Lenovo A516 Panduan Servis - Halaman 32

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Repair Manual of Lenovo A516 Mobile Phone

4.3.2 High Frequency Error

⚫

Fault: Frequency Error exceeds standard in complete set test.

⚫

Cause: There is problem in VAFC input circuit of TCXO.

⚫

Shooting:

is in cold solder joint or damaged

Replace the elements in

joint

⚫

Fault: Phase Error exceeds standard in complete set test.

⚫

Cause: The capacitors of power supply part of PA and transceiver are in cold solder joint

or in short circuit with other resistance.

⚫

Shooting:

Excessive

Frequency Error

Recalibrate

Check whether U2104

cold solder