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IBM ThinkPad T20 T21 T22 T23

Tags : IBMThinkPadT20T21T22T23264726482631 
IBM ThinkPad T20 T21 T22 T23 Hardware Maintenance Manual

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Description

IBM ThinkPad T20 T21 T22 T23 Hardware Maintenance Manual
First Edition (April 2002) - 182 pages

This manual contains service and reference information for IBM ThinkPad: T20, T21, T22, T23 (MT 2647/2648) and ThinkPad Dock (MT 2631)

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Contents
About this manual . iii
Introduction . 1
Important service information. 1
Strategy for replacing FRUs 1
How to use error messages 2
Diskette compatibility matrix . 2
Safety notices: multilingual translations3
Safety information13
General safety13
Electrical safety . 14
Safety inspection guide . 15
Handling devices that are sensitive to electorostatic
discharge 16
Grounding requirements. 17
Laser compliance statement. 18
General descriptions 21
Read this first . 21
What to do first . 21
Related service information . 23
Service web site . 23
Restoring the preloaded system 23
Passwords. 26
Power management 28
Checkout guide 32
Testing the computer33
Detecting system information with PC-Doctor. 34
Power system checkout . 35
ThinkPad T20, T21, T22 and T23 series. 39
Product overview 41
Specifications 43
Status indicators . 45
FRU Tests . 47
Fn key combinations 48
Symptom-to-FRU index 49
Numeric error codes 49
Error messages . 52
Beep symptoms . 53
No-beep symptoms 53
LCD-related symptoms . 54
Intermittent problems55
Undetermined problems . 55
FRU replacement notices . 56
Screw notices 56
Retaining serial numbers. 57
Removing and replacing a FRU59
1010 Battery pack. 60
1020 Backup battery 61
1030 Hard-disk drive63
1040 DIMM 65
1050 Mini PCI adapter . 66
1060 Ethernet daughter card . 71
1070 Ultrabay 2000 device 73
1080 Keyboard . 74
1090 Keyboard CRU insulator . 82
1100 Hinge cover. 83
1110 Keyboard bezel88
1120 Fan assembly 94
1130CPU . 98
1140 PC Card slot assembly . 100
1150 Speaker . 103
1160 Hard-disk bay 105
1170 Ultrabay 2000 slot 107
1180 System board 113
1190 Secure chip 117
1200 Microphone cable. 118
2010 LCD assembly121
2020 Front bezel. 122
2030 Inverter card 123
2040 LCD panel. 125
2050 Antenna assembly 128
2060 Sub card . 131
3010 ThinkPad Dock PCI cover 133
3020 ThinkPad Dock top cover 136
Locations140
Front view 140
Rear view. 141
Bottom view 142
Parts list 143
T20, T21, T22 and T23 series model matrix 146
Overall . 147
AC adapters 156
LCD FRUs 157
Keyboard. 160
Recovery CDs . 161
Miscellaneous parts170
Optional FRUs . 171
Common parts list 172
Notices 174
Trademarks 174



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