IBM ThinkPad 240X, Руководство по техническому обслуживанию аппаратной части

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Checking the AC Adapter:
You are here
because the computer fails only when the AC Adapter is
used:
Ÿ
If the power-on indicator does not turn on, check the
power cord of the AC Adapter for correct continuity
and installation.
Ÿ
If the operational charge does not work, go to
“Checking the Operational Charging.”
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.
If the voltage is not correct, replace the AC Adapter.
If the voltage is within the range, do the following:
Ÿ
Replace the system board.
Ÿ
If the problem is not corrected, go to “Undetermined
Problems” on page 39
Note: An audible noise from the AC Adapter does not
always indicate a defective adapter.
Checking the Operational Charging:
To
check operational charging, use a discharged battery pack
(battery ASM) or a battery ASM that has less than 50% of
the total power remaining when installed in the computer.
Perform operational charging. If the battery status indicator
does not turn on, remove the battery ASM and let it return
to room temperature. Reinstall the battery ASM.
If the charge indicator still does not turn on, replace the
battery ASM. If the charge indicator still does not turn on,
replace the system board. Then reinstall the battery ASM.
If the reinstalled battery ASM is not charged, go to the next
section.
Checking the Battery ASM:
Do the following:
1. Power off the computer.
2. Remove the battery ASM and measure the voltage
between battery terminals 1 (+) and 5 (-). See the fol-
lowing figure:
Pin Voltage (V dc)
1 +15.5 to +17.0
2 Ground
28
ThinkPad 240X