Table of Contents
General RF troubleshooting ..................................................................................................................................4–7
General RF troubleshooting .............................................................................................................................4–7
RF key components ...........................................................................................................................................4–8
Auto tuning..................................................................................................................................................... 4–10
RM-258 receiver .................................................................................................................................................. 4–11
General instructions for GSM900 RX troubleshooting ................................................................................ 4–11
Troubleshooting diagram for GSM900 receiver .......................................................................................... 4–13
General instructions for GSM 1800 RX troubleshooting ............................................................................. 4–14
Troubleshooting diagram for GSM1800 receiver ........................................................................................ 4–16
Measurement points in the receiver ............................................................................................................ 4–17
RM-258 transmitter............................................................................................................................................. 4–18
General instructions for GSM 900 TX troubleshooting................................................................................ 4–18
Troubleshooting diagram for GSM900 transmitter .................................................................................... 4–20
GSM900 TX output power.............................................................................................................................. 4–20
General instructions for GSM1800 TX troubleshooting .............................................................................. 4–23
Troubleshooting diagram for GSM1800 transmitter .................................................................................. 4–25
GSM1800 TX output power............................................................................................................................ 4–25
RM-259 receiver................................................................................................................................................... 4–28
General instructions for GSM 850 RX troubleshooting ............................................................................... 4–28
Troubleshooting diagram for GSM850 receiver .......................................................................................... 4–30
General instructions for GSM1900 RX troubleshooting .............................................................................. 4–31
Troubleshooting diagram for GSM1900 receiver ........................................................................................ 4–33
Measurement points in the receiver ............................................................................................................ 4–35
RM-259 transmitter ............................................................................................................................................ 4–36
General instructions for GSM 850 TX troubleshooting................................................................................ 4–36
Troubleshooting diagram for GSM850 transmitter .................................................................................... 4–38
GSM850 TX output power.............................................................................................................................. 4–39
General instructions for GSM1900 TX troubleshooting .............................................................................. 4–41
Troubleshooting diagram for GSM1900 transmitter .................................................................................. 4–43
GSM1900 TX output power............................................................................................................................ 4–44
Synthesizer troubleshooting ............................................................................................................................. 4–46
Introduction.................................................................................................................................................... 4–46
Troubleshooting diagram for PLL synthesizer ............................................................................................ 4–48
Measurement points at the VCXO ................................................................................................................. 4–49
FM radio and bluetooth troubleshooting ......................................................................................................... 4–49
Measurement settings ................................................................................................................................... 4–49
Troubleshooting diagram for FM radio........................................................................................................ 4–51
Bluetooth and FM radio test points.............................................................................................................. 4–52
Introduction to Bluetooth troubleshooting ................................................................................................ 4–52
Bluetooth settings for Phoenix..................................................................................................................... 4–53
Bluetooth self tests in Phoenix..................................................................................................................... 4–54
Bluetooth BER failure troubleshooting........................................................................................................ 4–55
Bluetooth audio and UI activation troubleshooting .................................................................................. 4–57
Antenna troubleshooting ................................................................................................................................... 4–59
Antenna troubleshooting diagram............................................................................................................... 4–59
List of Figures
Figure 29 RF key components on PWB.................................................................................................................4–8
Figure 30 Supply points at UEM (D2200)..............................................................................................................4–9
RM-258; RM-259
RF Troubleshooting Instructions
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2007 Nokia. All rights reserved.
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