User Guide

NPL-4/5 Company confidential
Troubleshooting Instructions Nokia Customer Care
Page 4 Copyright © 2004 Nokia Corporation. All rights reserved. Issue 1 05/04
GMSK.................................................................................................................................................. 40
EDGE................................................................................................................................................... 41
Fault finding chart for GSM1900 transmitter........................................................................ 42
GMSK.................................................................................................................................................. 43
EDGE................................................................................................................................................... 44
Synthesizer ............................................................................................................................................. 45
Check synthesizer operation ...........................................................................................................45
Reference oscillator 26 MHz (VCTCXO) ........................................................................................46
Voltage Controlled Oscillator (VCO) ..............................................................................................47
Fault finding chart for PLL synthesizer ........................................................................................48
Pictures of synthesizer signals ........................................................................................................49
Frequency tables .................................................................................................................................51
GSM850............................................................................................................................................. 51
GSM900 (including EGSM900)................................................................................................... 52
GSM1800 .......................................................................................................................................... 53
GSM1900 .......................................................................................................................................... 55
DC Supply Current Check ................................................................................................................... 57
Baseband Troubleshooting................................................................................................................. 58
BB measurement points ...................................................................................................................58
Troubleshooting diagrams ................................................................................................................60
Phone is dead. .....................................................................................................................................61
Phone is jammed 1 .............................................................................................................................62
Phone is jammed 2 .............................................................................................................................63
Flash faults 1 .......................................................................................................................................64
Flash faults 2 .......................................................................................................................................65
SIM card faults ....................................................................................................................................66
Charger faults ......................................................................................................................................67
Display faults 1 ...................................................................................................................................68
Display faults 2 ...................................................................................................................................69
Audio fault1 .........................................................................................................................................70
Audio fault 2 .................................................................................................................
.......................71
Audio fault 3 ........................................................................................................................................72
Keyboard faults 1 ...............................................................................................................................73
Keyboard faults 2 ...............................................................................................................................74
Keyboard faults 3 ...............................................................................................................................75
Keyboard faults 4 ...............................................................................................................................76
Keyboard faults 5 ...............................................................................................................................77
Accessory faults1 ................................................................................................................................78
Accessory faults 2 ..............................................................................................................................80
Flashlight faults ..................................................................................................................................82
Self tests ...............................................................................................................................................83
FCI troubleshooting ...........................................................................................................................84
IHF troubleshooting ...........................................................................................................................86
Compass Troubleshooting .................................................................................................................. 87
Calibration 1 ........................................................................................................................................88
Calibration 2 .................................................................................................................
.......................89
Sensor problems 1 ..............................................................................................................................90
Start calibration ..................................................................................................................................91