b le s h o o tin g re fe r to F ig u re 2 .1

E N D

Figure 2-3 Display troubleshooting process

Satellite P20-25 Series Maintenance Manual

2.4 Display Troubleshooting 2 Troubleshooting Procedures

This section describes how to determine if the computer’s display is functioning properly. The process is outlined in Figure 2-3. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: External display check

Procedure 2: Diagnostic check

Procedure 3: Connector and replacement check

Procedure 1 External display check

Connect an external display to the computer’s external monitor port, then boot the computer.

The computer automatically detects the external display.

If the external display works correctly, the internal LCD may be damaged. Go to Procedure 3.

If the external monitor appears to have the same problem as the internal monitor, the system board may be damaged. Go to Procedure 2.

Procedure 2 Diagnostic check

The Display Test program is stored on the computer’s Diagnostics disk. This program checks the display controller on the system board. Insert the Diagnostics disk in the computer’s floppy disk drive, turn on the computer and run the test. Refer to Chapter 3, Tests and Diagnostics for details.

If an error is detected, go to Procedure 3. If an error is not detected, the display is functioning properly.

Satellite P20-25 Series Maintenance Manual 2-13

2 Troubleshooting Procedures 2.4 Display Troubleshooting

Procedure 3 Connector and replacement check

The FL inverter board, LCD module, and system board are connected to the display circuits.

Any of these components may be damaged. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks:

Check 1 Make sure the DDR RAM module is seated properly. Test display again. If the problem still exits, replace the DDR RAM module. If the problem still exists, perform Check 2.

Check 2 Replace the FL inverter board with a new one and test display again. If the problem still exists, perform Check 3.

Check 3 Replace the LCD module with a new one and test display again. If the problem still exists, perform Check 4.

Check 4 Replace the LCD/FL cable with a new one and test display again. If the problem still exists, perform Check 5.

Check 5 Replace the CPU with another of the same specifications. If the problem still exists, perform Check 6.

Check 6 The system board may be damaged. Replace it with a new one.

2-14 Satellite P20-25 Series Maintenance Manual

2.5 FDD Troubleshooting 2 Troubleshooting Procedures

S T A R T

P e rfo rm F D D h e a d c le a n in g c h e c k

(P ro c e d u re 1 )

P e rfo rm d ia g n o stic c h e c k

(P ro c e d u re 2 )

W a s a F D D p ro b le m d e te c te d ?

Y e s

P e rfo rm c o n n e c to r a n d re p la c e m e n t c h e c k

(P ro c e d u re 3 )

R e p la c e s y ste m b o a rd

N o

F D D is n o t fa u lty .

C o n tin u e tro u b le sh o o tin g re fe r to F ig u re 2 .1

E N D

Figure 2-4 FDD troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-15

2 Troubleshooting Procedures 2.5 FDD Troubleshooting

This section describes how to determine if the removable FDD module is functioning properly.

Perform the steps below starting with Procedure 1 and continuing as required. Figure 2-4 gives an outline of the process.

Procedure 1: FDD head cleaning check

Procedure 2: Diagnostic check

Procedure 3: Connector check and replacement check

Procedure 1 FDD head cleaning check

The FDD heads can become dirty over time, affecting their performance. Use an FDD cleaning kit to clean the heads. If the FDD still does not function properly after cleaning, go to Procedure

2.

Procedure 2 Diagnostic check

Insert the Diagnostics Disk in the FDD, turn on the computer and run the test. Refer to Chapter

3, Tests and Diagnostics, for more information about the diagnostics test procedures.

If no FDD problem is detected by the diagnostic test, the FDD is functioning normally. If an error occurs, go to Procedure 3.

Procedure 3 Connector check and replacement check

The 3.5-inch FDD is connected to the system board. Refer to Chapter 4, Replacement

Procedures, for instructions on how to disassemble the computer and then perform the following checks:

Check 1 Make sure the FDD flexible cable is firmly connected to the FDD and system board.

If any of the connections are loose, reconnect firmly and repeat Procedure 2. If any of the connections is damaged, or there is still an error, go to Check 2.

Check 2 The FDD unit or FDD flexible cable may be defective or damaged. Replace each with a new one following the steps in Chapter 4. If the FDD is still not functioning properly, perform Check 3.

Check 3 Replace the system board with a new one following the steps in Chapter 4.

2-16 Satellite P20-25 Series Maintenance Manual

2.6 Keyboard Troubleshooting 2 Troubleshooting Procedures

S T A R T

P e rfo rm e x te rn a l k e y b o a rd c h e c k

(P ro c e d u re 1 )

N o

D o e s th e e x te rn a l k e y b o a rd fu n c tio n o k ?

Y e s

P e rfo rm d ia g n o s tic c h e c k

(P ro c e d u re 2 )

W a s a k e y b o a rd p ro b le m d e te c te d ?

Y e s

P e rfo rm c o n n e c to r a n d re p la c e m e n t c h e c k

(P ro c e d u re 3 )

R e p la c e s y ste m b o a rd

N o

K e y b o a rd is n o t fa u lty . C o n tin u e tro u b le s h o o tin g re fe r to F ig u re 2 .1

E N D

Figure 2-5 Keyboard troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-17

2 Troubleshooting Procedures 2.6 Keyboard Troubleshooting

To determine if the computer’s keyboard is functioning properly, perform the following procedures. Figure 2-5 outlines the process. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: External keyboard check

Procedure 2: Diagnostic check

Procedure 3: Connector and replacement check

Procedure 1 External keyboard check

Connect a USB keyboard to one of the computer’s USB ports, then boot the computer. The computer automatically detects the external keyboard.

If the external keyboard works correctly, the internal keyboard or its connections may be faulty.

Go to Procedure 2.

If the external keyboard appears to have the same problem as the internal keyboard, the system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

Procedure 2 Diagnostic check

Run the Diagnostic Program, which will automatically execute the Keyboard Test. Refer to

Chapter 3, Tests and Diagnostics for more information on how to run the program.

If an error is located, go to Procedure 3. If an error does not occur, the keyboard is functioning properly.

Procedure 3 Connector and replacement check

The keyboard and/or system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks.

Check 1 Make sure the keyboard cable is firmly connected to the system board.

If the connection is loose, reconnect firmly and repeat Procedure 2. If there is still an error, go to Check 2.

Check 2 The keyboard may be damaged. Replace it with a new one following the instructions in Chapter 4.

If the problem still exists, perform Check 3.

Check 3 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

2-18 Satellite P20-25 Series Maintenance Manual

2.7 External USB Devices Troubleshooting

2.7 External USB Devices Troubleshooting

2 Troubleshooting Procedures

S T A R T

P e rfo rm e x te rn a l d e v ic e a n d c o n n e c tio n c h e c k

(P ro c e d u re 1 )

C h e c k U S B p o rt c o n n e c tio n

Y e s

D o e s th e d e v ic e fu n c tio n w h e n c o n n e c te d to a d iffe re n t U S B p o rt?

N o

D o e s a n a lte rn a tiv e U S B d e v ic e fu n c tio n c o rre c tly ?

Y e s

O rig in a l U S B d e v ic e is fa u lty

N o

R e p la c e s y ste m b o a rd

(P ro c e d u re 2 )

E N D

Figure 2-6 External USB device troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-19

2 Troubleshooting Procedures 2.7 External USB Devices Troubleshooting

To determine if the computer’s external USB devices are functioning properly, perform the following procedures. Figure 2-6 outlines the process. Start with Procedure 1 and continue as instructed.

Procedure 1: External device and connection check

Procedure 2: Replace system board

Procedure 1 External device and connection check

The USB device may be damaged or the connection may be faulty. Perform Check 1.

Check 1 Make sure USB device cable is firmly plugged into one of the USB sockets. If the cable is connected correctly, go to Check 2.

Check 2 Plug the USB device into another USB socket (there are three in all). If the USB device still does not work, go to Check 4.

If the device functions correctly when connected to another USB port, go to Check 3.

Check 3 Make sure that the USB socket is firmly secured to the system board of the computer.

If the malfunction remains, the system board may be damaged. Go to Procedure 2.

Check 4 Connect an alternative USB device to one of the computer’s USB ports, and then boot the computer. The computer automatically detects the external device.

If the alternative USB device works correctly, the original device may be damaged and should be replaced.

If the alternative USB device appears to have the same problem as the original device, the system board may be damaged. Go to Procedure 2.

Procedure 2 Replace system board

If the error persists, the system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

2-20 Satellite P20-25 Series Maintenance Manual

2.8 TV-Out Failure Troubleshooting

2.8 TV-Out Failure Troubleshooting

S T A R T

P e rfo rm T V c o n n e c tio n c h e c k

(P ro c e d u re 1 )

2 Troubleshooting Procedures

D o e s re p la c e m e n t T V c a b le fu n c tio n p ro p e rly ?

N o

P e rfo rm T V se t c h e c k

(P ro c e d u re 2 )

N o R e p la c e T V c a b le

T V fu n c tio n in g o k ?

Y e s

R e p la c e s y ste m b o a rd

E N D

N o

U se d iffe re n t T V s e t

Figure 2-7 TV-out troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-21

2 Troubleshooting Procedures 2.8 TV-Out Failure Troubleshooting

To determine if the computer’s TV-out port is functioning properly, perform the following procedures. Figure 2-7 outlines the process. Start with Procedure 1 and continue as instructed.

Procedure 1: TV connection check

Procedure 2: TV set check

Procedure 1 TV connection check

The TV cable may be damaged or the connections may be loose. Perform Check 1:

Check 1 Make sure TV cable is firmly plugged into both the TV set and the TV-out port of the computer. If the cable is connected correctly, go to Check 2.

Check 2 Make sure the TV-out port is firmly secured to the system board of the computer. If the malfunction remains, go to Check 3.

Check 3 The TV cable may be damaged. Replace with a good cable. If the malfunction remains, go to Procedure 2.

Procedure 2 TV set check

The TV set may be faulty. Perform Check 1:

Check 1 Try using the set for television reception. If it does not work, the set may be damaged. If the set does work, perform Check 2.

Check 2 Try connecting a different television to the computer. If the replacement television works, the original set may be damaged. If the replacement set does not work the system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

2-22 Satellite P20-25 Series Maintenance Manual

2.9 Printer Port Troubleshooting

2.9 Printer Port Troubleshooting

START

Perform diagnostic check

(Procedure 1)

2 Troubleshooting Procedures

No

Does the print port function ok?

Yes

Perform print port loopback check

(Procedure 2)

Was a print port problem detected?

Yes

Replace system board

(Procedure 3)

No

Print port is not faulty continue troubleshooting refer to Figure 2.1

END

Figure 2-8 Printer port troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-23

2 Troubleshooting Procedures 2.9 Printer Port Troubleshooting

To determine if the computer’s printer (parallel) port is functioning properly, perform the following procedures. Figure 2-8 outlines the process. Start with Procedure 1 and continue as instructed.

Procedure 1: Diagnostic check

Procedure 2: Printer port loopback check

Procedure 3: Replace system board

Procedure 1 Diagnostic check

Attach the printer port loopback connector firmly to the printer port and run the Diagnostic

Program. See Chapter 3 for details. If the printer port test passes, there may be a problem with the printer. Go to Procedure 2. If the printer port test fails, go to Procedure 3.

Procedure 2 Printer port loopback check

The printer may be faulty or not connected properly. Perform Check 1.

Check 1 Make sure printer cable is firmly plugged into both the printer and the printer port of the computer. If the cable is connected correctly, go to Check 2.

Check 2 Make sure the printer port is firmly secured to the system board of the computer. If the malfunction remains, go to Check 3.

Check 3 The printer cable may be damaged. Replace with a good cable. If the malfunction remains, go to Check 4.

Check 4 The printer may be faulty. Replace it with a good printer or connect it to a different computer.

If the replacement printer works or the original printer does not work on a different computer, the printer should be replaced.

If the replacement printer does not work either, or the original printer functions normally on a different computer, go to Procedure 3.

Procedure 3 Replace system board

The system board may be damaged. Replace it with a new one following the instructions in

Chapter 4.

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2.10 Touch Pad Troubleshooting

2.10 TouchPad Troubleshooting

START

TouchPad connection check (Procedure 1)

2 Troubleshooting Procedures

TouchPad replacement check (Procedure 2)

Replace system board

END

Figure 2-9 TouchPad troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-25

2 Troubleshooting Procedures 2.10 TouchPad Troubleshooting

To determine if the computer’s built-in TouchPad is functioning properly, perform the following procedures. Figure 2-9 outlines the process. Start with Procedure 1 and continue as instructed.

Procedure 1: TouchPad connection check

Procedure 2: TouchPad replacement check

Procedure 1 TouchPad connection check

The TouchPad is connected via the TouchPad FPC to the system board. Make sure the TouchPad

FPC cable is firmly connected to the TouchPad and system board. Refer to Chapter 4,

Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks.

If any of the connections are loose, reconnect firmly. If any of the connections is damaged, or there is still an error, go to Procedure 2.

Procedure 2 TouchPad replacement check

The TouchPad unit or FPC may be defective or damaged. Replace each with a new one following the steps in Chapter 4. If the FDD is still not functioning properly, replace the system board with a new one following the steps in Chapter 4.

2-26 Satellite P20-25 Series Maintenance Manual

2.11 Speaker Troubleshooting

2.11 Speaker Troubleshooting

START

Perform audio source test

(Procedure 1)

2 Troubleshooting Procedures

Do all sources have same problem?

Yes

Perform earphone test

(Procedure 2)

No

Speakers are not faulty. Continue troubleshooting see Figure 2-1

Do earphones function correctly?

No

Yes

Perform connection check

(Procedure 3)

Perform replacement check

(Procedure 4)

Replace system board

END

Figure 2-10 Speaker troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-27

2 Troubleshooting Procedures 2.11 Speaker Troubleshooting

To determine if the computer’s built-in speakers are functioning properly, perform the following procedures. Figure 2-10 outlines the process. First adjust the speaker volume to an appropriate level. Start with Procedure 1 and continue as instructed.

Procedure 1: Audio source test

Procedure 2: Earphone test

Procedure 3: Connection check

Procedure 4: Replacement check

Procedure 1 Audio source test

Try different audio sources (e.g. an audio CD and digital music file) to determine whether the fault is in the speaker system or not. If not all sources have sound problem, the problem is in the source devices. If all have the same problem, continue with Procedure 2.

Procedure 2 Earphone test

Connect a set if earphones or external speakers. If these function correctly, go to Procedure 3. If they do not function correctly, the system board may be defective or damaged. Replace it with a new one.

Procedure 3 Connection check

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and make sure the speaker cable is firmly connected to the audio board. If the stereo speakers are still not functioning properly, go to Procedure 4.

Procedure 4 Replacement check

If the stereo speakers don't sound properly, the stereo speakers may be defective or damaged.

Replace them with new ones. If the stereo speakers still do not work properly, try replacing in turn the audio board and system board.

2-28 Satellite P20-25 Series Maintenance Manual

2.12 Optical Drive Troubleshooting

2.12 Optical Drive Troubleshooting

START

Perform audio CD check

(Procedure 1)

2 Troubleshooting Procedures

Audio CD functions ok?

No

Perform drivecleaning check

(Procedure 2)

Yes

Perform software check

(Procedure 3)

Perform diagnostic test

(Procedure 4)

Perform connection and replacement check

(Procedure 5)

Replace system board

END

Figure 2-11 Optical drive troubleshooting process

Satellite P20-25 Series Maintenance Manual 2-29

2 Troubleshooting Procedures 2.12 Optical Drive Troubleshooting

This section describes how to determine if the computer’s internal optical drive is functioning properly. The Satellite P20 module bays can accommodate the following optical drives:

• DVD-R/RW device

• DVD-ROM device

• DVD Multi-drive device

• COMBO device

Figure 2-11 outlines the process. Perform the steps below starting with Procedure 1 and continue with the other procedures as required.

Procedure 1: Audio CD test

Procedure 2: Drive cleaning check

Procedure 3: Software check

Procedure 4: Diagnostic test

Procedure 5: Connection and replacement check

Procedure 1 Audio CD check

First, insert an audio CD into the CD/DVD drive. If it works, the problem is not with the drive.

Go to Procedure 3. If the audio CD does not work, go to Procedure 2. If the CD/DVD LED on the front panel does not light when the disc is played and the drive gives no response, go straight to Procedure 3.

Procedure 2 Drive cleaning check

Insert a CD/DVD drive-cleaning disk into the drive clean according to the drive-cleaning product instructions. If the problem persists, go to Procedure 3.

Procedure 3 Software check

Ensure that the appropriate driver has been installed on the computer for the CD/DVD drive.

Procedure 4 Diagnostic test

The audio test program stored in the Diagnostics Disk will test the drive’s ability to play an audio

CD. See Chapter 3 for details.

If any errors occur while executing the diagnostic program, go to Procedure 5.

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2.12 Optical Drive Troubleshooting 2 Troubleshooting Procedures

Procedure 5 Connection check and replacement check

The optical drive connects to the system board. The drive may be disconnected, or the drive or system board may be damaged. Disassemble the computer following the steps described in

Chapter 4, Replacement Procedures , and perform the following checks:

Check 1 Make sure the drive is firmly connected to the system board. If the connection is good and there is still an error, go to Check 2.

Check 2 The drive or drive cable may be defective or damaged. Replace each with a new one following the steps in Chapter 4, Replacement Procedures . If the drive is still not functioning properly, perform Check 3.

Check 3 The system board may be damaged. Replace it with new one following the instructions in Chapter 4, Replacement Procedures.

Satellite P20-25 Series Maintenance Manual 2-31

2 Troubleshooting Procedures

2.13 Modem Troubleshooting

START

Perform telephone line connection check

(Procedure 1)

2.13 Modem Troubleshooting

Computer unable to detect telephone signal?

Yes

Check / replace telephone line and connections

No

Perform connection check

(Procedure 2)

Perform replacement check

(Procedure 3)

Replace system board

END

Figure 2-12 Modem troubleshooting process

2-32 Satellite P20-25 Series Maintenance Manual

2.13 Modem Troubleshooting 2 Troubleshooting Procedures

This section describes how to determine if the computer's modem is functioning properly. Figure

2-12 outlines the process. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.

Procedure 1: Telephone line connection check

Procedure 2: Modem card connection check

Procedure 3: Modem card replacement check

Procedure 1 Telephone line connection check

The telephone cable may be damaged or the connections may be loose. Attempt to connect the computer to a network through using the modem. If the modem does not function at all, go to

Procedure 3. If the attempt fails because the computer detects no telephone signal, the fault may be in the telephone cable, the wall socket or the modem port. Perform Check 1:

Check 1 Make sure telephone cable is firmly plugged into both the telephone wall socket and the modem port of the computer. If the cable is connected correctly, go to Check 2.

Check 2 Make sure the modem port is firmly secured to the system board of the computer. If the malfunction remains, go to Check 3.

Check 3 The telephone cable may be damaged. Replace with a good cable. If the malfunction remains, go to Procedure 2.

Procedure 2 Modem card connection check

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and ensure that the modem card is well connected to the system board. If the problem persists, perform Procedure 3.

Procedure 3 Modem replacement check

The modem card or RJ-11 jack may be faulty. Try replacing them. If the problem persists, the system board may be defective or damaged. Replace the System Board with a new one following the steps in Chapter 4, Replacement Procedures .

Satellite P20-25 Series Maintenance Manual 2-33

2 Troubleshooting Procedures

2.14 PCMCIA Troubleshooting

START

Perform SYCARD test

(Procedure 1)

2.14 PCMCIA Troubleshooting

Do errors occur during

SYCARD test?

No

PCMCIA unit is not faulty.

Yes

Perform PCMCIA socket replacement check

(Procedure 2)

Replace system board

END

Figure 2-13 PCMCIA troubleshooting process

2-34 Satellite P20-25 Series Maintenance Manual

2.14 PCMCIA Troubleshooting 2 Troubleshooting Procedures

This section describes how to determine if the PCMCIA card player is functioning properly. The process is summarized in Figure 2-13. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.

Procedure 1: Sycard test

Procedure 2: PCMCIA socket replacement check

Procedure 1 SYCARD test

The SYCARD test card contains a PCMCIA test program. Ensure the card in fully inserted into the socket before running the program.

If an error occurs during the SYCARD test, perform Procedure 2. If no error occurs, it is likely that the original PC card was faulty.

Procedure 2 PCMCIA socket replacement check

The PCMCIA socket may be damaged or defective, for instance the socket pins can be bent.

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and replace the socket. If the problem persists, the system board may be defective or damaged.

Replace the system board with a new one following the steps in Chapter 4.

Satellite P20-25 Series Maintenance Manual 2-35

2 Troubleshooting Procedures

2.15 IEEE 1394 Troubleshooting

START

Perform IEEE 1394 device check

(Procedure 1)

2.15 IEEE 1394 Troubleshooting

No

Is IEEE 1394 transmission ok?

Yes

Perform diagnostic check

(Procedure 2)

Was an IEEE 1394 problem detected?

Yes

Perform connection and replacement check

(Procedure 3)

No

IEEE 1394 port and transmission are not faulty. Continue troubleshooting - refer to Figure 2.1

Replace system board

2-36

END

Figure 2-14 IEEE 1394 troubleshooting process

Satellite P20-25 Series Maintenance Manual

2.15 IEEE 1394 Troubleshooting 2 Troubleshooting Procedures

To determine if the computer’s IEEE 1394 system is functioning properly, perform the following procedures. Figure 2-14 outlines the process. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: IEEE 1394 device check

Procedure 2: Diagnostic check

Procedure 3: Connection and replacement check

Procedure 1 IEEE 1394 device check

Connect an IEEE 1394 device to the computer’s IEEE 1394 port, then boot the computer for

Windows XP. The computer should automatically detect the 1394 device. Check whether the device can transmit data to the computer.

If the device is able to communicate with the computer, the problem may be intermittent or connections may be faulty. Go to Procedure 2.

If communication is impaired, there may be a faulty connection. Go to Procedure 3.

Procedure 2 Diagnostic check

Run the Diagnostic Program, which will automatically execute the IEEE 1394 port test for transmission. Refer to Chapter 3, Tests and Diagnostics for more information on how to run the program.

If an error is located, go to Procedure 3. If an error does not occur, the 1394 port is functioning properly.

Procedure 3 Connection and replacement check

The transmission cable may be damaged or the connections may be loose. Perform Check 1:

Check 1 Make sure the transmission cable is firmly plugged into both the IEEE 1394compatible device and the IEEE 1394 port of the computer. If the cable is connected correctly, go to Check 2.

Check 2 Make sure the IEEE 1394 port is firmly secured to the system board of the computer.

If the malfunction persists, go to Check 3.

Check 3 The transmission cable may be damaged. Replace with a good cable. If the malfunction persists, go to Check 4

Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

Satellite P20-25 Series Maintenance Manual 2-37

2 Troubleshooting Procedures

2.16 Wireless LAN Troubleshooting

START

2.16 Wireless LAN Troubleshooting

Perform diagnostic test

(Procedure 1)

Was a wireless LAN problem delected?

Yes

Perform connector and replacement check

(Procedure 2)

No

Wireless LAN system is not faulty. Continue troubleshooting - refer to Figure 2.1

Replace wireless LAN antenna/unit

Replace system board

2-38

END

Figure 2-15 Wireless LAN troubleshooting process

Satellite P20-25 Series Maintenance Manual

2.16 Wireless LAN Troubleshooting 2 Troubleshooting Procedures

The wireless LAN antenna wire, wireless LAN unit or system board may each be the source of a wireless LAN fault. Any of these components may be damaged. To determine if the computer’s wireless LAN system is functioning properly, perform the following procedures. Figure 2-15 outlines the process. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: Diagnostic test

Procedure 2: Connector and replacement check

Procedure 1 Diagnostic test

Run the Diagnostic Program, which will automatically execute the wireless LAN test. Refer to

Chapter 3, Tests and Diagnostics for more information on the program.

If an error is located, go to Procedure 2. If an error is not located, the wireless LAN system is functioning properly.

Procedure 2 Connector and replacement check

The wireless LAN antenna, wireless LAN unit or system board may be disconnected or damaged.

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures , and perform the following checks.

Check 1 Make sure that the wireless LAN antenna is firmly connected to the wireless LAN unit (refer to Chapter 4 for instructions) and that the wireless LAN unit is securely slotted into the system board. If the problem persists, go to Check 2.

Check 2 Check that the wireless communication switch is turned to “On”, then make sure that the wireless communication LED on the front panel is lit. If the LED is lit but the wireless LAN function is still faulty, the antenna may be damaged. Replace with a new antenna following the steps in Chapter 4, Replacement Procedures . If the problem persists, or if the wireless LAN LED is not lit when the wireless communication switch is turned to “On”, go to Check 3.

Check 3 The wireless LAN unit may be damaged. Replace it with a new one following the instructions in Chapter 4. If the problem still exists, perform Check 4.

Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

Satellite P20-25 Series Maintenance Manual 2-39

2 Troubleshooting Procedures

2.17 Bluetooth Troubleshooting

START

Preform diagnostic test

(Procedure 1)

2.17 Bluetooth Troubleshooting

Was a Bluetooth problem detected?

Yes

Perform connector and replacement check

(Procedure 2)

No

Bluetooth is not faulty.

Continue troubleshooting-refer to Figure 2.1

Replace Bluetooth module

Replace system board

END

Figure 2-16 Bluetooth troubleshooting process

2-40 Satellite P20-25 Series Maintenance Manual

2.17 Bluetooth Troubleshooting 2 Troubleshooting Procedures

The Bluetooth antenna wire, Bluetooth module or system board may be the source of a Bluetooth fault. Any of these components may be damaged. To determine if the computer’s Bluetooth system is functioning properly, perform the following procedures. Figure 2-16 outlines the process. Start with Procedure 1 and continue as instructed.

Procedure 1: Diagnostic test

Procedure 2: Connector and replacement check

Procedure 1 Diagnostic test

Run the Diagnostic Program, which will automatically execute the Bluetooth test. Refer to

Chapter 3, Tests and Diagnostics for more information on the program.

If an error is located, go to Procedure 2. If an error is not located, the Bluetooth system is functioning properly.

Procedure 2 Connector and replacement check

The Bluetooth, antenna module or system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures , and perform the following checks.

Check 1 Make sure that the Bluetooth antenna is firmly connected to the Bluetooth module

(refer to Chapter 4 for instructions) and that the Bluetooth FFC is securely slotted into the system board. If the problem persists, go to Check 2.

Check 2 Check that the communication switch is turned to “On”, then make sure that the communication LED on the left panel is lit. If the LED is lit but the Bluetooth function is still faulty, the antenna module may be damaged. Replace with a new antenna following the steps in Chapter 4, Replacement Procedures . If the problem persists, or if the Bluetooth communication LED is not lit when the Bluetooth communication switch is turned to “On”, go to Check 3.

Check 3 The Bluetooth module may be damaged. Replace it with a new one following the instructions in Chapter 4. If the problem still exists, perform Check 4.

Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4.

Satellite P20-25 Series Maintenance Manual 2-41

2 Troubleshooting Procedures 2.17 Bluetooth Troubleshooting

2-42 Satellite P20-25 Series Maintenance Manual

Chapter 3

Tests and Diagnostics

3. Tests and Diagnostics

3-ii Satellite P20-25 Series Maintenance Manual

Test and Diagnostic Operation

Contents

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

3.13 Mouse (Pad) Test ..................................................................................................... 3-18

3.14 LCD Pixels Mode Test............................................................................................. 3-20

3.15 Lid Switch Test ........................................................................................................ 3-21

3.16 HDD R/W Test......................................................................................................... 3-22

3.19 CD Control Button Test ........................................................................................... 3-27

Satellite P20-25 Series Maintenance Manual 3-iii

3. Tests and Diagnostics

3-iv Satellite P20-25 Series Maintenance Manual

3.1 The Diagnostic Test 3. Tests and Diagnostics

3.1 The Diagnostic Test

This chapter explains how to use the Test & Diagnostic program to test the functions of the computer’s hardware modules. The Test & Diagnostic Program is stored on the T&D diskettes. The program consists of a series of tests that run automatically when the

Diagnostics Program items are selected and executed.

NOTES: To start the diagnostics, follow these steps

1. Check all cables for loose connections.

2. Exit this program when you are at Main Menu.

The TEST & DIAGNOSTIC PROGRAM contains the following functional tests:

CONFIG CHECK TEST

DMI CHECK TEST

PIO LOOPBACK TEST

IEEE1394 TEST

SPEAKER AUDIO TEST

FAN ON/OFF TEST

MAIN BATTERY CHARGE TEST

FDD TEST

CD-ROM TEST

KEYBOARD TEST

MOUSE(PAD) TEST

LCD PIXELS MODE TEST

LID SWITCH TEST

HDD R/W TEST

LAN TEST

RTC TEST

You will need the following equipment to perform some of the Diagnostic test programs.

The diagnostics diskette (2 pcs)

A printer loopback connector (PIO Loopback Test)

A formatted working diskette for the floppy disk drive test (Floppy Disk Drive Test)

A data CD disc (CD-ROM Test)

A LAN loopback connector (LAN Test)

IEEE1394 Link Cable

The following sections explain how to execute the Test & Diagnostic Program and detail the tests within the program.

Satellite P20-25 Series Maintenance Manual 3-1

3. Tests and Diagnostics 3.2 Executing the Diagnostic Test

3.2 Executing the Diagnostic Test

Toshiba MS-DOS is required to run the DIAGNOSTICS PROGRAM. To start the

DIAGNOSTIC PROGRAM, follow these steps:

1. Insert the diagnostics diskette #1 in the floppy disk drive and turn on the computer.

(The diagnostics diskette contains the MS-DOS boot files.) And then follow the instructions to swap with the diagnostics diskette #2 for T&D program installed in

RAM driver.

NOTE : To execute the CD test, make sure the CD is installed in the CD/DVD-ROM drive.

The T&D Program can run by single test item when you press corresponsive English letter of test item, or run two or more test items what you like if you choose them by

“Arrow cursors” and “Space Bar” – the wonderful thing is you can setup test loop by

“Enter” button. And it also asks you if you like to copy test log file to diskette as reference at the end of test(s).

The test list is as the following:

A. CONFIG CHECK TEST

B. DMI CHECK TEST

C. PIO LOOPBACK TEST

D. IEEE1394 Test

E. SPEAKER AUDIO TEST

F. FAN ON/OFF TEST

G. MAIN BATTERY CHARGE TEST

H. FDD TEST

K. MOUSE (PAD) TEST

L. LCD PIXELS MODE TEST

M. LID SWITCH TEST

N. HDD R/W TEST

O. LAN TEST

P. RTC TEST

3-2 Satellite P20-25 Series Maintenance Manual

3.2 Executing the Diagnostic Test 3. Tests and Diagnostics

The below display will show up at the beginning of T&D program.

If the test result passes, the following display will show up:

Satellite P20-25 Series Maintenance Manual 3-3

3. Tests and Diagnostics 3.2 Executing the Diagnostic Test

If an error is detected and a test fails, the following message displays:

Then press any key for next actions – the below display presented if copying test log file onto diskette is necessary. This action will be executed when “ Y ” key pressed.

3-4

It will skip this process if “N” key pressed.

Satellite P20-25 Series Maintenance Manual

3.2 Executing the Diagnostic Test 3. Tests and Diagnostics

And then it will check if it’s necessary to leave this program. Program will quit when

“ Y ” key pressed and it will go back main menu for next test if “ N ” key pressed.

NOTE : Press to pause a test and Enter to resume.

Satellite P20-25 Series Maintenance Manual 3-5

3. Tests and Diagnostics 3.3 Config Check Test

3.3 Config Check Test

The config check test checks unit configuration. It includes:

CPU type

System memory size

ODD type

HDD type & capacity

BIOS version

This test needs input unit Part Number by manual to make comparison with known SKU data.

NOTE : To execute this test, you must input unit Part Number as “ Uppercase Character ”.

Then it will show its configuration is correct (in green color) or failed (in red color).

The screen should display as below, indicating whether the test is passed or failed after comparison.

3-6 Satellite P20-25 Series Maintenance Manual

3.4 DMI Check Test 3. Tests and Diagnostics

3.4 DMI Check Test

This test will check if the computer’s Desktop Management Interface (DMI) is correct.

DMI includes:

Manufacturer

Production Name

Version

Serial Number

UUID

OEM String

It needs to input unit Part Number by manual, then show this unit DMI information and makes comparison with SKU data.

NOTE : To execute this test, you must input unit Part Number as “ Uppercase Character ”.

The screen should display as below, indicating whether the test is passed or failed after comparison.

Satellite P20-25 Series Maintenance Manual 3-7

3-8

3. Tests and Diagnostics 3.5 PIO Loopback Test

3.5 PIO Loopback Test

The PIO loopback test will check below items through PIO loopback connector.

External Interrupt

External Loopback

- including Pattern test, Data Pin test, Control register test & Control pin/ Status pin test.

NOTE : Remember to connect a PIO loopback connector to the computer's printer port before test begins.

The screen should display as below, indicating whether the test is passed or failed when finished.

Satellite P20-25 Series Maintenance Manual

3.6 IEEE 1394 Test 3. Tests and Diagnostics

3.6 IEEE 1394 Test

The IEEE 1394 port test checks transmission between the computer and a secondary device along an IEEE 1394 line. An IEEE 1394 transmission line must be firmly connected between the computer and the device before the test is started. The test requires:

1. An IEEE 1394-compatible device

2. An IEEE 1394 transmission line

To perform the test:

1. Copy the following files from the BTR20.RAR file on the diagnostics disk to a bootable diskette

1394M.bat

TI.exe

TI1394.exe

2. Insert the disk, then boot the computer

3. Make sure the machines are firmly connected by the IEEE 1394 transmission line

4. Execute 1394M.bat on the computer

5. Select the IEEE 1394 transmission test for the test device

6. Start data transmission and complete check

Satellite P20-25 Series Maintenance Manual 3-9

3-10

3. Tests and Diagnostics 3.7 Speaker Audio Test

3.7 Speaker Audio Test

The speaker audio test allows the user to aurally confirm the speaker functions. And check both speakers if they are OK within 3 times “Beep” sound generated.

NOTE : Remember to tune up the volume as “ Maximum ” before this test starts.

The screen should display as below, indicating whether the test is passed or failed after the question.

Satellite P20-25 Series Maintenance Manual

3.8 Fan ON/OFF Test 3. Tests and Diagnostics

3.8 Fan ON/OFF Test

The fan test allows the user to test aurally whether the fan is working. And follow the below procedures for this test:

The computer will let the fan be “ON” after any key pressed. Listen to check whether the fan is working.

NOTE : Remember to approach fan outlet that is near right side of unit whether fan is

“ON”.

The computer will stop the fan working after any key pressed. Listen to check if the fan is “OFF” – it means no rotating sound.

The screen should display as below, indicating whether the test is passed or failed after the question.

Satellite P20-25 Series Maintenance Manual 3-11

3-12

3. Tests and Diagnostics 3.9 Main Battery Change Test

3.9 Main Battery Charge Test

NOTE : The AC adaptor ( 120W, 19V ) should be connected to successfully run this test.

This test shows and measures the main battery:

Battery type (Ni-MH / Lion)

Manufacturer (Sony / Sanyo)

Remain charge capacity (0 ~ 100%)

Charge function (PASS/FAIL)

- “Battery Is Full” showed when “remain charge capacity” is 100%

The screen should display as below, indicating whether the test is passed or failed when finished.

Satellite P20-25 Series Maintenance Manual

3.10 FDD Test 3. Tests and Diagnostics

3.10 FDD Test

NOTE : Before running the FDD test, prepare a formatted work diskette (1.44 MB).

Remove the diagnostics diskette and insert the work diskette into the FDD. The contents of the floppy diskette maybe erased.

The Floppy Disk Test includes three subtests of the:

1. Sequential seek/verify function (Range: Track 0 ~ 79)

2. Funnel code seek/verify function (Range: Track 0 ~ 79)

3. Write/Read/Compare pattern function (Range: Track 75 ~ 79)

NOTE : The write-protected device of this formatted diskette should be “Disable”.

The subtests run automatically.

NOTE : Press “ Esc ” key can skip the current subtest.

The screen should display as below, indicating whether the subtests pass or fail when finished.

Satellite P20-25 Series Maintenance Manual 3-13

3-14

3. Tests and Diagnostics 3.11 CD-ROM Test

3.11 CD-ROM Test

The CD-ROM test allows a user to aurally confirm the CD-ROM functions.

NOTE : A CD disc (including data file) must be inserted into the CD-ROM drive before this test starts.

The CD-ROM test includes two subtests of the:

1. Random read/partial sequential read function

2. Sequential read function (for all surface)

Each item can be chosen by manual. When each test item finished, the CD-ROM tray will open. Check whether the tray can open automatically.

NOTE : Press “ Esc ” key can skip the current subtest.

The screen should display as below, indicating whether the subtests pass or fail when finished.

Satellite P20-25 Series Maintenance Manual

3.12 Keyboard Test 3. Tests and Diagnostics

3.12 Keyboard Test

The keyboard test checks the all keys function.

NOTE: The Num Lock and the Overlay mode must be off to execute the keyboard test.

Before keyboard test starts, the keyboard matrix code should be chosen as below display:

1. K (UK, for Europe)

2. S (US, for America)

3. J (JP, for Japan)

When you execute this test, the keyboard layout is drawn on the display. When any key is pressed, the corresponding key on the screen changes to black as shown below.

It will indicate whether the subtest is passed or failed after the question.

NOTE: The “ Fn ” key cannot be tested in the keyboard test. To determine whether the “ Fn ” key is working correctly, press “ Fn+F6 ” or “ Fn + F7 ” keys to check if LCD display brightness change gradually.

Satellite P20-25 Series Maintenance Manual 3-15

3. Tests and Diagnostics 3.12 Keyboard Test

3-16 Satellite P20-25 Series Maintenance Manual

3.12 Keyboard Test 3. Tests and Diagnostics

Pressing a key also reveals that key’s scan codes in the upper right hand corner of the screen.

When the key is depressed, its make code is displayed. When the key is released, the break code is shown.

Satellite P20-25 Series Maintenance Manual 3-17

3. Tests and Diagnostics 3.13 Mouse (Pad) Test

3.13 Mouse (Pad) Test

The Mouse test allows the user to select and assign values to the following, using the Touch

Pad or “ Tab” key to move between selections:

1. Mouse Speed (on a scale from slow to fast)

2. Acceleration (Off, Low, Medium, High)

3. Button Assignments (Left + Right / Right button, either Unassigned or

Drag Lock)

4. Swap Buttons (Left /Right)

NOTE: The Touch Pad test cannot be used to test an external USB mouse.

The Touch Pad button subtest allows users to test their Touch Pad buttons. If the buttons are clicked, the cursors should appear in the corresponding box of the button figure that is displayed on the screen as below.

After checking T/Pad buttons and cursor’s function, use “Tab” key or use T/Pad cursor to click the “OK” column will end this test.

It will indicate whether the subtests pass or fail after three questions.

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3.13 Mouse (Pad) Test 3. Tests and Diagnostics

NOTE: The above figure has three compartments although the Touch Pad installed may only have two buttons. In this case, the central compartment in the figure does not correspond to any button.

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3-20

3. Tests and Diagnostics 3.14 LCD Pixels Mode Test

3.14 LCD Pixels Mode Test

This LCD pixels mode test checks whether video display is fine.

This test includes two modes of the test:

1. Text Mode

- including 40*25 (16 colors) and 80*25 (2/16colors).

2. VGA Mode

- including 320*200 (4/16/256 colors), 640*200 (2/16 colors), 640*350

(2/16 colors), 640*480 (2/16/256 colors), 800*600 (256 colors) and

1024*768 (256 colors).

The screen should display as below, indicating whether the test is passed or failed after the question.

Satellite P20-25 Series Maintenance Manual

3.15 Lid Switch Test 3. Tests and Diagnostics

3.15 Lid Switch Test

The lid switch test checks the lid function of the unit. When LCD cover closed, the lid should enable to turn off the display.

NOTE : Remember to tune up the volume as “ Maximum ” before this test starts.

Follow below steps to run this test:

1. Close the LCD cover.

2. Heard 3 “Beep” sound happened during LCD closed.

3. Open the LCD.

Then it will indicate whether the test is passed or failed.

Satellite P20-25 Series Maintenance Manual 3-21

3. Tests and Diagnostics 3.16 HDD R/W Test

3.16 HDD R/W Test

The HDD R/W test allows the user to test aurally HDD read/write function. For data security concern, it is necessary to input password - “ TOSHIBA ” before HDD write test starts.

The HDD test includes three subtests of the:

1. Sequential read (all surface)

2. Sequential write (all surface)

3. Partial W/R + Random W/R

After the choice is made, HDD information will show as below:

Model name

Firmware revision

Serial number

CHR (Cylinder High Register) mode – including cylinders, heads, sectors and sizes.

LBA (Logical Block Addressing) mode – including sectors and sizes.

Support Ultra DMA Mode

Support PIO Mode

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3.16 HDD R/W Test 3. Tests and Diagnostics

NOTE : Press “ Ctrl + Break ” keys can terminate the current subtest.

The screen should display as previous picture, indicating whether the subtest is passed or failed when finished.

NOTE : The AC adaptor should be connected to successfully run this test.

Satellite P20-25 Series Maintenance Manual 3-23

3. Tests and Diagnostics 3.17 LAN Test

3.17 LAN Test

The LAN test checks the LAN full-duplex environment.

NOTE: LAN loopback needs to plug in before test begins.

And LAN information will show on the test screen:

IO Base – Port: 3000H

IRQ – AH, it’s “IRQ 10”.

Node – it is “MAC Address”.

Line Frame – 1514 Bytes.

Line Speed – 100Mbps or 10 Mbps.

Bus ID – it’s “4”.

The LAN test includes two subtests of the:

1. Speed100

- in cluding Ethernet_802.2, Ethernet_II, Ethernet_SNAP and Ethernet_802.3. All test items are in LSB mode.

2. Speed10

- including Ethernet_802.2 in LSB mode.

The subtests run automatically.

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3.17 LAN Test 3. Tests and Diagnostics

The screen should display as below, indicating whether the subtests pass or fail when finished.

Satellite P20-25 Series Maintenance Manual 3-25

3. Tests and Diagnostics 3.18 RTC Test

3.18 RTC Test

Checks the computer’s RTC (Real Time Clock) and calendar functions by comparing the

DOS and CMOS values.

The test runs automatically.

The screen should display as below, indicating whether the test is passed or failed when finished.

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3.19 CD Control Button Test 3. Tests and Diagnostics

3.19 CD Control Button Test

The CD control button test allows the user to manually test each of the five CD control buttons.

The figure below will be displayed:

Press each of the buttons on the front panel in turn. A yellow bar will appear on the relevant section of the figure if the button passes the test.

Press Esc to quit the test.

Satellite P20-25 Series Maintenance Manual 3-27

3. Tests and Diagnostics 3.18 RTC Test

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Chapter 4

Replacement Procedures

4 Replacement Procedures

4-ii Satellite P20-25 Series Maintenance Manual

4 Replacement Procedures

Chapter 4 Contents

4.1 General....................................................................................................................... 4-1

4.2 Battery........................................................................................................................ 4-7

4.9 Wireless LAN Unit .................................................................................................. 4-25

4.11 Modem / Bluetooth Unit .......................................................................................... 4-31

4.12 CPU.......................................................................................................................... 4-34

4.13 HDD......................................................................................................................... 4-38

4.14 Keyboard.................................................................................................................. 4-42

4.16 Function Key Board................................................................................................. 4-48

4.17 LED / Power Button Board...................................................................................... 4-50

4.18 TouchPad ................................................................................................................. 4-52

4.21 Direct Play Button Board......................................................................................... 4-62

4.23 Direct play LED board............................................................................................. 4-66

4.25 Speakers ................................................................................................................... 4-70

4.28 FL Inverter Board .................................................................................................... 4-78

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4 Replacement Procedures

4-iv Satellite P20-25 Series Maintenance Manual

4.1 General 4 Replacement Procedures

4.1 General

This chapter explains how to disassemble the computer and replace Field Replaceable Units

(FRUs). It may not be necessary to remove all the FRUs in order to replace one. The chart below is a guide to which FRUs need to be removed in order to remove others. Always start by removing the battery pack, next, optional items such as the optional PC Card, then follow the chart downward removing only those FRUs necessary to reach the one you think is causing the computer to operate improperly. Refer to the example on the following page.

Battery pack

Main Module

PC

Card

Wireless

LAN

Unit

Expansion

Memory

Module

CPU

Modem /

Bluetooth

Unit Display

Assembly

System Board

Display

Mask

FL

Inverter

Board

HDD

Top Cover

Keyboard

Fan Set

LCD

Module

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4 Replacement Procedures 4.1 General

The example below shows FRUs to be removed before the LED / power button board can be removed and repaired or replaced. The LED / power button board is overlapped by the top cover which must be removed before the LED / power button board can be reached. The top cover is in turn overlapped by the removable main module, HDD and keyboard. Always starts the disassembly process by removing the battery pack.

Battery pack

Main Module

PC

Card

Wireless

LAN

Unit

Expansion

Memory

Module

CPU

Modem /

Bluetooth

Unit Display

Assembly

System Board

Display

Mask

FL

Inverter

Board

HDD

Top Cover

Keyboard

Fan Set

LCD

Module

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4.1 General 4 Replacement Procedures

Safety Precautions

Before you begin disassembly, read the following safety precautions and observe them carefully as you work.

DANGER:

1. Always use the lithium ion battery pack or backup battery that is authorized by

Toshiba or compatible with the unit. Since other battery packs have different specifications, they may be incompatible with the unit, and may burst or explode.

Heating or disassembling the battery pack could cause leakage of alkaline solution.

Throwing the battery pack into a fire could cause the battery pack to explode.

2. The power supply, FL inverter and other components carry high voltages. To avoid the risk of electric shock when you need to turn on the power of a partially disassembled computer to check its operation, be very careful not to touch connectors or components. Also, do not disassemble individual components in firstlevel maintenance.

WARNING: To avoid the risk of electric shock or other injury:

1. Always turn the power off and disconnect the AC adaptor from the power source.

2. Remove any metal jewelry or accessories such as necklaces, bracelets, or rings.

Batteries in the computer retain an electrical charge so there is danger of electrical shock even when the computer is disconnected from an AC power source.

3. Never work with wet or damp hands.

4. The computer contains sharp edges and corners: be careful not to injure yourself.

5. Make sure that all replacement components meet the specifications for the computer and that all cables and connectors are securely fastened.

CAUTION: To avoid damage to the computer:

1. When you change a component, be sure the replacement component meets the required specifications. Never use foreign parts.

2. Metal objects such as screws or paper clips which fall into the unit can cause a shortcircuit, fire, or other internal damage.

3. When assembling the computer, make sure you use the correct screws to secure the various pieces in place. Screw sizes are listed in their corresponding figure. Make sure all screws are securely fastened. Loose screws can cause short circuits, resulting in heat, smoke, or fire.

4. Before removing an FRU or other component, make sure all cables to the component have been disconnected.

5. If you use AC power, be sure to use the cable that came with the computer or one recommended by Toshiba.

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4 Replacement Procedures 4.1 General

Before You Begin

Look over the procedures in this section before you begin disassembling the computer.

Familiarize yourself with the disassembly and reassembly steps. Begin each procedure by removing the AC adaptor and the battery pack as instructed in section 4.2.

1. Do not disassemble the computer unless it is operating abnormally.

2. Use only the correct and approved tools.

3. Make sure the working environment is free from the following elements whether you are using or storing the computer.

Dust and contaminates

Static electricity

Extreme heat, cold and humidity

4. Make sure the FRU you are replacing is causing the abnormal operation by performing the necessary troubleshooting and diagnostics tests described in chapters

2 and 3 of this manual.

5. Do not perform any operations that are not necessary and use only the described procedures for disassembling and installing FRUs in the computer.

6. After removing parts from the computer, place them in a safe place away from the computer so they will not be damaged and will not interfere with your work.

7. You will remove and replace many screws when you disassemble the computer.

When you remove screws, make sure they are placed in a safe place and identified with the correct parts.

8. When assembling the computer make sure you use the correct screws to secure the various pieces. Screw sizes are listed in their corresponding figures.

9. The computer contains many sharp edges and corners, so be careful not to injure yourself.

10. After you have replaced an FRU, make sure the computer is functioning properly by performing the appropriate test on the FRU you have fixed or replaced.

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4.1 General 4 Replacement Procedures

Disassembly Procedures

The computer has two basic types of cable connectors:

Pressure Plate Connectors

Standard Pin Connectors

To disconnect a Pressure Plate connector, lift up the tabs on either side of the connector’s plastic pressure plate and slide the cable out of the connector. To connect the cable to a

Pressure Plate connector, make sure the pressure plate is fully lifted and slide the cable into the connector. Secure the cable in place by pushing the sides of the pressure plate down so the plate is flush with the sides of the connector. Gently pull on the cable to make sure the cable is secure. If you pull out the connector, connect it again making sure the connector’s pressure plate is fully lifted when you insert the cable.

Standard pin connectors are used with all other cables. These connectors can be connected and disconnected by simply pulling them apart or pushing them together.

Assembly Procedures

After you have disassembled the computer and fixed or repaired the problem that was causing the computer to operate abnormally, you will need to reassemble the computer.

Install all the removed FRUs following the steps described in the corresponding sections in this chapter.

While assembling the computer, remember the following general points:

Take your time, making sure you follow the instructions closely. Most problems arise when you get in a hurry assembling the computer.

Make sure all cables and connectors are securely fastened.

Before securing the FRU or other parts, make sure that no cables will be pinched by screws or the FRU.

Check that all latches are closed securely.

Make sure all the correct screws are used to secure all FRUs. Using the wrong screw can either damage the threads on the screw or the head of the screw and may prevent proper seating of an FRU.

After installing an FRU in the computer, confirm that the FRU and the computer are functioning properly.

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4 Replacement Procedures 4.1 General

Tools and Equipment

The use of Electrostatic Discharge (ESD) equipment is very important for your safety and the safety of those around you. Proper use of these devices will increase the success rate of your repairs and lower the cost for damaged or destroyed parts. The following equipment is necessary to disassemble and reassemble the computer:

One M2 Phillips screwdriver to remove and replace screws.

One T5 security screwdriver.

Tweezers, to lift out screws that you cannot grasp with your fingers.

ESD mats for the floor and the table you are working on.

ESD wrist strap or heel grounder.

Anti-static carpeting or flooring.

Air-ionizers in highly static sensitive areas.

4-6 Satellite P20-25 Series Maintenance Manual

4.2 Battery 4 Replacement Procedures

4.2 Battery

Removing the Battery Pack

To remove the battery pack from the 2 nd module bay, follow the steps below.

1. Turn the computer upside down.

2. Unlock 2 nd module bay lock . nd module bay latch to release it then pull the battery pack out from the bay.

Fig 4-1: Removing the battery pack

NOTE: For environmental reasons, do not throw away a spent battery pack. Please return spent battery packs to Toshiba.

Satellite P20-25 Series Maintenance Manual 4-7

4 Replacement Procedures 4.2 Battery

Installing the Battery Pack

To install the battery pack in the 2 nd module bay, follow the steps below and refer to the figure in the preceding section.

WARNING: The battery is a lithium ion battery and can explode if not properly replaced, used, handled or disposed of. Use only batteries recommended by Toshiba as replacements.

1. Slide the into the 2 nd module bay . The 2 nd automatically and secure the battery pack in position.

module bay latch will click

2 nd module bay lock .

4-8 Satellite P20-25 Series Maintenance Manual

4.3 PC Card 4 Replacement Procedures

Removing a PC Card

To remove a PC Card, follow the steps below.

1. Push the for the card you want to release. The button will pop out when you release it.

Fig 4-2: Pressing the eject button

Satellite P20-25 Series Maintenance Manual 4-9

4 Replacement Procedures

2. Push the once more to pop the PC Card out slightly.

3. Grasp the and remove it.

4.3 PC Card

4-10

Fig 4-3: Removing the PC Card

4. Push the back into place, if necessary.

Satellite P20-25 Series Maintenance Manual

4.3 PC Card 4 Replacement Procedures

Installing the PC Card

To install the PC Card, follow the steps below and refer to the figures in the preceding section.

1. Make sure the two eject buttons do not stick out.

2. Insert the and press gently to ensure a firm connection.

Satellite P20-25 Series Maintenance Manual 4-11

4 Replacement Procedures 4.4 Removable modules

The Satellite P20 features two bays for the insertion of removable modules. The main module bay may house an optical drive, a second HDD or an FDD. The 2nd module bay is generally used for the removable battery, but it may also be used with a second Optical

Media Drive or a TV tuner module.

This section covers removal and installation of devices from the main module bay. For removal and installation of devices from the 2 nd module bay, refer to Section 4.2, Battery .

Disassembly and assembly procedures for the optical drive, TV tuner, removable HDD and FDD are given in later sections.

4-12 Satellite P20-25 Series Maintenance Manual

4.4 Removable modules 4 Replacement Procedures

Removing the Main Module

To remove the main module, follow the steps below:

1. Turn the computer upside down. the module bay lock . the module bay latch to release it then pull the main module out from the bay.

Fig 4-4: Removing the main module

Satellite P20-25 Series Maintenance Manual 4-13

4 Replacement Procedures 4.4 Removable modules

Installing the Main Module

To install a device in the main module bay, follow the steps below and refer to the figure in the preceding section.

1. Slide the device into the main module bay . The main module bay latch will click automatically and secure the device in position.

2. Engage the latch lock .

4-14 Satellite P20-25 Series Maintenance Manual

4.5 Optical Drive 4 Replacement Procedures

The Satellite P20 may be fitted with a: DVD-R/-RW device

DVD-ROM device

DVD Multi-drive device

Combo device

Disassembling the Optical Drive

To disassemble the optical drive, first remove the drive from its module bay, then follow the steps below.

1. Remove × 8 screws and one silver M2 × 4 screw securing the back bracket plate . Lift off the back bracket plate .

2. Remove × 4 screws (two from each side of the drive) securing the main bracket . Lift off the main bracket .

Fig 4-5: Removing the bracket screws

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4 Replacement Procedures

3. Pull the from the rear of the drive.

4.5 Optical Drive

4-16 Satellite P20-25 Series Maintenance Manual

4.5 Optical Drive 4 Replacement Procedures

Reassembling the Optical Drive

To reassemble an optical drive, follow the steps below and refer to the figure in the preceding section.

1. Fit the to the rear panel of the optical drive .

2. Place the drive in the main bracket and secure with four silver M2 × 4 screws (two from each side of the drive).

3. Position the back bracket plate and secure with three black M2 × 8 screws and one silver M2 × 4 screw .

Satellite P20-25 Series Maintenance Manual 4-17

4 Replacement Procedures 4.6 TV Tuner

Disassembling the TV Tuner

To disassemble the TV tuner, first remove the tuner from its module bay, then follow the steps below.

1. Remove × 8 screws securing the TV tuner case .

2. Lift the lid off the TV tuner case and lift out the TV tuner board (if appropriate, detach the TV tuner transfer assembly FPC ).

4-18

Fig 4-6: Removing the TV tuner case screws

Satellite P20-25 Series Maintenance Manual

4.6 TV Tuner 4 Replacement Procedures

Reassembling the TV Tuner

To reassemble a TV tuner, follow the steps below and refer to the figure in the preceding section.

1. Position the in the TV tuner case and, if appropriate, attach the TV tuner transfer assembly FPC .

2. Secure the lid of the TV tuner case with seven M2 × 8 screws .

Satellite P20-25 Series Maintenance Manual 4-19

4 Replacement Procedures 4.7 Removable HDD

Disassembling the Removable HDD

To disassemble the removable HDD, first remove the drive from its module bay, then follow the steps below.

1. Release the of the removable HDD container and open the HDD container lid.

2. Ease the out of the container.

4-20

Fig 4-7: Opening the removable HDD container

Satellite P20-25 Series Maintenance Manual

4.7 Removable HDD 4 Replacement Procedures

CAUTION : When handling the HDD, do not press the top surface as shown by the arrow. Hold it by the sides.

3. Remove the × 3 screws that secure the HDD case to the HDD .

4. Lift off the HDD case .

Fig 4-8: Removing the HDD case screws

Satellite P20-25 Series Maintenance Manual 4-21

4 Replacement Procedures

5. Grasp the and peel off the aluminum HDD shielding .

6. Gently pull the HDD connector off the HDD .

4.7 Removable HDD

4-22 Satellite P20-25 Series Maintenance Manual

4.7 Removable HDD 4 Replacement Procedures

Reassembling the Removable HDD

To reassemble the removable HDD, follow the steps below and refer to the figure in the preceding section.

1. Attach the to the HDD .

2. Wrap the in the aluminum HDD shielding ensuring that the circuit board face of the drive is covered by the black part of the shielding. The circuit board must not come into contact with the silver portion of the shielding.

3. Seat the in the HDD case and secure with four M3 × 3 screws .

4. Slide the into the HDD container .

5. Close the and lock it with the latch.

Satellite P20-25 Series Maintenance Manual 4-23

4 Replacement Procedures 4.8 Removable FDD

Disassembling the Removable FDD

To disassemble the removable FDD, first remove the drive from its module bay, then follow the steps below.

1. Remove × 4 screws from each side of the drive and three M2.5

× 4 screws securing the rear panel.

2. Lift off the FDD bracket .

4-24

Fig 4-9: Removing the FDD bracket screws

3. Release the and remove.

Satellite P20-25 Series Maintenance Manual

4.8 Removable FDD 4 Replacement Procedures

Reassembling the Removable FDD

To reassemble a FDD, follow the steps below and refer to the figure in the preceding section.

1. Attach the .

2. Place the in the FDD bracket and secure with two M2.5

× 4 screws on each side of the drive and three M2.5x4 screws on the rear panel.

Satellite P20-25 Series Maintenance Manual 4-25

4 Replacement Procedures

4.9 Wireless LAN Unit

4.9 Wireless LAN Unit

Removing the Wireless LAN Unit

To remove the wireless LAN unit , first remove the battery pack then follow the steps below.

1. Turn the computer upside down and loosen two embedded screws securing the wireless LAN compartment cover .

2. Lift off the wireless LAN compartment cover .

Fig 4-10: Removing the wireless LAN compartment cover

4-26 Satellite P20-25 Series Maintenance Manual

4.9 Wireless LAN Unit 4 Replacement Procedures

3. Detach the two ends of the wireless LAN antenna .

4. Gently press out on the latches . One end of the wireless LAN unit will pop up.

5. Grasp the and pull it out.

Fig 4-11: Removing the wireless LAN unit

CAUTION : Do not touch the connectors on the wireless LAN unit or on the computer. Debris on the connectors may cause malfunction.

Satellite P20-25 Series Maintenance Manual 4-27

4 Replacement Procedures 4.9 Wireless LAN Unit

Installing the Wireless LAN Unit

To install the wireless LAN unit, follow the steps below and refer to the figures in the preceding section.

1. Turn the computer upside down and loosen two embedded screws securing the wireless LAN compartment cover .

2. Lift off the wireless LAN compartment cover .

3. Fit the connectors into the computer’s connectors and press carefully to ensure firm contact.

CAUTION : Do not touch the connectors on the wireless LAN unit or on the computer. Debris on the connectors may cause malfunction.

4. Gently, push the wireless LAN unit down until the latches engage the unit to hold it in place.

5. Attach the ends of the wireless LAN antenna . The black antenna cable should be attached to the connector nearer the rear side of the computer, the white antenna cable to the connector closer to the front panel.

6. Seat the and secure it with the two embedded screws .

4-28 Satellite P20-25 Series Maintenance Manual

4.10 Expansion Memory 4 Replacement Procedures

4.10 Expansion Memory

Removing the Expansion Memory

To remove the expansion memory, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down.

2. Remove securing the expansion memory cover .

3. Lift off the expansion memory cover .

Fig 4-12: Removing the expansion memory cover

Satellite P20-25 Series Maintenance Manual 4-29

4 Replacement Procedures 4.10 Expansion Memory

4. Gently press out on the latches . One end of the expansion memory will pop up.

5. Grasp the and pull it out.

Fig 4-13: Removing the expansion memory

CAUTION : Do not touch the connectors on the expansion memory or on the computer. Debris on the connectors may cause memory access problems.

4-30 Satellite P20-25 Series Maintenance Manual

4.10 Expansion Memory 4 Replacement Procedures

Installing the Expansion Memory

To install the expansion memory, follow the steps below and refer to the figures in the preceding section.

1. Turn the computer upside down.

2. Remove the securing the expansion memory cover .

3. Lift off the expansion memory cover .

4. Fit the ’s connectors into the computer’s connectors and press carefully to ensure firm contact.

CAUTION : Do not touch the connectors on the expansion memory or on the computer.

Debris on the connectors may cause memory access problems.

5. Gently, push the expansion memory down until latches on either side engage the expansion memory to hold it in place.

6. Seat the in place and secure it with two embedded screws .

Satellite P20-25 Series Maintenance Manual 4-31

4 Replacement Procedures 4.11 Modem / Bluetooth Unit

4.11 Modem / Bluetooth Unit

Optional modem and Bluetooth units occupy the same connector so only one can be fitted at a time. The removal and installation procedures are the same for both.

Removing the Modem / Bluetooth Unit

To remove the installed modem or Bluetooth unit, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down.

2. Remove securing the modem / Bluetooth unit cover .

3. Lift off the modem / Bluetooth unit cover .

4-32

Fig 4-14: Removing the modem / Bluetooth unit cover

Satellite P20-25 Series Maintenance Manual

4.11 Modem / Bluetooth Unit 4 Replacement Procedures

4. Remove two M2.5

× 3 screws securing the modem / Bluetooth unit .

Fig 4-15: Removing the modem / Bluetooth unit screws

5. Carefully lift the unit off its connector.

6. If a is being removed, disconnect its power cable from the system board .

If a Bluetooth unit is being removed, disconnect its FPC cable from the system board .

Satellite P20-25 Series Maintenance Manual 4-33

4 Replacement Procedures 4.11 Modem / Bluetooth Unit

Installing the Modem / Bluetooth Unit

To install a modem or Bluetooth unit, follow the steps below and refer to the figures in the preceding section.

1. Turn the computer upside down.

2. Remove securing the modem / Bluetooth unit cover .

3. Lift off the modem / Bluetooth unit cover .

4. If a is being fitted, connect the power cable .

If a Bluetooth unit is being fitted, connect the FPC cable .

5. Fit the onto its connector and secure with two M2.5

× 3 screws .

6. Replace the and secure with two embedded screws .

4-34 Satellite P20-25 Series Maintenance Manual

4.12 CPU 4 Replacement Procedures

4.12 CPU

Removing the CPU

To remove the CPU, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down and remove five embedded security screws securing the CPU compartment cover . Remove the CPU compartment cover .

Fig 4-16: Removing the CPU compartment cover

Satellite P20-25 Series Maintenance Manual 4-35

4 Replacement Procedures 4.12 CPU

2. Remove securing the heat sink .

3. Lift off the heat sink . In the event that the heat sink is stuck to the CPU, insert a small flathead screwdriver into the hole on the heat sink to gently lever it off).

Fig 4-17: Removing the heat sink

CAUTION: If you remove the heat sink, you should use the CPU grease tool to remove the grease on the CPU and heat sink. Reapply fresh grease before replacing the heat sink.

4-36 Satellite P20-25 Series Maintenance Manual

4.12 CPU 4 Replacement Procedures

4. Turn the on the CPU socket with a flat-blade screwdriver so that the notch on the cam is aligned with the open side of the CPU socket to unlock the CPU .

5. Gently lift out the CPU .

Fig 4-18: Removing the CPU

Satellite P20-25 Series Maintenance Manual 4-37

4 Replacement Procedures 4.12 CPU

Installing the CPU

To install the CPU, follow the steps below and refer to the figures in the preceding section.

CAUTION: If you remove the heat sink, you should use the CPU grease tool to remove the grease on the CPU and heat sink. Reapply fresh grease before installing the heat sink.

1. Make sure that the notch on the cam is aligned with the open position.

2. Seat the to align the triangle mark on the CPU with the one on the CPU socket .

Make sure the alignment is exact to avoid damaging pins on the CPU .

3. Press the softly with your fingers and turn the cam on the CPU socket to the closed position with a flat-blade screwdriver to secure the CPU .

4. Seat the heat sink over the CPU and secure with four screws in the order indicated on the heat sink (1,2,3,4).

5. Secure the CPU compartment cover with the five embedded security screws .

4-38 Satellite P20-25 Series Maintenance Manual

4.13 HDD

4.13 HDD

4 Replacement Procedures

CAUTION : When handling the HDD, do not press the top surface as shown by the arrow. Hold it by the sides.

Satellite P20-25 Series Maintenance Manual 4-39

4 Replacement Procedures 4.13 HDD

Removing the HDD

To remove the HDD, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down.

2. Remove × 4 black screws securing the HDD and lift out the HDD unit .

Fig 4-19: Removing the HDD unit cover screws

NOTE: It is not necessary to remove the HDD case unless you are going to replace the

HDD.

4-40 Satellite P20-25 Series Maintenance Manual

4.13 HDD 4 Replacement Procedures

3. Remove the × 3 screws that secure the HDD case to the HDD .

Fig 4-20: Removing the HDD unit case screws

4. Lift off the HDD case .

5. Grasp the at the side and peel off the aluminum HDD shielding .

6. Gently pull the HDD connector off the HDD .

Fig 4-21: Removing the aluminum HDD shielding and connector

Satellite P20-25 Series Maintenance Manual 4-41

4 Replacement Procedures 4.13 HDD

Installing the HDD

To install the HDD, follow the steps below and refer to the figures in the preceding section.

1. Slide the firmly into place on the HDD , being careful not to damage the connector pins.

2. Wrap the in the HDD shielding ensuring that the circuit board face of the drive is covered by the black part of the shielding. The circuit board must not come into contact with the silver portion.

.

3. Seat the in the HDD case and secure with four M3 × 3 screws .

4. Seat the unit in the HDD slot and secure it with two M2.5

× 4 black screws .

4-42 Satellite P20-25 Series Maintenance Manual

4.14 Keyboard 4 Replacement Procedures

4.14 Keyboard

Removing the Keyboard

To remove the keyboard, first remove the battery pack, then follow the steps below.

1. Open the .

2. Insert a thin tool into each of the narrow holes in the strip cover and lever the strip cover up to release its latches.

Fig 4-22: Removing the strip cover

Satellite P20-25 Series Maintenance Manual 4-43

4 Replacement Procedures 4.14 Keyboard

3. Remove × 3 silver screws securing the keyboard .

4. Lift the out and place over the display hinges, revealing the keyboard cable.

5. Disconnect the and remove the keyboard .

4-44

Fig 4-23: Removing keyboard cable and keyboard

Satellite P20 Series Maintenance Manual

4.14 Keyboard 4 Replacement Procedures

Installing the Keyboard

To install the keyboard, follow the steps below and refer to the figures in the preceding section.

1. Connect the to the system board.

2. Set the keyboard in place and secure it with two M2.5

× 3 silver screws .

3. Seat the and press down to ensure the strip cover latches engage, locking it in place.

Satellite P20-25 Series Maintenance Manual 4-45

4.15 TOP Cover 4 Replacement Procedures

4.15 Top Cover

Removing the Top Cover

To remove the top cover, first remove the battery pack, then follow the steps below.

1. Remove the , HDD and main module .

2. Remove seven M2.5

× 6 screws from the keyboard tray securing the top cover .

3. Detach the following three cables:

• LED / power button board FPC

Function key board FPC

FPC

Fig 4-24: Removing the top cover screws and cables

Satellite P20-25 Series Maintenance Manual 4-45

4 Replacement Procedures 4.15 TOP Cover

4. Turn the computer upside down and remove the following sixteen screws :

• Three

• Two

× 3 silver screws

M2.5

Five

M2.5

×

×

×

4 black screws

6 black screws

14 black screws

4-46

Fig 4-25: Removing the screws from the computer underside

5. Turn the computer upright, open the display cover and lift off the top cover .

Satellite P20-25 Series Maintenance Manual

4.15 TOP Cover 4 Replacement Procedures

Installing the Top Cover

To install the top cover, follow the steps below and refer to the figures in the preceding section.

1. Seat the and secure the following three cables:

• LED / power button board FPC

Function key board FPC

FPC

2. Secure the top cover with seven M2.5

× 6 screws .

3. Turn the computer upside down and secure the following sixteen screws :

• Three

• Two

× 3 silver screws

M2.5

Five

M2.5

×

×

×

4 black screws

6 black screws

14 black screws

Satellite P20-25 Series Maintenance Manual 4-47

4 Replacement Procedures 4.16 Function Key Board

4.16 Function Key Board

Removing the Function Key Board

To remove the Function Key Board, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module and top cover .

2. Place the face down.

3. Remove two M2.5

× 3 silver screws securing the function key board . Remove function key board .

4-48

Fig 4-26: Removing the function key board

Satellite P20-25 Series Maintenance Manual

4.16 Function Key Board 4 Replacement Procedures

Installing the Function Key Board

To install the Function Key Board, follow the steps below and refer to the figure in the preceding section.

1. Feed the function key board FPC through the top cover.

2. Position the and secure with two M2.5

× 3 silver screws .

Satellite P20-25 Series Maintenance Manual 4-49

4 Replacement Procedures 4.17 LED / Power Button Board

4.17 LED / Power Button Board

Removing the LED / Power Button Board

To remove the LED / Power Button Board, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module and top cover .

2. Place the face down.

3. Remove four M2.5

× 3 silver screws securing the LED / power button board .

Remove LED / power button board .

4-50

Fig 4-27: Removing the LED/power button board

Satellite P20-25 Series Maintenance Manual

4.17 LED / Power Button Board 4 Replacement Procedures

Installing the LED / Power Button Board

To install the LED / Power Button Board, follow the steps below and refer to the figure in the preceding section.

1. Feed the through the top cover.

2. Position the and secure with four M2.5

× 3 silver screws .

Satellite P20-25 Series Maintenance Manual 4-51

4 Replacement Procedures 4.18 TouchPad

4.18 TouchPad

Removing the TouchPad

To remove the TouchPad, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module and top cover .

2. Place the face down.

3. Disconnect the from both the TouchPad button board and the TouchPad .

4. Remove × 3 silver screws securing the TouchPad cover .

5. Lift out the TouchPad cover followed by the TouchPad .

6. If you need to replace the TouchPad button board , remove two M2.5

× 3 silver screws securing it, then lift it out.

4-52

Fig 4-28: Removing the TouchPad button board

Satellite P20-25 Series Maintenance Manual

4.18 TouchPad 4 Replacement Procedures

Installing the TouchPad

To install the TouchPad, follow the steps below and refer to the figure in the preceding section.

1. With the top cover upside down, place the TouchPad and TouchPad Button Board in position. Secure the TouchPad Button Board with two M2.5

× 3 silver screws .

2. Position the and secure with five M2.5

× 3 silver screws .

3. Connect the to both the TouchPad button board and the TouchPad .

Satellite P20-25 Series Maintenance Manual 4-53

4 Replacement Procedures 4.19 Display Assembly

4.19 Display Assembly

Removing the Display Assembly

To remove the display assembly, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down and loosen two embedded screws securing the wireless LAN compartment cover .

2. Lift off the wireless LAN compartment cover .

4-54

Fig 4-29: Removing the wireless LAN compartment cover

3. Detach the two ends of the wireless LAN antenna .

4. Remove the , HDD , main module and top cover .

5. Feed the through the system board .

Satellite P20-25 Series Maintenance Manual

4.19 Display Assembly 4 Replacement Procedures

6. Remove × 4 screws from the rear of the hinges and two M2.5

× 6 screws from the I/O cover .

Fig 4-30: Removing the wireless LAN compartment cover

7. Remove × 12 screw securing the left end of the hinge cover and one m2.5

× 3 silver screw securing the right end.

8. Lift off the hinge cover .

Fig 4-31: Removing the hinge cover

Satellite P20-25 Series Maintenance Manual 4-55

4 Replacement Procedures 4.19 Display Assembly

9. Remove × 6 screws from the hinges and release the display cable .

10. Pull on the attached handle to detach the display cable from the system board .

11. Lift the display assembly off the computer chassis.

4-56 Satellite P20-25 Series Maintenance Manual

4.19 Display Assembly 4 Replacement Procedures

Installing the Display Assembly

To install the display assembly, follow the steps below and refer to the figures in the preceding section.

1. Seat the display assembly taking care not to crush to the LCD display cable or wireless LAN antenna .

2. Feed the through the system board into the wireless LAN compartment .

3. If a is installed, remove the wireless LAN compartment cover and attach the ends of the wireless LAN antenna to the card. The black antenna cable should be attached to the connector nearer the rear side of the computer, the white antenna cable to the connector closer to the front panel.

4. Secure the hinges with two M2.5

× 6 screws . Use the same screw to secure the display cable to the left side hinge.

5. Attach the to its connector on the system board .

6. Seat the and secure its top-side with one m2.5

× 12 screw at the left end and one m2.5

× 3 silver screw at the right end.

7. Secure the with one M2 × 4 screw at the rear of the each hinge.

8. Secure the display assembly with two M2.5

× 6 screws on the I/O cover .

Satellite P20-25 Series Maintenance Manual 4-57

4 Replacement Procedures 4.20 System Board

4.20 System Board

Removing the System Board

To remove the system board, first remove the battery pack, then follow the steps below.

1. Turn the computer upside down and remove five embedded security screws securing the CPU compartment cover . Remove the CPU compartment cover .

Fig 4-32: Removing the CPU compartment cover

2. Disconnect the .

4-58

Fig 4-33: Removing the fan cables

Satellite P20 Series Maintenance Manual

4.20 System Board 4 Replacement Procedures

3. Remove the , HDD , main module, CPU, modem or Bluetooth unit , expansion memory cards , wireless LAN cards , PC card(s), top cover and display assembly .

4. Remove × 4 screws securing the low I/O cover (five from the top, two from the rear, and two from the base).

5. Remove the .

Fig 4-34: Removing the hexagonal port screws

6. Remove the .

Satellite P20 Series Maintenance Manual 4-59

4 Replacement Procedures 4.20 System Board

7. Remove the × 6 screws securing the system board to the computer chassis.

8. Detach the following five cables from the system board:

• Right-side speaker cable

Direct play LED FPC cable

CIR FFC cable

Direct play button FFC

Audio board FFC cable

4-60

Fig 4-35: Removing the system board screws and cables

Satellite P20 Series Maintenance Manual

4.20 System Board 4 Replacement Procedures

Installing the System Board

To install the system board, follow the steps below and refer to the figures in the preceding section.

1. Seat the and secure with three M2.5

× 6 screws .

2. Secure the following five cables to the system board:

Right-side speaker cable

Direct play LED FPC cable

CIR FFC cable

Direct play button FFC

Audio board FFC cable

3. Position the .

4. Secure the parallel port and external monitor port with two hexagonal port screws each.

5. Secure the with nine M2.5

× 4 screws (five to the top, two to the rear, and two to the base).

6. Replace the other removed FRUs - keyboard , HDD , main module, CPU, modem or

Bluetooth unit , expansion memory cards , wireless LAN cards , PC card(s) and top cover - remembering to reattach the three fan cables.

Satellite P20 Series Maintenance Manual 4-61

4 Replacement Procedures 4.21 Direct Play Button Board

4.21 Direct Play Button Board

Removing the Direct Play Button Board

To remove the direct play button board, first remove the battery pack, then follow the steps below. the , HDD , main module and top cover . the from the system board .

3. Remove × 6 screws securing the direct play cover assembly . the forward through the front panel.

4-62

Fig 4-36: Removing the Direct Play cover assembly

5. Remove × 3 screw securing the direct play button board .

6. Remove two M2 × 3 screws securing the button board to the bracket . Lift off the button board .

Satellite P20 Series Maintenance Manual

4.21 Direct Play Button Board 4 Replacement Procedures

Installing the Direct Play Button Board

To install the direct play button board, follow the steps below and refer to the figure in the preceding section. the to the bracket with two M2 × 3 screws .

2. Secure the combined unit to the direct play cover assembly with one M2 × 3 screw . the and secure with two M2.5

× 6 screws . the to the system board .

Satellite P20 Series Maintenance Manual 4-63

4 Replacement Procedures 4.22 CIR Board

4.22 CIR Board

Removing the CIR Board

To remove the CIR board, first remove the battery pack, then follow the steps below. the , HDD , main module and top cover . the and direct play button FFC from the system board .

3. Remove × 6 screws securing the direct play cover assembly . the forward through the front panel.

5. Remove × 6 screw securing the CIR board . Lift out the CIR board .

4-64

Fig 4-37: Removing the CIR board

Satellite P20 Series Maintenance Manual

4.22 CIR Board 4 Replacement Procedures

Installing the CIR Board

To install the CIR board, follow the steps below and refer to the figure in the preceding section. the and secure with one M2.5

× 6 screw . the and secure with two M2.5

× 6 screws . the and direct play button FFC to the system board .

Satellite P20 Series Maintenance Manual 4-65

4 Replacement Procedures Direct play LED board

4.23 Direct play LED board

Removing the Direct Play LED Board

To remove the direct play LED board, first remove the battery pack, then follow the steps below. the , HDD , main module and top cover . the from the system board . the off the chassis and lift out.

4-66

Fig 4-38: Removing the direct play LED board

Satellite P20 Series Maintenance Manual

4.23 Direct play LED board 4 Replacement Procedures

Installing the Direct Play LED Board

To install the direct play LED board, follow the steps below and refer to the figure in the preceding section.

1. Stick the to the tape on the chassis.

2. Secure the to the system board .

Satellite P20 Series Maintenance Manual 4-67

4 Replacement Procedures 4.24 Audio Board

4.24 Audio Board

Removing the Audio Board

To remove the audio board, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module and top cover .

2. Detach the left-side speaker cable and audio board FFC cable from the audio board .

3. Remove × 6 screws securing the audio board.

4-68

Fig 4-39: Removing the audio board screws

Satellite P20 Series Maintenance Manual

4.24 Audio Board 4 Replacement Procedures

Installing the Audio Board

To install the audio board, follow the steps below and refer to the figure in the preceding section.

1. Seat the and secure with two M2.5

× 6 screws .

2. Attach the left-side speaker cable and audio board FFC cable .

Satellite P20 Series Maintenance Manual 4-69

4 Replacement Procedures 4.25 Speakers

4.25 Speakers

Removing the Speakers

To remove the speakers, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module and top cover .

2. Turn the computer upside down and remove one M2.5

× 4 screw securing each speaker .

4-70

Fig 4-40: Removing the speaker screws

Satellite P20 Series Maintenance Manual

4.25 Speakers 4 Replacement Procedures

3. Place the chassis upright. Detach the left-side speaker cable from the audio board and the right-side speaker cable from the system board .

4. Remove × 4 screws securing each speaker .

5. Lift out each speaker .

Fig 4-41: Removing the speakers

Satellite P20 Series Maintenance Manual 4-71

4 Replacement Procedures 4.25 Speakers

Installing the Speakers

To install the speakers, follow the steps below and refer to the figure in the preceding section.

1. Seat each . The speaker cases are marked with L (left) and R (right).

2. Secure each speaker with two M2.5

× 4 screws .

3. Attach the left-side speaker cable to the audio board and the right-side speaker cable to the system board .

4. Turn the computer upside down and secure each speaker with one M2.5

× 4 screw .

4-72 Satellite P20 Series Maintenance Manual

4.26 Fan Set 4 Replacement Procedures

4.26 Fan Set

Removing the Fan Set

To remove the fan set, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , main module, CPU, modem or Bluetooth unit , expansion memory cards , wireless LAN cards , PC card(s) , top cover and system board .

2. Remove × 4 screws and one M2.5

× 3 screw securing the fan set from inside the chassis.

Fig 4-42: Removing the inner chassis fan screws

Satellite P20 Series Maintenance Manual 4-73

4 Replacement Procedures 4.26 Fan Set

3. Turn the computer over and remove seven M2.5

× 4 screws securing the fan set from the base.

Fig 4-43: Removing the outer chassis fan screws

4. Lift out the fan set .

4-74 Satellite P20 Series Maintenance Manual

4.26 Fan Set 4 Replacement Procedures

Installing the Fan Set

To install the fan set, follow the steps below and refer to the figure in the preceding section.

1. Seat the and secure from inside the chassis with five M2.5

× 4 screws and one

M2.5

× 3 screw .

2. Turn the computer over and secure the fan set with seven M2.5

× 4 screws from the base.

Satellite P20 Series Maintenance Manual 4-75

4 Replacement Procedures 4.27 Display Mask

4.27 Display Mask

Removing the Display Mask

To remove the display mask, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , keyboard , top cover and display assembly .

2. Remove six mask seals to expose six screws securing the display mask .

3. Remove × 3 screws from the top of display assembly and another four

M2.5

× 6 screws that were covered by the mask seals .

4-76

Fig 4-44: Removing the display mask screws

Satellite P20-25 Series Maintenance Manual

4.27 Display Mask 4 Replacement Procedures

3. A total of 18 snaps secure the display mask . Carefully insert your fingers between the mask and the LCD panel and pry open the snaps . Start with the four snaps at the top of the display mask . Continue unsnapping the display mask along the two sides ( five snaps on each side), and the bottom edge ( four snaps ).

Installing the Display Mask

To install the display mask, follow the steps below and refer to the figures in the preceding section.

1. Seat the and secure the snaps on each side.

2. Secure the with two M2 × 3 screws at the top of display assembly and another four M2.5

× 6 screws nearer the base.

3. Cover the six secured screws with mask seals .

Satellite P20-25 Series Maintenance Manual 4-77

4 Replacement Procedures 4.28 FL Inverter Board

4.28 FL Inverter Board

Removing the FL Inverter Board

To remove the FL inverter board, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , keyboard , top cover , display assembly and display mask .

2. Remove securing the LCD cable .

3. Remove securing the FL inverter board .

4. Lift up the FL inverter board and detach the FL cable and HV cable . Remove the

FL inverter board .

4-78

Fig 4-45: Removing the FL inverter board

Satellite P20-25 Series Maintenance Manual

4.28 FL Inverter Board 4 Replacement Procedures

Installing the FL Inverter Board

To install the FL inverter board, follow the steps below and refer to the figure in the preceding section..

1. Connect the and HV cable to the FL inverter board .

2. Seat the and secure it with t one M2x3 screw .

3. Secure the with one M2x3 screw .

4. Install the , display assembly , top cover , keyboard , HDD , main module and battery pack .

Satellite P20-25 Series Maintenance Manual 4-79

4 Replacement Procedures 4.29 LCD Module

4.29 LCD Module

Removing the LCD Module

To remove the LCD module, first remove the battery pack, then follow the steps below.

1. Remove the , HDD , keyboard , top cover , display assembly , display mask and FL inverter board .

2. Remove × 6 screws securing the LCD module .

3. Lift the out of the LCD cover .

4-80

Fig 4-46: Removing the LCD module

Satellite P20-25 Series Maintenance Manual

4.28 FL Inverter Board 4 Replacement Procedures

4. Remove × 3 screws securing the LCD bracket (the number of bracket screws may vary on different models).

5. Remove the LCD bracket .

6. Peel away the Kapton film securing the LCD cable .

7. Pull out from LCD connector .

Fig 4-47: Removing the LCD cable

NOTE : If the LCD module malfunctions, remove the LCD cable and LCD bracket. Then replace the whole LCD module unit.

Satellite P20-25 Series Maintenance Manual 4-81

4 Replacement Procedures 4.29 LCD Module

Installing the LCD Module

To install the LCD module, follow the steps below and refer to the figures in the preceding section.

1. Connect the to the LCD connector on the back of the LCD module .

2. Secure the with Kapton film .

3. Secure the to the LCD module with eight M2 × 3 screws (the number of bracket screws may vary on different models).

4. Position the in place.

5. Secure the with six M2.5

× 6 screws . First secure the screws (one on each side) nearer the base of the module, then secure the screws nearer the top.

6. Secure with one M2.5

× 4 screw .

4-82 Satellite P20-25 Series Maintenance Manual

Appendices

Appendices

App-ii SatelliteP20-25 Series Maintenance Manual

Appendix Contents

Appendix A Handling the LCD Module......................................................................... A-1

Appendix B Board Layout................................................................................................B-1

B.1 System Board (FRDSY*) Bottom View ...................................................................B-1

B.2 System Board (FRDSY*) Top View ........................................................................B-2

Appendix C Pin Assignments .......................................................................................... C-1

C.1 JP24/JP26 SODIMM I/F (144-pin)............................................................................C-1

C.2 JP1 LCD I/F (40-pin).................................................................................................C-5

C.3 JP15 RGB I/F (15-pin)...............................................................................................C-6

C.4 JP34 HDD I/F (44-pin) ..............................................................................................C-7

C.5 JP28 Main Module I/F (60-pin) .................................................................................C-8

C.6 JP29 Second Module I/F (60-pin)..............................................................................C-9

C.7 JP14 Parallel I/F (25-pin).........................................................................................C-10

C.8 JP21 PC Card I/F (150-pin) .....................................................................................C-11

C.9 JP27 Mini PCI I/F (124-pin)....................................................................................C-14

C.10 JP22, JP23, JP25 Fan I/F (3-pin) ............................................................................C-16

C.11 AC Adaptor Connector (3-pin)---Find Power Team ..............................................C-16

C.13 Headphone Connector (6-pin) .................................................................................C-17

Appendix D Keyboard Scan/Character Codes .............................................................. D-1

Appendix E Key Layout ...................................................................................................E-1

E.1 United States (US) Keyboard ....................................................................................E-1

E.2 United Kingdom (UK) Keyboard ..............................................................................E-1

E.3 Spanish (SP) Keyboard..............................................................................................E-2

E.5 Korean (KO) Keyboard .............................................................................................E-3

Appendix F Series Screw Torque List ............................................................................F-1

Appendix G Reliability..................................................................................................... G-1

SatelliteP20-25 Series Maintenance Manual App-iii

Appendices

Figures

Figure B.1 System Board (FRDSY*) Bottom View........................................................B-1

Figure B.2 System Board (FRDSY*) Top View .............................................................B-2

App-iv SatelliteP20-25 Series Maintenance Manual

Tables

Table B-1 System board ICs and connectors (top and bottom)............................................B-3

Table B-2 System board ICs and connectors (top and bottom)............................................B-4

Table C-1 SODIMM I/F pin assignments (144-pin).......................................................C-1

Table C-2 LCD I/F pin assignments (40-pin) .................................................................C-5

Table C-3 RGB I/F pin assignments (15-pin)................................................................C-6

Table C-4 HDD I/F pin assignments (44-pin) ...............................................................C-7

Table C-5 CD-ROM I/F pin assignments (50-pin) ........................................................C-8

Table C-6 Parallel I/F pin assignments (25-pin)..........................................................C-10

Table C-7 PC Card I/F pin assignments (154-pin) ......................................................C-11

Table C-8 Mini PCI I/F pin assignments (124-pin) .....................................................C-14

Table C-9-1 JP22 Fan I/F pin assignments (3-pin) ..........................................................C-16

Table C-9-2 JP23 Fan I/F pin assignments (3-pin) .........................................................C-16

Table C-9-3 JP25 Fan I/F pin assignments (4-pin) .........................................................C-16

Table C-10 AC Adaptor Connector pin assignments (3-pin) .........................................C-16

Table C-11 Microphone I/F pin assignments (6-pin) .....................................................C-16

Table C-12 Headphone Connector pin assignments (6-pin)..........................................C-17

Table D-1 Scan codes (set 1 and set 2) (1/4) ................................................................. D-1

Table D-2 Scan codes with left Shift key....................................................................... D-5

Table D-3 Scan codes in Numlock mode....................................................................... D-6

Table D-4 Scan codes with Fn key ................................................................................ D-6

Table D-5 Scan codes in overlay mode.......................................................................... D-7

Table D-6 No.124 key scan code ................................................................................... D-7

Table D-7 No.126 key scan code ................................................................................... D-8

Table F-1 Series Screw Torque List............................................................................... F-1

Table G-1 MTBF............................................................................................................ G-1

SatelliteP20-25 Series Maintenance Manual App-v

Appendices

App-vi SatelliteP20-25 Series Maintenance Manual

Appendix A

Appendix A Handling the LCD Module

Precautions for handling the LCD module

The LCD module can be easily damaged during assembly or disassembly. Therefore, please observe the following precautions when handling it:

1. When installing the LCD module in the LCD cover, be sure to seat it so that it is properly aligned and maximum visibility of the display is maintained.

2. Be careful to align the holes at the four corners of the LCD module with the corresponding holes in the LCD cover before securing the module with screws.

Do not force the module into place, because stress can affect its performance.

Note: The panel’s polarized surface is easily scarred, so handle it carefully.

Satellite P20-25 Series Maintenance Manual A-1

A-2

3. If the panel’s surface gets dirty, wipe it with cotton or a soft cloth. If it is still dirty, try breathing on the surface to create a light condensate and wipe it again.

If the surface is very dirty, we recommend a CRT cleaning agent. Apply the agent to a cloth and then wipe the panel’s surface. Do not apply cleanser directly to the panel.

CRT

Cleaner

4. If water or other liquid is left on the panel’s surface for a long period, it can change the screen’s tint or stain it. Be sure to quickly wipe off any liquid.

Satellite P20-25 Series Maintenance Manual

5. Glass is used in the panel, so be careful not to drop it or let it strike a hard object, which could cause breakage or cracks.

6. CMOS-LSI circuits are used in the module, so guard against damage from electrostatic discharge. Be sure to wear a wrist or ankle ground when handling the module.

Satellite P20-25 Series Maintenance Manual A-3

7. Do not expose the module to direct sunlight or strong ultraviolet rays for long periods.

A-4

8. Do not store the module at temperatures below specifications. Cold can cause the liquid crystals to freeze, lose their elasticity or otherwise suffer damage.

9. Do not disassemble the LCD module. Disassembly can cause malfunctions.

Satellite P20-25 Series Maintenance Manual

10. If you transport the module, do not use packing material that contains epoxy resin

(amine) or silicon glue (alcohol or oxime). These materials can release gas that can damage the panel’s polarization.

Satellite P20-25 Series Maintenance Manual A-5

A-6 Satellite P20-25 Series Maintenance Manual

Appendix B Board Layout

B.1 System Board (FRDSY*) Bottom View

Figure B-1 System board (FRDSY*) layout (Bottom)

Satellite P20-25 Series Maintenance Manual B-1

B.2 System Board (FRDSY*) Top View

B-2

Figure B-2 System board (FRDSY*) layout (Top)

Satellite P20-25 Series Maintenance Manual

(L)

(M)

(N)

(Q)

Table B-1 System board ICs and connectors (top and bottom)

Mark Number Name

(B)

(C)

(D)

(E)

(F)

(G)

(H)

U37

U49

U16

U35

LAN Controller RTL8101L

ICH5 Intel 82801

BIOS ROM 512K8-90

VGA Chip GO5200

U29,U32, U39, U40 4M32 VRAM

U58 AC97 Codec ALC202

U8 SUPER I/O LPC47N227

U5

U42

U59

U52

CARDBUS & SD Controller T7L58XB-0101

Clock Generator ICS-952623CG

Audio Amplifier Chip TPA6011

1394 Fire Wire Controller TSB43AB21A

Satellite P20-25 Series Maintenance Manual B-3

Table B-2 System board ICs and connectors (top and bottom)

Mark Number Name

(#C)

(#D)

(#E)

JP17, JP33

JP30, JP16

JP28, JP29

USB Connector

RJ11/RJ45 Connector

ODD Connector

(#J)

(#K)

(#N)

JP24, JP26

JP19

SODIMM Socket

MDC Module Connector

JP22, JP23, JP25 Fan Connector

(#T)

(#U)

(#V)

(#W)

(#X)

(#Y)

(#Z)

JP4

JP8

JP10

JP27

JP13

JP12

JP6

POWER FPC CONNECTOR

TPA FPC CONNECTOR

AUDIO FPC CONNECTOR

DIRECT/B FFC CONNECTOR

CIR/B FFC CONNECTOR

LED FPC CONNECTOR

USER KEY FPC CONNECTOR

B-4 Satellite P20-25 Series Maintenance Manual

Appendix C

Appendix C Pin Assignments

System Board

C.1 JP24/JP26 SODIMM I/F (144-pin)

Table C-1 SODIMM I/F pin assignments (144-pin) (1/4)

Pin No. Signal name

1 VREF

3 VSS

5 DQ0

7 DQ1

9 25VDD

11 DQS0

13 DQ2

15 VSS

17 DQ3

19 DQ8

21 2.5VDD

23 DQ9

25 DQS1

27 VSS

29 DQ10

31 DQ11

33 2.5VDD

35 CK0

37 CK0#

39 VSS

41 DQ16

43 DQ17

45 2.5VDD

47 DQS2

I/O Pin No. Signal Name

O 2 VREF

- 4 VSS

I/O 6 DQ4

I/O 8 DQ5

O 10 2.5VDD

I/O 12 DM0

I/O 14 DQ6

- 16 VSS

I/O 18 DQ7

I/O 20 DQ12

O 22 2.5VDD

I/O 24 DQ13

I/O 26 DM1

- 28 VSS

I/O 30 DQ14

I/O 32 DQ15

O 34 2.5VDD

O 36 2.5VDD

O 38 VSS

- 40 VSS

I/O 42 DQ20

I/O 44 DQ21

O 46 2.5VDD

I/O 48 DM2

I/O

-

I/O

I/O

O

O

-

-

I/O

I/O

O

O

O

-

I/O

I/O

O

O

I/O

-

I/O

I/O

O

I/O

O

Satellite P20-25 Series Maintenance Manual C-1

C-2

Table C-1 SODIMM I/F pin assignments (144-pin) (2/4)

Pin No. Signal name

51 VSS

53 DQ19

55 DQ24

57 2.5VDD

59 DQ25

61 DQS3

63 VSS

65 DQ26

67 DQ27

69 2.5VDD

71 CB0

73 CB1

75 VSS

77 DQS8

79 CB2

81 2.5VDD

83 CB3

85 DU

87 VSS

89 CK2

91 CK2#

93 2.5VDD

95 CKE1

97 DU/A13

99 A12

101 A9

103 VSS

105 A7

107 A5

109 A3

111 A1

113 2.5VDD

I/O Pin No. Signal Name I/O

- 52 VSS

I/O 54 DQ23

I/O 56 DQ28

O 58 2.5VDD

I/O 60 DQ29

I/O 62 DM3

- 64 VSS

I/O 66 DQ30

I/O 68 DQ31

O 70 2.5VDD

- 72 CB4

- 74 CB5

- 76 VSS

- 78 DM8

- 80 CB6

O 82 2.5VDD

-

O

- 84 CB7 -

- 86 DU/RESET# -

- 88 VSS

- 90 VSS

- 92 2.5VDD

-

-

O

O 94 2.5VDD

- 96 CKE0

- 98 DU/BA2

- 100 A11

O 102 A8

- 104 VSS

O 106 A6

O

O

-

O

O

-

O

O 108 A4

O 110 A2

O 112 A0

O 114 2.5VDD

-

I/O

I/O

O

I/O

O

-

I/O

I/O

O

-

-

-

-

O

O

O

O

Satellite P20-25 Series Maintenance Manual

Table C-1 SODIMM I/F pin assignments (144-pin) (3/4)

Pin No. Signal name

115 A10/AP

117 BA0

119 WE#

121 SO#

123 DU

125 VSS

127 DQ32

129 DQ33

131 2.5VDD

133 DQS4

135 DQ34

137 VSS

139 DQ35

141 DQ40

143 2.5VDD

145 DQ41

147 DQS5

149 VSS

151 DQ42

153 DQ43

155 2.5VDD

157 2.5VDD

159 VSS

161 VSS

163 DQ48

165 DQ49

167 2.5VDD

169 DQS6

171 DQ50

173 VSS

175 DQ51

177 DQ56

179 2.5VDD

I/O Pin No. Signal Name

O 116 BA1

O 118 RAS#

O 120 CAS#

O 122 S1#

- 124 DU

- 126 VSS

I/O 128 DQ36

I/O 130 DQ37

O 132 2.5VDD

I/O 134 DM4

I/O 136 DQ38

- 138 VSS

I/O 140 DQ39

I/O 142 DQ44

O 144 2.5VDD

I/O 146 DQ45

I/O 148 DM5

- 150 VSS

I/O 152 DQ46

I/O 154 DQ47

O 156 2.5VDD

O 158 CK1#

- 160 CK1

- 162 VSS

I/O 164 DQ52

I/O 166 DQ53

O 168 2.5VDD

I/O 170 DM6

I/O 172 DQ54

- 174 VSS

I/O 176 DQ55

I/O 178 DQ60

O 180 2.5VDD

I/O

O

I/O

O

-

I/O

I/O

O

O

O

-

I/O

I/O

O

O

O

O

O

-

-

-

I/O

I/O

O

O

I/O

-

I/O

I/O

I/O

-

I/O

I/O

O

Satellite P20-25 Series Maintenance Manual C-3

Table C-1 SODIMM I/F pin assignments (144-pin) (4/4)

Pin No. Signal name I/O Pin No. Signal Name

181 DQ57

183 DQS7

185 VSS

187 DQ58

189 DQ59

191 2.5VDD

I/O 182 DQ61

I/O 184 DM7

- 186 VSS

I/O 188 DQ62

I/O 190 DQ63

O 192 2.5VDD

193 SDA

195 SCL

I/O 194 SA0

O 196 SA1

197 3.3VDD_SPD O 198 SA2

199 VDD_ID O 200 DU

I/O

I/O

O

-

I/O

I/O

O

O

O

O

-

C-4 Satellite P20-25 Series Maintenance Manual

C.2 JP1 LCD I/F (40-pin)

Table C-2 LCD I/F pin assignments (40-pin)

Pin No. Signal name I/O Pin No. Signal Name I/O

1 PID3

3 PID1

5 GND

I 2 PID2

I 4 PID0

- 6 TZCLK-

I

I

O

7 TZCLK+ O 8 GND -

9 TZOUT3- O 10 TZOUT3+ O

11 TZOUT2- O 12 TZOUT2+ O

13 GND

15 TZOUT1+

17 TZOUT0+

19 TXCLK-

- 14 TZOUT1-

O 16 TZOUT0-

O 18 GND

O 20 TXCLK+

21 GND - 22 TXOUT3-

23 TXOUT3+ O 24 TXOUT2-

25 TXOUT2+ O 26 GND

O

O

-

O

O

O

-

27 TXOUT1-

29 TXOUT0-

O 28 TXOUT1+ O

O 30 TXOUT0+ O

31 GND - 32 NC -

33 +LCDVDD O 34 +LCDVDD O

35 DISPOFF# O 36 B_INVT_PWM O

37 DAC_BRIG O 38 NC -

39 B+ O 40 B+ O

Satellite P20-25 Series Maintenance Manual C-5

C.3 JP15 RGB I/F (15-pin)

Table C-3 RGB I/F pin assignments (15-pin)

Pin No. Signal name I/O Pin No. Signal Name I/O

1 CRTRED; 100

5 GND

7 GND (VGAGND)

9 VCC

11 NC

O 2 CRTGREEN; 100 O

-

- 6 GND

- 8 GND (VGAGND)

- 10 GND

13 CHSYNC; 100 O 14 CVSYNC; 100

15 DDCSCL;

-

-

- 12 DDCSDA; I/O

O

C-6 Satellite P20-25 Series Maintenance Manual

C.4 JP34 HDD I/F (44-pin)

Table C-4 HDD I/F pin assignments (44-pin)

Pin No. Signal name I/O Pin No. Signal Name

1 PIDE-RST O 2 GND

3 PDD07 I/O 4 PDD08

5 PDD06 I/O 6 PDD09

7 PDD05 I/O 8 PDD10

I/O

-

I/O

I/O

I/O

11 PDD03

13 PDD02

15 PDD01

17 PDD00

19 GND

21 PDDREQ

23 PDIOW

25 PDIOR

27 PIORDY

29 PDDACK

31 RQ14

33 PDA1

I/O 12 PDD12

I/O 14 PDD13

I/O 16 PDD14

I/O 18 PDD15

- 20 NC

I 22 NC

O 24 GND

O 26 GND

I 28 PCSEL

O 30 GND

I 32 NC

O 34 NC

35 PDA0

37 PDCS1

O 36 PDA2

O 38 PDCS3

39 PHDDLED I 40 GND

41 +5VS O 42 +5VS

43 GND - 44 NC

I/O

I/O

I/O

I/O

-

-

-

-

O

-

-

-

O

O

-

O

-

Satellite P20-25 Series Maintenance Manual C-7

C.5 JP28 Main Module I/F (60-pin)

Table C-5 CD-ROM I/F pin assignments (50-pin)

Pin No. Signal name I/O Pin No. Signal Name I/O

1 INT-CD-L

3 CD_AGND

I

-

2 INTCD-R

4 CD_AGND

5 CD_RSTDRV# O 6 CDD08

7 CDD07

9 CDD06

11 CDD05

I/O

I/O

8 CDD09

I/O 10 CDD10

12 CDD11

13 CDD04

15 CDD03

17 CDD02

19 CDD01

21 CDD00

23 PDIAG

25 CD_SIOW#

I/O

I/O

I/O

I/O

I/O

-

O

14 CDD12

16 CDD13

18 CDD14

20 CDD15

22 CD_DREQ

24 CD_SDIOR#

26 CD_DACK#

I

-

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I

O

O

27 CD_SIORDY

29 CD_IRQ

31 CD_SBA1

33 CD_SBA0

35 CD_SCS1#

37 SHDD_LED

39 EXTCSEL1

41 GND

I 28 CD_SBA2

I 30 CD_SCS3#

O 32 EXTID0

O 34 EXTID1

O 36 NC

I 38 HDSEL#

I 40 WGATE#

- 42 GND

O

O

I

I

-

O

O

-

43 GND

45 RDATA#

47 WP#

49 TRACK0#

51 WDATA#

53 STEP#

55 MTR0#

-

O

O

O

I

I

I

44 USBP7+

46 USBP7-

48 GND

50 FDDIR#

52 3MODE#

54 +5VCD

56 +5VCD

I/O

I/O

-

I

I

O

O

57 DSKCHG# O 58 INDEX# O

DRV0# I +5VCD O

C-8 Satellite P20-25 Series Maintenance Manual

C.6 JP29 Second Module I/F (60-pin)

Table C-5 CD-ROM I/F pin assignments (50-pin)

Pin No. Signal name

1 NC

3 NC

5 SIDE_RST#

7 IDE_SD07

9 IDE_SD06

11 IDE_SD05

13 IDE_SD04

15 IDE_SD03

17 IDE_SD02

19 IDE_SD01

21 IDE_SD00

23 PDIAG

25 IDE_SIOW#

27 IDE_SIORDY

29 IDE_SIRQ15

31 IDE_SBA1

33 IDE_SBA0

35 IDE_SCS1#

37 SHDD_LED

39 EXTCSEL2

41 GND

43 GND

45 NC

47 NC

49 NC

51 NC

53 NC

55 NC

57 NC

59 NC

I/O Pin No. Signal Name

- 2 NC

- 4 NC

O 6 IDE_SD08

I/O 8 IDE_SD09

I/O 10 IDE_SD10

I/O 12 IDE_SD11

I/O 14 IDE_SD12

I/O 16 IDE_SD13

I/O 18 IDE_SD14

I/O 20 IDE_SD15

I/O 22 IDE_SDREQ

- 24 IDE_SDIOR#

O 26 IDE_SDACK#

I 28 IDE_SDA2

I 30 IDE_SCS3#

O 32 EXTID2

O 34 EXTID3

O 36 NC

I 38 NC

I 40 NC

- 42 GND

- 44 USBP3+

- 46 USBP3-

- 48 GND

- 50 NC

- 52 NC

- 54 +5VS

- 56 +5VS

- 58 NC

- 60 +5VS

I/O

I/O

I/O

-

-

-

O

O

-

O

O

O

I

I

-

-

-

-

-

-

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I

O

O

Satellite P20-25 Series Maintenance Manual C-9

C.7 JP14 Parallel I/F (25-pin)

Table C-6 Parallel I/F pin assignments (25-pin)

Pin No. Signal name I/O Pin No. Signal Name I/O

1 STROB; 100 I/O

9 PDB07; 100 I/O 10 ACK; 000

11 BUSY; I 100

I

I

13 SELCT; I 000 O

15 ERROR; 000 O

19 GND

O 18 GND

- 20 GND

-

-

21 GND

23 GND

25 GND

- 22 GND

- 24 GND

-

-

-

C-10 Satellite P20-25 Series Maintenance Manual

C.8 JP21 PC Card I/F (150-pin)

Table C-7 PC Card I/F pin assignments (154-pin) (1/3)

Pin No. Signal name I/O Pin No. Signal Name I/O

A1 GND

A2 GND

A25 GND

- B1 GND

- B2 GND

O

O

B3 S2

B4 S2

O B22 S2

I B23 S2

I B24 S2

- B25 GND

I B26 S2

O B27 S2

I B28 S2

I B29 S2

I B30 S2

-

-

O

O

I/O

I/O

A9 GND - B9 GND

A17 GND

I B12 S2

O B13 S2

I

O

I

-

B14 S2

B15 S2

B16 S2

B17 GND

I

O

I

-

I B18 S2

I B19 S2

I

I

A20 S1 I INPACK# I

I B21 S2 I

I/O

I/O

-

I/O

I/O

I

O

O

I

I

-

I

O

I

I

I

Satellite P20-25 Series Maintenance Manual C-11

C-12

Table C-7 PC Card I/F pin assignments (154-pin) (2/3)

Pin No. Signal name

A33 GND

A37 +S1_VPP

A38

A39 +S1VCC

A43 GND

A51 GND

A59 GND

I/O Pin No. Signal Name

I B31 S2

I B32 S2

- B33 GND

I B34 S1

I B35 S1

I B36 S1

I B37 +S2_VPP

- B38

I B39 +S2VCC

I B40 S2

O B41 S2

I B42 S2

- B43 GND

I B44 S2

I B45 S2

I B46 S2

I B47 S2

I B48 S2

I B49 S2

I B50 S2

- B51 GND

I B52 S2

I B53 S2

I B54 S2

I B55 S2

O B56 S2

I B57 S2

I B58 S2

- B59 GND

I B60 S2

A62 S1 CE1# I B62 S2 CE1#

I/O

I

I

I

I

O

I

I

I

I

I

I

I

I

-

-

I

I/O

I

-

I

I

O

I

-

I

I

I

-

I

I

I

I

Satellite P20-25 Series Maintenance Manual

Table C-7 PC Card I/F pin assignments (154-pin) (3/3)

Pin No. Signal name I/O Pin No. Signal Name

A67 GND

A74 GND

A75 GND

- B67 GND

O B72 S2

- B74 GND

- B75 GND

I/O

I/O

I/O

I/O

I/O

-

I/O

I/O

I/O

I/O

O

I/O

-

-

Satellite P20-25 Series Maintenance Manual C-13

C.9 JP27 Mini PCI I/F (124-pin)

Table C-8 Mini PCI I/F pin assignments (124-pin) (1/2)

Pin No. Signal name

1 NC

3 NC

5 NC

7 NC

9 NC

11 NC

13 SWITCH

15 NC

I/O Pin No. Signal Name

- 2 NC

- 4 NC

- 6 NC

- 8 NC

- 10 NC

- 12 NC

O 14 NC

- 16 NC

I/O

-

-

-

-

-

-

-

-

19 3V

21 NC

23 GNGNDD

25 PCICLK

27 GND

29 REQ2

31 3V

33 AD31

35 AD29

37 GND

39 AD27

41 AD25

43 NC

45 CBE3

47 AD23

O 20 IRQD

- 22 NC

- 24 3.3V

O 26 MINI-SRT

- 28 3VS

I 30 GNT

O 32 GND

I/O 34 WLANME

I/O 36 NC

- 38 AD30

I/O 40 3VS

I/O 42 AD28

- 44 AD26

I/O 46 AD24

I/O 48 AD19

49 GND

51 AD21

- 50 GND

I/O 52 AD22

53 AD19

55 GND

57 AD17

I/O 54 AD20

- 56 PAR

I/O 58 AD18

59 CBE2; I/O 60 AD16

I

-

O

O

O

O

-

I

-

I/O

O

I/O

I/O

I/O

I/O

-

I/O

I/O

I/O

I/O

I/O

C-14 Satellite P20-25 Series Maintenance Manual

Table C-8 Mini PCI I/F pin assignments (124-pin)(1/2)

Pin No. Signal name

61 IRDY

63 P3V

65 CLKRUN

67 SERR

69 GND

71 P3V

73 CBE1

75 AD14

77 GND

79 AD12

81 AD10

83 GND

85 AD08

87 AD07

89 P3V

91 AD05

93 NC

95 AD03

97 VCC

99 AD01

101 GND

103 NC

105 NC

107 NC

109 NC

111 SPK

113 GND

115 NC

117 GND

119 GND

121 NC

123 VCC

I/O Pin No. Signal Name

I/O 62 GND

O 64 FRAME

I/O 66 TRDY

I/O 68 STOP

- 70 3VS

O 72 DEVSEL

I/O 74 GND

I/O 76 AD15

- 78 AD13

I/O 80 AD11

I/O 82 GND

- 84 AD09

I/O 86 CBE0

I/O 88 3VS

O 90 AD06

I/O 92 AD04

- 94 AD02

I/O 96 AD00

O 98 NC

I/O 100 NC

- 102 GND

- 104 GND

- 106 NC

- 108 NC

- 110 NC

I 112 NC

- 114 GND

- 116 NC

- 118 GND

- 120 GND

- 122 MPCACT

- 124 3.3VAUX

I/O

-

-

-

-

-

-

-

I/O

I/O

I/O

I/O

-

-

-

-

-

I

-

-

I/O

I/O

I/O

O

I/O

-

I/O

I/O

I/O

-

I/O

I/O

O

Satellite P20-25 Series Maintenance Manual C-15

C.10 JP22, JP23, JP25 Fan I/F (3-pin)

Table C-9-1 JP22 Fan I/F pin assignments (3-pin)

Pin No. Signal name

1 FAN2-1

3 GND

I/O Pin No. Signal Name I/O

O 2 FAN-DET_F I

-

Table C-9-2 JP23 Fan I/F pin assignments (3-pin)

Pin No. Signal name

1 FAN2

3 GND

I/O Pin No. Signal Name I/O

O 2 FAN-SPEED2 I

-

Table C-9-3 JP25 Fan I/F pin assignments (4-pin)

Pin No. Signal name

1 GND

3 NC

I/O Pin No. Signal Name I/O

- 2 FAN-SPEED I

- 4 FAN1 O

C.11 AC Adaptor Connector (3-pin)---Find Power Team

Table C-10 AC Adaptor Connector pin assignments (3-pin)

Pin No. Signal name

1 DCIN

3 GND

I/O Pin No. Signal Name

I 2 GND

-

I/O

-

C.12 Microphone (6-pin)

Table C-11 Microphone I/F pin assignments (6-pin)

Pin No. Signal name

1 ANGND

3 BIAS

5 NC

I/O Pin No. Signal Name

- 2 MIC

I 4 NC

- 6 ANGND

I/O

I

-

-

C-16 Satellite P20-25 Series Maintenance Manual

C.13 Headphone Connector (6-pin)

Table C-12 Headphone Connector pin assignments (6-pin)

Pin No. Signal name I/O Pin No. Signal Name I/O

1 ANGND - 2 INTSPKL O

3 INTSPKR O 4 NBA -

5 GND I 6 NC -

Satellite P20-25 Series Maintenance Manual C-17

C-18 Satellite P20-25 Series Maintenance Manual

Appendix D

Appendix D Keyboard Scan/Character Codes

Table D-1 Scan codes (set 1 and set 2) (1/4)

Cap

No.

Keytop

Code set 1 Code set 2

Make Break Make Break

Note

07

08

09

10

11

12

01

02

03

04

05

06

‘ ~

1 !

2 @

3 #

4 $

5 %

6 ^

7 &

8 *

9 (

0 )

- _

29

02

03

04

05

06

07

08

09

0A

0B

0C

A9

82

83

84

85

86

87

88

89

8A

8B

8C

0E

16

1E

26

25

2E

36

3D

3E

46

45

4E

F0

F0

F0

F0

F0

F0

F0

F0

F0

F0

F0

F0

0E

16

1E

26

25

2E

36

3D

3E

46

45

4E

*2

*2

*2

13 = + 0D 8D 55 F0 55

15 BkSp 0E 8E 66 F0 66

17 Q 10 90 15 F0 15

19 E 12 92 24 F0 24

22 Y 15 95 35 F0 35

24 I 17 97 43 F0 43 *2

25 O 18 98 44 F0 44 *2

27

28

[ {

] }

1A

1B

9A

9B

54

5B

F0

F0

54

5B

Satellite P20-25 Series Maintenance Manual D-1

D-2

Table D-1 Scan codes (set 1 and set 2) (2/4)

Cap

No.

Keytop

Code set 1 Code set 2

Note

Make Break Make Break

29 \ | 2B AB 5D F0 5D *5

30 Caps

33 D 20 A0 23 F0 23

35 G 22 A2 34 F0 34

36 H 23 A3 33 F0 33

38 K 25 A5 42 F0 42 *2

40

41

; :

‘ “

27

28

A7

A8

4C

52

F0

F0

4C

52

*2

45 No.102 56 D6 61 F0 61 key

50 B 30 B0 32 F0 32

51 N 31 B1 31 F0 31

53

54

55

, <

. >

/ ?

33

34

35

B3

B4

B5

41

49

4A

F0

F0

F0

41

49

4A

*2

*2

*2

Satellite P20-25 Series Maintenance Manual

Table D-1 Scan codes (set 1 and set 2) (3/4)

Cap

No.

Keytop

Code set 1 Code set 2

Note

Make Break Make Break

58 Ctrl(L) 1D 9D 14 F0 14 *3

62 ALT

64 Ctrl(R) E0 1D E0 9D E0 14 E0 F0 14

75

76

79

Ins E0 52 E0 D2 E0 70 E0 F0 70 *1

Del E0 53 E0 D3 E0 71 E0 F0 71

← E0 4B E0 CB E0 6B E0 F0 6B

*1

*1

80

81

83

84

85

86

89

Home E0 47 E0 C7 E0 6C E0 F0 6C *1

End E0 4F E0 CF E0 69 E0 F0 69 *1

E0 48 E0 C8 E0 75 E0 F0 75

E0 50 E0 D0 E0 72 E0 F0 72

*1

*1

PgUp E0 49 E0 C9 E0 7D E0 F0 7D *1

PgDn E0 51 E0 D1 E0 7A E0 F0 7A *1

→ E0 4D E0 CD E0 74 E0 F0 74 *1

110 Esc 01 81 76

112 F1 3B BB 05 F0

76

05

113

114

F2

F3

3C

3D

BC

BD

06

04

F0

F0

06

04

115

116

117

118

119

120

121

F4

F5

F6

F7

F8

F9

F10

3E

3F

40

41

42

43

44

BE

BF

C0

C1

C2

C3

C4

0C

03

0B

83

0A

01

09

F0

F0

F0

F0

F0

F0

F0

0C

03

0B

83

0A

01

09 *3

Satellite P20-25 Series Maintenance Manual D-3

Cap

No.

Keytop

Table D-1 Scan codes (set 1 and set 2) (4/4)

Code set 1 Code set 2

Make Break Make Break

Note

X x

*6

*7 *7 *7 *7 *7

— — — — *4

Win E0

App E0

Notes:

1. * Scan codes differ by mode.

2. * Scan codes differ by overlay function.

3. * Combination with the Fn key gives different codes.

4. * The key does not generate a code by itself.

5. * This key corresponds to key No. 42 in a 102-key model.

6. * Refer to Table D-6, No. 124 key scan code.

7. * Refer to Table D-7, No. 126 key scan code.

D-4 Satellite P20-25 Series Maintenance Manual

Table D-2 Scan codes with left Shift key

Cap

No.

55

Key top

Code set 1

Make Break

Code set 2

Make Break

/ E0 AA E0 35 E0 B5 E0 2A E0 F0 12 E0 4A E0 F0 4A E0 12

79 ← E0 AA E0 4B E0 CB E0 2A E0 F0 12 E0 6B E0 F0 6B E0 12

80 Home E0 AA E0 47 E0 C7 E0 2A E0 F0 12 E0 6C E0 F0 6C E0 12

81 End E0 AA E0 4F E0 CF E0 2A E0 F0 12 E0 69 E0 F0 69 E0 12

83 ↑ E0 AA E0 48 E0 C8 E0 2A E0 F0 12 E0 75 E0 F0 75 E0 12

84 ↓ E0 AA E0 50 E0 D0 E0 2A E0 F0 12 E0 72 E0 F0 72 E0 12

85 PgUp E0 AA E0 49 E0 C9 E0 2A E0 F0 12 E0 7D E0 F0 7D E0 12

86 PgDn E0 AA E0 51 E0 D1 E0 2A E0 F0 12 E0 7A E0 F0 7A E0 12

89 → E0 AA E0 4D E0 CD E0 2A E0 F0 12 E0 74 E0 F0 74 E0 12

X Win E0 AA E0 5B E0 DB E0 2A E0 F0 12 E0 1F E0 F0 1F E0 12

Note : The table above shows scan codes with the left Shift key. In combination with the right Shift key, scan codes are changed as listed below:

Set 1

Set 2

Shift Shift

E0 AA ___________E0 B6

E0 2A ____________E0 36

E0 F0 12 _________E0 F0 59

E0 12 ____________E0 59

Satellite P20-25 Series Maintenance Manual D-5

Table D-3 Scan codes in Numlock mode

Cap

No.

Key top

Code set 1 Code set 2

Make Break Make Break

75 INS E0 2A E0 52 E0 D2 E0 AA E0 12 E0 70 E0 F0 70 E0 F0 12

76 DEL E0 2A E0 53 E0 D3 E0 AA E0 12 E0 71 E0 F0 71 E0 F0 12

79 ← E0 2A E0 4B E0 CB E0 AA E0 12 E0 6B E0 F0 6B E0 F0 12

80 Home E0 2A E0 47 E0 C7 E0 AA E0 12 E0 6C E0 F0 6C E0 F0 12

81 End E0 2A E0 4F E0 CF E0 AA E0 12 E0 69 E0 F0 69 E0 F0 12

83

84

E0 2A E0 48 E0 C8 E0 AA E0 12 E0 75 E0 F0 75 E0 F0 12

E0 2A E0 50 E0 D0 E0 AA E0 12 E0 72 E0 F0 72 E0 F0 12

85 PgUp E0 2A E0 49 E0 C9 E0 AA E0 12 E0 7D E0 F0 7D E0 F0 12

86 PgDn E0 2A E0 51 E0 D1 E0 AA E0 12 E0 7A E0 F0 7A E0 F0 12

89 → E0 2A E0 4D E0 CD E0 AA E0 12 E0 74 E0 F0 74 E0 F0 12

X Win E0 2A E0 5B E0 DB E0 AA E0 12 E0 1F E0 F0 1F E0 F0 12

X App E0 2A E0 5D E0 DD E0 AA E0 12 E0 2F E0 F0 2F E0 F0 12

Table D-4 Scan codes with Fn key

Cap

No. Keytop

Code set 1 Code set 2

Make Break Make Break

43 ENT E0 1C E0 9C E0 5A

58 L-CTRL E0 1D E0 9D E0 14 E0 F0 14

60 L-ALT E0 38 E0 B8 E0 11 E0 F0 11

121 ARROW 45 C5 77 F0 77

122 NUMERIC

123 Scrl

45

46

C5

C5

77

7E

F0

F0

77

7E

D-6 Satellite P20-25 Series Maintenance Manual

Table D-5 Scan codes in overlay mode

Cap

No.

Keytop

Code set 1 Code set 2

Make Break Make Break

09 8 (8) 48

10 9 (9) 49

11 0 (*) 37

23 U (4) 4B

24 I (5) 4C

25 O (6) 4D

26 P (–) 4A

37 J (1) 4F

38 K (2) 50

39 L (3) 51

40 ; (+) 4E

52 M (0) 52

54 . (.) 53

C8

C9

B7

CB

CC

CD

CA

CF

D0

D1

CE

D2

D3

75 F0 75

7D F0 7D

7C F0 7C

6B F0 6B

73 F0 73

74 F0 74

7B F0 7B

69 F0 69

72

7A

79

70

71

F0

F0

F0

72

7A

F0 79

70

F0 71

Table D-6 No.124 key scan code

Key top

Shift

Code set 1 Code set 2

Make Break Make Break

Prt E0 AA E0 12 E0 7C E0 F0 7C E0 F0 12

Ctrl +

Shift +

37

37

B7

B7

E0 7C

E0 7C

E0

E0

Alt + 54 D4 84 B4

Satellite P20-25 Series Maintenance Manual D-7

Table D-7 No.126 key scan code

Key top Shift Code set 1 Code set 2

Make Make

Pause Common E1 1D 45 E1 9D C5 E1 14 77 E1 F0 14 F0 77

Ctrl E0 46 E0 C6 E0 7E E0 F0 7E

*: This key generates only make codes.

D-8 Satellite P20-25 Series Maintenance Manual

Appendix E

Appendix E Key Layout

E.1 United States (US) Keyboard

Figure E-1 US keyboard

E.2 United Kingdom (UK) Keyboard

Figure E-2 UK keyboard

Satellite P20 Series Maintenance Manual E-1

Figure E-3 SP keyboard

E.4 Japanese (JA) Keyboard

E-2

Figure E-3 JA keyboard

Satellite P20 Series Maintenance Manual

E.5 Korean (KO) Keyboard

Figure E-3 KO keyboard

Satellite P20 Series Maintenance Manual E-3

E-4 Satellite P20 Series Maintenance Manual

Appendix F Series Screw Torque List

Table F-1 Series Screw Torque List

SCREW P/N

MAC925006Z0

MAC925006Z0

SCREW SPEC

M2.5*6

M2.5*6

Q'ty LOCATION

2

1

AUDIO PCB TO LL

CIR PCB TO LL

MAC925006Z0 M2.5*6 7 LU TO LL TOP SIDE

LL TO LU BOTTOM

SIDE

LL TO LU BOTTOM

SIDE

MACK25040Z0 M2.5*4 2 HDD ASSY TO LL

SCREW

TORQUE

Satellite P20-25 Series Maintenance Manual F-1

F-2

SCREW P/N

MACA0007204

SCREW SPEC

M2.5*3

Q'ty

2

LOCATION

MDC TO MB

USER KEY FPC

( R )

PWR FPC SUPP

UP ( L )

UP

SCREW

TORQUE

UP

UP HINGE COVER

SIDE

LL TO LU BOTTOM

SIDE

SIDE

COVER SUB

LCD cover

DIRECT PCB w/BKT

TO DIRECT PLAY

DOOR

MAAA0015320 M2*3 7

TV

TUNER/HOUSING

MACK20040N0 M2*4 4 PCMCIA TO MB

Satellite P20-25 Series Maintenance Manual

SCREW P/N

MACK20040N0

SCREW SPEC

M2*4

Q'ty LOCATION

2 BLUETOOTH TO MB

UP HINGE COVER

SIDE

SCREW

TORQUE

COMBO MODULE

KME

/HOUSING/PANEL

DVD MODULE

MACK20040N0 M2*4 5

HOUSING

COMBO MODULE

TOSHIBA /

HOUSING

MMCK20040N1 M2*4 4

MB

UP HINGE COVER

SIDE

UP HINGE COVER

TO LOGIC TOP

SIDE

COMBO MODULE

/HOUSING/PANEL

DVD MODULE

HOUSING

COMBO MODULE

HOUSING

COMBO MODULE

MAAAA173500 M1.7*3.5 3 KME

/HOUSING/PANEL

BTQ00_BATTERY_A

SSY_WEIGHT_SAV

ER

BTQ00_BATTERY_A

ER

Satellite P20-25 Series Maintenance Manual F-3

F-4 Satellite P20-25 Series Maintenance Manual

Appendix G

Appendix G Reliability

The following table shows MTBF (Mean Time Between Failures) for each component.

Table G-1 MTBF

LCD 50,000

Keyboard 40,000

HDD 300,000

Removable FDD 30,000

Optical (DVD/CD) drive

AC adapter

60,000

60,000

Satellite P20 Series Maintenance Manual G-1

G-2 Satellite P20 Series Maintenance Manual

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