Nokia RM-505, Service Manual

Page: 135 / 264

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 RF tunings ............................................................................................................................... 4–6
Auto tuning ........................................................................................................................................................ 4–6
Self Test Troubleshooting ...................................................................................................................................... 4–7
Troubleshooting with RF Self tests .................................................................................................................. 4–7
Receiver Troubleshooting .................................................................................................................................. 4–20
Introduction to receiver (RX) troubleshooting ............................................................................................ 4–20
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–21
GSM receiver troubleshooting flowchart ..................................................................................................... 4–22
WCDMA RX chain activation for manual measurement .............................................................................. 4–22
WCDMA RSSI measurement ........................................................................................................................... 4–23
WCDMA receiver troubleshooting flowchart ................................................................................................ 4–25
Transmitter Troubleshooting ............................................................................................................................. 4–25
General instructions for transmitter (TX) troubleshooting ........................................................................ 4–25
GSM transmitter troubleshooting ................................................................................................................. 4–26
WCDMA transmitter troubleshooting ........................................................................................................... 4–28
Antenna Troubleshooting .................................................................................................................................. 4–29
Antenna troubleshooting .............................................................................................................................. 4–29
List of Figures
Figure 42 RF key components ............................................................................................................................... 4–6
Figure 43 Phoenix GSM RSSI reading window .................................................................................................. 4–21
Figure 44 Phoenix WCDMA RX Control window ................................................................................................ 4–23
Figure 45 WCDMA RX generator settings .......................................................................................................... 4–24
Figure 46 Phoenix WCDMA RX power measurement window ........................................................................ 4–24
Figure 47 Phoenix GSM RF controls window ..................................................................................................... 4–26
Figure 48 Antenna contacts ............................................................................................................................... 4–30
Figure 49 Antenna contact clips on PWB .......................................................................................................... 4–30
Figure 50 Antenna matching components on PWB ......................................................................................... 4–31
RM-505; RM-506
RF Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2009 Nokia. All rights reserved.