Nokia NEM-4 Series Troubleshooting Instructions page 4
Transceivers
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Also See for NEM-4 Series:
- Disassembly instructions manual (8 pages) ,
- Service tools (22 pages)
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RH-20
Fault finding chart for GSM1800/GSM1900 transmitter ..........................................85
NEM-4 Synthesizer...................................................................................................... 86
General instructions for Synthesizer Troubleshooting ..............................................86
26 MHz reference oscillator (VCXO) .......................................................................90
VCO ...........................................................................................................................90
Fault finding chart for PLL Synthesizer ....................................................................91
PLL Block diagram ....................................................................................................92
PLL power supply ......................................................................................................93
Frequency lists ...........................................................................................................96
Phoenix tuning ............................................................................................................. 99
RF tuning after repairs ...............................................................................................99
RX Calibration (incl. VCXO Calibration) .................................................................99
RX AGC limits ........................................................................................................104
RX Band Filter Response Compensation ................................................................107
TX Power tuning ......................................................................................................114
TX I/Q Tuning .........................................................................................................116
Bluetooth Troubleshooting ......................................................................................130
Page 2
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CCS Technical Documentation
Draft 2 8/2003
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Troubleshooting
