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Kenwood NX-800 Service Manual

Kenwood NX-800
161 pages
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SERVICE MANUAL /
维修手册
This product uses Lead Free solder.
无铅焊接通信产品
保护环境建伍领先
注意∶本产品是无铅化焊接产品
在维修时请使用无铅焊锡
和相应的焊接工具
详细事项请访问如下网址了解:
http://www.kenwoodhk.com.hk/
This product complies with the
RoHS
directive for the European market.
© 2009-10 PRINTED IN CHINA
B51-8894-00
(
N
)
NX-800
UHF DIGITAL TRANSCEIVER / UHF
数字模拟双模车载对讲机
C version / C
版本
Metallic cabinet
(A01-2194-11)
Modular jack
(E58-0522-05)
RF coaxial receptacle (M)
(E04-0167-15)
Packing (D-sub outer)
(G53-1626-03)
Packing (Phone jack)
(G53-1616-03)
DC cord (Pig tail)
(E30-7520-25)
Panel assy
(A62-1162-12)
Key top
(K29-9401-03)
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Kenwood NX-800 Specifications

General IconGeneral
BrandKenwood
ModelNX-800
CategoryTransceiver
LanguageEnglish

Summary

GENERAL

Planning the Installation

Steps to plan the installation of the radio and antenna in a vehicle.

Personal Safety

Precautions for personal safety during operation and servicing.

Service

Information on servicing and referring to diagrams and procedures in the manual.

Pre-Installation Considerations

Steps before installing the radio, including unpacking and checks.

REALIGNMENT / Mode Combination

Panel Test Mode

Details on entering and using the panel test mode for diagnostics.

Panel Tuning Mode

Information on entering and using the panel tuning mode for adjustments.

PC Mode

Steps and procedures for connecting the transceiver to a PC for programming.

Firmware Programming Mode

Clone Mode

INSTALLATION / Installation

Ignition Sense Cable (KCT-46: Option)

Installation of the ignition sense cable for power control via car ignition.

Horn Alert/P.A. Relay Unit (KAP-2: Option)

Installation of the Horn Alert/P.A. Relay Unit for expanded audio functions.

Control Head Remote Kit (KRK-10: Option)

Installation of the control head remote kit for remote operation.

Voice Guide & Storage Unit (VGS-1: Option)

Installation of the Voice Guide & Storage Unit for audio prompts and storage.

External Speaker (Option)

Connection procedure for the KES-3 external speaker.

KES-5 or KES-6

Installation and setup for KES-5 or KES-6 external speakers with KAP-2.

GPS Receiver Connection

Installing the GPS receiver unit, including connection and placement.

Installing the GPS receiver together with the VGS-1

Installing the GPS receiver and VGS-1 unit simultaneously.

DISASSEMBLY FOR REPAIR

Precautions on Disassembly

Important precautions to follow before and during the disassembly process.

Precautions on Reassembly

Precautions for reassembling the TX-RX PCB unit after repair.

CIRCUIT DESCRIPTION

Power Supply Circuit

Description of the power supply circuit, including voltage regulation and distribution.

TROUBLE SHOOTING

Checking Power Supply Voltage

Steps to check power supply voltages for various components to diagnose faults.

When an Error Display Appears on the LCD

Troubleshooting error messages displayed on the LCD screen related to ASIC, DSP, or SRAM.

Replacing TX-RX Unit

ADJUSTMENT

Panel Test Mode

Features and operation of the transceiver's test mode.

Panel Tuning Mode

Preparations and procedures for tuning the transceiver using panel controls.

Panel Tuning Mode Flow Chart

Flowchart detailing the panel tuning mode steps and adjustments.

Radio Check Section

Procedures for radio checks including frequency, power, MIC sensitivity, and signaling.

Receiver Section

Adjustment procedures for receiver sensitivity and AF level.

Frequency Adjust

Procedure for adjusting the transceiver's frequency using PC test mode.

High Transmit Power Limit Adjust

Procedure for adjusting the high transmit power limit settings.

Low Transmit Power Limit Adjust

Procedure for adjusting the low transmit power limit settings.

High Transmit Power Adjust

Procedure for adjusting the high transmit power output.

Low Transmit Power Adjust

Procedure for adjusting the low transmit power output.

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