User Guide

RH-48
Troubleshooting — BB CCS Technical Documentation
Page 2 © 2003 Nokia Corporation Confidential Issue 1 11/2003
Contents
Page No
Baseband Troubleshooting............................................................................................. 3
RH-48 Baseband Module Overview ............................................................................3
Baseband and RF Architecture ....................................................................................4
Power Up and Reset .................................................................................................. 4
Power up with PWR key........................................................................................... 7
Power up when charger is connected ........................................................................ 7
RTC alarm power up................................................................................................. 8
Power off .....................................................................................................................8
Power Consumption and Operation modes .................................................................8
Power Distribution .......................................................................................................9
Clock Distribution .....................................................................................................11
RFClk (19.2 MHz Analog)...................................................................................... 11
RFConvClk (19.2 MHz digital) .............................................................................. 13
CBUSClk Interface ................................................................................................. 14
DBUS Clk Interface ................................................................................................ 14
SleepCLK (Digital) ................................................................................................. 15
SleepCLK (Analog)................................................................................................. 16
Flash programming ....................................................................................................16
Connections to Baseband ........................................................................................ 16
Baseband Power Up ................................................................................................ 16
Flash Programming Indication................................................................................ 16
Flashing................................................................................................................... 17
Charging operation ...................................................................................................19
Battery ..................................................................................................................... 19
Charging Circuitry................................................................................................... 20
Charger Detection ................................................................................................... 21
Charge Control ........................................................................................................ 21
Audio .........................................................................................................................22
Display and Keyboard ...............................................................................................22
Accessory ...................................................................................................................23
Charging.................................................................................................................. 24
Tomahawk Headset Detection ................................................................................ 26
FBus Detection........................................................................................................ 27
Accessory Detection Through ACI......................................................................... 27
SIM CAR ...................................................................................................................29
Test Points .................................................................................................................30
Troubleshooting .........................................................................................................32
Top troubleshooting map ...........................................................................................33
Phone is totally dead ............................................................................................... 35
Flash programming doesn‘t work ........................................................................... 36
Power doesn‘t stay on or the phone is jammed....................................................... 38
Charger.................................................................................................................... 40
Audio faults............................................................................................................. 41
Display faults........................................................................................................... 45
Keypad faults........................................................................................................... 47