Lenovo A859 Manual de servicio - Página 27

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Repair Manual of Lenovo S920 Mobile Phone

Fault 2:



Fault: The output power of the mobile phone is too high.



Cause: The cable isn't well connected in calibration.



Shooting:

Calibration power is too high

Check RF cable and fixtures to

ensure well connection

Fault 3:



Fault: After repeated calibration, the power is still low.



Cause: Some element patches of PA and surrounding VAPC input are displaced or PA is

damaged.



Shooting:

After repeated calibration, the

power is still low.

PA（U2102） may be

partially

damaged;

recalibrate.

Reconnect and calibrate

Replace

Vramp

circuit