5.0 Power Supply
As the battery pack, backup and standby batteries have a given lifespan,
having spares of these batteries on hand can eliminate problems. When one
of these batteries is suspected of failing, the spare can be used in its
place. One or all of these batteries can be discharged if a short circuit
is present in the system.
1. Replace the failing FRU if the power supply problem is caused by a
short circuit.
2. Determine if one (or all) of the batteries have become discharged.
Replace any discharged battery with its spare.
The test procedures for each power device are found on the following
pages.
"Checking the AC Adapter" in topic 5.1.
"Checking the Car Battery Adapter" in topic 5.2.
"Checking the Battery Pack" in topic 5.3.
"Checking the Backup Battery" in topic 5.4.
"Checking the Standby Battery" in topic 5.5.
"Checking the Quick Charger" in topic 5.6.
None of the above. Follow the steps below.
+---+
¦001¦
+---+
DID THE PROBLEM OCCUR ONLY WHEN USING THE AC ADAPTER?
Yes No
¦ ¦
¦ +---+
¦ ¦002¦
¦ +---+
¦ Go to Step 004.
¦
+---+
¦003¦
+---+
Go to "Checking the AC Adapter" in topic 5.1.
If"Checking the AC Adapter" does not correct the problem, replace the
voltage converter.
--------------------------------------------------------------------------
+---+
¦004¦
+---+
DID THE PROBLEM OCCUR ONLY WHEN USING THE CAR BATTERY ADAPTER?
Yes No
¦ ¦
¦ +---+
¦ ¦005¦
¦ +---+
¦ Go to Step 007.
¦
+---+
¦006¦
+---+
Go to "Checking the Car Battery Adapter" in topic 5.2.
--------------------------------------------------------------------------
+---+
¦007¦
+---+
DID THE PROBLEM OCCUR ONLY WHEN USING THE BATTERY?
Yes No
¦ ¦
¦ +---+
¦ ¦008¦
¦ +---+
¦ Go to Step 014.
¦
+---+
¦009¦
+---+
DOES A FULLY-CHARGED BATTERY DISCHARGE QUICKLY?
Yes No
¦ ¦
¦ +---+
¦ ¦010¦
¦ +---+
¦ Go to Step 013.
¦
IBM PS/2 Model N51 SX HMS
Power Supply
¦ Copyright IBM Corp. 1991
5.0 - 1