If the voltage is not correct, replace the AC Adapter.
If the voltage is within the range, do the following:
Replace the DC-DC & BATT board.
Replace the system board.
If the problems still persist, go to “Undetermined
Problems” on page 38.
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
(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
or icon does not turn on or does not show orange color,
remove the Battery ASM and let it return to room temper-
ature. Reinstall the Battery ASM. If the charge indicator or
icon still does not turn on or still does not show orange
color, replace the Battery ASM.
If the charge indicator still does not turn on, replace the
DC-DC & BATT board, then 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:
After the battery is
fully charged, charger can not charge battery until the Fuel
Gauge shows that less than 95% of total power remains;
with this condition the battery pack can charge to 100% of
its capacity. This protects the Battery ASM from being
overcharged or from having a shortened life.
Note: The Battery ASM might not be able to charged
when it is hot. In that case, remove it from the
computer and leave it at room temperature for a
while. After it cools down, reinstall it and recharge
it.
Do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage
between battery terminals 1 (+) and 7 (-). See the fol-
lowing figure.
Pin
Voltage (V dc)
1
15.5V — 17.0V
2
Ground
ThinkPad i Series 1400/1500
31
