2

1

 

 

 

 

Pin

 

Voltage (V dc)

 

 

 

1

 

+4

 

 

 

2

 

Ground

 

 

 

ŸIf the voltage is+4lessV dc,than replace the voltage converter.

ŸIf the voltage is +4moreV thandc, go to the next step.

7.Power-off the computer and unplug the AC adapter cable from the computer.

8.Reconnect the standby battery to the voltage converter.

9.Plug the AC adapter cable into the computer and power-on the computer. Allow approximately 30 minutes for the standby battery to charge.

10.Power-off the computer and unplug the AC adapter cable from the computer and remove the standby battery.

11. Measure the voltage of the standby battery.

ŸIf the voltage is less than 3.5 V dc, replace th standby battery.

Checking the

Quick

Charger:

If a humming or

 

 

buzzing sound is heard from the

quick charger when it is

operating, replace the quick charger. If

the

charger is

operating

at

a normal

quiet sound

level, do the

following.

1.Perform steps 1 through 3 of the “Checking the Battery Pack” to ensure the battery pack is operating correctly.

2.Connect the power cord to the quick charger and the other end to the ac power outlet. Ensure that the

 

power-on

indicator

is

on.

 

Ÿ If

the

power-on

indicator does not turn on, check

 

the power cord of the quick charger for correct

 

continuity

and

installation.

76

IBM Mobile

Systems

HMM