
Second Edition (January 1998)
Publication number: EN/LZB 126 1319 R2A
©
Ericsson Mobile Communications AB, 1998
All Rights Reserved
Printed in Sweden 1998

Preface
The Ericsson service philosophy includes the ambition that engineers serving our
telephones also possess a general knowledge of the system for which they are
intended, as well as of the phone itself and its accessories.
This manual contains consequently not only information regarding the actual service work but also additional information as stated below.
Section 1: System Introduction
- network description
- frequency tables
Section 2: Technical Description
- description of the mechanical design
- operational description of the electronic circuitries
- technical specifications
Section 3: Test/Service Programs
- test equipment
- test program
- ETACS service program
- keypad NAM programming
- flash programming
Section 4: Service Instruc t ions
- system connector signals
- disassembly/reassembly
- PCB exchange
- fault finding and alignment
Section 5: Accessori es
- technical descriptions of available accessories
Section 6: HandsFree Installation
- installation instructions regarding vehicle handsfree kits
Section 7: Spare Parts
- section reserved for separately distributed spare parts lists
Section 8: Service Messages
- section reserved for separately distributed service messages

Contents
1 System Introduction
The Mobile Telephone Network _______________________________ 5
Frequency Tables__________________________________________ 11
2 Technical Description
Overview _________________________________________________ 7
Mechanical Design ________________________________________ 11
Man Machine Interface (MMI) _______________________________ 12
Radio Design_____________________________________________ 13
Power and Charging Design _________________________________ 20
User Interface ____________________________________________ 23
Logic Design _____________________________________________ 24
Audio Design_____________________________________________ 27
Software Design __________________________________________ 33
Technical Specifications ____________________________________ 34
3 Test/Service Programs
Test Equipment ____________________________________________ 5
Test Program ______________________________________________ 7
ETACS Service Programs___________________________________ 17
Keypad NAM Programming _________________________________ 33
Flash Programming ________________________________________ 43
4 Service Instructions
System Connector Signals____________________________________ 5
Disassembly_______________________________________________ 6
Reassembly _______________________________________________ 7
Exchanging the Circuit Board_________________________________ 9
Fault Finding and Alignment ________________________________ 10
5 Accessories
Rapid Charger _____________________________________________ 7
Travel Charger_____________________________________________ 9
Vehicle Power/Charger _____________________________________ 13
DeskTop Charger MC7000 __________________________________ 17
Portable HandsFree ________________________________________ 25
Vehicle HandsFree Solution HF7300 __________________________ 27
Vehicle HandsFree Solution HF7600 __________________________ 35
6 HandsFree Installation
Vehicle HandsFree Solutions HF7300 & HF7600 _________________ 5
7 Spare Parts
8 Service Messages