User Guide

Nokia Customer Care 6(a) - Baseband Troubleshooting
Company Confidential RH-51/52, RH-67/68
Issue 3 09/2004 © 2004 Nokia Corporation. Page 3
Table of contents
Page No
Baseband troubleshooting .....................................................................................................................7
Dead or jammed phone ....................................................................................................................... 8
BB selftest tools ....................................................................................................................................9
Flash programming fault ..................................................................................................................10
General power checking ...................................................................................................................12
Test points for regulators ...............................................................................................................12
Baseband serial interface troubleshooting .................................................................................14
CBUS.....................................................................................................................................................14
FBUS .....................................................................................................................................................15
MBUS....................................................................................................................................................15
Charger interface troubleshooting ................................................................................................17
Energy management calibration ....................................................................................................18
Troubleshooting tips ..........................................................................................................................18
ADC-offset over limits.....................................................................................................................18
BSI gain over limits ..........................................................................................................................18
Vbatt offset and gain.......................................................................................................................18
VCHAR over limits ............................................................................................................................19
ICHAR over limits..............................................................................................................................19
ADC reading........................................................................................................................................19
Backup battery ....................................................................................................................................20
USB interface troubleshooting .......................................................................................................21
SIM card fault ......................................................................................................................................22
“Insert SIM Card” in device display although card is inserted ..............................................24
Keypad interface fault ......................................................................................................................25
Display fault .........................................................................................................................................27
Illumination fault (display/keyboard backlight) .........................................................................28
MMC interface fault ..........................................................................................................................30
Audio troubleshooting ......................................................................................................................31
Internal microphone ........................................................................................................................31
External microphone........................................................................................................................32
Internal earpiece...............................................................................................................................33
External earpiece ..............................................................................................................................34
IHF.........................................................................................................................................................35
Accessory detection troubleshooting ...........................................................................................36
Camera module troubleshooting ...................................................................................................38
Terms ....................................................................................................................................................38
Image taking condition effect on image quality .......................................................................39
Distance to target.............................................................................................................................39
Sharpness of picture edges............................................................................................................39
Geometrical distortion ....................................................................................................................39
Amount of light available...............................................................................................................40
Movement in bright light...............................................................................................................40
Temperature .......................................................................................................................................40
Display..................................................................................................................................................41
Basic rules of photography, especially shooting against light ............................................41
Flicker........................................................................................................................
...........................41
Bright light outside of image view..............................................................................................42