User Guide

CCS Technical Documentation Troubleshooting
NPM-2NX
Issue 1 07/02 ãNokia Corporation Page 3
Fault finding chart for 19.2 MHz oscillator ............................................................ 55
RX VHF VCO ...........................................................................................................55
Fault finding chart for RX VHF VCO .................................................................... 55
BB PLL ......................................................................................................................56
Fault finding chart for BB PLL............................................................................... 57
TX VHF VCO ............................................................................................................58
Fault finding chart for TX VHF VCO..................................................................... 58
UHF SYNTHESIZER ...............................................................................................59
Fault finding chart for UHF SYNTHESIZER......................................................... 60
Description of NPM-2NX RF Auto-tune Tuning ........................................................ 61
TDMA RF tunings .....................................................................................................61
TDMA RX tunings.................................................................................................. 61
TDMA TX tunings.................................................................................................. 62
GSM RF tunings ........................................................................................................64
GSM RX tunings..................................................................................................... 64
GSM TX tunings..................................................................................................... 66
List of Figures
Fig 1 UEM regulator's filter capacitors................................................................................5
Fig 2 BB testpoints ..............................................................................................................6
Fig 3 Power up sequence .....................................................................................................9
Fig 4 Fault tree, phone does not power up...........................................................................11
Fig 5 Fault tree, charging ....................................................................................................15
Fig 6 Fault tree, earpiece fail ..............................................................................................17
Fig 7 Fault tree, microphone fail .........................................................................................18
Fig 8 Fault tree, accessory detection ...................................................................................19
Fig 9 Fault tree, data cable...................................................................................................20
Fig 10 Fault tree, sleep clock...............................................................................................21
Fig 11 Fault tree, Display/Keyboard lights..........................................................................22
Fig 12 Fault tree, display ....................................................................................................23
Fig 13 Fault tree, infra red ...................................................................................................25