Table of Contents
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This is the Electronic Service Manual for the
Cellular Telephone from NEC. It contains specific information on repair and test
procedures.
For details of user functions, general operation and installation, please
refer to the User Guide.
The Service Manual is set out in the following sections.
1.
Precautions for Repair Work:
undertaking safe and efficient repair work.
2.
Unit Specification:
N8
GSM Digital Cellular Telephone.
3.
Introduction of Service Level:
a) Service Level
tools required for this level.
b) Service Level
Service Level 2.
4.
Circuit Description:
diagrams and component purpose descriptions.
5.
Servicing :
servicing the product; and describes the processes of assembly and
disassembly.
6.
Troubleshooting :
using the signal levels and plots at various parts of the circuit.
7.
Device Information :
the semiconductor devices within the HHP.
8.
Circuit Diagrams :
9.
Board Maps :
10.
Parts List :
11.
Glossary :
terms used in this manual.
Introduction
provides the technical specifications for the
1:describes definition of Service Level 1, equipment and
2:describes definition, equipment and tools required for
provides functional details of the circuits, block
defines the jigs, fixtures and test configurations required for
provides an aid to fault finding the product. Includes,
provides functional information and pin-outs of most of
contains all the schematics diagrams.
contains all component layout diagrams.
provides information for the ordering of replacement parts.
NEC Confidential & Proprietary
N8
provides general guidelines for
Tri Band GSM Digital
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Table of Contents
