Nokia N80 - Table of Contents

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Table of Contents

Introduction to RF troubleshooting.....................................................................................................................7–5

RF key component placement...............................................................................................................................7–6

Self test troubleshooting.......................................................................................................................................7–8

RF ASIC troubleshooting.........................................................................................................................................7–9

RF ASIC test points................................................................................................................................................7–10

Synthesizer troubleshooting...............................................................................................................................7–11

Synthesizer test points........................................................................................................................................7–12

Receiver troubleshooting....................................................................................................................................7–12

Introduction to Rx troubleshooting..............................................................................................................7–12

GSM Rx chain activation for manual measurements / GSM RSSI measurement........................................7–13

WCDMA Rx chain activation for manual measurement...............................................................................7–13

WCDMA RSSI measurement............................................................................................................................7–14

GSM receiver troubleshooting........................................................................................................................7–16

WCDMA receiver troubleshooting..................................................................................................................7–17

Receiver test points.........................................................................................................................................7–18

Transmitter troubleshooting..............................................................................................................................7–18

General instructions for Tx troubleshooting................................................................................................7–18

GSM transmitter troubleshooting..................................................................................................................7–22

WCDMA transmitter troubleshooting............................................................................................................7–23

Transmitter test points...................................................................................................................................7–23

Power amplifier (PA) and switch mode power supply (SMPS) troubleshooting............................................7–24

RF tunings.............................................................................................................................................................7–25

Introduction to RF tunings.............................................................................................................................7–25

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............................................................................................................................7–40

Tx IQ tuning (GSM).................................................................................................................................7–40

Tx power level tuning (GSM)................................................................................................................7–42

WCDMA receiver tunings............................................................................................................................7–46

RX calibration (WCDMA)........................................................................................................................7–46

WCDMA transmitter tunings......................................................................................................................7–49

Tx AGC & power detector (WCDMA).....................................................................................................7–49

Tx band response calibration (WCDMA)..............................................................................................7–55

Tx LO leakage (WCDMA)........................................................................................................................7–57

WLAN transmitter troubleshooting....................................................................................................................7–57

WLAN Tx tuning...............................................................................................................................................7–57

WLAN Tx tests..................................................................................................................................................7–58

List of Tables

Table 11 RF channel filter calibration tuning limits.........................................................................................7–29

Table 12 Temperature sensor calibration tuning limits..................................................................................7–30

RM-91; RM-92

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –3