Lenovo A3000 Spezifikationen PDF herunterladen (Seite 25)

General checkout

Power system checkout

If you suspect a power problem, see the appropriate one of the following power

supply checkouts:

•• “Checking the AC adapter” on page 21

•• “Checking the battery pack” on page 22

Checking the AC adapter

You are here because the computer fails only when the AC adapter is used.

• If the power-on indicator does not turn on, check the power cord of the AC adapter

for correct continuity and installation.

To check the AC adapter, follow the steps below:

1. Unplug the AC adapter cable from the tablet.

2. Measure the output voltage at the plug of the AC adapter cable. See the following

figure:

Note: Output voltage for the AC adapter pin No. 2 may differ from the one you are

servicing.

3. If the voltage is not correct, replace the AC adapter.

4. If the voltage is acceptable, do the following:

• Replace the system board.

• If the problem continues, go to “Lenovo IdeaTab A3000” on page 24.

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

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Lenovo A3000 Spezifikationen Seite 25