Lenovo S930 Manual de serviço - Página 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.
N
N
N
N
N
Check U1201.
Page 28
Y
Re-connect and
calibrate.
Y
Re-solder.
Y
Re-solder.
Y
Re-solder.