Lenovo ThinkPad S31 ThinkPad S30, S31 Hardware Maintenance Manual (October 200 - Page 19

Checking the Operational Charging, Checking the Battery ASM

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If the voltage is within the range, do the following: v Replace the system board. v If the problem is not corrected, go to "Undetermined Problems" on page 25. 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 following figure: Note: Signal lines, not used in these steps, are used for communications between the system and the battery. ThinkPad s30, s31 15

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If the voltage is within the range, do the following:
v
Replace the system board.
v
If the problem is not corrected, go to
“
Undetermined
Problems
”
on page 25.
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
following figure:
Note:
Signal lines, not used in these steps, are used
for communications between the system and the
battery.
ThinkPad s30, s31
15