IBM Thinkpad A20mp A21mp A22mp Manual

IBM Mobile Systems
ThinkPad Computer
Hardware Maintenance Manual
October 2001
This manual supports: ThinkPad A20m, A21m, A22m (MT 2628/2633)
A20p, A21p, A22p (MT 2629)
ThinkPad Dock (MT 2631)

            

NoteBefore using this information and the product it
supports, be sure to read the general information
under “Notices” on page 150.
Second Edition (October 2001)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPORATION
PROVIDES THIS PUBLICATION “AS IS” WITHOUT ANY
WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
LIMITED WARRANTIES OF MERCHANTABILITY OR...

About this manual
This manual contains service and reference information for
IBM ThinkPad A20, A21, A22 (MT2628, 2629, 2633), and
ThinkPad Dock (MT2631) products. Use this manual along
with the advanced diagnostic tests to troubleshoot
problems.
The manual is divided into sections as follows:
vThe common sections provide general information,
guidelines, and safety information required in servicing
computers.
vThe product-specific section includes service, reference,
and product-specific parts...

ivThinkPad A20m/p, A21m/p, A22m/p 

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 translations......3
Safety information............14
General safety............14
Electrical safety...........15
Safety inspection guide.........16
Handling electrostatic discharge-sensitive devices 17
Grounding requirements.........18
Laser compliance...

1040 Backup battery..........66
1050 Hard-disk drive or RF ID adapter....67
1060 Ultrabay 2000 device........69
1070 Keyboard...........71
1080 Keyboard CRU insulator.......74
1090 Hinge cover and clear sheet icon....75
1100 Keyboard bezel and speaker......76
1110 Microphone and speaker cable.....78
1120 Sub card............80
1130 PC Card slot assembly.......82
1140 Fan assembly..........83
1150 Diskette drive..........85
1160 Upper shield...........87
1170 TV card............88
1180 CPU socket and...

Introduction
Important service information
ImportantBIOS and device driver fixes are
customer-installable. The BIOS and device drivers
are posted on the IBM support site
http://www.ibm.com/pc/support
Advise customers to contact the PC Company
HelpCenter at 800-772-2227 if they need assistance
in obtaining or installing any diskette fixes.
Customers in Canada should call IBM HelpPC at
800-565-3344 for assistance or download
information.
Strategy for replacing FRUs
Before replacing partsMake sure that all...

Strategy for replacing a hard-disk driveAlways try to run a low-level format before replacing a
hard-disk drive.
Attention:The drive startup sequence in the computer
you are servicing may have been changed. Be extremely
careful during write operations such as copying, saving, or
formatting. If you select an incorrect drive, data or
programs can be overwritten.
How to use error messages
Use the error codes displayed on the screen to diagnose
failures. If more than one error code is displayed, begin the...

Safety notices: multilingual translations
In this manual, safety notices appear in English with a
page number reference to the appropriate multi-lingual,
translated safety notice found in this section.
The following safety notices are provided in English,
French, German, Italian, and Spanish languages.
Safety notice 1
Before the computer is powered-on after FRU
replacement, make sure all screws, springs, and other
small parts are in place and are not left loose inside
the computer. Verify this by shaking...

Safety notice 2
DANGER
Some standby batteries contain a small amount of
nickel and cadmium. Do not disassemble a standby
battery, recharge it, throw it into fire or water, or
short-circuit it. Dispose of the battery as required
by local ordinances or regulations. Use only the
battery in the appropriate parts listing. Use of an
incorrect battery can result in ignition or explosion
of the battery.
Certaines batteries de secours contiennent du
nickel et du cadmium. Ne les démontez pas, ne les
rechargez pas,...