Nokia RM-94 Rf Troubleshooting Instructions page 17

RM-94
6(b) - RF Troubleshooting
Make sure that Synthesizer is
working and supply voltages of
RF ASIC are ok
Phoenix:
Phone: local mode
RF Controls :
Active Unit: Rx
Op. Mode: Burst
Rx/Tx channel: default (mid)
AGC: 14
Signal Generator:
Level: –60dBm
Frequency: 942.4MHz
Offset: 67.71kHz
Oscilloscope:
RF-BB filter signals ok?
TPs: CM_F_Q & CM_F_I
CM_DTOS_Q & CM_DTOS_I
Yes
Repair finished
Issue 1 04/2005
Channel select filter fault finding
Continue measurement only when channel select filter calibration failed
No Re-solder capacitor array C7523
Yes
Make following tunings/calibrations
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Re-calibrate
Channel Select Filter
Calibration ok ?
No
Change RF
ASIC (Helgo)
Tx power level tuning
Tx IQ tuning
Rx calibration
Rx Band Filter Response Calib.
Receiver
Fault Finding Tree
part 10
17