Nokia RM-243 - Table of Contents

Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–6
Non-replaceable RF components.....................................................................................................................4–7
General voltage checking .................................................................................................................................4–8
Phoenix self tests ..............................................................................................................................................4–9
VCTCXO troubleshooting ..................................................................................................................................... 4–11
Receiver troubleshooting ................................................................................................................................... 4–12
Introduction to receiver (RX) 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 ........................................................................................................... 4–27
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..................................................................................................................................... 4–43
RX calibration (WCDMA) ................................................................................................................................. 4–43
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 12 Rf channel filter calibration tuning limits......................................................................................... 4–31
Table 13 RF tuning limits in Rx calibration....................................................................................................... 4–34
RM-243
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
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