User Guide

Table of Contents
Introduction to RF troubleshooting .....................................................................................................................7–5
RF key component placement...............................................................................................................................7–6
Self test troubleshooting.......................................................................................................................................7–7
RF ASIC troubleshooting ........................................................................................................................................7–8
RF ASIC test points..................................................................................................................................................7–9
Synthesizer troubleshooting.............................................................................................................................. 7–10
Synthesizer test points ....................................................................................................................................... 7–11
Receiver troubleshooting ................................................................................................................................... 7–11
Introduction to Rx troubleshooting ............................................................................................................. 7–11
GSM Rx chain activation for manual measurements / GSM RSSI measurement....................................... 7–12
WCDMA Rx chain activation for manual measurement .............................................................................. 7–13
WCDMA RSSI measurement ........................................................................................................................... 7–13
GSM receiver troubleshooting....................................................................................................................... 7–15
WCDMA receiver troubleshooting................................................................................................................. 7–16
Receiver test points........................................................................................................................................ 7–17
Transmitter troubleshooting ............................................................................................................................. 7–17
General instructions for Tx troubleshooting ............................................................................................... 7–17
GSM transmitter troubleshooting................................................................................................................. 7–21
WCDMA transmitter troubleshooting ........................................................................................................... 7–22
Transmitter test points.................................................................................................................................. 7–23
Power amplifier (PA) and switch mode power supply (SMPS) troubleshooting........................................... 7–24
RF tunings ............................................................................................................................................................ 7–24
Introduction to RF tunings............................................................................................................................ 7–24
RF autotuning................................................................................................................................................. 7–25
RF manual tuning guide ................................................................................................................................ 7–28
Required manual tunings after component changes............................................................................ 7–28
System mode independent manual tunings.......................................................................................... 7–29
RF channel filter calibration................................................................................................................ 7–29
PA (power amplifier) detection .......................................................................................................... 7–29
Temperature sensor calibration ........................................................................................................ 7–30
GSM receiver tunings................................................................................................................................. 7–30
Rx calibration (GSM)............................................................................................................................. 7–30
Rx band filter response compensation (GSM) ................................................................................... 7–34
GSM transmitter tunings........................................................................................................................... 7–39
Tx IQ tuning (GSM)................................................................................................................................ 7–39
Tx power level tuning (GSM) ............................................................................................................... 7–41
WCDMA receiver tunings........................................................................................................................... 7–45
RX calibration (WCDMA)....................................................................................................................... 7–45
WCDMA transmitter tunings..................................................................................................................... 7–47
Tx AGC & power detector (WCDMA) .................................................................................................... 7–47
Tx band response calibration (WCDMA)............................................................................................. 7–53
Tx LO leakage (WCDMA) ....................................................................................................................... 7–55
WLAN transmitter troubleshooting................................................................................................................... 7–55
WLAN Tx tuning.............................................................................................................................................. 7–55
WLAN Tx tests ................................................................................................................................................. 7–56
List of Tables
Table 13 RF channel filter calibration tuning limits ........................................................................................ 7–29
Table 14 Temperature sensor calibration tuning limits ................................................................................. 7–30
RM-100
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 2 COMPANY CONFIDENTIAL Page 7 –3
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