RM-11
Troubleshooting - Baseband
Contents
Introduction ..................................................................................................................................................... 3
Power Up and Reset....................................................................................................................................... 6
Power Key ...................................................................................................................................................... 8
Charger is Connected ................................................................................................................................. 8
RTC Alarm ...................................................................................................................................................... 9
Power Off ....................................................................................................................................................... 10
Power ............................................................................................................................................................11
Clock Distribution........................................................................................................................................ 13
RFClk (19.2 MHz Analog) ........................................................................................................................13
RFConvClk (19.2 MHz digital) ................................................................................................................14
CBUSClk Interface .....................................................................................................................................15
DBUS Clk Interface ....................................................................................................................................16
SleepCLK (Digital) ......................................................................................................................................17
SleepCLK (Analog) .....................................................................................................................................18
Charging Operation..................................................................................................................................... 21
Battery ..........................................................................................................................................................21
Charging Circuitry .....................................................................................................................................21
Charger Detection .....................................................................................................................................22
Charge Control ...........................................................................................................................................23
Audio .............................................................................................................................................................23
Display and Keyboard ...............................................................................................................................24
FM Radio ........................................................................................................................................................ 25
FM Radio Test .............................................................................................................................................26
Input Signals to FM Radio................................................................................................................... 26
Accessories .................................................................................................................................................... 29
Charging .......................................................................................................................................................30
FBus Detection ...........................................................................................................................................31
RUIM (SIM CAR)........................................................................................................................................... 34
Test Points...................................................................................................................................................... 35
Troubleshooting............................................................................................................................................ 37
Mobile Terminal is Dead ..........................................................................................................................38
Charger Faults ............................................................................................................................................43
Audio Faults ................................................................................................................................................44
Earpiece .................................................................................................................................................... 44
Microphone ............................................................................................................................................. 45
Vibra .......................................................................................................................................................... 46
Display Faults ..............................................................................................................................................47
Keypad Faults .............................................................................................................................................49
Power Key ................................................................................................................................................ 49
©2005 Nokia Corporation
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