Lenovo S930 Manuale di servizio - Pagina 28

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LENOVO S930 Cellphone Service Manual

4.3.2 WCDMA TPC calibration

Problem: Item TPC failed.

Reason: Emission channel has a problem.

Troubleshooting:

Do RF connector CON2101, PA module

(U2202), C2218 and C2219 have dry joint

problems?

Is WCDMA PA (U2202) fitted

reversely? Or does it have a dry

joint problem?

Is WCDMA RF receiver and

transmitter (U2101) fitted

reversely? Or does it have a dry

joint problem?

TPC failed.

Check whether

connections of RF cable

and fittings are reliable.

Check U1201.

Page 28

Re-connect and

calibrate.

Re-solder.