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"Checking the battery pack" 27
"Checking the backup battery" 28
Checking the AC adapter: You are here because the
computer fails only when the AC adapter is used:
If the power problem occurs only when the port
replicator is used, replace the port replicator.
If the power-on indicator does not turn on, check the
power cord of the AC adapter for correct continuity
and installation.
If the computer does not charge during operation, go
to "Checking operational charging."
1. Unplug the AC adapter cable from the computer and
measure the output voltage at the plug of the AC
adapter cable. See the following figure:
1
2
(16 - 10 V)
If the voltage is not correct, replace the AC adapter. If
the voltage is acceptable, do the following:
Replace the system board.
If the problem persists, go to “Product overview”
on page 32.
Note: Noise from the AC adapter does not always
indicate a defect.
Checking operational charging: To check operational
charging, 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 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
Pin
Voltage (V dc)
1
+15.5 to +17.0
2
Ground
General descriptions
27
Summary of Contents for ThinkPad X20
Page 1: ...IBM Mobile Systems ThinkPad X20 Series computer Hardware Maintenance Manual June 2000 ...
Page 2: ...IBM Mobile Systems ThinkPad X20 Series computer Hardware Maintenance Manual June 2000 IBM ...
Page 3: ...i ...
Page 36: ...30 ThinkPad X20 ...
Page 58: ...1060 Mini PCI adapter Battery pack 1010 Keyboard assembly 1050 6 52 ThinkPad X20 ...
Page 60: ...1080 LCD assembly Battery pack 1010 Keyboard assembly 1050 1 ThinkP ad 2 54 ThinkPad X20 ...
Page 69: ...Step Screw quantity Torque 1 M2 3 5mm 2 BK 19 6 Ncm 2 kgfcm ThinkPad X20 63 ...
Page 71: ...1 Step Screw quantity Torque 1 M2 3 5mm 2 BK 19 6 Ncm 2 kgfcm ThinkPad X20 65 ...
Page 84: ...78 ThinkPad X20 ...
Page 86: ...IBM Part Number 19K6850 Printed in U S A 19K685ð ...