User Guide

Nokia Customer Care System Module
Company Confidential RH-30/RH-31
Issue 2 11/2004 © 2004 Nokia Corporation. Page 3
IHF Speaker & Stereo Audio Amplifier ......................................................................................34
Internal Microphone .......................................................................................................................34
Internal Speaker ...............................................................................................................................34
IHF Speaker & Stereo Audio Amplifier ......................................................................................35
Memory Block ......................................................................................................................................36
Security ...............................................................................................................................................36
Clock distribution ...............................................................................................................................36
Audio Control ....................................................................................................................................37
Accessory identification and Power Supply .............................................................................37
Backup Battery .................................................................................................................................38
RF Module Introduction ......................................................................................................................39
RF Frequency Plan ..............................................................................................................................40
DC characteristics ..............................................................................................................................41
Regulators ..........................................................................................................................................41
Typical current consumption ........................................................................................................42
Power Distribution ..........................................................................................................................43
RF characteristics ..................................................................................................................................44
Channel Numbers and Frequencies ............................................................................................44
Main RF characteristics .................................................................................................................44
Transmitter characteristics ...........................................................................................................46
Receiver characteristics .................................................................................................................46
RF Block Diagram ............................................................................................................................46
RF Block Diagram RH-30/RH-31 .................................................................................................47
Frequency Synthesizers .....................................................................................................................48
Receiver .................................................................................................................................................48
Transmitter ...........................................................................................................................................48
Front End ............................................................................................................................................48
Power Amplifier ...............................................................................................................................49
RF ASIC Helgo ...................................................................................................................................50
AFC function .....................................................................................................................................50
Antenna ......................................................................................................................
.......................50
User interface modules .....................................................................................................................51
UI board 1bj ......................................................................................................................................51
Keyboard ............................................................................................................................................51
LCD .......................................................................................................................................................53
LCD & keypad illumination ...........................................................................................................53
Flashlight.............................................................................................................................................56
Internal earpiece ..............................................................................................................................57
IHF ........................................................................................................................................................57
Internal microphone .......................................................................................................................57
IR module ...........................................................................................................................................57
Vibra ....................................................................................................................................................58
Pop-Port system connector .............................................................................................................59