Nokia 6610 - Cell Phone 625 KB, Руководство по обслуживанию

Страница: 185 / 273

CCS Technical Documentation System Module and User Interface
&RPSDQ\FRQILGHQWLDO
NHL-4/4U
,VVXH

1RNLD&RUSRUDWLRQ 3DJH
External Accessory Regulator ................................................................................. 34
External Audio ...........................................................................................................34
External Microphone Connection ........................................................................... 34
External Earphone Connections .............................................................................. 35
Internal Audio ............................................................................................................36
IHF Speaker & Stereo Audio Amplifier ................................................................. 36
Internal Microphone ................................................................................................ 36
Internal Speaker....................................................................................................... 36
IHF Speaker & Stereo Audio Amplifier ................................................................. 37
Memory Block ...........................................................................................................38
Security.................................................................................................................... 38
Clock distribution ......................................................................................................38
Audio Control.......................................................................................................... 39
Accessory identification and Power Supply............................................................ 39
Backup Battery ........................................................................................................ 40
RF Module Introduction............................................................................................... 41
RF Frequency Plan ....................................................................................................42
DC characteristics ......................................................................................................43
Regulators................................................................................................................ 43
Typical current consumption................................................................................... 44
Power Distribution .................................................................................................. 45
RF characteristics ......................................................................................................... 46
Channel Numbers and Frequencies......................................................................... 46
Main RF characteristics........................................................................................... 46
Transmitter characteristics ...................................................................................... 46
Receiver characteristics........................................................................................... 47
RF Block Diagram .................................................................................................. 47
RF Block Diagram NHL-4 ...................................................................................... 48
Frequency Synthesizers .............................................................................................49
Receiver .....................................................................................................................49
Transmitter .................................................................................................................49
Front End................................................................................................................. 49
Power Amplifier ...................................................................................................... 50
RF ASIC Helga ....................................................................................................... 51
AFC function........................................................................................................... 51
Antenna .................................................................................................................. 51
User Interface Modules ................................................................................................ 52
UI Board TK4 ............................................................................................................52
Keyboard ................................................................................................................. 52
Display .................................................................................................................... 53
LCD & Keypad Illumination................................................................................... 54
Internal Speaker....................................................................................................... 54
Buzzer...................................................................................................................... 54
Internal Microphone ................................................................................................ 54
IR Module ..................................................................................................................55
Vibra ..........................................................................................................................55