Lenovo ThinkPad E450 (English) Hardware Maintenance Manual - ThinkPad E450, E4 - Page 34
Checkingthecoin-cellbattery - battery replacement
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Checking the coin-cell battery To check the coin-cell battery, do the following: 1. Disconnect the battery connector. See "Disconnect the battery" on page 64. 2. Remove the coin-cell battery. See "1060 Coin-cell battery" on page 68. 3. Measure the voltage of the coin-cell battery. See the following illustration. Wire Red Black Voltage (V dc) +2.5 to +3.2 Ground • If the voltage is correct, replace the system board. • If the voltage is not correct, replace the coin-cell battery. • If the coin-cell battery discharges quickly after replacement, replace the system board. 28 Hardware Maintenance Manual
Checkingthecoin-cellbattery
To check the coin-cell battery, do the following:
1. Disconnect the battery connector. See “Disconnect the battery” on page 64.
2. Remove the coin-cell battery. See “1060 Coin-cell battery” on page 68.
3. Measure the voltage of the coin-cell battery. See the following illustration.
Wire
Voltage(Vdc)
Red
+2.5 to +3.2
Black
Ground
• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the coin-cell battery.
• If the coin-cell battery discharges quickly after replacement, replace the system board.
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Hardware Maintenance Manual