Toshiba satellite m60 Service Manual v2
Toshiba Personal Computer
Satellite M60
Maintenance Manual
TOSHIBA CORPORATION
[CONFIDENTIAL]
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 Personal Computer Satellite M60 Maintenance Manual
First edition May 2005
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 M60 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.
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Satellite M60 Maintenance Manual
Preface
This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer Satellite SATELLITE M60, referred to as the M60 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.
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The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the M60 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
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Satellite M60 Maintenance Manual
Conventions
This manual uses the following formats to describe, identify, and highlight terms and operating
procedures.
Acronyms
On the first appearance and whenever necessary for clarification acronyms are enclosed in
parentheses following their definition. For example:
Read Only Memory (ROM)
Keys
Keys are used in the text to describe many operations. The key top symbol as it appears on the
keyboard is printed in boldface type.
Key operation
Some operations require you to simultaneously use two or more keys. We identify such
operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause
(Break) means you must hold down Ctrl and at the same time press Pause (Break). If three
keys are used, hold down the first two and at the same time press the third.
User input
Text that you are instructed to type in is shown in the boldface type below:
DISKCOPY A: B:
The display
Text generated by the computer that appears on its display is presented in the type face below:
Format complete
System transferred
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Satellite M60 Maintenance Manual
Table of Contents
Chapter 1 Hardware Overview
1.1 Features..............................................................................Error! Bookmark not defined.
1.2 System Unit........................................................................Error! Bookmark not defined.
1.3 2.5-inch Hard Disk Drive...................................................Error! Bookmark not defined.
1.4 Optical device Drives.........................................................Error! Bookmark not defined.
1.4.1 CD-RW & DVD-ROM......................................................Error! Bookmark not defined.
1.4.2 DVD Super Multi Double Layer .......................................Error! Bookmark not defined.
1.5 Power Supply.....................................................................Error! Bookmark not defined.
1.6 Batteries .............................................................................Error! Bookmark not defined.
1.6.1 Main Battery ......................................................................Error! Bookmark not defined.
1.6.2 RTC battery........................................................................Error! Bookmark not defined.
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting Introduction............................................Error! Bookmark not defined.
2.2 Troubleshooting Flowchart................................................Error! Bookmark not defined.
2.3 Power Supply Troubleshooting .........................................Error! Bookmark not defined.
2.4 Display Troubleshooting.......................................……….Error! Bookmark not defined.
2.5 Keyboard Troubleshooting ............................................................................................2-15
2.6 External USB Devices Troubleshooting........................................................................2-17
2.7 TV-Out Failure Troubleshooting...................................................................................2-19
2.8 TouchPad Troubleshooting............................................................................................2-21
2.9 Speaker Troubleshooting............................................................................................... 2-23
2.10 Optical drive troubleshooting..................................................................................2-27
2.11 Modem Troubleshooting................................................................................................2-30
2.12 PCMCIA Troubleshooting............................................................................................. 2-32
2.13 IEEE 1394 Troubleshooting ..........................................................................................2-34
2.14 Wireless LAN Troubleshooting..................................................................................... 2-36
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2.15 Express card troubleshooting....................................................................................2-38
2.16 Bluetooth Troubleshooting………………………………………………….………2-40
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Satellite M60 Maintenance Manual
Chapter 3 Test and Diagnostic Operation Handbook
3.1 The Diagnostic Test.........................................................................................................3-1
3.2 Executing the Diagnostic Test......................................................................................... 3-2
3.3 Config Check Test ...........................................................................................................3-6
3.4 DMI Check Test...............................................................................................................3-7
3.5 PIO Loopback Test..........................................................................................................3-8
3.6 IEEE 1394 Test................................................................................................................3-9
3.7 Speaker Audio Test........................................................................................................ 3-10
3.8 Fan ON/OFF Test .......................................................................................................... 3-11
3.9 Main Battery Charge Test..............................................................................................3-12
3.10 FDD Test........................................................................................................................3-13
3.11 CD-ROM Test................................................................................................................3-14
3.12 Keyboard Test................................................................................................................3-15
3.13 Mouse (Pad) Test...........................................................................................................3-17
3.14 LCD Pixels Mode Test .................................................................................................. 3-19
3.15 Lid Switch Test..............................................................................................................3-20
3.16 HDD R/W Test ..............................................................................................................3-21
3.17 LAN Test ....................................................................................................................... 3-23
3.18 RTC Test........................................................................................................................3-25
3.19 CD Control Button Test.................................................................................................3-26
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Chapter 4 Replacement Procedures
4.1 General ..............................................................................Error! Bookmark not defined.
4.2 Battery...............................................................................Error! Bookmark not defined.
4.3 PC Card .............................................................................Error! Bookmark not defined.
4.4 HDD .................................................................................. Error! Bookmark not defined.
4.5 Optical Drive Module........................................................Error! Bookmark not defined.
4.6 Optical Drive..................................................................... Error! Bookmark not defined.
4.7 Keyboard...........................................................................Error! Bookmark not defined.
4.8 Wireless LAN Unit............................................................ Error! Bookmark not defined.
4.9 Expansion Memory ...........................................................Error! Bookmark not defined.
4.10 Modem...............................................................................Error! Bookmark not defined.
4.11 Display Assembly..............................................................Error! Bookmark not defined.
4.12 Top Cover.......................................................................... Error! Bookmark not defined.
4.13 TouchPad........................................................................... Error! Bookmark not defined.
4.14 Speakers.............................................................................Error! Bookmark not defined.
4.15 System Board ....................................................................Error! Bookmark not defined.
4.16 Fan & CPU........................................................................Error! Bookmark not defined.
4.17 Display Mask.....................................................................Error! Bookmark not defined.
4.18 LCD Module......................................................................Error! Bookmark not defined.
4.19 FL Inverter Board.............................................................. Error! Bookmark not defined.
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Satellite M60 Maintenance Manual
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
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Chapter 1
Hardware Overview
1
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1 Hardware Overview
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1 Hardware Overview
Chapter 1 Contents
1.1 Features......................................................................................................................1-5
1.2 System Unit..............................................................................................................1-10
1.3 2.5-inch Hard Disk Drive.........................................................................................1-12
1.4 Optical device Drives...............................................................................................1-13
1.4.1 CD-RW & DVD-ROM ............................................................................. 1-13
1.4.2 DVD Super Multi Double Layer...............................................................1-14
1.5 Power Supply...........................................................................................................1-15
1.6 Batteries ...................................................................................................................1-17
1.6.1 Main Battery.............................................................................................. 1-18
1.6.2 RTC battery...............................................................................................1-19
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1 Hardware Overview
Figures
Figure 1-1 2.5-inch HDD .............................................................................................. 1-12
Table
Table 1-1 2.5-inch HDD specifications....................................................................... 1-12
Table 1-2 DVD-ROM & CD-RW drive specifications............................................... 1-13
Table 1-3 DVD Super Multi Double Layer drive specifications................................. 1-14
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1.1 Features 1 Hardware Overview
1.1 Features
The Satellite M60 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® Celeron® M Processor 350 or higher
• Intel® Pentium® M Processor 730 or higher
Chipset
• Mobile Intel® 915PM Express Chipset (400/533 MHz FSB supported) for external
graphics controller
• Mobile Intel® 915GM Express Chipset (400/533 MHz FSB supported) for
integrated graphics controller
• Mobile Intel® 910GML Express Chipset (400MHz FSB supported) for integrated
graphics controller
• ATI MOBILITY™ RADEON® X600SE
• ATI MOBILITY™ RADEON® X700
• NVIDIA® GeForce™ GO 6600
• ENE KB910 for Keyboard Controller, Battery management Unit, and RTC
• ENE CB714 controller with Multiple Digital Media Card Slot support
• IEEE 1394 controller
• ALC250 for AC97 CODEC
• Realtek RTL8100CL for 10M/100M LAN or RTL8110SBL for Gigabit LAN
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1 Hardware Overview 1.1 Features
Memory
• DDRII-400/533MHz specification compliant
• Dual channel support
• No On board memory
• Two DDRII SODIMM with 256MB/512MB/1GB ,
• Max. upgrade to 2GB with 2 DDRII SODIMM Socket
BIOS
• MB Flash ROM for system BIOS.
• Suspend to RAM/Disk.
• Password protection (System).
• Various hot key for system control.
• Refreshable
• Complete ACPI 1.0B Function
Power
• 8 cells Li-Ion 18650 size smart battery Pack with 64Wh capacity
• Approximately 4-12 hours or longer charge time to 100% battery capacity with the
system on
• Approximately 4 hours charge time to 100% battery capacity with the system off
• Discharge time in shutdown mode is approximately 1 month
HDD
• 9.5mm, 2.5" HDD up to 120 GB
• Bus Master IDE
• 9.5m/m, 2.5”HDD Support
• Support Ultra 100 synchronous DMA
Fixed Device Drivers
• 5.25” 12.7mm height CD-RW & DVD-ROM dirve
• 5.25” 12.7mm height DVD Super Multi drive
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1.1 Features 1 Hardware Overview
Optional Devices
• 256/512/1024MB SO-DIMM DDRII modules
• Li-ION Battery Pack
• AC adapter
• USB FDD Kit
Keyboard
The computer's keyboard layout is that of a 101/102-key enhanced keyboard.
There are four types of keys: typewriter keys, function keys, soft keys and cursor control
keys. The typewriter keys are gray. The other keys are dark gray.
TouchPad
This pointing control device, located in the center of the keyboard palm-rest, provides
convenient control of the cursor without requiring desk space for a mouse. The TouchPad
incorporates two mouse buttons.
Display
• 17” TFT screen with a resolution of 1440 horizontal x 900 vertical pixels WXGA
• 17” High Brightness TFT screen with a resolution of 1440 horizontal x 900 vertical
pixels WXGA
• 17” TFT screen with a resolution of 1680 horizontal x 1050 vertical pixels
WSXGA+
I/O Ports
• One 15 pins CRT port
• One TV-out (S-Video) port
• One MIC In port
• One headphone-out
• One 2pins AC Adapter Jack
• Type II PCMCIA Card Bus slot with shutter door
• ExpressCard/54 slot with shutter door
• Three 4 pins USB 2.0 ports
• One RJ11 Port
• One RJ45 Port
• One IEEE 1394
• Multiple Digital Media Card Slot with rubber cover
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1 Hardware Overview 1.1 Features
PC Card Slot
• One type II card socket
• 1.8" 10.5mm removable ATA Device
• Card bus card or PC Care with hot insertion and removal
• ACPI 1.1 Compliant.
• Support 5V/3.3V PC Cards and 3.3V Cardbus cards.
• Supports PCMCIA-ATA Specification.
Express Card Slot
• One ExpressCard/54 slot
Multiple Digital Media Card Slot
• ENE CB714 Cardbus/MediaReader Controller
• Support xD, SD, SM, MS, MS Pro and MMC
Communication
• Modem: V90 (V.92)/56K bps specification compliant and 14.4K bps Send/Receive
Fax with MDC solution
• V92/56K bps (US/Canada/UK/GR/FR)
• V90/56K bps (other countries)
• LAN: Realtek 8100CL (On Board 10/100Mbps) RTL8110SBL(BTO)
• WOL from S3 on AC/Battery mode and S4/S5 on AC adapter mode only.
Bluetooth
• Taiyo Yuden V2.0
• Wireless communication killer switch
Wireless LAN
• 802.11g: Atheros (MB43/MB51/MB51L), Intel Calexico2.
• 802.11a/g: Atheros (MB44), Intel Calexico2.
• 802.11a/g+HighBand: Intel Calexico2
• Module integrated for Mini-PCI interface.
• Easy service for WLAN.
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• Wireless communication killer switch (BTO)
• Support MiniPCI IIIB
• Support Intel Wireless Coexistence system with Taiyo Yuden V2.0
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Satellite M60 Maintenance Manual
1.1 Features 1 Hardware Overview
Universal Serial Bus (USB)
The computer has three 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
Windows® Operating System compatible sound system provides internal speakers as
well as jacks for an external microphone and headphone.
TV-out (S-Video) port
Plug a 4-pin S-video cable into this connector for output of NTSC or PAL signal.
LAN port
The computer comes with an RJ-45 Local Area Network (LAN) port. The LAN port
provides connectivity for LAN.
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1 Hardware Overview 1.2 System Unit
1.2 System Unit
The system unit is composed of the following major components:
Processor
• Intel® Celeron® M CPU up to 1.5GHZ 0.09u, 1M L2, FSB 400MHz
• Intel® Pentium® M CPU up to 2.13GHZ 0.09u, 2M L2, FSB 533MHz
• Micro FC-PGA package CPU
System Logic
• Mobile Intel® 915PM Express Chipset (Alviso-PM 400/533MHz FSB supported) /
Mobile Intel® 915GM Express Chipset (Alviso-GM 400/533MHz FSB supported)
or Mobile Intel® 910GML Express Chipset (Alviso-GML 400MHz FSB supported)
• Intel® 82801FBM (ICH6-M)
• ENE KB910 for Keyboard Controller, Battery management Unit, and RTC
• ENE714 for Card Bus PCMCIA, Multiple Digital Media Card Slot.
• TI TSB43AB21A IEEE1394 Controller
• Integrated VGA solution for 915GM/910GML / External VGA card for 915PM
• ALC250 for AC97 Codec
• Marvell 88SA8040 for SATA to PATA HDD support.
• RTL8110SBL for Gigabit LAN / RTL8100CL for 10/100M LAN
Keyboard Controller
• ENE KB910 is use as Keyboard Controller and Battery management unit.
Memory
• On board with two 200-pin +1.8V DDRII SO-DIMM connector, supporting,
DDRII memories card. Maximum up gradable to 2GB by two 1GB SO-module
• Support 64MB/128MB VGA memory for the ATI MOBILITY
X600SE/X700
• Support 64MB/128MB VGA memory for the NVIDIA® GeForce
• Adjustable 128MB UMA VGA memory share from North Bridge
TM
RADEON®
TM
GO 6600
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Satellite M60 Maintenance Manual
1.2 System Unit 1 Hardware Overview
Audio subsystem
• Realtek ALC250 for CODEC
• 20-bit Stereo Digital-to-Analog Converters.
• 18-bit Stereo Analog-to- Digital Converters.
• Built-in 7 Bands of Digital Hardware Equalizer for Optimizing Speaker Response.
• Supports double sampling rate(96KHz) of DVD audio playback.
• Meets Microsoft WHQL/WLP 2.0 audio requirements.
• HRTF 3D positional audio.
• 3D Stereo Enhancement.
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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 2.5inch magnetic disk and mini-Winchester type magnetic heads. The computer supports HDDs up
to 120 GB.
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) 37.26 55.89 74.52 93.15
Logical Blocks (LBA) 78,125,000 117,187,500 156,301,488 195,371,568
Rotational speed (rpm) 4,200/5400 4,200/5400 4200/5400 4200/5400
Toshiba HDD Buffer (MB) 8/16 8/16 8/16 8/16
Hitachi HDD Buffer (MB) 2/8 8/8 8/8 NA/8
Bytes per sector 512 512 512 512
Table 1-1 2.5-inch HDD specifications
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1.4 Optical device Drives 1 Hardware Overview
1.4 Optical device Drives
• DVD-ROM & CD-RW drive
• DVD Super Multi drive
1.4.1 CD-RW & DVD-ROM
The combo 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 10X 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
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 (3.9G,4.7G), DVD-RW
(Ver.1.1), DVD-RAM, DVD+R, DVD+RW, DVD+R DL.
Formats supported
CD:
CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (muitiSession), Video CD, CD-Extra (CD+), CD-Text
Table 1- 2 DVD-ROM & CD-RW drive specifications
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1 Hardware Overview 1.4 Optical device Drives
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 4x speed or Ultra and High speed CD-RW at 10x speed 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 DVDRAM at 3x speed and DVD+R DL at 2.4x 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 (3.9G,4.7G), DVD-RW
(Ver.1.1), DVD-RAM, DVD+R, DVD+RW, DVD+R DL.
Formats supported
CD:
CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (muitiSession), Video CD, CD-Extra (CD+), CD-Text
Table 1- 3 DVD Super Multi Double Layer drive specifications
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Satellite M60 Maintenance Manual
1.5 Power Supply 1 Hardware Overview
1.5 Power Supply
This specification defines the performance and characteristic of 65W and 75W AC adapter power
supply. It supplies a constant voltage 19V output source for M60 series notebook computer.
A/D conversion
• The EC uses 10-bit sampling for A/D conversion to determine the following values:
– AC adaptor current
– 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 m inutes.
– 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.
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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 Lithium-Ion 14.8 V 4300mAH
RTC battery Lithium 3.0 V 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 charge: quick charge when
the system is powered off and normal charge when the system is powered on.
The times required for charges are listed in the table below.
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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1.6 Batteries 1 Hardware Overview
1.6.2 RTC battery
The RTC battery provides power to keep the current date, time and other setup information in
memory while the computer is turned off. The table below lists the charging time and data
preservation period of the RTC battery. The RTC battery is charged by the adaptor or main
battery, while the computer is powered on.
Status Time
Charging Time (power on) About 24 hours
Data preservation period (full charge) 1 month
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