Nokia n81 Service Manual page 113

RM-179; RM-223
RF troubleshooting
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 ...........................................................................................................................................
Receiver troubleshooting
Introduction to receiver (RX)
VCTCXO troubleshooting
RX GSM850 troubleshooting..........................................................................................................................
RX GSM900 troubleshooting..........................................................................................................................
RX GSM1800 troubleshooting........................................................................................................................
RX GSM1900 troubleshooting........................................................................................................................
GSM RX chain activation for manual measurements/GSM RSSI measurement
WCDMA receiver troubleshooting
WCDMA RX chain activation for manual measurement
WCDMA RSSI measurement
Transmitter troubleshooting
General instructions for transmitter (TX)
GSM transmitter troubleshooting.................................................................................................................
TX 850/900 troubleshooting
TX 1800/1900 troubleshooting.....................................................................................................................
Checking antenna functionality
WCDMA transmitter troubleshooting
WCDMA transmitter troubleshooting
RF tunings ............................................................................................................................................................
Introduction to RF tunings
Autotuning for BB5
System mode independent manual tunings
RF channel filter calibration
PA (power amplifier) detection
GSM receiver tunings...........................................................................................................................................
Rx calibration (GSM)
Rx band filter response compensation
GSM transmitter tunings.....................................................................................................................................
Tx IQ tuning (GSM)..........................................................................................................................................
Tx power level tuning (GSM)
WCDMA receiver tunings
RX calibration (WCDMA)
WCDMA transmitter tunings
Tx AGC & power detector
Tx band response calibration (WCDMA)
Tx LO leakage (WCDMA)
List of Tables
Table 5 Rf channel filter calibration tuning limits
Table 6 RF tuning limits in Rx calibration
Issue 1
Table of Contents
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COMPANY CONFIDENTIAL
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