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PAMS Technical Documentation
[NMP Part No.0275323]
NHN–4NT SERIES
CELLULAR
PHONES
MOBILE PHONES
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Issue 1 06/99
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AMENDMENT RECORD SHEET
Amendment
Number
Date Inserted By Comments
Issue 1 06/99 OJuntune
Original 06/99
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PAMS Technical Documentation
NHN–4NT SERIES CELLULAR PHONES
SERVICE MANUAL
OVERALL CONTENTS
NHN–4NT’Core’ Service Manual comprising:
Chapter 1: Foreword
Chapter 2: General Information
Chapter 3: Baseband Block
Chapter 4: RF Block
Appendix 1: Transceiver NHN–4NF
Non–serviceable Accessories
Service Software Instructions
Disassembly Instructions
Troubleshooting Instructions
Tuning Instructions
Service Accessories
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PAMS Technical Documentation
This document is intended for use by qualified service personnel only.
Company Policy
Our policy is of continuous development; details of all technical modifications will
be included with service bulletins.
While every endeavour has been made to ensure the accuracy of this document,
some errors may exist. If any errors are found by the reader, NOKIA MOBILE
PHONES Ltd should be notified in writing.
Please state:
Title of the Document + Issue Number/Date of publication
Latest Amendment Number (if applicable)
Page(s) and/or Figure(s) in error
IMPORTANT
Please send to: Nokia Mobile Phones Ltd
PAMS Technical Documentation
PO Box 86
24101 SALO
Finland
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PAMS Technical Documentation
Warnings and Cautions
Please refer to the phone’s user guide for instructions relating to operation,
care and maintenance including important safety information. Note also the
following:
Warnings:
1. CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES
FITTED WITH ELECTRONIC ENGINE MANAGEMENT
SYSTEMS AND ANTI–SKID BRAKING SYSTEMS. UNDER
CERTAIN FAULT CONDITIONS, EMITTED RF ENERGY CAN
AFFECT THEIR OPERATION. IF NECESSARY, CONSULT THE
VEHICLE DEALER/MANUFACTURER TO DETERMINE THE
IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RF
ENERGY.
2. THE HANDPORTABLE TELEPHONE MUST NOT BE OPERATED
IN AREAS LIKELY TO CONTAIN POTENTIALLY EXPLOSIVE
ATMOSPHERES EG PETROL STATIONS (SERVICE STATIONS),
BLASTING AREAS ETC.
3. OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT,
Cautions:
1. Servicing and alignment must be undertaken by qualified
2. Ensure all work is carried out at an anti–static workstation and that
3. Ensure solder, wire, or foreign matter does not enter the telephone
4. Use only approved components as specified in the parts list.
5. Ensure all components, modules screws and insulators are
INCLUDING CELLULAR TELEPHONES, MAY INTERFERE WITH
THE FUNCTIONALITY OF INADEQUATELY PROTECTED
MEDICAL DEVICES. CONSULT A PHYSICIAN OR THE
MANUFACTURER OF THE MEDICAL DEVICE IF YOU HAVE
ANY QUESTIONS. OTHER ELECTRONIC EQUIPMENT MAY
ALSO BE SUBJECT TO INTERFERENCE.
personnel only.
an anti–static wrist strap is worn.
as damage may result.
correctly re–fitted after servicing and alignment. Ensure all cables
and wires are repositioned correctly.
6. All PC’s used with NMP Service Software for this produce must be
bios and operating system ”Year 2000 Compliant”
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