IBM Z50 - Manual (Page 25)

10 IBM WorkPad z50, Mobile Companion 10
AC Adapter Checkout: You are here because the
WorkPad z50 fails only when the AC Adapter is used.
•
If the power problem occurs only when the cradle is
used, replace the cradle.
• If the power-on indicator for the AC Adapter does not
turn on, check the power cord of the AC Adapter for
correct continuity and installation.
1. Unplug the AC Adapter cable from the WorkPad z50
and measure the output voltage at the plug of the AC
Adapter cable. See the following figure:
1
2
Pin Voltage (V dc)
1 19 V (+ 1.5 V, - 0 V)
2 Ground
a. If the voltage is correct, replace the mainboard.
b. If the voltage is still incorrect, go to the next step.
2. Unplug the AC Adapter cable from the ac power
outlet and wait 5 minutes or longer to allow the
overvoltage protection circuit or other protection
circuits 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.