User Guide

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Table of Contents

General RF troubleshooting ..................................................................................................................................5–5

Introduction to RF troubleshooting ................................................................................................................5–5

RF key components ...........................................................................................................................................5–6

Non-replaceable RF components.....................................................................................................................5–7

General voltage checking .................................................................................................................................5–8

Phoenix self tests ..............................................................................................................................................5–9

Receiver troubleshooting ................................................................................................................................... 5–10

Introduction to receiver (RX) troubleshooting............................................................................................ 5–10

VCTCXO troubleshooting ................................................................................................................................ 5–11

RX GSM850 troubleshooting.......................................................................................................................... 5–12

RX GSM900 troubleshooting.......................................................................................................................... 5–13

RX GSM1800 troubleshooting........................................................................................................................ 5–14

RX GSM1900 troubleshooting........................................................................................................................ 5–15

GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 5–16

WCDMA receiver troubleshooting................................................................................................................. 5–17

WCDMA RX chain activation for manual measurement.............................................................................. 5–18

WCDMA RSSI measurement ........................................................................................................................... 5–19

Transmitter troubleshooting ............................................................................................................................. 5–19

General instructions for transmitter (TX) troubleshooting........................................................................ 5–19

GSM transmitter troubleshooting................................................................................................................. 5–20

TX 850/900 troubleshooting......................................................................................................................... 5–22

TX 1800/1900 troubleshooting..................................................................................................................... 5–23

Checking antenna functionality.................................................................................................................... 5–24

WCDMA transmitter troubleshooting ........................................................................................................... 5–26

WCDMA transmitter troubleshooting flowchart.......................................................................................... 5–28

RF tunings ............................................................................................................................................................ 5–28

Introduction to RF tunings............................................................................................................................ 5–28

Autotuning for BB5 ........................................................................................................................................ 5–29

System mode independent manual tunings .................................................................................................... 5–30

RF channel filter calibration.......................................................................................................................... 5–30

PA (power amplifier) detection .................................................................................................................... 5–30

GSM receiver tunings........................................................................................................................................... 5–31

Rx calibration (GSM) ....................................................................................................................................... 5–31

Rx band filter response compensation (GSM).............................................................................................. 5–34

GSM transmitter tunings..................................................................................................................................... 5–37

Tx IQ tuning (GSM).......................................................................................................................................... 5–37

Tx power level tuning (GSM) ......................................................................................................................... 5–39

WCDMA receiver tunings..................................................................................................................................... 5–41

RX calibration (WCDMA) ................................................................................................................................. 5–41

WCDMA transmitter tunings............................................................................................................................... 5–44

Tx AGC & power detector (WCDMA)............................................................................................................... 5–44

Tx band response calibration (WCDMA) ....................................................................................................... 5–50

Tx LO leakage (WCDMA) ................................................................................................................................. 5–52

List of Tables

Table 6 Rf channel filter calibration tuning limits ........................................................................................... 5–30

Table 7 RF tuning limits in Rx calibration......................................................................................................... 5–33

RM-135

RF troubleshooting Nokia Customer Care

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