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CCS Technical Documentation
RH-42 Series Transceivers
Troubleshooting Instructions
Issue 2 09/2003 Confidential Nokia Corporation
RH-42
Troubleshooting Instructions CCS Technical Documentation
Page 2 Nokia Corporation Confidential Issue 2 09/2003
RH-42
CCS Technical Documentation Troubleshooting Instructions
Contents
Page No
Transceiver Troubleshooting ......................................................................................... 5
Baseband Troubleshooting ..........................................................................................5
General testing........................................................................................................... 5
Troubleshooting ........................................................................................................ 5
Power up faults.......................................................................................................... 6
Flash Programming does not work.......................................................................... 10
Charging .................................................................................................................. 12
Audio failures.......................................................................................................... 13
Accessory detection................................................................................................. 16
Sleep Clock ............................................................................................................. 17
Display/Keyboard lights do not work ..................................................................... 18
Display does not work............................................................................................. 19
Buzzer does not work.............................................................................................. 20
Keyboard does not work ......................................................................................... 20
Receiver Troubleshooting ..........................................................................................20
General instructions for RX troubleshooting .......................................................... 20
Path of the received signal ...................................................................................... 20
Fault-finding charts for receiver chain .................................................................... 21
Transmitter Troubleshooting .....................................................................................24
General instructions for TX troubleshooting .......................................................... 24
Path of the transmitted signall................................................................................. 24
Fault-finding charts for the transmitter ................................................................... 24
Synthesizer Troubleshooting .....................................................................................28
19.44 MHz reference oscillator ............................................................................... 28
RX VHF .................................................................................................................. 29
Fault-finding chart for RX VHF VCO ................................................................... 30
TX VHF................................................................................................................... 30
UHF Synthesizer ..................................................................................................... 31
Issue 2 09/2003 Nokia Corporation Confidential Page 3
RH-42
Troubleshooting Instructions CCS Technical Documentation
Page 4 Nokia Corporation Confidential Issue 2 09/2003
RH-42
CCS Technical Documentation Troubleshooting Instructions
Transceiver Troubleshooting
First, carry out a thorough visual check of the module. Make sure that: