Nokia N72 Service Manual page 111

RM-180
BB Troubleshooting and Tuning Guide
Baseband troubleshooting....................................................................................................................................6-5
Dead or jammed device troubleshooting............................................................................................................6-7
General power checking troubleshooting...........................................................................................................6-9
Clocking troubleshooting....................................................................................................................................6-10
Application processor troubleshooting.............................................................................................................6-11
Charging troubleshooting...................................................................................................................................6-14
Battery current measuring fault troubleshooting............................................................................................6-15
Flash programming fault troubleshooting........................................................................................................6-16
CMT SDRAM memory troubleshooting................................................................................................................6-19
CMT NOR flash fault troubleshooting..................................................................................................................6-21
Application processor memory troubleshooting..............................................................................................6-23
Power key troubleshooting.................................................................................................................................6-25
USB interface troubleshooting............................................................................................................................6-26
SIM card troubleshooting....................................................................................................................................6-29
MMC troubleshooting...........................................................................................................................................6-31
Keyboard troubleshooting..................................................................................................................................6-33
Slider switch troubleshooting.............................................................................................................................6-35
FM radio troubleshooting....................................................................................................................................6-36
Certificate restoring for BB5.0 products............................................................................................................6-37
Display module troubleshooting........................................................................................................................6-42
General instructions for display troubleshooting........................................................................................6-42
Display fault troubleshooting........................................................................................................................6-44
Display and keyboard backlight troubleshooting........................................................................................6-45
ALS troubleshooting........................................................................................................................................6-46
LED driver troubleshooting............................................................................................................................6-49
Bluetooth troubleshooting..................................................................................................................................6-50
Introduction to Bluetooth troubleshooting.................................................................................................6-50
Bluetooth settings for Phoenix......................................................................................................................6-51
Bluetooth self tests in Phoenix......................................................................................................................6-52
Bluetooth troubleshooting............................................................................................................................6-54
Bluetooth BER failure troubleshooting.........................................................................................................6-55
BT audio failure troubleshooting..................................................................................................................6-57
Audio troubleshooting.........................................................................................................................................6-58
Audio troubleshooting test instructions......................................................................................................6-58
Internal earpiece troubleshooting................................................................................................................6-62
Internal microphone troubleshooting..........................................................................................................6-63
IHF troubleshooting........................................................................................................................................6-64
External microphone troubleshooting..........................................................................................................6-65
External earpiece troubleshooting................................................................................................................6-66
Vibra troubleshooting....................................................................................................................................6-67
Baseband manual tuning guide.........................................................................................................................6-68
Energy management calibration...................................................................................................................6-68
List of Tables
Table 8 Display module troubleshooting cases................................................................................................6-42
Table 9 Pixel defects............................................................................................................................................6-42
Table 10 Calibration value limits........................................................................................................................6-68
Issue 1
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