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

Testing the Standby Battery (8551)

1.  Place the computer bottom-side up.
2.  Remove the battery pack from the computer and remove the  bottom cover.
3.  Disconnect the battery connector from the voltage converter.
4.  Plug the AC adapter into the computer and power-on the computer.
5.  Measure the output voltage at the connector on the voltage converter.

    
   

   Pin	Voltage (Vdc)
   1	+.4
   3	Ground

    

   •  If the voltage is less than +.4 V dc, replace the voltage  converter.
   •  If the voltage is greater than +.4 V dc, go to the next step.

6.  Power-off the computer.
7.  Reconnect the standby battery to the voltage converter.
8.  Power-on the computer and leave it approximately 30 minutes to allow  the standby battery to be charged.
9.  Power-off the computer again and disconnect the standby battery.
10.  Measure the voltage of the standby battery.
    •  If the voltage is less than 3.5 V dc, replace the standby battery.
    •  If the voltage is greater than 3.5 V dc, replace the voltage converter.

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