Toshiba satellite a200 Service Manual

Toshiba Personal Computer

Satellite A200

Maintenance Manual

TOSHIBA CORPORATION

[CONFIDENTIAL]

Copyright

© 2007 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 A200 Maintenance Manual
First edition March 2007

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 A200 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]

Satellite A200 Series Maintenance Manual

Preface

This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer Satellite A200, referred to as the M100 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 A200 Series Maintenance Manual

[CONFIDENTIAL]

iii

The manual is divided into the following parts:

Chapter 1 Hardware Overview describes the M100 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

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

iv

[CONFIDENTIAL]

Satellite A200 Series Maintenance Manual

Some operations require you to simultaneously use two or more keys. We identify such
operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause
(Break) means you must hold down Ctrl and at the same time press Pause (Break). If three
keys are used, hold down the first two and at the same time press the third.

User input

Text that you are instructed to type in is shown in the boldface type below:

DISKCOPY A: B:

The display

Text generated by the computer that appears on its display is presented in the typeface below:

Format complete
System transferred

Satellite A200 Series Maintenance Manual

[CONFIDENTIAL]

v

Table of Contents

Chapter 1 Hardware Overview

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

1.2 System Unit......................................................................................................................1-5

1.3 2.5-inch Hard Disk Drive.................................................................................................1-6

1.4 Optical device Drives.......................................................................................................1-8

1.5 Power Supply .................................................................................................................1-10

1.6 Batteries..........................................................................................................................1-12

Chapter 2 Troubleshooting Procedures

2.1 Troubleshooting Introduction...........................................................................................2-3

2.2 Troubleshooting Flowchart ............................................2-Error! Bookmark not defined.

2.3 Power Supply Troubleshooting........................................................................................2-9

2.4 Display Troubleshooting...................................……….2-Error! Bookmark not defined.

2.5 Keyboard Troubleshooting.............................................................................................2-17

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

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

2.8 TouchPad Troubleshooting ............................................................................................2-23

2.9 Speaker Troubleshooting................................................................................................2-25

2.10 Optical drive troubleshooting.................................................................................……2-27

2.11 Modem Troubleshooting................................................................................................2-30

2.12 Express card Troubleshooting........................................................................................2-32

2.13 IEEE 1394 Troubleshooting...........................................................................................2-34

2.14 Wireless LAN Troubleshooting.....................................................................................2-36

2.15 Camera Troubleshooting.............................................................................................. 2-38

2.16 Bluetooth Troubleshooting…………………...…………………………….………… 2-40

2.17 4 in 1 card Troubleshooting……………………………………………………..……..2-42

2.18 1st HDD Troubleshooting………………………………………………………………2-44

2.19 2nd HDD Troubleshooting……………………………………..…………………….....2-46

vi

[CONFIDENTIAL]

Satellite A200 Series Maintenance Manual

Chapter 3 Tests and Diagnostics

3.1 The Diagnostic Test…………………………………….……...………………………..3-3

3.2 Executing the Diagnostic Test…………………………………………………………..3-5

3.3 Display Configuration…………………….……………………………………………..3-9

3.4 Speaker Audio Test……………………………………………………………………..3-10

3.5 Fan ON/OFF Test………………………………………………………….……………3-11

3.6 Main Battery Charge Test………………………………………………….…………...3-12

3.7 FDD Test………………………………………………………………….…………….3-13

3.8 ODD Test………………………………………………………………….……………3-14

3.9 Keyboard Test………………………………………………………….……………….3-15

3.10 Mouse (Pad) Test………………………………...…………………….………………3-17

3.11 LCD Pixels Mode Test…………………………...………………….…………………3-19

3.12 Magnetic switch Test……………...…………………………………….……………..3-20

3.13 LAN Test…………………………………………………….……………..…………..3-21

3.14 RTC Test………………………………………………….………..…………………..3-24

3.15 Read 1394 GUID……………………………………….……………..……………….3-25

3.16 Speaker EQ Type Check&Re-Write…………………………….……………………...3-26

3.17 Button Test……………………………………………………….……………………..3-27

3.18 1st HDD Test…………………………………….………….…………………………..3-28

3.19 2nd HDD Test…………………………………..……………………………………….3-31

3.20 Satellite LED Test………………………………………………………………………3-34

Chapter 4 Replacement Procedures

4.1 General
………………………………………………………………………………..Error

! Bookmark not defined.

4.2 Battery
………………………………………………………………………………...Erro

r! Bookmark not defined.

4.3 PC Card
……………………………………………………………………………….Error!

Bookmark not defined.

Satellite A200 Series Maintenance Manual

[CONFIDENTIAL]

vii

4.4 Memory Card

.... ………………………………………………………………………..Error!

Bookmark not defined.

4.5 HDD

…………………………………………………………………………………Erro

r! Bookmark not defined.

4.6 Expansion Memory

………………………………………………………………….Error! Bookmark

not defined.

4.7 Optical Drive Module

……………………………………………………………….Error! Bookmark

not defined.

4.8 Optical Drive
... ………………………………………………………………………...Error!

Bookmark not defined.

4.9 Keyboard

…………………………………………………………………………….Error!

Bookmark not defined.

4.10 Display Assembly

.......... ……………………………………………………………………Error!

Bookmark not defined.

4.11 Display Mask
... ………………………………………………………………………...Error!

Bookmark not defined.

4.12 FL Inverter Board

.......... ……………………………………………………………………Error!

Bookmark not defined.

4.13 LCD Module
.. …………………………………………………………………………Error!

Bookmark not defined.

4.14 WLAN antennas

........ ……………………………………………………………………..Error!

Bookmark not defined.

4.15 Camera and Microphone

…………………………………………………………….Error! Bookmark not

defined.

4.16 Bluetooth module

.......... ……………………………………………………………………Error!

Bookmark not defined.

viii

[CONFIDENTIAL]

Satellite A200 Series Maintenance Manual

4.17 Touch Pad
……………………………………………………………………………Error!

Bookmark not defined.

4.18 Fingerprint Module

.............…………………………………………………………………..Error!

Bookmark not defined.

4.19 Speakers
……………………………………………………………………………...Error!

Bookmark not defined.

4.20 Function Button Board
………………………………………………………………Error! Bookmark

not defined.

4.21 USB Board
.…………………………………………………………………………..Error!

Bookmark not defined.

4.22 MDC Card

…………………………………………………………………………...Error!

Bookmark not defined.

4.23 Wireless Module

..........…………………………………………………………………….Error!

Bookmark not defined.

4.24 System Fan
.…………………………………………………………………………..Error!

Bookmark not defined.

4.25 System Board

.....………………………………………………………………………..Error!

Bookmark not defined.

4.26 VGA Board
..………………………………………………………………………….Error!

Bookmark not defined.

4.27 CPU
…………………………………………………………………………………Erro

r! Bookmark not defined.

Appendices

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

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

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

Satellite A200 Series Maintenance Manual

[CONFIDENTIAL]

ix

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]

Satellite A200 Series Maintenance Manual

Chapter 1
Hardware Overview

1

[CONFIDENTIAL]

1 Hardware Overview

1-ii Minnesota 10M/10MG Series Maintenance Manual

1 Hardware Overview

Chapter 1 Contents

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

1.2 System Unit................................................................................................................1-5

1.3 2.5-inch Hard Disk Drive...........................................................................................1-6

1.4 Optical device Drives.................................................................................................1-8

1.5 Power Supply...........................................................................................................1-10

1.6 Batteries ...................................................................................................................1-12

Minnesota 10M/10MG Series Maintenance Manual

1-iii

1 Hardware Overview

Figures

Figure 1-1 2.5-inch HDD ................................................................................................ 1-6

Tables

Table 1-1 2.5-inch HDD specifications ......................................................................... 1-6

Table 1-2 DVD-ROM & CD-RW drive specifications................................................. 1-8

Table 1-3 DVD Super Multi Double Layer drive specifications................................... 1-9

Table 1-4 Battery specifications .................................................................................. 1-12

1-iv Minnesota 10M/10MG Series Maintenance Manual

1.1 Features 1 Hardware Overview

1.1 Features

The Minnesota 10M/10MG 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® CoreTM 2 Duo Processor

TM

• Intel® Core

• Intel® Pentium® Dual Core Processor

• Intel® Celeron® M Processor

 Chipset

• Mobile Intel® 945PM Express Chipset

• Mobile Intel® 945GM Express Chipset

• Mobile Intel® 943GML Express Chipset

Duo Processor

 Memory

• Two DDRII SO-DIMM, up to 4GB with Intel 945PM/GM Chipset or up to 2GB

with Intel 943GML Chipset

 BIOS

• 1024MB Flash ROM for system BIOS

• Suspend to RAM/Disk

• Password protection

• Various hot key for system control

• Refreshable

• Complete ACPI 2.0 function

• SMBIOS V2.4

• Supports JSB memory Boot, USB Super Fetch, SD Super Fetch

– Power on password
– Supervisor password
– HDD password for WW
– No HDD password for JP

 Power

• Universal AC adapter, 90~264VAC, 47~63Hz.
 Offers constant voltage 19V output source with 65W max output power

capacity for Minnesota 10M

 Offers constant voltage 19V output source with 75W max output power

capacity for Minnesota 10M

 Offers constant voltage 19V output source with 90W max output power

capacity for Minnesota 10MG

Minnesota 10M/10MG Series Maintenance Manual

1-1

1 Hardware Overview 1.1 Features

• 3 cells of Li-Ion 18650 size, smart battery pack with 2000mAH x 10.8V (21.6W)

• 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)

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

system switched on.

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

switched off.

• Discharge time in shutdown mode is approximately 1 month

 HDD

• One/Dual 2.5", 9.5/12.5mm Hard Disk, up to 400GB (200GB+200GB)

• SATA 1.5Gb/s

• 9.5/12.5mmH, 2.5” SATA HDD Support

 VGA

• Intel® 945GM for Integrated Graphics

• Intel® 943GML for Integrated Graphics

• nVIDIA GeForce® Go 7300

 Fixed Optical drive

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

• 12.7mm height, DVD Super-multi device

• 12.7mm height, DVD Super-multi device with Label Flash

 Optional Devices

• Express Card

• Build-in antenna for wireless LAN module

• Build-in antenna for Bluetooth module

• MDC Modem

 Keyboard

• 86/87 keys

• Standard pitch 19.05mm, 2.5±0.3mm travel length

• Windows key, Application key

• Vista key supported

 Touch Pad with Two Buttons

• Left button

• Right button

 I/O Ports

• Four USB (V2.0) ports

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

• One S-Video port

1-2 Minnesota 10M/10MG Series Maintenance Manual

1.1 Features 1 Hardware Overview

• One microphone port

• One headphone-out jack

• Digital/Rotary volume control

• Wireless communication switch

• One DC-in jack

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

• One RJ-45 jack with LED indicator

• Kensington lock

• One IEEE 1394a port

• Fingerprint authentication

• One 4-in-1 push-push type flash card connector and card reader

• Built-in camera with microphone

• One type II PCMCIA slot with shutter door

• One SIM card reader

 Express Card Slot

• TI 8402 card bus controller for the model with Bridge media slot

• PC Card 95 supported with one Type II Card socket

• With Shutter door

• No ZV-Port support

 Wireless LAN module

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

• WLAN module b/g, a/b/g, and a/b/g/n

 5 in 1 Card Reader Organization

• TI 8402 controller

• SD, miniSD, MMC, Memory Stick/PRO, and xD card supported

• ACPI 2.0 compliant

 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 2.0 supported

• LCD auto-dim mode by time out

Minnesota 10M/10MG Series Maintenance Manual

1-3

1 Hardware Overview 1.1 Features

 Switches

• Power button

• Two programmable launch buttons

• Four control buttons for CD playing

• Wireless communication switch

 Security

• Fingerprint authentication

 AC Adapter

• Universal AC adapter module

• Liteon & Delta 65W, 75W and 90W adapters

• Output voltage: 19Vdc

• Input Voltage/Frequency range: 90-264Vac, 47-63Hz

 Display

• 15.4” (16:10) TFT screen with a resolution of 1280 horizontal x 800 vertical

pixels, CSV VA, high brightness approximately 200nits, WXGA

• 15.4” (16:10) TFT screen with a resolution of 1280 horizontal x 800 vertical

pixels, CSV, brightness approximately 150nits, WXGA

 Video RAM

• NVIDIA GeForce® Go 7300, up to 256MB VRAM (GDDR2)

 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.

 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.

 OS

• Windows Vista Home Basic/ Home Premium (32/64 bit support)

• Windows Vista Business (32/64 support)

• Vista Premium Logo

1-4 Minnesota 10M/10MG Series Maintenance Manual

1.2 System Unit 1 Hardware Overview

1.2 System Unit

The system unit is composed of the following major components:

 Processor

• Intel® CoreTM 2 Duo Processor
T7600/T7400/T7200/T5600/T5500/T5300/T5200

• Intel® CoreTM Duo Processor T2450/T2350

• Intel® Pentium® Dual Core Processor T2080/T2060

• Intel® Celeron® M Processor 530/520

 System Logic

• Mobile Intel® 945PM with ICH7M Chipset

• Mobile Intel® 945PM with ICH7M Chipset

• Mobile Intel® 943GML with ICH7M Chipset

 Memory

• Two DDR-II 533/667MHz SO-DIMM

• Supports Dual channel

• Up to 2GB with 256MB/512MB/1GB module for Intel

945PM/945GM/943GML Chipset

• Up to 4GB with 2GB module for Intel 945PM/945GM Chipset

 Video RAM (Depending on the model you purchased)

• nVIDIA GeForce® Go 7300, up to 256MB VRAM (GDDR2)

 Audio subsystem

• Realtek High Definition Audio Codec ALC861

− Microphone-in and headphone-out

− Volume control: Digital control, rotary type, without mute function

− Supports Microsoft Outlook Express audio

Minnesota 10M/10MG Series Maintenance Manual

1-5

1 Hardware Overview 1.3 2.5-inch Hard Disk Drive

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 250G 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

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

78,140,160 117,210,240 156,301,488 195,371,568

5400 5400 5400 5400

8 8 8 8

8 8 8 8

8 8 8 8

Bytes per sector 512 512 512 512

Table 1-1 2.5-inch HDD specifications

1-6 Minnesota 10M/10MG Series Maintenance Manual

1.3 2.5-inch Hard Disk Drive 1 Hardware Overview

Items 120GB 160GB 200GB 250GB

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

111.8 149.05 186.31 232.89

234,441,648 312,581,808 390,720,968 488,397,168

5400 5400/4200 5400/4200 4200

8 8 8 N/A

8 8 N/A N/A

8 8 8 8

Bytes per sector 512 512 512 512

Table 1-1 2.5-inch HDD specifications (Continued)

Minnesota 10M/10MG Series Maintenance Manual

1-7

1 Hardware Overview 1.4 Optical Disc Device

1.4 Optical Disc Device

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 high speed CD-RW at 10x speed or Ultra speed CD-RW 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

Data buffer size (Mbytes) 2MB

Formats supported

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

33.3 (U-DMA transfer mode 2)

16.6 (PIO mode 4, Multiword DMA mode 2)
150 130

DVD:

DVD-VIDEO, DVD-ROM

CD:

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

1-8 Minnesota 10M/10MG Series Maintenance Manual

1.4 Optical Disc Device 1 Hardware Overview

1.4.2 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 1-3.

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)
130 130

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 1-3 DVD Super Multi Double Layer drive specifications

Minnesota 10M/10MG Series Maintenance Manual

1-9

1 Hardware Overview 1.5 Power Supply

1.5 Power Supply

This specification defines the performance and characteristics of the 65W, 75W, 90W, and
120W AC adapter power supply. It supplies a constant voltage 19V output source for the
Minnesota 10M/10MG Series Personal Computer.

 A/D conversion

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

values:

– Battery and temperature

 AC adapter and battery check

• The EC checks the following by A/D converted values:
– Battery installed

• The EC checks the following by GPIO values:
– AC adapter 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: blue)

• Blue: indicates AC adapter is connected
– Battery LED (two colors: orange and blue)

• Blue 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

1-10 Minnesota 10M/10MG Series Maintenance Manual

1.5 Power Supply 1 Hardware Overview

 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 E2PROM 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.

Minnesota 10M/10MG Series Maintenance Manual

1-11

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 adapter
is not attached.

The battery specifications are listed in the table below.

Battery name Material Output voltage Capacity

Main battery (3 cells) Lithium-Ion 10.8V 2000mAH
Main battery (6 cells) Lithium-Ion 10.8V 4000mAH
Main battery (9 cells) Lithium-Ion 10.8V 6000mAH
RTC battery (Maxell

ML1220T10)
RTC battery (Maxell

ML1220HT10)
RTC battery (Sanyo

ML1220T28)
RTC battery (Panasonic

ML1220/B)

Lithium-Ion 3.0V 14 mAH

Lithium-Ion 3.0V 18 mAH

Lithium-Ion 3.0V 15 mAH

Lithium-Ion 3.0V 17 mAh

Table 1-4 Battery specifications

1-12 Minnesota 10M/10MG Series Maintenance Manual

1.6 Batteries 1 Hardware Overview

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 adapter and battery are attached to the computer. The
system charges the battery using quick charge or trickle charge.

 Quick Battery Charge

When the AC adapter 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 adapter 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.

Minnesota 10M/10MG Series Maintenance Manual

1-13

1 Hardware Overview 1.6 Batteries

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 adapter or main
battery, while the computer is powered on.

Status Time

Charging Time (power on) About 24 hours
Data preservation period (full charge) 1 month

1-14 Minnesota 10M/10MG Series Maintenance Manual

Chapter 2
Troubleshooting Procedures

2