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portege a200
Service Manual
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Toshiba portege a200 Service Manual

1
Toshiba Personal Computer
PORTEGE A200 series
Maintenance Manual
TOSHIBA CORPORATION
File Number 960-499
Copyright
© 2004 by Toshiba Corporation. All rights reserved. Under the copyright laws, this manual cannot be reproduced in any form without the prior written permission of Toshiba. No patent liability is assumed, with respect to the use of the information contained herein.
Toshiba PORTEGE A200series Maintenance Manual
First edition October 2004
Disclaimer
This manual has been validated and reviewed for accuracy. The instructions and descriptions it contains are accurate for the Toshiba PORTEGE A200 series Maintenance Manual at the time of this manual's production. However, succeeding computers and manuals are subject to change without notice. Toshiba assumes no liability for damages incurred directly or indirectly from errors, omissions or discrepancies between the computer and the manual.
Trademarks
Intel, Pentium and Celeron are registered trademarks and Speed Step is a trademark of Intel Corporation. Windows and Microsoft are registered trademarks of Microsoft Corporation. Photo CD is a trademark of Eastman Kodak. Other trademarks and registered trademarks not listed above may be used in this manual. Bluetooth is a trademark owned by its proprietor and used by Toshiba under license.
Preface
This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer PORTEGE A200 series.
The procedures described in this manual are intend ed 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. Be sure to use the PH
Point size “0” and “1” screwdrivers complying with the ISO/DIS 8764-1:1996. 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.
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the PORTEGE A200 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 ? Display codes ? Key layout ? Wiring diagrams ? BIOS Rewrite Procedures ? EC/KBC Rewrite Procedures ? Reliability ? Key FD
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 PORTEGE A200 that appears on its display is presented in the type face below:
Format complete System transferred

Table of Contents

Chapter 1 Hardware Overview
1.1 Features ......................................................................................................................1-1
1.2 Hard Disk Drive.........................................................................................................1-9
1.3 Keyboard..................................................................................................................1-10
1.4 Optical Drive ............................................................................................................1-11
1.5 TFT Color Display...................................................................................................1-13
1.6 Power Supply...........................................................................................................1-15
1.7 Batteries ...................................................................................................................1-17
1.8 AC Adapter..............................................................................................................1-20
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting .........................................................................................................2-1
2.2 Troubleshooting Flowchart........................................................................................2-2
2.3 Power Supply Troubleshooting..................................................................................2-6
2.4 System Board Troubleshooting................................................................................2-16
2.5 USB FDD Troubleshooting .....................................................................................2-28
2.6 HDD Troubleshooting .............................................................................................2-31
2.7 Optical Drive Troubleshooting ................................................................................2-36
2.8 Display Troubleshooting ..........................................................................................2-37
2.9 Keyboard Troubleshooting ......................................................................................2-39
2.10 Touch Pad Troubleshooting.....................................................................................2-40
2.11 SD Card Slot Troubles hooting.................................................................................2-41
2.12 Modem Troubleshooting ..........................................................................................2-42
2.13 LAN Troubleshooting..............................................................................................2-43
2.14 Sound Troubleshooting............................................................................................2-44
2.15 Wireless LAN Troubleshooting...............................................................................2-47
Chapter 3 Tests and Diagnostics
3.1 The Diagnostic Test...................................................................................................3-1
3.2 Executing the Diagnostic Test ...................................................................................3-4
3.3 Setting of the hardware configuration........................................................................3-8
3.4 Heatrun Test.............................................................................................................3-11
3.5 Subtest Names..........................................................................................................3-12
3.6 System Test ..............................................................................................................3-14
3.7 Memory Test ............................................................................................................3-16
3.8 Keyboard Test ..........................................................................................................3-17
3.9 Display Test .............................................................................................................3-18
3.10 Floppy Disk Test......................................................................................................3-21
3.11 Printer Test...............................................................................................................3-23
3.12 Async Test ................................................................................................................3-25
3.13 Hard Disk Test.........................................................................................................3-26
3.14 Real Timer Test ........................................................................................................3-29
3.15 NDP Test..................................................................................................................3-31
3.16 Expansion Test.........................................................................................................3-32
3.17 CD-ROM/DVD-ROM Test .....................................................................................3-34
3.18 Error Code and Error Status Names.........................................................................3-35
3.19 Hard Disk Test Detail Status....................................................................................3-38
3.20 ONLY ONE TEST...................................................................................................3-40
3.21 Head Cleaning..........................................................................................................3-46
3.22 Log Utilities .............................................................................................................3-47
3.23 Running Test ............................................................................................................3-49
3.24 Floppy Disk Drive Utilities......................................................................................3-50
3.25 System Configuration..............................................................................................3-55
3.26 Wireless LAN Test Program (Intel-made b/g).........................................................3-57
3.27 Wireless LAN Test Program (Askey-made)............................................................3-61
3.28 LAN/Modem/Bluetooth/IEEE1394 Test Program ..................................................3-65
3.29 Sound Test program .................................................................................................3-79
3.30 SETUP .....................................................................................................................3-85
Chapter 4 Replacement Procedures
4.1 Overview...................................................................................................................4-1
4.2 Battery pack ..............................................................................................................4-8
4.3 PC card....................................................................................................................4-10
4.4 SD memory card .....................................................................................................4-11
4.5 Connector panel......................................................................................................4-12
4.6 Keyboard.................................................................................................................4-13
4.7 Optical drive............................................................................................................4-16
4.8 Palm rest/Touch pad................................................................................................4-18
4.9 HDD ........................................................................................................................4-22
4.10 Memory module ......................................................................................................4-24
4.11 Wireless LAN module ...........................................................................................4-26
4.12 Internal microphone ................................................................................................4-27
4.13 MDC module...........................................................................................................4-28
4.14 Speaker....................................................................................................................4-29
4.15 Cover assembly.......................................................................................................4-31
4.16 RTC battery.............................................................................................................4-35
4.17 Battery latch assembly ............................................................................................4-36
4.18 CPU fan...................................................................................................................4-37
4.19 SD board/System board ..........................................................................................4-38
4.20 Heat sink/CPU.........................................................................................................4-40
4.21 LCD mask/FL inverter/LED board.........................................................................4-44
4.22 LCD unit .................................................................................................................4-48
4.23 LCD cable/LED cable .............................................................................................4-51
4.24 Wireless LAN antenna ............................................................................................4-56
4.25 Hinge assembly.......................................................................................................4-58
4.26 Fluorescent l amp.....................................................................................................4-60
Appendices
Appendix A Handling the LCD Module ........................................................................ A-1
Appendix B Board Layout...............................................................................................B-1
Appendix C Pin Assignments......................................................................................... C-1
Appendix D Keyboard Scan/Character Codes ............................................................... D-1
Appendix E Key Layout..................................................................................................E-1
Appendix F Wiring Diagrams .........................................................................................F-1
Appendix G BIOS Rewrite Procedures .......................................................................... G-1
Appendix H EC/KBC Rewrite Procedures..................................................................... H-1
Appendix I Reliability.....................................................................................................I-1
Appendix J Key FD.........................................................................................................J-1

Chapter 1 Hardware Overview

1 Hardware Overview
1 Hardware Overview
1 Hardware Overview
Chapter 1 Contents
1.1 Features ......................................................................................................................1-1
1.2 Hard Disk Drive.........................................................................................................1-9
1.3 Keyboard..................................................................................................................1-10
1.4 Optical Drive ............................................................................................................1-11
1.4.1 CD-RW/DVD-ROM Drive ................................................................1-11
1.4.2 DVD-multi Drive................................................................................1-12
1.5 TFT Color Display...................................................................................................1-13
1.5.1 LCD Module.......................................................................................1-13
1.5.2 FL Inverter Board ...............................................................................1-14
1.6 Power Supply...........................................................................................................1-15
1.7 Batteries ...................................................................................................................1-17
1.7.1 Main Battery.......................................................................................1-17
1.7.2 Main Battery Charging Control..........................................................1-18
1.7.3 RTC battery........................................................................................1-19
1.8 AC Adapter..............................................................................................................1-20
1 Hardware Overview
Figures
Figure 1-1 Front of the computer.....................................................................................1-4
Figure 1-2 System unit configuration ..............................................................................1-4
Figure 1-3 System block diagram....................................................................................1-5
Figure 1-4 2.5-inch HDD.................................................................................................1-9
Figure 1-5 Keyboard......................................................................................................1-10
Tables
Table 1-1 2.5-inch HDD specifications..........................................................................1-9
Table 1-2 CD-RW/DVD-ROM drive specifications ....................................................1-11
Table 1-3 DVD-Multi drive specifications ..................................................................1-12
Table 1-4 LCD m odule specifications (TMD-maid 12.1 TFT)....................................1-13
Table 1-5 FL inverter board specifications ..................................................................1-14
Table 1-6 Power supply output specifications .............................................................1-15
Table 1-7 Battery specifications ...................................................................................1-17
Table 1-8 Operating time..............................................................................................1-17
Table 1-9 Maintaining time..........................................................................................1-17
Table 1-10 Time required for charging battery ..............................................................1-18
Table 1-11 RTC battery charging time...........................................................................1-19
Table 1-12 Maintaining time..........................................................................................1-19
Table 1-13 AC adapter specifications ............................................................................1-20

1.1 Features 1 Hardware Overview

1 Features
1.1 Features
The PORTEGE A200 series are an ultra thin and lightweight PC realizing cable -less environment on a table by wireless function with a Mobile Intel® Pentium®-M processor or Intel® Celeron®-M processor realizing high performance.
There are some models in the PORTEGE A200. For the configuration of each model, refer the parts list.
? Microprocessor
Intel Mobile® Pentium® -M Processor
A 1.60GHz Intel Mobile® Pentium-M Processor with a 1.60GHz internal clock, 400MHz bus and 1.308V to 0.748V core operation.
Intel Mobile® Celeron®-M Processor
A 1.4GHz Intel Mobile® Celeron®-M Processor with a 1.4GHz internal clock, 400MHz bus.
? Cache memory
Intel Mobile® Pentium®-M Processor has 64KB primary cache and 2MB secondary cache.
Intel Mobile® Celeron®-M Processor has 64KB primary cache and 512KB secondary cache.
? Memory
Two memory slots are equipped. Memory module can be installed up to 2GB (2,048MB). Memory modules of 256MB, 512MB and 1GB(1,024MB) available.
? VGA/VRAM
A VGA controller is built in MontaraGM+. VRAM: Maximum 64MB when the capacity of system memory is 256MB or more.
Maximum 32MB when the capacity of system memory is 128MB or less.
? HDD
Built-in 2.5-inch x 9.5mm height, 40GB or 60GB HDD, depending on the model.
? USB FDD (Optional)
Supports a USB 3.5-in ch FDD, which connected to a USB port, supports 720KB and
1.44MB formats and enables booting from system FD.
1 Hardware Overview 1.1 Features
? Display
LCD and CRT can be displayed at the same time. LCD
Built-in 12.1 inch, 262,144 colors, XGA (1,024?768 dots), thin type low temperature poly-silicon TFT color display.
CRT
Supported via a RGB connector.
TV-out (S-Video output)
Has a TV output terminal.
? Optical drive
Built-in a CD-RW/DVD-ROM drive or DVD-Multi drive.
? Keyboard
An-easy-to-use 84-key (US) or 85-key (UK) keyboard provides a numeric keypad overlay for fast numeric data entry or for cursor and page control. The keyboard supports a Windows key and an application key.
? Touch pad
Touch pad is installed as a pointing device.
? Battery
The RTC battery is mounted inside the computer. The main battery is a detachable lithium-ion main battery (10.8V-4,400mAh) and the RTC battery is a lithium ion battery (2.4V-16mAh).
? USB (Universal Serial Bus )
The computer comes with three USB ports that comply with the USB 2.0 standard. The USB 2.0 enables daisy-chain connection of up to 127 USB-equipped devices and 480Mbps serial data transfer. It is designed for easy configuration by a Plug-and-Play operating system and provides hot insertion/ejection capability.
? PC card slot
A Type II PC card is acceptable.
1.1 Features 1 Hardware Overview
? SD card slot
The computer is equipped with a SD Card slot that can accommodate Secure Digital flash memory cards. SD cards let the user easily transfer data from devices, such as digital cameras and Personal Digital Assistants that use SD Card flash-memory. The cards have a high-level of security and copy protection features.
? Sound system
The sound system is equipped with the following:
? Stereo Speaker ? Built-in Microphone ? Volume control knob ? Headphone jack ? External microphone jack
? One touch button
An Internet button, mail button and Toshiba Console button are installed.
? Built-in Modem
The computer contains a MDC, enabling data and fax communication. It supports ITU-T V.90 (V.92). The transfer rates are 56 Kbps for data reception, 33.6 Kbps for data transmission, and 14,400 bps for fax transmission. However, the actual speed depends on the line quality. The RJ11 modem jack is used to accommodate a telephone line. Both of V.90 and V.92 are supported only in USA, Canada and Australia. Only V.90 is available in o ther regions.
? LAN
The computer is equipped with LAN circuits that support Ethernet LAN (10 mega bits per second, 10BASE-T) and Fast Ethernet LAN (100 mega bits per second, 100 BASE-TX).
? Wireless LAN (mini PCI Card slot )
The computer is equipped with a min i-PCI Type III wireless LAN board that supports
802.11 b/g (Intel or Askey made) or 802 11/b (Intel made). This function can be switched on and off by a switch on the computer.
? IEEE1394
1 Hardware Overview 1.1 Features
The computer comes with one IEEE 1394 port. It enables high-speed data transfer directly from external devices such as digital video cameras.
1.1 Features 1 Hardware Overview
Figure 1-1 shows the front of the computer and Figure 1-2 shows the system units configuration.
Figure 1-1 Front of the computer
Figure 1-2 System unit configuration
1 Hardware Overview 1.1 Features
Figure 1-3 shows the system block diagram.
Figure 1-3 System block diagram
1.1 Features 1 Hardware Overview
The PC contains the following components.
? CPU
Intel Mobile® Pentium®-M Processor A 1.60GHz Intel Mobile® Pentium® M Processor with a 1.60GHz internal clock,
400MHz bus and 1.308V to 0.748V core operation. Cache memory: 64KB primary cache and 2MB secondary cache.
Intel Mobile® Celeron®-M Processor A 1.4GHz Intel Mobile® Celeron®-M Processor with a 1.4GHz internal clock, 400MHz bus. Cache memory: 64KB primary cache and 512KB secondary cache.
? Memory
Two memory slots (DDR266). Memory modules of 256MB, 512MB or 1GB(1,024MB) can be installed to a maximum of 2GB (2,048MB).
? 3.3V operation ? Access time 6ns ? Memory Supporting PC-2700
? BIOS ROM (FWH)
? 8Mbit (512K?16-bit chip)
? PCI chipset
This gate array incorporates the following elements and functions.
? North Bridge: Intel 855GME (GMCH-M)
? Banias Processor System bus support ? DRAM control ( supports DDR200/DDR256) ? Built-in graphic control ? RGB, DVI, DVO interface ? AGP master slave interface (Complies with AGP V2.0) ? PCI interface (Complies with PCI Rev 2.2) ? Complies with ACPI 1.0 ? Supports Intel Speed step Technology ? 732-ball (37.5x37.5mm) micro FCBGA package
1 Hardware Overview 1.1 Features
? South Bridge: Intel 82801DBM (ICH4 -M)
? PCI 3.3V/5V tolerance interface ? Steerable PCI interrupts for PCI device P lug-and-Play ? Enhanced DMA controller ? Interrupt controller ? Counter/timers ? Distributed DMA supported ? PC/PCI DMA supported ? Serial IRQ supported ? Low Pin Count (LPC) host controller ? Plug -and-Play supported ? ACPI supporting features ? Built-in PCI IDE controller ? USB interface ? SMBus interface ? Audio system ? SW modem interface ? 421-ball (31mm x 31mm) BGA package
? PC card controller (YEBISUSS)
? PCI interface (PCI Revision2.2) ? Chipset interface ? CardBus/PC Card controller (Yenta Version2.2) :2 slots ? SD memory card controller (SDHC Ver.1.2) ? SDIO card controller (Ver.1.1) ? Smart card interface ? SIO(UART) controller(MS Debug Port Specification ver.1.0) ? Docking station interface ? External device interface ? 1.0mm pitch pin/17mm PBGA package
? VGA controller
Included in the North Bridge.
? Modem controller
Supported by Agere-made Modem controller and Askey-made MDC using the secondary AC97 Line.
? LAN controller (Intel–made ED82562ET (Kinnereth))
Controls LAN and supports 100Base-TX and 10Base-T.
1.1 Features 1 Hardware Overview
? Other main system chips
? EC/KBC (Mitsubishi-made M306K9FCLRP) ? PSC (Toshiba made TMP87PM48V01U) ? Clock Generator (ICS-made ICS950812GT) ? TV Encoder (Chrontel-made CH7011A) ? SOUND CODEC (ADI-made AD1981B) ? AMP (Matsushita-Made AN12940AA-VF)

1 Hardware Overview 1.2 Hard Disk Drive

1.2 Hard Disk Drive
The 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 is equipped with a 40 or 60GB HDD.
Figure 1-4 shows a view of the 2.5-inch HDD and Tables 1-1 lists the specifications.
Figure 1-4 2.5-inch HDD
Table 1-1 2.5-inch HDD specifications
specifications
Parameter
Outline Width (mm) 69.85 69.85 dimensions Height (mm) 9.5 9.5 Depth (mm) 100.0 100.0 Weight (g) 95 95
Storage size (formatted) 40 60 Speed (RPM) 4200 4,200 Data transfer speed (Mb/s) 175.0-341.7 175.0-341.7 Interface transfer rate (MB/s) 100 max.
Track density (Ktpi) 88.1 88.1 Average seek time (ms)
Read Write
Start time (ms) 4 4
TOSHIBA
HDD2190B
12
-
TOSHIBA
HDD2189B
(Ultra DMA mode)
12
-

1.3 Keyboard 1 Hardware Overview

1.3 Keyboard
The 84-key (US) or 85-key (UK) keyboard that consists of character keys and control keys is mounted The keyboard is connected to membrane connector on the system board and controlled by the keyboard controller on the system board.
Figure1-5 is a view of the keyboard. See Appendix E about a layout of the keyboard.
Figure 1-5 Keyboard

1 Hardware Overview 1.4 Optical Drive

1.4 Optical Drive
1.4.1 CD-RW/DVD-ROM Drive
This drive is a combination of DVD-ROM and CD-R/RW Drive. It is full-size and runs either 12cm (4.72-inch) or 8cm (3.15-inch) DVD/CDs without an adaptor. This drive reads CD-ROM at maximum 24-speed, reads DVD-ROM at maximum 8-speed and writes CD-R at maximum 24-speed, and writes CD-RW at 4-speed.
The specifications are listed in Table 1-2.
Table 1-2 CD-RW/DVD-ROM drive specifications
Parameter
Outline Width (mm) 128 Dimensions Height (mm) 9.5 Depth (mm) 126
Date transfer speed READ
Write CD-R
ATAPI interface PIO mode
Buffer memory 2MB Access time DVD-ROM
CD supported CD: CD -DA, CD-ROM, CD-ROM XA
DVD-ROM CD-ROM
CD-RW
DMA mode Ultra DMA mode
CD-ROM
4X, 8x(CLV), Max. 24X(ZCLV)
16.6 MB/s(Multiword Mode2)
CD-R, CD -RW Photo CD, Video CD CD-Extra(CD+), CD text
DVD: DVD-ROM DVD-R DVD-RW(Ver. 1.1) DVD-RAM(2.6GB/4.7GB) DVD+R, DVD+RW
Matsushita
G8CC0001N710
Max. 8X CAV
Max. 24x CAV
4X (CLV)
16.6MB/s (PIO Mode4)
33.3MB (Mode2)
170ms typ. (1/3 stroke) 150ms typ. (1/3 stroke)
1.4 Optical Drive 1 Hardware Overview
1.4.2 DVD-multi Drive
This drive is a combination of CD-R/RW, DVD-R/RW and DVD-RAM Drive. It is full-size and runs either 12cm (4.72-inch) or 8cm (3.15-inch) DVD/CDs without an adapter. This drive reads CD-ROM at maximum 24-speed, reads DVD-ROM at maximum 8-speed, writes CD-R at maximum 16-speed, writes CD-RW at maximum 4-speed, writes DVD-R at maximum 2-speed, writes DVD-RW at maximum 2-speed and writes DVD-RAM at maximum 2-speed.
Specifications for the DVD multi drive are described in table 1-3.
Table 1-3 DVD-Multi drive specifications
Item
ATAPI Burst (MB/sec) 33.3 (Ultra DMA MODE2)
16.6 (PIO MODE4, Multi word MODE2)
Average access time (ms) CD-ROM 150 (typ.)
Data buffer (MB) 2 Speed (Read)r CD-ROM 24x max. (CAV)
DVD-ROM 8x max (CAV)
Speed (Write) CD-R 16x max. (ZCLV)
Supported Format CD: CD-DA, CD-ROM, CD -R, CD-RW
CD-ROMXA Photo CD, Video CD CD-Extra(CD+), CD-text
DVD :DVD-VIDO, DVD-ROM DVD-R (3.9GB, 4.7GB) DVD-RW (Ver.1.1) DVD-RAM (2.6GB, 4.7GB, 9.4GB) DVD+R, DVD+RW
Matsushita
G8CC0001P710
DVD-ROM 180 (typ.)
CD-RW 4x (CLV)
HSRW 4x, 8x (CLV)
DVD-R 1x, 2x (CLV)
DVD-RW 1x, 2x (CLV)
DVD-RAM 2x (ZCLV)

1 Hardware Overview 1.5 TFT Color Display

1.5 TFT Color Display
The TFT color display consists of a LCD module and FL inverter board.
1.5.1 LCD Module
The LCD module used for the TFT color display uses a backlight as the light source and can display images and characters of 262,144 colors with 1024?768 resolution. The video controller is incorporated into the North Bridge chip and can control both internal and external XGA-support displays simultaneously.
Table 1-4 shows the specifications.
Table 1-4 LCD module specifications (TMD-made 12.1 TFT)
Item
Number of Dots Dot spacing (mm) 0.240(H) x 0.240(V)
Display range (mm) 245.76(H) x 184.32(V) Outline dimensions 261.0(w) x 199.0(H) x 5.0Max(D)
Specifications
G33C0000J210
1024(W)?768(H)
1.5 TFT Color Display 1 Hardware Overview
1.5.2 FL Inverter Board
The FL inverter board supplies a high frequency current to illuminate the LCD module FL. Table 1-5 lists the FL inverter board specifications.
Table 1-5 FL inverter board specifications
Item
Input Voltage (V) DC 5
Voltage (Vrms) 750(MAX) Output Current (mArms) 6.0(MAX)
Specifications
G71C00011121

1 Hardware Overview 1.6 Power Supply

1.6 Power Supply
The power supply supplies 19 different voltages to the system board. The power supply micro controller has the following functions.
1. Judges that the DC power supply ( AC adapter) is connected to the computer.
2. Detects DC output and circuit malfunctions.
3. Controls the battery icon, and DC IN icon.
4. Turns the battery charging system on and off and detects a fully charged battery.
5. Turns the power supply on and off.
6. Provides more accurate detection of a low battery.
7. Calculates the remaining battery capacity.
8. Controls the transmission of the status signal of the main battery.
Table 1-6 lists the power supply output specifications.
Table 1-6 Power supply output specifications(1/2)
Name Voltage [V] Use
PPV 1.308-0.748 CPU,GMCH, ICH4 -M
PTV 1.05 CPU, GMCH, ICH4-M 1R35-P1V 1.35 GMCH 1R25-P1V 1.25 DDR-SDRAM termination
MR1R25-
B1V
1R5-P1V 1.5 TV, GMCH, IVH4 -M 1R5-S1V 1.5 ICH4-M 2R5-B2V 2.5 GMCH, DDR-SDRAM
P3V 3.3
E3V 3.3 YEBISUSS, PC Card Power, mini-PCI, MDC
BT-P3V 3.3 Bluetooth
1.25
GMCH, DDR-SDRAM
Clock Generator, Thermal Sensor, GMCH, SDRAM(SPD), TV, IEEE1394, ICH4-M, AD1981B, mini-PCI, EC/KBC, LCD, SD card Power, KINNERTH
S3V 3.3 ICH4-M, EC/KBC, Flash Memory, PSC
P5V 5
CRT, ICH4 -M, FL inverter, LEDs, HDD, ODD, KB, PAD, Bluetooth Power
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