IBM Thinkpad X20 X21 X22 X23 X24 Manual

							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 the reinstalled battery pack has not been charged,
go to the next section.
Checking the battery pack:Battery charging does not
start until the Fuel Gauge 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.
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 4 (-). See the
following figure:
1(+)
4(-)2
3
Terminal Voltage (V dc)
1 + 0 to + 12.6 (6-cell) +0 to 16.8(4-cell)
4 Ground (-)
3. If the voltage is less than +11.0 V dc, the battery pack
has been discharged.
4. If the voltage is more than +11.0 V dc, measure the
resistance between battery terminals 3 and 4. The
resistance between battery terminals 3 and 4 must be
from 4 to 30k ohms.
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.
Checking the backup battery:Do the following:
1. Power off the computer, and unplug the AC adapter
from it.
Chapter 2. General descriptions
37 
						

							2. Turn the computer upside down.
3. Remove the backup battery (see“1030 Backup battery”
on page 60).
4. Measure the voltage of the backup battery. See the
following figure.
k(-)
@
Red(+)
Blac
Wire Voltage (V dc)
Red +2.5 to +3.2
Black Ground
a. If the voltage is correct, replace the system board.
b. If the voltage is not correct, replace the backup
battery.
c. If the backup battery discharges quickly after
replacement, replace the system board.
38ThinkPad X20, X21, X22, X23, X24 
						

							Chapter 3. ThinkPad X20, X21, X22,
X23, X24
Product overview............42
Specifications............42
Statusindicators...........45
Fn key combinations..........47
Symptom-to-FRU index..........48
Numeric error codes..........48
Error messages...........50
Beep symptoms...........51
No beep symptoms.........51
LCD-related symptoms.........52
Intermittentproblems..........52
Undetermined problems.........53
FRU replacement notices.........54
Screwnotices............54
Retaining serial numbers.........55
Restoring the serial number of the system unit 55
RetainingtheUUID.........56
Removing and replacing a FRU........57
1010 Battery pack...........58
1020 DIMM............59
1030 Backup battery..........60
1040 Hard disk drive..........61
1050 Keyboard...........63
For X20, X21...........63
For X22, X23, X24.........65
1060 KBD Control Panel Assemble.....67
1070 Mini PCI adapter.........69
For X20, X21...........69
For X22, X23, X24.........69
1080 CDC adapter..........70
For X22, X23, X24.........71
1090 BDC adapter..........71
For X23, X24...........72
1100 Fan assembly..........72
For X20, X21...........72
For X22, X23...........73
ForX24.............73
1110 Wirelesslan assembly for X22, X23, X24 . . 74
1120 LCD assembly..........75
For X20, X21...........76
For X22, X23, X24.........78
1130 Case Keyboard deck........79
For X20, X21...........80
For X22, X23, X24.........81
1140 Speaker............82
For X20, X21...........82
For X22, X23, X24.........83
1150 PC Card slot assembly.......84
For X20, X21...........84
39  
						

							For X22, X23, X24.........85
1160IRDAPort...........85
For X22, X23, X24.........86
1170 RJ11, RJ45...........87
For X20, X21...........87
For X22, X23, X24.........88
1180 System board..........89
For X20, X21...........89
For X22, X23...........90
ForX24.............90
1190 LCD USB cover..........91
1200 Front bezel...........92
1210 LCD panel...........93
XGA for X20, X21..........94
SVGA for X20, X21.........95
XGA for X22, X23, X24........97
Locations..............98
Front view for X20, X21.........98
FrontviewforX22 ..........98
Front view for X23, X24.........99
Rear view for X20, X21.........101
Rear view for X22, X23, X24.......101
Bottomview............103
PartsList..............104
X20 series model matrix........104
X21 series model matrix........104
X22 series model matrix........105
X23 series model matrix........105
X24 series model matrix........106
LCDFRU.............107
12.1-inch XGA TFT X20, X21......107
12.1-inch SVGA TFT........108
12.1-inch XGA TFT X22, X23, X24....111
System.............112
For X20, X21...........112
ForX22............114
ForX23............117
ForX24............120
Keyboard.............121
For X20, X21...........121
For X22, X23, X24.........121
Base Cover FRU..........122
ForX20............122
ForX21............123
ForX22............123
ForX23............123
ForX24............124
Recovery CDs for X21 Series.......124
Windows 98 recovery CDs.......124
Windows 2000 recovery CDs......125
Windows 2000/Windows NT recovery CDs 125
Windows Me recovery CDs......126
Recovery CDs for X22 Series.......126
40ThinkPad X20, X21, X22, X23, X24 
						

							Windows 98 recovery CDs.......126
Windows 2000 recovery CDs......126
Windows XP Pro recovery CDs.....127
Windows XP Home recovery CDs....127
Recovery CDs for X23 Series.......128
Windows 2000 recovery CDs......128
Windows XP Pro recovery CDs.....128
Windows XP Home recovery CDs....129
Recovery CDs for X24 Series.......129
Windows 2000 recovery CDs......129
Windows XP Pro recovery CDs.....130
Windows XP Home recovery CDs....131
Miscellaneous parts..........131
For X20, X21...........131
For X22, X23...........132
ForX24............133
OptionsFRUlist...........133
For X20, X21...........133
For X22, X23, X24.........134
Common parts list (X20, X21, X22, X23, X24) 135
Tools.............135
Power code (system)........136
Chapter 3. ThinkPad X20, X21, X22, X23, X24
41 
						

							Product overview
This section presents the following product-unique
information:
vSpecifications
vStatus indicators
vFn key combinations
Specifications
The following table lists the specifications of the ThinkPad
X20, X21, X22, X23, X24 series:
Feature Description
ProcessorX20, X21
vIntel
®mobile Pentium®ΙΙΙ700MHz, L2
256–KB cache
vIntel
®Celeron processor 600MHz, L2
128–KB cache
vIntel
®Celeron processor 500MHz, L2
128–KB cache
X22
vIntel
®mobile Pentium®ΙΙΙ-M 733MHz,
L2 512KB cache
vIntel
®mobile Pentium®ΙΙΙ-M 800MHz,
L2 512KB cache
X23
vIntel
®mobile Pentium®ΙΙΙ-M 800MHz,
L2 512KB cache
vIntel
®mobile Pentium®ΙΙΙ-M 866MHz,
L2 512KB cache
X24
vIntel
®mobile Pentium®ΙΙΙ-M 1.06GHz,
L2 512KB cache
vIntel
®mobile Pentium®ΙΙΙ-M 1.13GHz,
L2 512KB cache
Bus architectureX20, X21
vPCI BUS
X22, X23, X24
vHub Architecture
vPCI / LPC BUS
42ThinkPad X20, X21, X22, X23, X24 
						

							Memory (standard)X20, X21
v64 MB (on the system board)
v128 MB (on the system board)
X22, X23, X24
v128 MB (on the system board)
v256 MB (on the system board plus
128 MB DIMM)
Memory (optional)X20, X21
v64 MB, 128 MB, or 256 MB SDRAM
card (maximum of 320/384 MB)
X22, X23, X24
v64 MB, 128 MB, 256 MB or 512 MB
SDRAM card (maximum of 640 MB)
CMOS RAMX20, X21
v114 bytes +4 Kbytes
X22, X23, X24
v256bytes
DisplayX20, X21
v12.1-inch, 16M colors SVGA
(800×600 resolution) TFT color LCD
v12.1-inch, 16M colors XGA
(1024×768 resolution) TFT color LCD
X22, X23, X24
v12.1-inch, 16M colors XGA
(1024×768 resolution) TFT color LCD
Hard disk driveX20, X21
v10GB, 20GB
X22
10GB, 15GB, 20GB, 30GB
X23, X24
20GB, 30GB
I/O portX20, X21
vUSB, RJ11, RJ45, VGA, Mic, Line-in,
Headphone, Docking, 1394 (Some
Models)
X22, X23, X24
USB, RJ11, RJ45, VGA, Mic, IrDA,
Line-in, Headphone, Docking, 1394
(Some Models)
Internal modemX20, X21, X22, X23, X24
vV.90 D/F
Chapter 3. ThinkPad X20, X21, X22, X23, X2443 
						

							AudioX20, X21
vCS4281/CS4297A Mono Speaker
X22, X23, X24
CS4299 Mono Speaker
PC CardX20, X21, X22, X23, X24
T2, Cardbus
AC adapterX20, X21
72W AC/DC
X22, X23, X24
56W AC/DC
Status indicators
The system status indicators show the current computer
status in different colors (green or orange):
5
3
6
7
89
4
12
TM
T
M
Indicator Meaning

1BatteryGreen:The battery is fully charged.
Blinking green:The battery has enough
power to operate but is charging.
Orange:The battery power is low. The
battery is charging.
Blinking orange:The battery needs
charging.
44ThinkPad X20, X21, X22, X23, X24 
						

							
2Standby statusGreen:The computer is in standby mode.
Blinking green:The computer is entering
standby mode or hibernation mode, or is
resuming normal operation.

3Bluetooth(X23,
X24 Bluetooth
Model Only)Green:The Integrated Bluetooth features are
on.
Blinking green:The Integrated Bluetooth
features are functioning.

4Bluetooth
power button(X23,
X24 Bluetooth
Model Only)Press this button to turn the IBM Integrated
Bluetooth on and off.

5Drive in useGreen:Data is read from or written to the
hard disk drive, diskette drive, or drive in the
Ultrabay 2000.

6Num lockGreen:The numeric keypad on the keyboard
is enabled.

7Caps lockGreen:Caps Lock mode is enabled.

8Scroll lockGreen:Arrow keys can be used as
screen-scroll function keys.

9Power onGreen:The power is on.
The following table shows the test for each FRU.
FRU Applicable test
System board
1.Diagnostics-->CPU/Coprocessor
2.Diagnostics-->Systemboard
PowerDiagnostics --> Other Devices --> IBM AC
Adapter, IBM Battery
LCD unit
1.Diagnostics-->Video Adapter
2.Interactive Tests-->Video
Chapter 3. ThinkPad X20, X21, X22, X23, X2445 
						

							Modem
1. Make sure the modem is set up
correctly.
2. Replace the modem jack and the
modem card in turn, and run the
following test inDiagnostics --> Other
Devices.
a. Lucent Modem (M2) Loopback
b. Lucent Modem (M2) Dialtone/DTM
c. Lucent Soft Modem Loopback
d. Lucent Soft Modem Dialtone
e. Intel Modem Register
f. Intel Modem Loopback/DTMF
g. Intel SP Modem Register
h. Intel SP Modem Loopback/DTMF
i. 3Com MiniPCI Modem Test
j. 3Com MiniPCI Dialtone Test
Audio
1.Interactive Tests-->Internal Speaker
2.Diagnostics-->Other Devices-->
Crystal SoundFusion Test
SpeakerInteractive Tests-->Internal Speaker
PC Card slotsDiagnostic-->System Board-->PCMCIA,
PCMCIA External Loop
Keyboard
1.Diagnostics-->System Board-->
Keyboard
2.Interactive Test-->Keyboard
TrackPoint or
pointing deviceIf the TrackPoint does not work, check the
configuration in the ThinkPad Configuration
program. If the TrackPoint is disabled, select
Enableto enable it.
After you use the TrackPoint, the pointer
may drift on the screen for a short time. This
drift can occur when a slight, steady
pressure is applied to the TrackPoint pointer.
This symptom is not a hardware problem.
No service action is necessary if the pointer
stops after a short time
If enabling the TrackPoint does not correct
the problem, continue with the following.
vInteractive Tests --> Mouse
Hard disk driveDiagnostics-->Fixed Disks
Diskette drive
1.Diagnostics-->Diskette Drives
2.Interactive Tests-->Diskette
CD-ROM or DVD
drive1.Diagnostics-->Other Devices-->
CD-ROM/DVD
2.Interactive Tests-->CD-ROM/DVD
Test
46ThinkPad X20, X21, X22, X23, X24