Nokia N72

Table of Contents
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
RM-180
BB Troubleshooting and Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 6 –3
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