Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–6
Auto tuning for RF ..................................................................................................................................................4–6
General voltage checking ......................................................................................................................................4–7
Selftest troubleshooting........................................................................................................................................4–8
RF selftests ........................................................................................................................................................4–8
Fatal selftests troubleshooting..................................................................................................................... 4–10
Receiver troubleshooting ................................................................................................................................... 4–14
Introduction to receiver (RX) troubleshooting............................................................................................ 4–14
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–15
Transmitter troubleshooting ............................................................................................................................. 4–16
General instructions for transmitter (TX) troubleshooting........................................................................ 4–16
GSM transmitter troubleshooting................................................................................................................. 4–16
Bluetooth and FM radio troubleshooting ......................................................................................................... 4–18
Bluetooth troubleshooting ........................................................................................................................... 4–18
FM radio troubleshooting.............................................................................................................................. 4–19
List of Figures
Figure 16 RF key components ...............................................................................................................................4–6
Figure 17 Auto tuning concept with CMU200......................................................................................................4–6
Figure 18 General voltage checking test points (main board, both sides) ......................................................4–8
Figure 19 Testpoints used after fatal self tests................................................................................................ 4–10
Figure 20 Settings: Time 1ns/d + 0.1Vpp/d ...................................................................................................... 4–12
Figure 21 Settings: Time 1ns/d + 0.3Vpp/d ...................................................................................................... 4–12
Figure 22 Frequency ~ 100kHz........................................................................................................................... 4–14
Figure 23 Typical readings ................................................................................................................................. 4–17
Figure 24 Troubleshooting diagram: Bluetooth .............................................................................................. 4–18
RM-561
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2009 Nokia. All rights reserved.
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