Table Of Contents - Nokia NKC-1X Series Troubleshooting Instructions

NKC-1X
Troubleshooting Instructions

Table of Contents

Transceiver Troubleshooting ......................................................................................... 4
Baseband Troubleshooting ..........................................................................................4
General about testing................................................................................................. 4
Troubleshooting ........................................................................................................ 4
Power up faults.......................................................................................................... 5
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
Keyboard does not work ......................................................................................... 20
Receiver Troubleshooting ..........................................................................................21
General instructions for RX troubleshooting .......................................................... 21
Path of the received signal ...................................................................................... 21
Fault finding charts for receiver chain .................................................................... 21
Transmitter Troubleshooting .....................................................................................25
General instructions for TX troubleshooting .......................................................... 25
Path of the transmitted signall ................................................................................. 25
Fault finding charts for the transmitter.................................................................... 25
Synthesizer Troubleshooting .....................................................................................29
19.44 MHz reference oscillator ............................................................................... 29
RX VHF .................................................................................................................. 31
TX VHF................................................................................................................... 32
UHF SYNTHESIZER ............................................................................................. 33
Page 2
Nokia Corporation
CCS Technical Documentation
Issue 1 02/03
Page No