Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone 3220 06(b)-rh37-rf-trouble
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Nokia Customer Care
RH-37 Series Transceivers
6(b) - RF Troubleshooting
Instructions
Issue 1 07/04 2004 Nokia Corporation Page 1
Company Confidential
RH-37
6(b) - RF Troubleshooting Instructions Nokia Customer Care
[This page left intentionally blank]
Page 2 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(b) - RF Troubleshooting Instructions
Table of Contents
Page No
General Information on RF Troubleshooting.................................................................................... 5
Test environment .................................................................................................................................. 5
Test conditions ...................................................................................................................................... 6
Receiver Verification and Troubleshooting ...................................................................................... 7
General instructions for RX troubleshooting ................................................................................ 7
Measuring RX I/Q signals using RSSI reading .............................................................................. 7
Measuring RX performance using SNR measurement ............................................................ 9
Measuring front-end power levels using spectrum analyzer............................................. 10
Measuring analogue RX I/Q signals using oscilloscope....................................................... 11
Fault finding chart of the receiver ................................................................................................12
Transmitter ............................................................................................................................................. 19
General instructions for TX troubleshooting ..............................................................................19
GSM900 transmitter ..........................................................................................................................19
General instructions for GSM TX troubleshooting ................................................................ 19
Fault finding chart for GSM900 transmitter .......................................................................... 22
GSM1800 transmitter .......................................................................................................................24
General instructions for GSM1800 TX troubleshooting ...................................................... 24
Fault finding chart for GSM1800 transmitter........................................................................ 26
GSM1900 transmitter .......................................................................................................................28
General instructions for GSM1900 TX troubleshooting ...................................................... 28
Fault finding chart for GSM1900 transmitter........................................................................ 30
Synthesizer ............................................................................................................................................. 33
General instructions for synthesizer troubleshooting ..............................................................33
Checking synthesizer operation .....................................................................................................33
Fault finding chart for PLL synthesizer ........................................................................................36
Frequency tables .................................................................................................................................38
GSM900 (including EGSM900) ................................................................................................... 38
GSM1800 .......................................................................................................................................... 39
GSM1900 .......................................................................................................................................... 41
DC Supply Voltage Check ................................................................................................................... 43
Appendix 6A: Test Points..................................................................................................... 45
Receiver test points ...........................................................................................................................47
Transmitter test points ......................................................................................................................49
Synthesizer test points ......................................................................................................................52
Issue 1 07/04 Nokia Corporation Page 1
RH-37
6(b) - RF Troubleshooting Instructions Nokia Customer Care
[This page left intentionally blank]
Page 2 Nokia Corporation Issue 1 07/04
RH-37
Nokia Customer Care 6(b) - RF Troubleshooting Instructions
General Information on RF Troubleshooting
Notes:
Several bills of material (BOM): There are two different kinds of VCOs, VCTXOs, RF-PAs, SAW-fil-
ters and Antenna Switches (ASM) assembled. They may only be replaced with the same type as the
original component (from the same manufacturer).
Phoenix version: In this document there are example measurements being depicted with pictures of
AMS-Phoenix, version A 2004.06.1.69. In later versions pictures of menus and windows may look dif-
ferently.
Layout version: The drawings of test points and component placement in this version of the document
are taken from build B4.0 layout (1cna_41). If you use the document for newer layout versions, make
sure to use the corresponding assembly and test point drawings.
Test environment
It is assumed, that the phones are disassembled and tested with a repair jig MJ-22R.
The following measurements have to be done for repairing the phone boards:
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