IBM 380Z manual Battery Checkout, Lines not used in these steps are used

b. If the voltage is correct, make sure the connection between the DC/DC card and the system board is not loose.

c. Replace the DC/DC card.

d. If the problem is not corrected, replace the system board.

e. If the problem persists, go to “Undetermined Problems” on page 32.

2.Unplug the AC Adapter cable from the ac power outlet and wait 5 minutes or longer to allow the overvoltage protection circuit to be fully discharged

	and	initialized.
3.	Plug	the	AC	Adapter	cable into the ac power outlet.
4.	Measure		the	output	voltage of the AC Adapter.

5.If the voltage is still not correct, replace the AC Adapter.

Note: An audible noise from the AC Adapter does not always indicate a defect.

Battery Checkout:	If the error is due to the battery,
do the following:

1.Turn off the computer.

2.Remove the battery and measure the voltage between the battery terminals+) and −41). (

Terminal		Voltage (V dc) / Signal
1		+0 to+13.5
4		Ground ( −)
Note: Signal	lines not used in these steps are used
for	communication between the system and
the	battery.

3.If the voltage is+11less.0 Vthandc, the battery has been discharged. Recharge the battery.

If the voltage is still+11.less0V thandc after recharging, replace the battery.

Note: The voltage of the battery could show 0 V because of the overdischarge protection

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