Lenovo ThinkPad 560E ThinkPad 560X Hardware Maintenance Manual (Oct 1997) - Page 41

Checking Operational Charging:, Checking the Battery Pack:, DC/DC card.

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Replace the system board. If the problem is not corrected, go to "Undetermined Problems" on page 46. If the voltage is not correct, go to the next step. Note: An audible 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 does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator still does not turn on, replace the battery pack. If the charge indicator still does not turn on, replace the DC/DC card. Then reinstall the battery pack. If the reinstalled battery pack is not charged, go to the next section. Checking the Battery Pack: Battery charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being overcharged or having a shortened life. 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: 3. If the voltage is less than +11.0 V dc, the battery pack has been discharged. Recharge the battery pack. In this case, the battery pack is over-discharged. It takes at least 2 hours to recharge the battery pack even if the indicator does not turn on. If the voltage is still less than +11.0 V dc after recharging, replace the battery. ThinkPad 560X (2640-60x, 70x) 31

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±
Replace the system board.
±
If the problem is not corrected, go to “Undetermined
Problems” on page
46.
±
If the voltage is not correct, go to the next step.
Note:
An audible 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 does not turn on, remove the battery pack and let
it return to room temperature.
Reinstall the battery pack.
If the charge indicator still does not turn on, replace the
battery pack.
If the charge indicator still does not turn on, replace the
DC/DC card.
Then reinstall the battery pack.
If the
reinstalled battery pack is not charged, go to the next
section.
Checking the Battery Pack:
Battery charging will
not start until the Fuel-Gauge shows that less than 95% of
the total power remains; with this condition the battery
pack will charge to 100% of its capacity.
This protects the
battery pack from being overcharged or having a
shortened life.
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:
3.
If the voltage is less than
+
11.0 V dc, the battery pack
has been discharged.
Recharge the battery pack.
In this case, the battery pack is over-discharged.
It
takes at least 2 hours to recharge the battery pack
even if the indicator does not turn on.
If the voltage is still less than
+
11.0 V dc after
recharging, replace the battery.
ThinkPad 560X
(2640-60x, 70x)
31