NHL-10
CCS Technical Documentation RF Troubleshooting
6 COMPANY CONFIDENTIAL ISSUE 2 01/2004
Copyright © 2003 Nokia. All Rights Reserved.
General troubleshooting
The first step of fault-finding should always be a visual inspection. Carefully inspect the RF area
using a microscope and look for cracks, solder bridges, dry joints, missing components, com-
ponents that have partially come off and other anomalies. Capacitors can be checked to see
that they are not short-circuited, and inductors that they are not open circuits. Also check that
power supply lines are not short-circuited, i.e. not 0Ω to ground.
Instruments needed for trouble-shooting (minimum requirement):
• Oscilloscope
• Multimeter
• Spectrum analyzer (SA)
Note:
Use an attenuator at the spectrum analyzer input to ensure that the SA will not become damaged by
excessive input power from the phone. Check the spectrum analyzer for maximum allowable input
power.
• Power supply that can deliver at least 2Adc
• Nokia 6600 module jig (also called test jig)
• PC with Phoenix installed
Note:
In this text the following terms are used interchangeably:
GSM900 = EGSM900 = EGSM
GSM1800 = DCS band
GSM1900 = PCS band
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