Power System Checkout; Checking The Ac Adapter - Lenovo IdeaTab A2109A Hardware Maintenance Manual

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.
•
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
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:
•
•
Note: Noise from the AC adapter does not always indicate a defect.
If the power-on indicator does not turn on, check the power cord of the AC
adapter for correct continuity and installation.
following figure:
2
Replace the system board.
If the problem continues, go to
Pin Voltage (V DC)
1
2
1
"Lenovo IdeaTab A2109A-F" on page 24.
General checkout
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