Lenovo A516 Panduan Servis - Halaman 27

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Repair Manual of Lenovo A516 Mobile Phone

4.2 Production calibration

⚫

Fault: AFC calibration Fail.

⚫

Reason: RF test cable is not connected well during calibration; TCXO is oppositely pasted

or in cold solder joint.

⚫

Shooting:

AFC calibration

Fail

Check whether RF cable and

fixture is well connected?

Check

whether

（ U2104 ） is oppositely

pasted?

Check

whether

（ U2104 ） is in cold solder

joint?

Recalibrate

Check whether there is power

output from PA (U2102)

⚫

Notes: Remember to recalibrate after replacing elements.

TCXO

Reconnect and calibrate

Re-weld U2104

Replace PA（U2102）