IBM 600X (MT 2646) manual 16 10, Adapter, Pin Voltage V dc

Checkout guide

4.Check that power is supplied when you power computer.

5.Power off the computer.

6.Disconnect the ac adapter and install the ch battery pack.

7.Check that power is supplied by the battery when you power on the computer.

If	you suspect		a	power	problem,	see the appro
of	the following power supply checkouts:
Ÿ	“Checking	the	ac	adapter”
Ÿ	“Checking	operational charging”
Ÿ	“Checking	the	battery		pack” on	page 11

Ÿ“Checking the backup battery” on page 12

Checking	the ac	adapter:	You are here because
the	computer	fails	only when the ac adapter is

ŸIf the power problem occurs only when the p

replicator is used, replace the port replica

ŸIf the power-on indicator does not turn on, c power cord of the ac adapter for correct and installation.

Ÿ If	the computer does not charge during oper
to	“Checking operational charging.”

1.Unplug the ac adapter cable from the compu measure the output voltage at the plug of th adapter cable. See the following figure:

(16 - 10 V)

Pin

1

2

Voltage (V dc)

+15.5 to+17.0

Ground

If	the	voltage		is	not	correct,	replace the
If	the	voltage is			acceptable, do the follow
Ÿ	Replace		the	system		board.
Ÿ	If	the	problem		persists, go		to “Product o
	on page 13.

Note: Noise from the ac adapter does not always a defect.

Checking operational		charging:		To check
operational charging, use a discharged					battery p
battery	pack	that has	less	than 50% of the total
remaining	when	installed	in the	computer.

10 ThinkPad 600X Hardware Maintenance Manual