Nokia 2650 Service Manual

ISSUE 1 09/2004

COMPANY CONFIDENTIAL

3

Copyright © 2004 Nokia. All Rights Reserved.

RH-53/54

8-System Module

Nokia Customer Care

Technical Summary ...........................................................................................  9
List of Features ................................................................................................  10

No supply  ....................................................................................................... 12
Power off ........................................................................................................ 12
Acting dead  .................................................................................................... 13
Active ............................................................................................................. 13
Sleep mode .................................................................................................... 13
Charging ........................................................................................................ 13

Regulators........................................................................................................  14
DC Characteristics ...........................................................................................  15

Supply Voltage Ranges  ................................................................................. 15
Regulators Voltage Ranges  ........................................................................... 16

Battery connector ........................................................................................... 17
Baseband - RF interface  ................................................................................ 18

Audio .............................................................................................................. 18
Speaker (Ringer & Earpiece)  ......................................................................... 19
Hinge flex connection ..................................................................................... 19

Audio External ................................................................................................ 22
Headset Detection  ......................................................................................... 22
PnPHF Detection  ........................................................................................... 23

Earpiece/Ringer ............................................................................................. 23
Microphone .................................................................................................... 24

Batteries ...........................................................................................................  25
Keyboard..........................................................................................................  26
Display & Keyboard Backlight ..........................................................................  27