Filter
Top Products
4. Remove the backup battery (see “1130 Backup battery” on page 102).
5. Measure the voltage of the backup battery. See the following figure.
Red (+)
Black (-)
Wire Voltage (V dc)
Red +2.5 to +3.2
Black Ground
v If the voltage is correct, replace the system board.
v If the voltage is not correct, replace the backup battery.
v If the backup battery discharges quickly after replacement, replace the system
board.
General checkout 53