Lenovo 0578F5U User Manual - Page 63
Voltage V dc, If the backup battery discharges quickly after replacement, replace the system
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4. Remove the backup battery (see "1120 Backup battery" on page 98). 5. Measure the voltage of the backup battery. See the following figure. Red (+) Black (-) Wire Red Black Voltage (V dc) +2.5 to +3.2 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 55
![](/manual_guide/products/lenovo-03018gu-user-manual-27fe3d3/63.png)
4.
Remove the backup battery (see “1120 Backup battery” on page 98).
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
55