
Checkout guide
Checking the backup battery
Do the following:
1.Power off the computer, and unplug the ac adapter from it.
2.Remove the battery pack (for the removal procedure, see “1010 Battery pack” on page 56).
3.Remove the backup battery (for the removal procedure, see “1060 Backup battery and
page 73).
4.Measure the voltage of the backup battery. See the following figure.
Wire | Voltage (V dc) |
|
|
Red | +2.5 to +3.2 |
|
|
Black | Ground |
|
|
vIf the voltage is correct, replace the system board.
vIf the voltage is not correct, replace the backup battery.
vIf the backup battery discharges quickly after replacement, replace the system board.
Checking the sub-battery
Do the following:
1.Recharge the
2.Power off the computer, and unplug the ac adapter from it.
3.Remove the battery pack (for the removal procedure, see “1010 Battery pack” on page 56).
4.Remove the
5.Measure the voltage of the
Wire | Voltage (V dc) |
|
|
Red | +6.0 to +9.0 |
|
|
Black | Ground |
|
|
vIf the voltage is correct, replace the system board.
vIf the voltage is not correct, replace the
vIf the
General descriptions 31