Lenovo 1304XF8 사용자 설명서
21
General checkout
Power system checkout
If you suspect a power problem, see the appropriate one of the following power
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
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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
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:
Voltage (V DC)
+20
0
Pin
1
2
1
2
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:
3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
Replace the system board.
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If the problem continues, go to
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Note: Noise from the AC adapter does not always indicate a defect.