User Guide

Issue 1 04/2005 COMPANY CONFIDENTIAL 17
Copyright © 2005 Nokia. All Rights Reserved.
RM-94
6(b) - RF Troubleshooting Nokia Customer Care
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
Re-solder capacitor array C7523
Receiver
Fault Finding Tree
part 10
Channel select filter fault finding
Continue measurement only when channel select filter calibration failed
Change RF
ASIC (Helgo)
Phoenix:
Phone: local mode
RF Controls
:
Active Unit: Rx
Op. Mode:
Burst
Rx/Tx channel: default (mid)
AGC: 14
NoYes
No
Repair finished
Re-calibrate
Channel Select Filter
Calibration ok ?
Make sure that Synthesizer is
working and supply voltages of
RF ASIC are ok
Make following tunings/calibrations
x
Tx power level tuning
x
Tx IQ tuning
x Rx calibration
x
Rx Band Filter Response Calib.