Table Of Contents - Nokia NPC-1 Series Troubleshooting Instructions

NPC-1
Troubleshooting Instructions

Table of Contents

Troubleshooting Instructions ..........................................................................................1
Transceiver Troubleshooting ......................................................................................... 4
Baseband Troubleshooting ..........................................................................................4
General about testing................................................................................................. 4
Troubleshooting ........................................................................................................ 5
Power up faults.......................................................................................................... 6
Flash Programming does not work.......................................................................... 10
Charging .................................................................................................................. 12
Audio failures.......................................................................................................... 13
Accessory detection................................................................................................. 15
Sleep Clock ............................................................................................................. 16
Display/Keyboard lights do not work ..................................................................... 18
Display does not work............................................................................................. 19
Buzzer does not work.............................................................................................. 20
Vibra does not work ................................................................................................ 20
Keyboard does not work ......................................................................................... 20
Infrared does not work ............................................................................................ 21
Receiver Troubleshooting ..........................................................................................22
General instructions for RX troubleshooting .......................................................... 22
Path of the received signal ...................................................................................... 22
Fault finding charts for receiver chain .................................................................... 22
Transmitter Troubleshooting .....................................................................................26
General instructions for TX troubleshooting .......................................................... 26
Path of the transmitted signall ................................................................................. 26
Fault finding charts for the transmitter.................................................................... 26
Synthesizer Troubleshooting .....................................................................................30
19.44 MHz reference oscillator ............................................................................... 30
RX VHF VCO......................................................................................................... 31
TX VHF VCO ......................................................................................................... 32
UHF SYNTHESIZER ............................................................................................. 33
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