CCS Technical Documentation
Troubleshooting Instructions
NSB-9
Issue 1 04/03
Nokia Corporation
Page 3
Table of Contents
Page No
RF Troubleshooting ....................................................................................................... 4
Introduction ..................................................................................................................4
EQUIPMENT NEEDED:.......................................................................................... 4
USEFUL HINTS ....................................................................................................... 4
TROUBLESHOOTING IN CASE OF RF TUNING FAIL ........................................5
Channel Select Filter Calibration .............................................................................. 5
RX Calibration .......................................................................................................... 5
RX AM Suppression Calibration .............................................................................. 5
RX Band Filter Response Compensation.................................................................. 5
TX Power Level Tuning............................................................................................ 5
TX IQ Tuning............................................................................................................ 5
TX 850 Troubleshooting ..............................................................................................6
Phoenix commands ................................................................................................... 6
TX1900 TROUBLESHOOTING ................................................................................9
Phoenix commands ................................................................................................... 9
RX850 troubleshooting ..............................................................................................12
Phoenix commands ................................................................................................. 12
RX1900 Troubleshooting ..........................................................................................15
Phoenix commands ................................................................................................. 15
Figures of signals and voltages in testpoints .............................................................18
FM Radio Troubleshooting ........................................................................................35
Introduction ............................................................................................................. 35
EQUIPMENT NEEDED......................................................................................... 35
FM RADIO SCHEMATICS ......................................................................................36
FM Radio layout...................................................................................................... 39
REFERENCE MEASUREMENT RESULTS ........................................................ 42
Baseband Troubleshooting........................................................................................... 45
PWB Test points ........................................................................................................45
Troubleshooting steps ................................................................................................51
Main troubleshooting tree ..........................................................................................53
Phone is dead .............................................................................................................55
Flash faults .................................................................................................................56
Phone is jammed ......................................................................................................58
Charging fault ............................................................................................................60
SIM card fault ............................................................................................................61
Audio faults ...............................................................................................................62
Display faults .............................................................................................................70
Keypad faults .............................................................................................................72
Flip faults ...................................................................................................................76
FM Radio doesn’t work .............................................................................................78