Checking the Battery ASM

Note: The Battery ASM may not be able to charged when it is hot. In that case, remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall it and recharge it.

Do the following:

1.Power off the computer.

2.Remove the battery pack and measure the voltage between battery terminals 1 (+) and 6 (-). See the following figure.

6

5 4

3

1

2

Terminal

Pin No.

Description

 

 

 

1

1

+0 to +12.6 for LiION

 

 

+0 to +13V for NiMH

 

 

 

2

Slit

Isolation slit

 

 

 

3

4

Thermistor

 

 

 

4

5

Battery —

 

 

 

Note: Signal lines, not used in these steps, are used for communications between the system and the battery.

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 8V for NiMH, 9V for LiION, measure the resistance between battery terminals 5 and 6. The resistance must be 4 to 30K￿. If the

38ThinkPad R30/R31 HMM

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Image 44
IBM R30, R31 manual Checking the Battery ASM