Nokia Ringo 2 Appendix 1

PAMS Technical Documentation

Appendix 1

TRANSCEIVER NHN–6NF

Original 11/97

NHN–6NF

PAMS

Appendix 1

Technical Documentation

CONTENTS

Appendix 1 1 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foreword 1 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transceiver NHN–6NF 1 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional Description 1 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modules 1 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exploded View of Transceiver NHN–6NF 1 – 5. . . . . . . . . . . . . .

Assembly Parts of NHN–6NF 1 – 6. . . . . . . . . . . . . . . . . . . . . . .

Quick Guide 1 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 1 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Memory 1 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Original 11/97

PAMS

NHN–6NF

Technical Documentation

Appendix 1

Foreword

This section of the service manual (Appendix) contains specific details for
the NHN–6NF handportable telephone used on the NMT900 network.

The appendix comprises three chapters as follows: Chapter 1, Foreword
(this chapter); Chapter 2, Transceiver NHN–6NF, containing an exploded
view of the NHN–6NF variant (including a list of assembly parts) plus
component parts lists covering the system module and the display
module; and Chapter 3, Quick Guide, which aims to provide all user
information that service personnel are likely to require during servicing
and repair of equipment.

NOTE: The Service Manual is intended for use by qualified

service personnel only.

Appendix 1

Transceiver NHN–6NF

Functional Description

The transceiver electronics consist of UI module PCB and RF/system PCB.
UI module is connected to system module with a connector. System and rf
submodules are interconnected with PCB wiring. Unit can be connected to
accessories with a bottom system connector, which includes charging and
accessory control.

RF block is designed for a hand portable phone, which operates in NMT900
systems. Purpose of the RF module is to receive and demodulate radio fre­quency signal from the base station and to transmit a modulated RF signal
to the base station.

Original 11/97

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