Wcdma Comprehensive Test; Aclr Or Sem - Lenovo A516 Service Manual

Repair Manual of Lenovo A516 Mobile Phone

4.5 WCDMA comprehensive test

4.5.1 ACLR or SEM

Fault: ACLR or SEM
Cause: No calibration or WCDMA PA（U2202,U2203） is in cold solder joint; RF transceiver
(U2105) doesn't work well.
Repair manner:
Whether it is OK after recalibrating WCDMA?
Re-weld PA or replace PA and the devices in
transmission circuit?
Re-weld
transceiver
4.5.2 ILPC comprehensive test abnormal
Fault: ILPC
Cause: No calibration or just passing calibration.
Repair manner: The same as 4.5.1.
4.5.3 FrequencyErr
Fault: FrequencyErr
Cause: No calibration, or suffered outside interference
Repair manner: Recalibrate WCDMA and test; replace U2104.
ACLR or SEM
N
N
or replace
36