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Introduction
Important:
This document is intended for use by authorized service centers only.
"Service Schematics" was created with focus on customer care.
The purpose of this document is to provide further technical repair information for
NOKIA mobile phones on Level 3/4 service activities.
It contains additional information such as e.g. "Component finder".
Saving process time and improving the repair quality is the aim of this document.
It is to be used additionaly to the service manual and other training
or service information such as Service Bulletins.
While every endeavour has been made to ensure the accuracy of this document, some
errors may exist. If the reader finds any errors, NOKIA should be notified in writing.
Please send E-Mail to: TrainingAndVendor.Development@nokia.com
Customer Care / Service Operations / Training and Vendor Devolopment
Company Confidential Copyright © 2007 NOKIA Only for training purposes
Service Schematics
RM-271
RM-276 / RM-289
Version: 1.0 | 01.08.2007 | 6555 / b/c | Board version: 2ab_09a |
Table of contents
Frontpage
BETTY, micro USB, LED drivers
AVILMA, SIM, Audio
RAP3GS, Combo, microSD, microphone
Bluetooth & GPS
User inteface
RF part
Upper part (2ac_07g)
Component finder
Copyright © NOKIA
This material , including documentation and any related computer programs is
protected by copyright, controlled by NOKIA. All rights are reserved. Copying,
including reproducing, modifying, storing, adapting or translating any or all of this
material requires the prior written consent of NOKIA. This material also contains con-
fidential information, which may not be disclosed to others whitout the prior written
consent of NOKIA.
Frontpage
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Table of Contents
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Summarization of Contents

BETTY, micro USB, LED drivers
Power Management and Charging
Details power supply components, charging input, and voltage regulation circuits.
USB Interface and LED Control
Covers USB connectivity and control for display/keypad illumination.
AVILMA, SIM, Audio
AVILMA Chipset Core
Outlines the main AVILMA chipset connections and power supplies.
SIM and Audio Interfaces
Details SIM card reader and audio input/output paths.
RAP3GS, Combo, microSD, microphone
RAP3GS Processor and Memory
Describes the main processor and microSD card slot interface.
Microphone Circuitry
Explains the connection and support for the internal microphone.
Bluetooth & GPS
Bluetooth Module and RF
Covers the Bluetooth module, antenna, and radio frequency interfaces.
GPS Receiver and Control
Details the GPS receiver, antenna, and control signals.
User interface
Display and Keypad Matrix
Outlines connections for the main display, keypad, and camera.
Audio Components
Details audio playback and recording components.
RF part
RF Transceiver and Front-end
Describes the main RF transceiver and front-end components.
Power Amplifiers and Control
Details power amplifier, LNA circuits, and RF control signals.
Upper part (2ac_07g)
Keypad and Connector Flex
Details the flexible connectors for the keypad and other upper parts.
Camera and Audio Modules
Covers camera module and audio playback/recording components.

Table of Contents