Nokia RM-509 - Section 4

Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–6
Auto tuning.............................................................................................................................................................4–6
Introduction to auto tuning.............................................................................................................................4–6
Auto tuning procedure .....................................................................................................................................4–7
Self test troubleshooting.......................................................................................................................................4–7
Phoenix self test troubleshooting ...................................................................................................................4–7
Receiver troubleshooting ......................................................................................................................................4–9
Introduction to receiver (RX) troubleshooting...............................................................................................4–9
GSM RX chain activation for manual measurements/GSM RSSI measurement ...........................................4–9
GSM receiver troubleshooting flowchart ..................................................................................................... 4–10
WCDMA RX chain activation for manual measurement.............................................................................. 4–11
WCDMA RSSI measurement ........................................................................................................................... 4–12
WCDMA receiver troubleshooting flowchart................................................................................................ 4–13
Transmitter troubleshooting ............................................................................................................................. 4–14
Introduction to transmitter (TX) troubleshooting...................................................................................... 4–14
GSM transmitter troubleshooting................................................................................................................. 4–14
GSM transmitter troubleshooting flowchart ............................................................................................... 4–18
WCDMA transmitter troubleshooting ........................................................................................................... 4–19
WCDMA transmitter troubleshooting flowchart.......................................................................................... 4–22
Troubleshooting with RF shield removed......................................................................................................... 4–23
Introduction.................................................................................................................................................... 4–23
Voltage checking ............................................................................................................................................ 4–23
VCTCXO troubleshooting ................................................................................................................................ 4–25
RF component reference ............................................................................................................................... 4–25
Antenna................................................................................................................................................................ 4–26
Antenna overview .......................................................................................................................................... 4–26
Main antenna functionality........................................................................................................................... 4–27
Bluetooth antenna functionality .................................................................................................................. 4–27
GPS antenna functionality............................................................................................................................. 4–28
Antenna troubleshooting.............................................................................................................................. 4–28
List of Figures
Figure 17 RF key components - bottom...............................................................................................................4–6
Figure 18 Auto tuning concept with CMU200......................................................................................................4–7
Figure 19 Phoenix RSSI Reading window ............................................................................................................4–9
Figure 20 Phoenix Rx Control window with sample settings (WCDMA band I)............................................. 4–11
Figure 21 Phoenix Rx Power Measurement window....................................................................................... 4–12
Figure 22 Phoenix RF Controls window ............................................................................................................ 4–14
Figure 23 Typical readings ................................................................................................................................. 4–16
Figure 24 Phoenix WCDMA Tx control window ................................................................................................ 4–19
Figure 25 Typical readings ................................................................................................................................. 4–21
Figure 26 Test points for voltage checking ...................................................................................................... 4–24
Figure 27 Component reference schematics .................................................................................................... 4–26
Figure 28 Antenna contacts ............................................................................................................................... 4–27
Figure 29 BT antenna.......................................................................................................................................... 4–28
Figure 30 GPS antenna and main antenna contact clips................................................................................. 4–28
RM-509; RM-510; RM-511
RF Troubleshooting
Issue 2 COMPANY CONFIDENTIAL Page 4 –3
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