Toshiba satellite m70 pro, satellite m70 Service Manual
Toshiba Personal Computer
Satellite M70 /Satellite Pro M70
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 M70 /Satellite Pro M70 Maintenance Manual
First edition September 2004
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 A80/A85 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 M70 /Satellite Pro M70 Maintenance Manual
Preface
This maintenance manual describes how to perform hardware service maintenance for the Toshiba
Personal Computer Satellite SATELLITE M70 /SATELLITE PRO M70, referred to as the A80/A85
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 M70 /Satellite Pro M70 Maintenance Manual [CONFIDENTIAL]
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The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the A80/A85 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] Satellite M70 /Satellite Pro M70 Maintenance Manual
Conventions
This manual uses the following formats to describe, identify, and highlight terms and operating
procedures.
Acronyms
On the first appearance and whenever necessary for clarification acronyms are enclosed in parentheses
following their definition. For example:
Read Only Memory (ROM)
Keys
Keys are used in the text to describe many operations. The key top symbol as it appears on the
keyboard is printed in boldface type.
Key operation
Some operations require you to simultaneously use two or more keys. We identify such operations by
the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause (Break) means you
must hold down Ctrl and at the same time press Pause (Break). If three keys are used, hold down
the first two and at the same time press the third.
User input
Text that you are instructed to type in is shown in the boldface type below:
DISKCOPY A: B:
The display
Text generated by the computer that appears on its display is presented in the type face below:
Format complete
System transferred
Satellite M70 /Satellite Pro M70 Maintenance Manual [CONFIDENTIAL]
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vi [CONFIDENTIAL] Satellite M70 /Satellite Pro M70 Maintenance Manual
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................................................................................................... 1-9
1.4 Removable Drives............................................................................................................ 1-10
1.5 Power Supply.................................................................................................................. 1-16
1.6 Batteries.......................................................................................................................... 1-18
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 ................................................................................................. 2-25
2.11 Optical Drive Troubleshooting.......................................................................................... 2-27
2.12 Modem Troubleshooting.................................................................................................. 2-30
2.13 PCMCIA Troubleshooting............................................................................................... 2-32
2.14 IEEE 1394 Troubleshooting............................................................................................. 2-34
2.15 Wireless LAN Troubleshooting........................................................................................ 2-36
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Chapter 3 Tests and Diagnostics
3.1 The Diagnostic Test............................................................................................................3-1
3.2 Executing the Diagnostic Test..............................................................................................3-2
3.3 Config Check Test .............................................................................................................3-6
3.4 DMI Check Test................................................................................................................3-7
3.5 PIO Loopback Test...........................................................................................................3-8
3.6 IEEE 1394 Test .................................................................................................................3-9
3.7 Speaker Audio Test .........................................................................................................3-10
3.8 Fan ON/OFF Test...........................................................................................................3-11
3.9 Main Battery Charge Test.................................................................................................3-12
3.10 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
viii [CONFIDENTIAL] Satellite M70 /Satellite Pro M70 Maintenance Manual
Chapter 4 Replacement Procedures
4.1 General ..............................................................................................................................4-1
4.2 Battery.............................................................................................................................. 4-7
4.3 PC Card............................................................................................................................ 4-9
4.4 HDD............................................................................................................................... 4-11
4.5 Optical Drive Module ...................................................................................................... 4-13
4.6 Optical Drive ................................................................................................................... 4-15
4.7 Wireless LAN Unit .......................................................................................................... 4-17
4.8 Expansion Memory.......................................................................................................... 4-20
4.9 Keyboard........................................................................................................................ 4-23
4.10 Modem........................................................................................................................... 4-26
4.11 Display Assembly ............................................................................................................ 4-28
4.12 Touch Cover ................................................................................................................... 4-31
4.13 Touch Pad....................................................................................................................... 4-34
4.14 Speakers......................................................................................................................... 4-36
4.15 System Board.................................................................................................................. 4-37
4.16 Fan, Heat Sink, & CPU................................................................................................... 4-39
4.17 Display Mask .................................................................................................................. 4-42
4.18 LCD Module................................................................................................................... 4-44
4.19 FL Inverter Board............................................................................................................ 4-47
Satellite M70 /Satellite Pro M70 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
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Chapter 1 Hardware Overview
1
[CONFIDENTIAL]
1 Hardware Overview
1-ii [CONFIDENTIAL] Satellite M70 /Satellite Pro M70 Series Maintenance Manual
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 drive supporting ±R 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 SATA HDD specifications.............................................................1-12
Table 1-2 2.5-inch PATA HDD specifications.............................................................1-12
Table 1-3 DVD-ROM & CD-RW drive specifications ................................................1-13
Table 1-4 DVD Super Multi Double Layer drive specifications..................................1-14
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1.1 Features 1 Hardware Overview
1.1 Features
The Satellite M70 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 350J/360J/370/380
? Intel® Pentium® M Processor 725A/730/740/750/760/770/780
? Chipset
? ATI Radeon® Xpress 200M +ATI IXP450
? Mobile Intel® 915PM Express Chipset for external graphics controller
? Mobile Intel® 915GM Express Chipset for integrated graphics controller
(Chipset depends on the model you purchased)
? ATI Mobility® Radeon® X600SE
? ATI Mobility® Radeon® X7 00
(GPU depends on the models you purchased)
? ENE KB910 for Keyboard Controller, Battery management Unit, and RTC.
? ENE CB1410 for PCMCIA controller
? TI PCI7411 Multiple Digital Media Card Slot, IEEE 1394 and PCMCIA Controller
? TI PCI4510, IEEE1394 and PCMCIA Controller
? Realtek ALC250 for AC97 CODEC.
? Realtek RTL8100CL for 10M/100M LAN
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1 Hardware Overview 1.1 Features
? Memory
? DDRII-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
? 1MB 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
? 4-cell Lithium Ion smart battery pack with 14.4V*2000mAh
? 6-cell Lithium Ion smart battery pack with 10.8V*4000mAh
? 8-cell Lithium Ion smart battery pack with 14.4V*4300mAh
? Approximately 12 hours or longer charging time to 100% battery capacity with
? Approximately 3 hours charge time to 100% battery capacity with system switc hed
? Approximately 1.5 days discharging time in Standby Mode for the 8-cell battery, 1
? Discharge time in shutdown mode is approximately 1 month
? HDD
? 9.5mm, 2.5" HDD up to 120 GB
? Bus Master ID E
? 9.5m/m, 2.5”HDD Support
? Serial ATA and Parallel ATA
system switched on.
off.
day for the 6-cell battery and 0.75 days for 4-cell battery.
? Fixed Device Drivers
? 5.25” 12.7mm height CD-RW & DVD-ROM drive
? 5.25” 12.7mm height DVD Super Multi drive supporting ±R Double Layer
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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 ke ys 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
? 15.4” TFT screen with a resolution of 1280 horizontal x 800 vertical pixels WXGA
150nits
? 15.4” TFT screen with a resolution of 1280 horizontal x 800 vertical pixels WXGA
150nits CSV
? 15.4” TFT screen with a resolution of 1280 horizontal x 800 vertical pixels WXGA
200nits
? 15.4” TFT screen with a resolution of 1280 horizontal x 800 vertical pixels WXGA
200nits CSV
? I/O Ports
? USB (V2.0, horizontal type) x 3 (2 in rear side, 1 in left side )
? RGB; One DDC2b compliant VGA port , 15pins (left side)
? S-Video (left side)
? Microphone jack (front side)
? Headphone jack (front side)
? VR volume control (front side)
? Wireless Communication Switch and WLAN indicator (some models may not have
this feature).
? DC-In jack (rear side)
? RJ-11 jack for 56Kbps V.92 Modem (rear side)
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1 Hardware Overview 1.1 Features
? RJ-45 jack with LED indicator (rear side)
? Kensington lock (rear side)
? IEEE 1394
? 5 in 1 Card reader (front side)
? ExpressCard (some models may not have this feature).
? PCMCIA with shutter door (Left side)
? 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 Express Cardslot (some models may not have this feature).
? Multiple Digital Media Card Slot
? Supports xD, SD, 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.
? Wireless LAN
? 802.11g: WLL3092-D4(MOW-LF) 54M 11/13CH (MB51L) (RoHS).
? 802.11a+g: Atheros WLL4071-D4(MOW) 54M 11/13CH (MB62HL) (RoHS)
? Module integrated for Mini-PCI interface.
? Easy service for WLAN.
? Wireless communication killer switch (BTO)
? Support MiniPCI IIIB
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1.1 Features 1 Hardware Overview
? Support Intel Wireless Coexistence system with Taiyo Yuden V2.0
? 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 1.7GHZ 0.09u, 1M L2, FSB 400MHz
? Intel® Pentium® M CPU up to 2.26GHZ 0.09u, 2M L2, FSB 533MHz
? Micro FC-PGA package CPU
? System Logic
? ATI Radeon® Xpress 200M +ATI IXP450
? Mobile Intel® 915PM Express Chipset for external graphics controller
? Mobile Intel® 915GM Express Chipset for integrated graphics controller
? ATI Mobility® Radeon® X600SE
? ATI Mobility® Radeon® X700
? ENE KB910 for Keyboard Controller, Battery management Unit, and RTC.
? ENE CB1410 for PCMCIA controller
? TI PCI7411 Multiple Digital Media Card Slot, IEEE 1394 and PCMCIA Controller
? TI PCI4510, IEEE1394 and PCMCIA Controller
? Realtek ALC250 for AC97 CODEC.
? Realtek RTL8 100CL for 10M/100M LAN
? Keyboard Controller
? ENE KB910 is use as Keyboard Controller and Battery management unit.
? Memory
? DDRII-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
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1.2 System Unit 1 Hardware Overview
? Audio subsystem
? Realtek 250D
? Microphone-in and headphone -out.
? No internal Microphone.
? Two stereo speakers
? Sound effect by SRS software
? Volume control : Dial type
? Supports Harman Speakers
? Speaker Volume over 10cc
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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 hard drives
up to 100 GB.
The HDD is shown in Figure 1-1. Specifications are listed in Table 1-1 and Table1-2.
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) 5400
5400 5400 5400
Toshiba HDD Buffer (MB) 16 16 16 16
Hitachi HDD Buffer (MB) 8 8 8 8
Fujitsu HDD Buffer (MB) 8 8 8 8
Bytes per sector 512 512 512 512
Table 1-1 2.5-inch SATA HDD specifications
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 8/8
Fujitsu HDD Buffer (MB) 8/8 8/8 8/8 8/8
Bytes per sector 512 512 512 512
Table 1-2 2.5-inch PATA HDD specifications
1-12 [CONFIDENTIAL] Satellite M70 /Satellite Pro M70 Series Maintenance Manual
1.4 Optical device Drives 1 Hardware Overview
,
1.4 Optical device Drives
? DVD-ROM & CD-RW drive
? DVD Super Multi drive supporting ±R Double Layer
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 1-3.
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 1-3 DVD-ROM & CD-RW drive specifications
33.3 (U-DMA transfer mode 2)
16.6 (PIO mode 4, Multiword DMA mode 2)
180 150
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
DVD-R DL.
CD:
CD-DA, CD-ROM Mode1, Mode2, , CD-R, CD-RW, CDROMXA Mode2 (Form1, Form2), Photo CD (single/multisession), Enhanced CD (CD-EXTRA), CD-Text
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1 Hardware Overview 1.4 Optical device Drives
1.4.2 DVD Super Multi drive supporting ±R 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 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 ra ndom 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
DVD-R DL
CD:
CD-DA, CD-ROM, CD-R, CD-RW, CD-ROMXA,
PhotoCD (muitiSession), Video CD, CD-Extra (CD+), CD-Text
Table 1-4 DVD Super Multi Double Layer drive specifications
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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 M70 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 s tatus:
– 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 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 batter y:
? 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 14.4V(8cell) 4300mAH
Main battery Lithium-Ion 10.8V(6cell) 4000mAH
Main battery Lithium-Ion 14.4V(4cell) 2000mAH
RTC battery Lithium 3.0 V 15mAH
Satellite M70 /Satellite Pro M70 Series Maintenance Manual [CONFIDENTIAL] 1-17
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 tim es 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 sys tem
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
Satellite M70 /Satellite Pro M70 Series Maintenance Manual [CONFIDENTIAL] 1-19
Chapter 2 Troubleshooting Procedures
2
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