Table Of Contents - Nokia NEM-4 Series Troubleshooting Instructions

CCS Technical Documentation
Introduction to NEM-4 Troubleshooting ....................................................................... 3
General guidelines for NEM-4 trouble shooting............................................................ 3
Tools needed for Troubleshooting ...............................................................................3
General guidelines .......................................................................................................3
Nominal current consumption .....................................................................................4
Troubleshooting paths.................................................................................................... 5
Dead or jammed device ...............................................................................................5
Partially damaged device .............................................................................................6
Most common symptoms reported by customer ..........................................................6
ASIC is changed ..........................................................................................................7
Test points ....................................................................................................................7
"CONTACT SERVICE" on display ..........................................................................10
Baseband HW subarea Troubleshooting...................................................................... 11
Flashing Troubleshooting ..........................................................................................11
ADSP flashing Troubleshooting ................................................................................13
Energy management Troubleshooting .......................................................................14
Audio Troubleshooting ..............................................................................................31
Headset Troubleshooting ...........................................................................................35
Memory Troubleshooting ..........................................................................................37
MMC Troubleshooting ..............................................................................................38
VIBRA .......................................................................................................................40
ZOCUS ......................................................................................................................41
UI Troubleshooting ...................................................................................................... 41
UI Troubleshooting cases ..........................................................................................41
Keymat Backlight ......................................................................................................42
Keyboard ....................................................................................................................43
Display blank .............................................................................................................44
Backlight does not turn on .........................................................................................45
FM Radio Troubleshooting.......................................................................................... 46
FM Radio component layout .....................................................................................46
FM Radio Troubleshooting diagram .........................................................................48
RF Troubleshooting ..................................................................................................... 53
Abbreviations in fault finding charts .........................................................................53
Introduction ................................................................................................................53
RF Key component placement ...................................................................................54
RF Measurement points .............................................................................................55
RF in general ................................................................................................................ 58
RF Power Supply Configuration.................................................................................. 61
Receiver ....................................................................................................................... 62
General instructions for RX Troubleshooting ...........................................................62
Receiver fault finding ................................................................................................66
Rx Signal paths ..........................................................................................................68
Transmitter ................................................................................................................... 70
General instructions for EGSM TX Troubleshooting ...............................................70
TX Path of the transmitted EGSM900 signal ............................................................79
General instructions for GSM1800/1900 TX Troubleshooting .................................83
DCS 1800/PCS 1900 Tx fault finding flow chart ......................................................83
Path of the transmitted GSM1800/1900 signal ..........................................................84
Draft 2 8/2003
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NEM-4
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