Nokia 6610i Service Manual

Nokia

CCS Technical Documentation

7-System Module and User Interface

Company confidential

RM-37

Issue 1 04/2004

©Nokia Corporation.

Page 3

ACI ..........................................................................................................................34
External Accessory Regulator .................................................................................35

External Audio ...........................................................................................................35

External Microphone Connection ...........................................................................35
External Earphone Connections ..............................................................................36

Internal Audio ............................................................................................................37

IHF Speaker & Stereo Audio Amplifier  .................................................................37
Internal Microphone  ................................................................................................37
Internal Speaker .......................................................................................................37
IHF Speaker & Stereo Audio Amplifier  .................................................................38
Camera ....................................................................................................................39
Signal descriptions  ..................................................................................................39

Memory Block ...........................................................................................................40

Security ....................................................................................................................40

Clock Distribution .....................................................................................................41

Audio Control ..........................................................................................................42
Accessory identification and Power Supply ............................................................42
Backup Battery ........................................................................................................43

RF Module Introduction ...............................................................................................43

RF Frequency Plan ....................................................................................................45
DC characteristics ......................................................................................................46

Regulators ................................................................................................................46
Typical current consumption ...................................................................................47
Power Distribution ..................................................................................................48

RF characteristics .........................................................................................................49

Channel Numbers and Frequencies .........................................................................49
Main RF characteristics ...........................................................................................49
Transmitter characteristics  ......................................................................................49
Receiver characteristics ...........................................................................................50
RF Block Diagram  ..................................................................................................50
RF Block Diagram RM-37  ......................................................................................51

Frequency Synthesizers .............................................................................................52
Receiver .....................................................................................................................52
Transmitter .................................................................................................................52

Front End .................................................................................................................52
Power Amplifier  ......................................................................................................53
RF ASIC Helga  .......................................................................................................54
AFC function ...........................................................................................................54
Antenna  ..................................................................................................................54

User Interface Modules ................................................................................................55

UI Board TK8 ............................................................................................................55

Keyboard .................................................................................................................55
Display ....................................................................................................................56
LCD & Keypad Illumination ...................................................................................57
Internal Speaker .......................................................................................................57
Buzzer ......................................................................................................................57
Vibra ........................................................................................................................57