Lenovo S960 Manuale di servizio - Pagina 32
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LENOVO S960 Cellphone Service Manual
4.4 WCDMA comprehensive test
Problem: ACLR or SEM.
Reason: It's not calibrated; or WCDMA PA (U2202, U2203) has a dry joint problem; or RF receiver
and transmitter (U2105) is faulty.
Troubleshooting:
Re-perform WCDMA calibration. Then check
whether the problem is fixed.
Re-solder PA (U2202, U2203) or
replace PA and components in
emission channel. Then check
whether the problem is fixed.
Re-solder or replace the
receiver and transmitter.
Problem: PowerControl
Reason: It's not calibrated; or just passed the critical point of calibration.
Troubleshooting: Re-calibrate.
4.4.1 ACLR or SEM
ACLR or SEM
N
N
4.4.2 The
comprehensive test are not good.
Page 32
results
of
PowerControl