1.3 Checking Power
To check the system power, do the following.
1. Power-off the system.
2. Remove the battery from the system.
3. Check the battery voltage. The voltage should be 8 Volts dc.
If the voltages are not correct, try recharging the battery pack.
If the voltages are correct, continue with the next step to test the
AC adapter voltage.
4. Power-off the system.
5. Unplug the AC adapter from the system.
6. Measure the voltage at the points shown.
PICTURE 1
+------------------------------------------------------------------------+
¦ Table 1. Correct AC Adapter Voltage Measurement ¦
+------------------------------------------------------------------------¦
¦ V dc ¦ + Lead ¦ - Lead ¦
+-----------------------+------------------------+-----------------------¦
¦ +13.5 ¦ 1 ¦ 2 ¦
+------------------------------------------------------------------------+
If the voltage is not correct, replace the AC adapter.
If the voltage is correct, go to "Undetermined Problems" in topic 1.2.
IBM ThinkPad 500 HMM
Checking Power
¦ Copyright IBM Corp. 1993
1.3 - 1