Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
General information on RF troubleshooting ..................................................................................................4–5
RF key components ...........................................................................................................................................4–7
Non-replaceable RF components.....................................................................................................................4–8
General voltage checking .................................................................................................................................4–9
Phoenix self tests ........................................................................................................................................... 4–10
Receiver troubleshooting ................................................................................................................................... 4–11
Introduction to receiver (RX) troubleshooting............................................................................................ 4–11
VCTCXO troubleshooting ................................................................................................................................ 4–12
RX GSM850 troubleshooting.......................................................................................................................... 4–13
RX GSM900 troubleshooting.......................................................................................................................... 4–14
RX GSM1800 troubleshooting........................................................................................................................ 4–15
RX GSM1900 troubleshooting........................................................................................................................ 4–16
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–17
WCDMA receiver troubleshooting................................................................................................................. 4–18
WCDMA RX chain activation for manual measurement.............................................................................. 4–19
WCDMA RSSI measurement ........................................................................................................................... 4–20
Transmitter troubleshooting ............................................................................................................................. 4–20
General instructions for transmitter (TX) troubleshooting........................................................................ 4–20
GSM transmitter troubleshooting................................................................................................................. 4–21
TX 850/900 troubleshooting......................................................................................................................... 4–23
TX 1800/1900 troubleshooting..................................................................................................................... 4–24
Checking antenna functionality.................................................................................................................... 4–25
WCDMA transmitter troubleshooting ........................................................................................................... 4–26
WCDMA transmitter troubleshooting flowchart.......................................................................................... 4–29
RF tunings ............................................................................................................................................................ 4–29
Introduction to RF tunings............................................................................................................................ 4–29
Autotuning for BB5 ........................................................................................................................................ 4–30
System mode independent manual tunings .................................................................................................... 4–31
RF channel filter calibration.......................................................................................................................... 4–31
PA (power amplifier) detection .................................................................................................................... 4–31
GSM receiver tunings........................................................................................................................................... 4–32
Rx calibration (GSM) ....................................................................................................................................... 4–32
Rx band filter response compensation (GSM).............................................................................................. 4–35
GSM transmitter tunings..................................................................................................................................... 4–38
Tx IQ tuning (GSM).......................................................................................................................................... 4–38
Tx power level tuning (GSM) ......................................................................................................................... 4–40
WCDMA receiver tunings..................................................................................................................................... 4–42
RX calibration (WCDMA) ................................................................................................................................. 4–42
WCDMA transmitter tunings............................................................................................................................... 4–45
Tx AGC & power detector (WCDMA)............................................................................................................... 4–45
Tx band response calibration (WCDMA) ....................................................................................................... 4–51
Tx LO leakage (WCDMA) ................................................................................................................................. 4–53
List of Tables
Table 5 Rf channel filter calibration tuning limits ........................................................................................... 4–31
Table 6 RF tuning limits in Rx calibration......................................................................................................... 4–34
RM-179; RM-223
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2007 Nokia. All rights reserved.
To Next Page
Loading...
