Lenovo 07642WU Hardware Maintenance Manual - Page 34
Checkout, guide
UPC - 883609490645
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Checkout guide Note: If the battery pack becomes hot, it may not be able to charge. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it. To check the battery pack, 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 following figure: 7(+) 6(+) 3 45 2(-) 1(-) Terminal 1, 2 6, 7 Voltage (V dc) Ground (−) + 0 to + 12.6 3. If the voltage is less than +11.0 V dc, the battery pack has been discharged. Note: Recharging will take at least 3 hours, even if the indicator does not turn on. If the voltage is still less than +11.0 V dc after recharging, replace the battery. 4. If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 4 and 7. The resistance must be 4 to 30 K . If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board. 28 MT 0763 and 0764