Table of Contents
General RF troubleshooting ..................................................................................................................................4–7
General RF troubleshooting .............................................................................................................................4–7
RF key components ...........................................................................................................................................4–7
Auto tuning........................................................................................................................................................4–9
RM-298 receiver .................................................................................................................................................. 4–10
General instructions for GSM900 RX troubleshooting ................................................................................ 4–10
Troubleshooting diagram for GSM900 receiver .......................................................................................... 4–12
General instructions for GSM 1800 RX troubleshooting ............................................................................. 4–13
Troubleshooting diagram for GSM1800 receiver ........................................................................................ 4–15
Measurement points in the receiver ............................................................................................................ 4–16
RM-298 transmitter............................................................................................................................................. 4–17
General instructions for GSM 900 TX troubleshooting................................................................................ 4–17
Troubleshooting diagram for GSM900 transmitter .................................................................................... 4–19
GSM900 TX output power.............................................................................................................................. 4–19
General instructions for GSM1800 TX troubleshooting .............................................................................. 4–22
Troubleshooting diagram for GSM1800 transmitter .................................................................................. 4–24
GSM1800 TX output power............................................................................................................................ 4–24
RM-299 receiver................................................................................................................................................... 4–27
General instructions for GSM 850 RX troubleshooting ............................................................................... 4–27
Troubleshooting diagram for GSM850 receiver .......................................................................................... 4–29
General instructions for GSM1900 RX troubleshooting .............................................................................. 4–30
Troubleshooting diagram for GSM1900 receiver ........................................................................................ 4–32
Measurement points in the receiver ............................................................................................................ 4–34
RM-299 transmitter ............................................................................................................................................ 4–35
General instructions for GSM 850 TX troubleshooting................................................................................ 4–35
Troubleshooting diagram for GSM850 transmitter .................................................................................... 4–37
GSM850 TX output power.............................................................................................................................. 4–38
General instructions for GSM1900 TX troubleshooting .............................................................................. 4–40
Troubleshooting diagram for GSM1900 transmitter .................................................................................. 4–42
GSM1900 TX output power............................................................................................................................ 4–43
Synthesizer troubleshooting ............................................................................................................................. 4–45
Introduction.................................................................................................................................................... 4–45
Troubleshooting diagram for PLL synthesizer ............................................................................................ 4–47
Measurement points at the VCXO ................................................................................................................. 4–48
FM radio and bluetooth troubleshooting ......................................................................................................... 4–48
Measurement settings ................................................................................................................................... 4–48
Troubleshooting diagram for FM radio........................................................................................................ 4–50
Bluetooth and FM radio test points.............................................................................................................. 4–51
Introduction to Bluetooth troubleshooting ................................................................................................ 4–52
Bluetooth settings for Phoenix..................................................................................................................... 4–52
Bluetooth self tests in Phoenix..................................................................................................................... 4–53
Bluetooth BER failure troubleshooting........................................................................................................ 4–54
Antenna troubleshooting ................................................................................................................................... 4–56
Antenna troubleshooting diagram............................................................................................................... 4–56
List of Figures
Figure 29 RF key components on PWB.................................................................................................................4–7
Figure 30 Supply points at UEM (D2200)..............................................................................................................4–8
Figure 31 Supply point at RF IC (N7600) ..............................................................................................................4–9
RM-298; RM-299
RF Troubleshooting Instructions
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2007 Nokia. All rights reserved.
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