IBM Thinkpad A20mp A21mp A22mp Manual

							5. Follow the instructions on the screen. If there is a
problem, PC-Doctor shows messages describing it.
6. To exit the test, selectQuit—Exit Diag.
To cancel the test, press Esc.
Note:After executing PC-Doctor, check the system
time/date and reset them if needed.
Detecting system information with
PC-Doctor
PC-Doctor can detect the following system information:
Hardware InfovSystem Configuration
vMemory Contents
vPhysical Disk Drives
vLogical Disk Drives
vVGA Information
vIDE Drive Info
vPCI Information
vPNPISA Info
vSMBIOS Info
vVESA LCD Info
UtilityvRun External Tests
vSurface Scan Hard Disk
vBenchmark System
vDOS Shell
vTech Support Form
vBattery Rundown
vView Test Log
vPrint Log
vSave Log
vFull Erase Hard Drive
vQuick Erase Hard Drive
Power system checkout
To verify a symptom, do the following:
1. Power off the computer.
2. Remove the battery pack.
3. Connect the ac adapter.
4. Check that power is supplied when you power on the
computer.
5. Power off the computer.
6. Disconnect the ac adapter and install the charged
battery pack.
7. Check that the battery pack supplies power when you
power on the computer.
If you suspect a power problem, see the appropriate one
of the following power supply checkouts:
Checkout guide
General descriptions35 
						

							v“Checking the ac adapter”
v“Checking operational charging”
v“Checking the battery pack”on page 37
v“Checking the backup battery”on page 37
Checking the ac adapterYou are here because the computer fails only when the ac
adapter is used:
vIf the power problem occurs only when the port
replicator is used, replace the port replicator.
vIf the power-on indicator does not turn on, check the
power cord of the ac adapter for correct continuity and
installation.
vIf the computer does not charge during operation, go to
″Checking operational charging.″
To check the ac adapter, do the following:
1. Unplug the ac adapter cable from the computer.
2. Measure the output voltage at the plug of the ac
adapter cable. See the following figure:
2
1
(16-10V)
Pin Voltage (V dc)
1 +15.5 to +17.0
2 Ground
3. If the voltage is not correct, replace the ac adapter.
4. If the voltage is acceptable, do the following:
vReplace the system board.
vIf the problem persists, go to“Product overview”on
page 41.
Note:Noise from the ac adapter does not always indicate
a defect.
Checking operational chargingTo check whether the battery charges properly during
operation, use a discharged battery pack or a battery pack
that has less than 50% of the total power remaining when
installed in the computer.
Perform operational charging. If the battery status indicator
or icon does not turn on, remove the battery pack and let it
return to room temperature. Reinstall the battery pack. If
the charge indicator or icon still does not turn on, replace
the battery pack.
If the charge indicator still does not turn on, replace the
system board. Then reinstall the battery pack. If it is still
not charged, go to the next section.
Checkout guide
36ThinkPad A20m/p, A21m/p, A22m/p 
						

							Checking the battery packBattery charging does not start until the Power Meter
shows that less than 95% of the total power remains;
under this condition the battery pack can charge to 100%
of its capacity. This protects the battery pack from being
overcharged or from having a shortened life.
To check the status of your battery, move your cursor to
the Power Meter icon in the icon tray of the Windows
taskbar and wait for a moment (but do not click), and the
percentage of battery power remaining is displayed. To get
detailed information about the battery, double-click the
Power Meter icon.
Note:If the battery pack becomes hot, it may not be able
to charge. Remove it from the computer and leave it
at room temperature for a while. After it cools down,
reinstall and recharge it.
To check the battery pack, do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage
between battery terminals 1 (+) and 5 (). See the
following figure:
5(-)4321(+)
Terminal Voltage (V dc)
1 + 0 to + 12.6
5 Ground ()
3. If the voltage is less than +11.0 V dc, the battery pack
has been discharged.
Note:Recharging will take at least 3 hours, even if the
indicator does not turn on.
If the voltage is still less than +11.0 V dc after
recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the
resistance between battery terminals 4 and 5. The
resistance must be 4 to 30 K.
If the resistance is not correct, replace the battery
pack. If the resistance is correct, replace the system
board.
Checking the backup batteryDo the following:
1. Power off the computer, and unplug the ac adapter
from it.
2. Turn the computer upside down.
Checkout guide
General descriptions37 
						

							3. Remove the battery pack (see“1010 Battery pack”on
page 60 ).
4. Remove the backup battery (see“Checking the battery
pack”on page 37).
5. Measure the voltage of the backup battery. See the
following figure.
Red (+)
Black (-)Wire Voltage (V dc)
Red +2.5 to +3.2
Black Ground
vIf the voltage is correct, replace the system board.
vIf the voltage is not correct, replace the backup battery.
vIf the backup battery discharges quickly after
replacement, replace the system board.
Checkout guide
38ThinkPad A20m/p, A21m/p, A22m/p 
						

							ThinkPad A20m/p, A21m/p and
A22m/p
Product overview............41
Specifications............41
Status indicators...........44
FRU tests.............46
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 problems..........55
Undetermined problems.........55
FRU replacement notices.........56
Screw notices............56
Retaining serial numbers.........57
Restoring the serial number of the system unit 57
Retaining the UUID.........57
Removing and replacing a FRU........59
1010 Battery pack...........60
1020 DIMM............61
1030 Mini PCI adapter.........63
For A20m/p, A21m/p series.......64
For A22m/p series.........65
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
For A20m/p and A21m/p series (microphone and
speaker cable)..........78
For A22m/p series (speaker cable).....79
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 CPU........89
1190 System board and RJ45/11 connector
assembly............91
For A20m/p and A21m/p series......92
For A22m/p series.........92
Thermal rubbers location.........93
2010 LCD assembly..........94
2020 Front bezel...........96
© Copyright IBM Corp. 2001
39  
						

							12.1-in. panel...........96
14.1-in. and 15.0-in. panels.......97
2030 Inverter card..........99
12.1-in. panel...........99
14.1-in. and 15.0-in. panels......100
2040 LCD panel...........101
12.1-in. panel...........101
14.1-in. and 15.0-in. panels......103
3010 ThinkPad Dock PCI cover......105
3020 ThinkPad Dock top cover......107
Locations..............112
Front view.............112
Rear view.............113
Bottom view............114
Parts list..............115
A series model matrix.........115
Overall.............123
AC adapter............136
LCD FRUs............136
12.1-in. SVGA TFT.........136
14.1-in. XGA TFT.........137
15.0-in. XGA TFT (LG)........138
15.0-in. XGA TFT (SAMSUNG).....138
15.0-in. SXGA+ TFT........139
15.0-in. UXGA TFT.........139
Keyboard.............140
Recovery CDs...........141
For Windows 98 (A22m).......141
For Windows 98 (A22p).......142
For Windows 2000 (A22m).......143
For Windows 2000 (A22p).......143
For Windows 2000/Windows NT (A22m) 143
For Windows 2000/Windows NT (A22p) . . . 144
Miscellaneous parts..........145
Optional FRUs...........147
Common parts list..........148
Tools.............148
Power cords (system)........148
Power cords (docking station)......149
Notices..............150
Trademarks............150
40ThinkPad A20m/p, A21m/p, A22m/p 
						

							Product overview
This section presents the following product-unique
information:
v“Specifications”
v“Status indicators”on page 44
v“FRU tests”on page 46
v“Fn key combinations”on page 48
Specifications
The following table lists the specifications of the ThinkPad
A20m/p, A21m/p and A22m/p series:
Feature Description
ProcessorA20m
vIntel
®Celeron®processor 500 MHz, L2
256-KB cache
vIntel
®Celeron®processor 550 MHz, L2
256-KB cache
vMobile Intel
®Pentium®III processor
500 MHz, L2 256-KB cache
vMobile Intel
®Pentium®III processor at
600 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
650 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
700 MHz featuring Intel®SpeedStep™
technology
A20p
vMobile Intel
®Pentium®III processor at
700 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
750 MHz featuring Intel®SpeedStep™
technology
A21m
vMobile Intel
®Pentium®III processor at
700 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
750 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
800 MHz featuring Intel®SpeedStep™
technology
(continued)
Product overview
ThinkPad A20m/p, A21m/p and A22m/p41 
						

							Feature Description
ProcessorA21p
vMobile Intel
®Pentium®III processor at
850 MHz featuring Intel®SpeedStep™
technology
A22m
vMobile Intel
®Pentium®III processor at
800 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
850 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
900 MHz featuring Intel®SpeedStep™
technology
vMobile Intel®Pentium®III processor at
1 GHz featuring Intel®SpeedStep™
technology
A22p
vMobile Intel
®Pentium®III processor at
1 GHz featuring Intel®SpeedStep™
technology
Bus architecture PCI Bus
Memory (standard)A20m/p
v64 MB (on the system board)
v128 MB (on the system board)
A21m/p
v64 MB (on the system board)
v128 MB (on the system board)
v64 MB (64 MB SO-DIMM×1)
v128 MB (128 MB SO-DIMM×1)
A22m/p
v64 MB (64 MB SO-DIMM×1)
v128 MB (128 MB SO-DIMM×1)
Memory (optional) 64 MB, 128 MB, or 256 MB DIMM card
(maximum of 512 MB)
CMOS RAM 114 bytes + 128 bytes
Displayv12.1-inch, 16M colors, SVGA (800×600
resolution) TFT color LCD
v14.1-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
v15.0-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
v15.0-inch, 16M colors, SXGA+
(1400×1050 resolution) TFT color LCD
v15.0-inch, 16M colors, UXGA
(1600×1200 resolution) TFT color LCD
(continued)
Product overview
42ThinkPad A20m/p, A21m/p, A22m/p 
						

							Feature Description
Diskette drive 1.44 MB (3-mode), 3.5-inch
Hard-disk driveA20m/p
v6.0 GB, 2.5-inch, IDE interface
v12.0 GB, 2.5-inch, IDE interface
v18.0 GB, 2.5-inch, IDE interface
v20.0 GB, 2.5-inch, IDE interface
A21m/p
v10.0 GB, 2.5-inch, IDE interface
v20.0 GB, 2.5-inch, IDE interface
v32.0 GB, 2.5-inch, IDE interface
A22m/p
v10.0 GB, 2.5-inch, IDE interface
v20.0 GB, 2.5-inch, IDE interface
v30.0 GB, 2.5-inch, IDE interface
v32.0 GB, 2.5-inch, IDE interface
I/O portvExternal monitor
vLine-in
vHeadphone
vMicrophone
vMouse or keyboard
vParallel
vPort replicator connector
vSerial
vUniversal serial bus (USB) connector
vRJ11
vRJ45
vTV-in/out (for MT2629)
vTV-out (for MT2628-Fxx, Gxx, Sxx, Txx,
MT2623-Gxx, Txx)
Internal modem 56.6 Kbps
AudiovInternal microphone (for A20m/p,
A21m/p)
vInternal speaker
vSoftware control volume
Infrared transfer IrDA 1.1
PC Card One Type-III or two Type-II
AC adapter 72-watt type
Bay deviceA20m/p
v10-24 x CD-ROM drive
v6 x DVD drive
A21m/p, A22m/p
v10-24 x CD-ROM drive
v8 x DVD driveProduct overview
ThinkPad A20m/p, A21m/p and A22m/p43 
						

							Status indicators
The system status indicators show the status of the
computer, as follows:
Indicator Meaning

1BatteryGreen:The battery is fully charged.
Blinking green:
The battery has enough power to
operate, but is being charged.
Orange:The battery power is low. The battery
is to being charged.
Blinking orange:
The battery needs to be charged.
when the indicator starts blinking
orange, the computer beeps three
times.

2Standby
statusGreen:The computer is in standby mode.
Blinking green:
The computer is entering standby
mode or hibernation mode, or is
resuming normal operation. This
indicator does not blink in Windows
2000 and Windows Me.

3Drive in
useGreen:Data is being read from or written to
the hard-disk drive, the diskette drive,
or the drive in the Ultrabay 2000.
When this indicator is on, do not put
the computer into standby mode or
turn off the computer.
Note:Do not move the system while the Green
drive in use light is on. Sudden physical shock
could cause drive errors.
(continued)
Product overview
44ThinkPad A20m/p, A21m/p, A22m/p