IBM-AUSTRIA - PC-HW-Support    30 Aug 1999

Testing the Battery Pack (8551)

1.  Place the computer bottom-side up.
2.  Remove the battery pack and measure the voltage at the battery  terminals between 1 (+.) and 3 (-).

    
   

   Pin	Voltage (Vdc)
   1	+.8.5 to +.18.0
   2	Thermal Detection
   3	Ground

    

   •  If the voltage is less than +.8.5 V dc, the battery pack is  discharged or defective.
   •  If the voltage is more than +.8.5 V dc,  go to the next step.

3.  Using a low-power ohm meter, measure the resistance at  the battery terminals between

     2 (T) and 3 (-)
     The resistance must be 4 kilohms to 30 kilohms.

    If the resistance is out of range, replace the battery pack.

4.  Remove the bottom cover and set the battery pack in place without  connecting any external power devices.
5.  Measure the voltage at the connector between terminals 1  (+.) and 3 (-) on the voltage converter and note the voltage.

    
   

6.  Using the AC adapter, apply external power to the computer.

       Be careful not to cause a short circuit while doing the following steps.  The charging circuit is active even if the computer power switch is  set to off.

7.  Measure the voltage again between terminals

     1 (+.) and 3 (-).

   •  If the voltage is not greater than that measured in Step 5,  replace the AC adapter, then go to the next step.
   •  If the voltage is greater than that  measured in Step 5, the battery pack is good.
   •  Repeat Steps 6 and 7 using  a new AC adapter. If the voltage is still not greater than that  measured in Step 5, replace the voltage converter.

Please see the LEGAL  -  Trademark notice.
Feel free - send a   for any BUG on this page found - Thank you.