High Frequency Error; High Phase Error - Lenovo A516 Service Manual

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

4.3.3 High Phase Error

⚫
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
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