Nokia RH-109 Service Manual page 64

RH-109
RF troubleshooting
RF self tests in the calibration and test tool.................................................................................................................4-5
General RF troubleshooting...........................................................................................................................................4-6
Introduction to RF troubleshooting...........................................................................................................................4-6
RF key components.....................................................................................................................................................4-7
Hardware set up.........................................................................................................................................................
General voltage checking..............................................................................................................................................
Receiver troubleshooting...............................................................................................................................................4-9
Introduction to receiver (RX) troubleshooting..........................................................................................................4-9
CDMA RX chain activation for manual measurement/WCDMA RSSI
CDMA RX calibration fails in the VGA offset troubleshooting.................................................................................4-10
Transmitter troubleshooting........................................................................................................................................4-13
General instructions for transmitter (TX) Troubleshooting....................................................................................4-13
GPS troubleshooting.......................................................................................................................................................4-18
List of Figures
Figure 4 RF key components..........................................................................................................................................4-7
Figure 5 Tuning concept with CMU200..........................................................................................................................4-8
Figure 6 Troubleshooting diagram: GPS......................................................................................................................4-18
Issue 1
Table of Contents
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
measurement.................................................4-9
4-8
4-8
Page 4-3