Toshiba tecra a6 Service Manual

Toshiba Personal Computer

Tecra A6

Maintenance Manual

TOSHIBA CORPORATION

[CONFIDENTIAL]

Copyright

© 2006 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 Tecra A6 Maintenance Manual
First edition January 2006

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 A6 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 [CONFIDENTIAL] Tecra A6 Maintenance Manual

Preface

This maintenance manual describes how to perform hardware service maintenance for the Toshiba
Personal Computer Tecra A6, referred to as the A6 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.

Tecra A6 Maintenance Manual [CONFIDENTIAL] iii

The manual is divided into the following parts:

Chapter 1 Hardware Overview describes the A6 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 [CONFIDENTIAL] Tecra A6 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 typeface below:

Format complete
System transferred

Tecra A6 Maintenance Manual [CONFIDENTIAL] v

vi [CONFIDENTIAL] Tecra A6 Maintenance Manual

Table of Contents

Chapter 1 Hardware Overview

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

1.2 System Unit .......................................................................................................................1-6

1.3 2.5-inch Hard Disk Drive ...................................................................................................1-8

1.4 Optical device Drives.........................................................................................................1-9

1.5 Power Supply..................................................................................................................1-12

1.6 Batteries ..........................................................................................................................1-14

Chapter 2 Troubleshooting Procedures

2.1 Troubleshooting Introduction..............................................................................................2-1

2.2 Troubleshooting Flowchart.................................................................................................2-2

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

2.4 Display Troubleshooting...................................................................................................2-12

2.5 Keyboard Troubleshooting...............................................................................................2-15

2.6 External USB Devices Troubleshooting.............................................................................2-17

2.7 TV-Out Failure Troubleshooting.......................................................................................2-19

2.8 Printer Port Troubleshooting.............................................................................................2-21

2.9 TouchPad Troubleshooting...............................................................................................2-23

2.10 Speaker Troubleshooting..................................................................................................2-27

2.11 Optical Drive Troubleshooting..........................................................................................2-29

2.11 Modem Troubleshooting ..................................................................................................2-32

2.12 PCMCIA Troubleshooting...............................................................................................2-34

2.13 IEEE 1394 Troubleshooting .............................................................................................2-36

2.14 Wireless LAN Troubleshooting ........................................................................................2-38

Tecra A6 Maintenance Manual [CONFIDENTIAL] 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 Speaker Audio Test............................................................................................................3-9

3.7 Fan ON/OFF Test ...........................................................................................................3-10

3.8 Main Battery Charge Test.................................................................................................3-11

3.9 FDD Test.........................................................................................................................3-12

3.10 CD-ROM Test.................................................................................................................3-13

3.11 Keyboard Test.................................................................................................................3-14

3.12 Mouse (Pad) Test.............................................................................................................3-16

3.13 LCD Pixels Mode Test.....................................................................................................3-18

3.14 Lid Switch Test ................................................................................................................3-19

3.15 HDD R/W Test................................................................................................................3-20

3.16 LAN Test.........................................................................................................................3-22

3.17 RTC Test.........................................................................................................................3-24

viii [CONFIDENTIAL] Tecra A6 Maintenance Manual

Chapter 4 Replacement Procedures

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

4.2 Battery ...............................................................................................................................4-9

4.3 PC Card..........................................................................................................................4-11

4.4 HDD ...............................................................................................................................4-13

4.5 Expansion Memory..........................................................................................................4-15

4.6 Optical Drive Module.......................................................................................................4-18

4.7 Optical Drive ...................................................................................................................4-20

4.8 Keyboard........................................................................................................................4-22

4.9 Bluetooth module .............................................................................................................4-25

4.10 Wireless LAN Unit ..........................................................................................................4-27

4.11 Modem ............................................................................................................................4-30

4.12 Display Assembly.............................................................................................................4-33

4.13 Top Cover.......................................................................................................................4-35

4.14 Touch Pad.......................................................................................................................4-37

4.15 Direct Play Button Module ...............................................................................................4-39

4.16 Memory ...........................................................................................................................4-41

4.17 System Board..................................................................................................................4-42

4.18 Fan & CPU.....................................................................................................................4-45

4.19 USB Module ...................................................................................................................4-48

4.20 VGA Module...................................................................................................................4-49

4.21 Display Mask...................................................................................................................4-50

4.22 Speakers .........................................................................................................................4-52

4.23 FL Inverter Board............................................................................................................4-53

4.24 LCD Module ...................................................................................................................4-54

Tecra A6 Maintenance Manual [CONFIDENTIAL] 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 [CONFIDENTIAL] Tecra A6 Maintenance Manual

Chapter 1
Hardware Overview

1

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1 Hardware Overview

1-ii

[CONFIDENTIAL]

Tecra A6 Maintenance Manual

1 Hardware Overview

Chapter 1 Contents

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

1.2 System Unit................................................................................................................1-7

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

1.4 Optical device Drives...............................................................................................1-10

1.4.1 DVD-ROM & CD-RW .............................................................................1-10

1.4.2 DVD-ROM................................................................................................1-11

1.4.3 DVD Super Multi Double Layer............................................................... 1-12

1.5 Power Supply...........................................................................................................1-13

1.6 Batteries ...................................................................................................................1-15

1.6.1 Main Battery.............................................................................................. 1-16

1.6.2 RTC battery............................................................................................... 1-17

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1 Hardware Overview

Figures

Figure 1-1 2.5-inch HDD ............................................................... 錯誤! 尚未定義書籤。

Tables

Table 1-1 2.5-inch HDD specifications......................................................................... 1-9

Table 1-2 DVD-ROM & CD-RW drive specifications............................................... 1-10

Table 1-3 DVD-ROM drive specifications.................................................................. 1-11

Table 1-4 DVD Super Multi Double Layer drive specifications................................. 1-12

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Tecra A6 Maintenance Manual

1.1 Features 1 Hardware Overview

1.1 Features

The Tecra A6 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 Pentium M Yonah mobile dual core processor FSB 667MHz, C4E support
(1.66GHz/1.83GHz/2GHz/2.16GHz/2.33GHz and higher with 31W TDP)

• Intel Pentium M Yonah mobile single core processor, FSB 667NHz, C4E support
(1.66GHz/1.83GHz and higher with 31W TDP)

 Chipset

• Intel 945PM with ICH7M (Pentium® M + Extended Graphics model) or Intel
945GM with ICH7M (Pentium® M + Extended Graphics model + Integrated
Graphics model)

• Extended Graphics:

• NVIDIA GeForce Go 7300 (64MB or 128MB)

• Realtek 861 Audio

• TI 7412 for PCMCIA, 6-in 1 Multimedia Card Reader, and IEEE 1394 controller

Intel Enkron-R 10/100 or Intel Vidalia Gigabit for LAN

 Display

• 14” (16:10) TFT screen with a resolution of 1280 horizontal x 800 vertical pixels,
non-CSV normal brightness, WXGA

• 14.1” (16:10) TFT screen with a resolution of 1280 horizontal x 800 vertical pixels,
CSV normal brightness, WXGA

• 14.1” (16:10) TFT screen with a resolution of 1440 horizontal x 900 vertical pixels,
CSV high brightness, WXGA

 Memory

• No on-board memory

• DDR-II 533/667MHz at FCS supported

 ATI Radeon X1300 64MB/128MB
 ATI Radeon X1400 64MB/128MB/256MB
 Nvidia Quadro 64M/128M

• Dual channel support

• Two SODIMM with 256MB/512MB/1GB modules

• Easy upgrade from bottom of the chassis

• Maximum 2GB

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1 Hardware Overview 1.1 Features

 Video RAM

• Up to 128MB integrated solution and shared with main memory for Mobile Intel
945GM Express Chipset

• 128MB, 256MB or 512MB HyperMemory

TM

(64MB or 128MB for local cache) for

ATI MobilityTM Radeon® X1300 with HyperMemoryTM

• 128MB, 256MB or 512MB HyperMemory
cache) for ATI Mobility

TM

Radeon® X1400 with HyperMemoryTM

TM

(64MB, 128MB or 256MB for local

• ATI does not share with main memory

 BIOS

• Phoenix First BIOS

• 1MB Flash ROM for system BIOS

• Suspend to RAM/Disk

• Password protection (Power on, supervisor, HDD)

• Windows 98 ready with PnP

• Various hot keys for system control

• Refreshable

• Complete ACPI 1.0B function

• APM, S4BIOS not supported

• USB memory boot support

• SD memory boot support

 Power

• Universal AC adapter, 90~264VAC, 47~63Hz.

• 6 cells of Li-Ion 18650 size, smart battery pack with 4000mAH x 10.8V (43.2W)

• 9 cells of Li-Ion 18650 size, smart battery pack with 6000mAH x 10.8V (64.8W)

• 12 cells of Li-Ion 18650 size smart battery pack with 8600mAH x 10.8V (92.88W)

• Approximately 12 hours or longer charging time to 100% battery capacity with

 75W with 15V DC (UMA, UMA with docking and Discrete VGA without

docking)

 90W with 15V DC (Discrete VGA with docking)

system switched on.

1-2

• Approximately 4 hours charge time to 100% battery capacity with system switched
off.

• Approximately 2 days discharging time in Standby Mode for the 12-cell battery,

1.5 day for the 9-cell battery and 1 days for 6-cell battery.

• Discharge time in shutdown mode is approximately 1 month

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Tecra A6 Maintenance Manual

1.1 Features 1 Hardware Overview

 HDD

• 9.5mm, 2.5" S-ATA HDD up to 120 GB, 5400rpm

• With 3D shock protection sensor and Dome protection

• Bus master IDE

• SATA1.5G support

 Fixed Device Drivers

• 5.25” 12.7mm height, DVD-ROM & CD-RW combo device

• 5.25” 12.7mm height, DVD-ROM device

• 5.25” 12.7mm height, DVD Super-multi device (DVD-RAM/-R/-RW/+R/+RW)

 Optional Devices

• 256MB/512MB/1024MB SO-DIMM DDR modules

• Intel 945GM for internal graphics, Intel 945 PM for external graphics, daughter

board with ATI M52P/54P or Nvidia G72M

 ATi M52P with 64MB/128MB
 ATi M54P with 64MB/128MB/256MB
 Nvidia G72MV with 64MB/128MB

• Realtek 861 audio controller

• PCIe mini card wireless module (802.11a+b+g Askey WLAN module,

802.11a+b+g Intel WLAN module)

• Dual-band built-in antenna for wireless LAN communication

• MDC Modem

• External PCMCIA form factor remote control devices

• Internal USB interface Bluetooth module V2.0 with EDR

 Keyboard

The computer's keyboard has 85/86 keys and the layouts are compatible with a 101/102­key enhanced keyboard. There are five types of keys: typewriter keys, keypad overlay,
function keys, soft keys and cursor control keys. The typewriter keys and keypad overlay
keys are gray. The other keys are dark gray. The keys have special functions, which is
like G-sensor, TPM, Finger printer and so on.

 Touch Pad

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 Touch
Pad incorporates two mouse (left and right) buttons for universal usage.

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1 Hardware Overview 1.1 Features

 I/O Ports

• Four USB (V2.0) ports

• One DDC2b compliant 15-pin VGA port (RGB)

• One S-Video port

• One microphone port

• One headphone-out jack

• VR volume control

• Wireless communication switch

• FIR

• CIR for 10/10G

• 240-pin connector for advance port replicator III

• One DC-in jack

• One RJ-11 jack for 56kbps V.92 modem

• One RJ-45 jack with LED indicator

• Kensington lock

• One IEEE 1394 port

• Fingerprint authentication

• One 6-in-1 push-push type flash card connector and card reader

• Internal Mic-array

• One type II PCMCIA slot with shutter door

 PCMCIA Card Organization

• One type II card socket with shutter door

• TI 7412 controller

• PC card 95 supported

• No ZV-port support

• SRAM, OTPROM, FLASH ROM, mask ROM memory card up to 64MB

• Modem/LAN card

• CardBus card

• ACPI 1.0B compliant

 Multiple Digital Media Card Slot

• TI 7412 controller

• Supports SD/MMC/MS/MS Pro/xD/mini SD with adapter

• SD-IO supported

• High-speed SD support

• Dummy rubber cover for slot

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Tecra A6 Maintenance Manual

1.1 Features 1 Hardware Overview

 IEEE1394 port

• TI 7412 controller

• Enables high-speed data transfer directly from external device such as digital video

cameras.

 Modem

• Internal modem with MDC solution

• Support for the V.90 or V.92 standards depending on the region and provides a

modem jack for connection to a telephone line.

• Speed of data and fax transfer depends on the analog telephone line conditions.

 Universal Serial Bus (USB)

The computer has four Universal Serial Bus (USB) ports that comply with the USB 2.0
standard, which enable data transfer speeds more than 40 times faster than USB 1.1
(which this computer also supports.) The USB drives may be used to transfer data at low,
full, and high speeds.

 External monitor port

A 15-pin CRT port supporting DDC 2B enables connection of an external monitor, which
is recognized automatically by Video Electronics Standards Association (VESA) Display
Data Channel (DDC) compatible functions.

 Sound system

• Realtek 861 module.

®

• Windows

compatible sound system provides two internal stereo speakers as well

as jacks for an external microphone and headphones.

 LAN port

• 10/100M (Intel Enkron-R) or gigabit LAN (Intel Vidalia)

• The computer comes with an RJ-45 Local Area Network (LAN) port. The computer

has built-in support for Ethernet LAN (10 megabits per second, 10BASE-T), Fast
Ethernet LAN (100 Mbps 100BASE-TX), or Gigabit Ethernet LAN (1000 Mbps,
1000BASE-T).

 Switches

• Power button

• Wireless communication switch

• Toshiba presentation button

• Toshiba Assist button

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1 Hardware Overview 1.1 Features

 Bluetooth module

Some computers in this series are equipped with Bluetooth functionality (Version 2.0 +
EDR) with antenna. Bluetooth is a short-range wireless technology used to create PANs
(Personal Area Networks) among your devices, as well as with other nearby devices such
as cell phones and digital cameras.

 Excellent power management function

• Standby mode, Suspend to RAM or Suspend to disk mode, using time out or hot
key

• HDD local standby mode by time out

• LCD local standby mode by time out

• Low battery alarm by beep

• Auto-backlight off when LCD cover closed

• Full ACPI 1.0B supported

• LCD auto-dim mode by time out

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Tecra A6 Maintenance Manual

1.2 System Unit 1 Hardware Overview

1.2 System Unit

The system unit is composed of the following major components:

 Processor (depending on the model you purchased)

• Intel Pentium M Yonah mobile dual core processor T2300/T2400/T2500/T2600

• Intel Pentium M Yonah mobile single core processor T1300/T1400

 System Logic

• Intel 945PM with ICH7M (Pentium® M + Extended Graphics model) or Intel
945GM with ICH7M (Pentium® M + Extended Graphics model + Integrated
Graphics model)

• Extended Graphics:

 ATI Radeon X1300 64MB/128MB
 ATI Radeon X1400 64MB/128MB/256MB
 Nvidia Quadro 64M/128M

• NVIDIA GeForce Go 7300 (64MB or 128MB)

• Realtek 861 Audio

• TI 7412 for PCMCIA, 6-in 1 Multimedia Card Reader, and IEEE 1394 controller

Intel Enkron-R 10/100 or Intel Vidalia Gigabit for LAN

• PCI express

• Power management functions

• Supports DMI

 Memory

• No on-board memory

• ROM BIOS for system

• 1MB Flash ROM

• DDR-II 533/667MHz at FCS supported

• Dual channel support

• Easy upgrade (Maximum 2GB) from bottom of the chassis

• Two JEDEC standard 200-pin, 1.8V DDR II SO-DIMM memory support for

256MB/512MB/1024MB/2048MB.

• Slot: 2 SO-DIMM up to 1GB can be upgraded through memory expansion slot.
You need to remove existing SO-DIMM if SO-DIMM is installed in memory
expansion slot. Maximum upgradeable system memory depends on the model.

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1 Hardware Overview 1.2 System Unit

 Video RAM

• Up to 128MB integrated solution and shared with main memory for Mobile Intel
945GM Express Chipset

• 128MB, 256MB or 512MB HyperMemory
ATI Mobility

TM

Radeon® X1300 with HyperMemoryTM

• 128MB, 256MB or 512MB HyperMemory
cache) for ATI Mobility

TM

Radeon® X1400 with HyperMemoryTM

TM

(64MB or 128MB for local cache) for

TM

(64MB, 128MB or 256MB for local

• ATI does not share with main memory

 Audio subsystem

• Realtek 861 Audio

− Microphone-in and headphone-out

− Internal Microphone array

− Two stereo speakers

− Sound effect by SRS software

− Driver level support for all applications by Toshiba virtual sound

− Volume control: Dial type for Win XP

− Stereo speakers with box or Harman/kardon(Odessey2)

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Tecra A6 Maintenance Manual

1.4 Optical device Drives 1 Hardware Overview

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 up to
120G HDD.

The HDD is shown in Figure 1-1. Specifications are listed in Table 1-1.

Figure 1-1 2.5-inch HDD

Items 40GB 60GB 80GB 100GB 120GB

Formatted
capacity (GB)
Logical Blocks
(LBA)
Rotational
speed (rpm)
Toshiba HDD
Buffer (MB)
Hitachi HDD
Buffer (MB)
Fujitsu HDD
Buffer (MB)

37.26 55.89 74.52 93.15 111.8

78,125,000 117,187,500 156,301,488 195,371,568 234,441,648

5400 5400/7200 5400/7200 5400/7200 5400

16 16/NA 16/NA 16/NA 8

8 8/8 8/8 8/8 NA

8 8 8 8 NA

Bytes per sector 512 512 512 512 512

Table 1-1 2.5-inch HDD specifications

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1 Hardware Overview 1.4 Optical device Drives

1.4 Optical device Drives

1.4.1 DVD-ROM & CD-RW

The DVD-ROM and CD-RW drive accepts 12-cm (4.72-inch) and 8-cm (3.15-inch) discs. At
maximum, the drive can play back a DVD at 8x speed, read CD-ROM at 24x speed, and write
CD-R at 24x speed and CD-RW at 4x speed or High speed CD-RW at 24X or Ultra speed CD­RW at 24X speed.

The specifications of the DVD-ROM & CD-RW drive are listed in Table 1-2.

Item DVD-ROM mode CD-ROM mode

Data transfer rate (Mbytes/s)

Access time (ms)

Average random access

33.3 (U-DMA transfer mode 2)

16.6 (PIO mode 4, Multiword DMA mode 2)
180 150

Data buffer size (Mbytes) 2MB

DVD:

DVD-VIDEO, DVD-ROM

Formats supported

CD:

CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (single/multi-session), CD-EXTRA, CD-Text

Table 1-2 DVD-ROM & CD-RW drive specifications

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Tecra A6 Maintenance Manual

1.4 Optical device Drives 1 Hardware Overview

1.4.2 DVD-ROM

The DVD-ROM drive accepts 12-cm (4.72-inch) and 8-cm (3.15-inch) discs. At maximum, the
drive can play back a DVD at 8x speed, and read CD-ROM at 24x speed.

The specifications of the DVD-ROM drive are listed in Table 1-3

Item DVD-ROM mode CD-ROM mode

Data transfer rate (Mbytes/s)

Access time (ms)

Average random access

33.3 (U-DMA transfer mode 2)

16.6 (PIO mode 4, Multiword DMA mode 2)
180 150

Data buffer size (Mbytes) 256 KB

DVD:

DVD-VIDEO, DVD-ROM

Formats supported

CD:

CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (single/multi-session), CD-EXTRA, CD-Text

Table 1-3 DVD-ROM drive specifications

.

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1 Hardware Overview 1.4 Optical device Drives

1.4.3 DVD Super Multi Double Layer

The DVD Super Multi drive accepts 12-cm (4.72-inch) and 8-cm (3.15-inch) discs. At maximum,
the drive can play back a DVD at 8x speed, read CD-ROM at 24x speed, and write CD-R at 24x
speed and CD-RW at 10x and DVD-R at 8x speed and DVD-RW at 4x speed and DVD+R at 8x
speed and DVD+RW at 4x speed and DVD-RAM at 5x speed and DVD+R DL at 2.4x speed and
DVD-R DL at 2x speed.

The specifications of the DVD Super Multi Double Layer drive are listed in Table 1-4

Item DVD-ROM mode CD-ROM mode

Data transfer rate (Mbytes/s)

Access time (ms)

Average random access

33.3 (U-DMA transfer mode 2)

16.6 (PIO mode 4, Multiword DMA mode 2)
180 150

Data buffer size (Mbytes) 2MB

DVD:

DVD-VIDEO, DVD-ROM, DVD-R, DVD-RW, DVD-RAM,
DVD+R, DVD+RW, DVD+R DL, DVD-R DL

Formats supported

CD:

CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (single/multi-session), CD-EXTRA, CD-Text

Table 1-4 DVD Super Multi Double Layer drive specifications

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Tecra A6 Maintenance Manual

1.5 Power Supply 1 Hardware Overview

1.5 Power Supply

This specification defines the performance and characteristics of the 75W AC adapter power
supply. It supplies a constant voltage 15V output source for Tecra A6 series notebook computer.

 A/D conversion

• The EC uses 10-bit sampling for A/D conversion to determine the following values:
– Battery and temperature

 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

 Abnormal check

• The EC determines whether the condition is abnormal, and if so, stores an error

code into the error register.

 Input port management

• The EC monitors the following input signal status:
– System power ON/OFF status
– Direct CD power ON/OFF status

 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.

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

 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

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1 Hardware Overview 1.5 Power Supply

 Battery charging control

• The EC controls the following.
– The quick charging ON/OFF
– The detection of full charge

 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.

 New battery installation

• When a new battery is installed, the EC communicates with the E

2

PROM in the

battery to read information of the newly installed battery.

 Battery capacity calculation

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

SMBus.

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Tecra A6 Maintenance Manual

1.6 Batteries 1 Hardware Overview

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 Material Output voltage Capacity

Main battery (6 cell) Lithium-Ion 10.8V 4000 mAh
Main battery (9 cell) Lithium-Ion 10.8V 6000 mAh
Main battery (12 cell) Lithium-Ion 10.8V 8600 mAh
RTC battery Lithium 3.0V 15 mAh

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1 Hardware Overview 1.6 Batteries

1.6.1 Main Battery

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 charges: 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.

Status Charging time

Normal charge (power on) 12 hours or longer
Quick charge (power off) About 4 hours

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.

 Detection of full charge

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

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Tecra A6 Maintenance Manual