Kenwood NEXEDGE NX-820 User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
http://www.kenwoodhk.com.hk/
SERVICE MANUAL /
维修手册
© 2012-11 PRINTED IN CHINA
B53-7046-00 (Y)
NX-820
UHF DIGITAL TRANSCEIVER / UHF 数字模拟双模车载对讲机
Panel assy
(A62-1200-03) Badge (B43-1675-04)
Key top
(K29-9479-01)
Modular jack
(E58-0535-05)
C version / C 版本
/模块化插孔 /按键 /面板组件 /徽标

NX-820
2
CONTENTS / 目录
概 述 ............................. 3
系统体系 ............................. 5
模式组合 ............................. 6
安 装 ............................ 11
维修拆卸 ............................ 15
电路说明 ............................ 19
元件说明 ............................ 28
零 件 表 ............................ 32
部件分解图 .......................... 43
故障排除 ............................ 45
调 整 ............................ 51
端子功能 ............................ 90
印刷电路板
显示单元 (X54-3830-10) ............ 98
收发单元 (X57-8240-13) ........... 100
互 连 图 ........................... 104
原 理 图 ........................... 105
方 块 图 ........................... 116
电 平 图 ........................... 119
规 格 .......................... 121
文档版权信息
JVC 建伍株式会社拥有版权 2012。保留所有权利。
未经 JVC 建伍株式会社预先书面同意，无论出于何种目的，
均不得以任何形式或任何方式包括电子、机械、影印、录音
或其他方式复制、翻译、分发或传播本手册的任何部分。
免责声明
JVC 建伍株式会社在准备本文档时已采取所有必要的预防
措施，恕不对错误或疏漏承担任何责任，也不对因使用本文
中所含的信息而导致的损害负责。JVC 建伍株式会社保留出于
改进的需要而随时对文中的产品信息做出更改的权利。
GENERAL....................................................3
SYSTEM SET-UP.........................................5
REALIGNMENT...........................................6
INSTALLATION..........................................11
DISASSEMBLY FOR REPAIR...................15
CIRCUIT DESCRIPTION ...........................19
COMPONENTS DESCRIPTION................28
PARTS LIST...............................................32
EXPLODEDVIEW......................................43
TROUBLE SHOOTING..............................44
ADJUSTMENT...........................................50
TERMINAL FUNCTION .............................90
PC BOARD
DISPLAY UNIT (X54-3830-10)...............98
TX-RX UNIT (X57-8240-13)..................100
INTERCONNECTION DIAGRAM.............104
SCHEMATIC DIAGRAM ..........................105
BLOCK DIAGRAM...................................116
LEVEL DIAGRAM....................................119
SPECIFICATIONS....................................120
Document Copyrights
Copyright 2012 by JVC KENWOOD Corporation. All
rights reserved.
No part of this manual may be reproduced, translated,
distributed, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or other-
wise, for any purpose without the prior written permission of
JVC KENWOOD Corporation.
Disclaimer
While every precaution has been taken in the preparation
of this manual, JVC KENWOOD Corporation assumes no
responsibility for errors or omissions. Neither is any liability
assumed for damages resulting from the use of the informa-
tion contained herein. JVC KENWOOD Corporation reserves
the right to make changes to any products herein at any time
for improvement purposes.

NX-820
3
INTRODUCTION
SCOPE OFTHIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service
information for the equipment and is current as of the pub-
lication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, or chassis. If the
part number is not known, include the chassis or kit number
of which it is a part, and a sufficient description of the re-
quired component for proper identification.
PERSONAL SAFETY
The following precautions are recommended for personal
safety:
• DO NOT transmit if someone is within two feet (0.6 me-
ter) of the antenna.
• DO NOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
• SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.
• All equipment should be properly grounded before pow-
erup for safe operation.
• This equipment should be serviced by only qualified tech-
nicians.
PRE-INSTALLATION CONSIDERATIONS
1. UNPACKING
Unpack the radio from its shipping container and check
for accessory items. If any item is missing, please contact
KENWOOD immediately.
2. PRE-INSTALLATION CHECKOUT
2-1. Introduction
Each radio is adjusted and tested before shipment. How-
ever, it is recommended that receiver and transmitter opera-
tion be checked for proper operation before installation.
2-2.Testing
The radio should be tested complete with all cabling and
accessories as they will be connected in the final installation.
Transmitter frequency, deviation, and power output should be
checked, as should receiver sensitivity, squelch operation,
and audio output. Signalling equipment operation should be
verified.
GENERAL / 概述
引言
本手册的范围
本手册是提供给熟悉通信专业并且具有维修经验的技术人
员使用的。它包括了维修该设备所需要的全部资料和现行出
版日期。在出版后可能发生变动，如果需要，可以参照《维
修通报》或《手册修订本》进行补充。
替换零件的订购
当订购替换零件或设备资料时，应注意完整的零件识别号
码。所有的零件均有识别号码∶元件，组件或机壳。如果不
知道零件的号码，为了正确地识别，必须注明此元件所属的
机壳或组件的号码，并对元件进行充分的说明。
个人安全
为了个人的安全，请注意下列事项∶
• 如果有人在天线两英尺 (0.6 米 ) 范围之内时，不要进行
发射。
• 在没有认真核实所有射频插头之前或有任何一个脱开的插
头没有连接到相应端口上的情况下均不要发射。
• 在电爆管附近或在易燃性气体环境中，必须关闭电源，不
要操作本设备。
• 为了操作的安全，在接通电源之前所有设备应该连接地线。
• 本设备只应该由有资格的技术人员进行维修。
安装前条件
1. 开箱
从运输包装中取出本无线电设备并检查附件。如果有任何
组件遗失，请立即与 KENWOOD 联系。
2. 安装前检查
2-1. 说明
在运输之前每一台无线电设备均已调整和测试过。但是，
在安装之前最好检查接收和发射以便操作正确。
2-2. 测试
无线电设备应该按照电缆和附件最终安装时的连接进行完
整的测试。应该检查发射频率，频偏和输出功率，同样应该
检查接收灵敏度，静噪和音频输出。应该检验信令操作。

NX-820
4
3. PLANNINGTHE INSTALLATION
3-1. General
Inspect the vehicle and determine how and where the ra-
dio antenna and accessories will be mounted.
Plan cable runs for protection against pinching or crush-
ing wiring, and radio installation to prevent overheating.
3-2. Antenna
The favored location for an antenna is in the center of a
large, flat conductive area, usually at the roof center. The
trunk lid is preferred, bond the trunk lid and vehicle chassis
using ground straps to ensure the lid is at chassis ground.
3-3. Radio
The universal mount bracket allows the radio to be
mounted in a variety of ways. Be sure the mounting surface
is adequate to support the radio’s weight. Allow sufficient
space around the radio for air cooling. Position the radio
close enough to the vehicle operator to permit easy access
to the controls when driving.
3-4. DC Power and wiring
1. This radio may be installed in negative ground electrical
systems only. Reverse polarity will cause the cable fuse
to blow. Check the vehicle ground polarity before installa-
tion to prevent wasted time and effort.
2. Connect the positive power lead directly to the vehicle
battery positive terminal. Connecting the Positive lead to
any other positive voltage source in the vehicle is not rec-
ommended.
3. Connect the ground lead directly to the battery negative
terminal.
4. The cable provided with the radio is sufficient to handle
the maximum radio current demand. If the cable must be
extended, be sure the additional wire is sufficient for the
current to be carried and length of the added lead.
4. INSTALLATION PLANNING – CONTROL STATIONS
4-1. Antenna system
The antenna system selection depends on many fac-
tors and is beyond the scope of this manual. Your KEN-
WOOD dealer can help you select an antenna system that
will best serve your particular needs.
4-2. Radio location
Select a convenient location for your control station radio
which is as close as practical to the antenna cable entry
point. Secondly, use your system’s power supply (which sup-
plies the voltage and current required for your system). Make
sure sufficient air can flow around the radio and power sup-
ply to allow adequate cooling.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained in this manual.
3. 安装的步骤
3-1. 概述
检查车辆并确认如何以及在何处安装无线电天线和附件。
安排好电缆的位置，避免挤压或碾碎布线，同时无线电设
备避免过热。
3-2. 天线
天线的最佳位置应该在一个宽阔，平整导电区域的中心，
通常在车顶的中心。行李箱的盖子更好，将地线黏结在行李
箱的盖子和车辆的外壳上确保行李箱盖子接地。
3-3. 无线电设备
通用安装托架允许以多种方法安装无线电设备。确认安装
的表面足以支撑无线电设备的重量。无线电设备的周围留出
适当的空间进行散热。将无线电设备尽可能的安装在靠近车
辆操作者的位置上，以便在驾驶时易于控制。
3-4. 直流电源和布线
1. 本无线电设备只能被安装在负极接地电子系统中。反向极
性将导致电缆保险丝熔断。在安装之前检查车辆的接地极
性，避免工作效率低以及浪费时间。
2. 将电源的正极引线直接连接到车载电池的正极端点上。不
要将正极引线与车辆上的其他正极电压连接。
3. 将接地引线直接与电池的负极连接。
4. 与无线电设备一起提供的电缆适用于所需的最大无线电电
流。如果电缆必须加长，要确认附加的电线适用于所载的
电流和添加引线的长度。
4. 安装步骤 - 基站
4-1. 天线系统
天线系统的选择取决于许多因素和本手册的范围。用户的
KENWOOD 销售商可以帮助用户选择最能满足用户特殊要求的天
线系统。
4-2. 无线电位置
为用户的基站无线电设备选择一个方便的位置，此位置应
尽量靠近天线电缆输入点。其次，使用用户系统的电源 ( 为
用户的系统提供所需的电压和电流 )。确认无线电设备周围的
空气流通顺畅并且足以使电源冷却。
维修服务
为了便于维修本设备，建立了完整的维修服务体系，提供
了包括原理图，印刷电路板图和调整步骤在内的资料供参考。
GENERAL / 概述

NX-820
5
注意
如果不打算使用 3.5mm 扬声器插孔和 15 针 D-sub 连接器，
请装上附带的扬声器插孔盖和 ACC. 盖，防止灰尘和沙粒进入。
Merchandise received /
Choose the type of transceiver
Transceiver programming / See page 7.
A personal computer, programming interface (KPG-46A/46U),
and FPU (programming software) are required for programming.
Frequency range (MHz) RF power
Type
KCT-60
Connection cable
KCT-36
KES-5
External speaker
KCT-18
Ignition sense cable
KES-3
External speaker
(Option)
(Option) *Only when required.
(Option) (Option) (Option)
Delivery /
See page 12. See page 13.
See page 11.
NX-820 C
400~470 25W
Extension cable /
NOTE
If you do not intend to use the speaker 3.5-mm jack and
the D-sub 15-pin connector, fi t the supplied speaker-jack
cap and ACC cap to stop dust and sand from getting in.
GENERAL / 概述
SYSTEM SET-UP / 系统体系
接收到的商品
选择车载对讲机的类型
车载对讲机编程
参见第7页。
需使用个人电脑、编程接口 (KPG-46A/46U) 和 FPU ( 编程软件 ) 进行编程。
频率范围 射频功率 类型
( 可选件 )
( 可选件 )* 仅在需要的时候。
( 可选件 )
( 可选件 )
( 可选件 )
外部扬声器 点火感应电缆 外部扬声器
参见第 12 页。 参见第 13 页。
交货
连接电缆 参见第 11 页。
延长电缆
ACC.
Speaker
jack cap
Power input
connector
Antenna
connector ACC. cap
ACC.
Speaker
jack cap
Power input
connector
Antenna
connector ACC. cap
天线连接器 ACC. 盖
外部扬声
器插孔盖
电源输入连接器

NX-820
6
1. Modes
User mode
PC mode Data programming mode
PC test mode PC tuning mode
Panel test mode Panel tuning mode
Clone mode
Firmware version information
Firmware
programming mode
Mode Function
User mode For normal use.
Panel test mode Use by the dealer to check the fundamental
characteristics.
Panel tuning mode Used by the dealer to tune the transceiver.
PC mode Used for communication between the trans-
ceiver and PC.
Data programming
mode Used to read and write frequency data and other features to and from the transceiver.
PC test mode Used to check the transceiver using the PC.
This feature is included in the FPU.
PC tuning mode Used to tune the transceiver using the PC.
Firmware pro-
gramming mode Used when changing the main program of the flash memory.
Clone mode Used to transfer programming data from one
transceiver to another.
Firmware version
information Used to confirm the internal firmware version.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
Panel test mode [ ] + Power ON
Panel tuning mode Panel test mode + [ ]
PC mode Received commands from PC
Firmware programming mode [ ] + Power ON
Clone mode [ ] + Power ON (One second)
Firmware version information [ ] + Power ON
3. PanelTest Mode
Setting method refer to ADJUSTMENT.
4. PanelTuning Mode
Setting method refer to ADJUSTMENT.
REALIGNMENT / 模式组合
1. 模式
模 式 功 能
用户模式 一般使用。
面板测试模式 用于经销商检查基本功能。
面板调谐模式 用于经销商调整车载对讲机指标。
PC 模式 用于车载对讲机与 PC 之间的通信。
数据编程模式 用于阅读和写入频率数据以及其他功能。
PC 测试模式 用于通过 PC 检查车载对讲机。
该功能内置于 FPU 中。
PC 调谐模式 用于通过 PC 调谐车载对讲机。
固件编程模式 当改变闪存中操作主程序时使用。
复制模式 用于将一台车载对讲机的编程数据传送到另
一台。
固件版本信息 用于确认内部固件版本。
2. 如何进入每一种模式
模 式 操 作
用户模式 接通电源
面板测试模式 [ ]+ 接通电源
面板调谐模式 面板测试模式 +[ ]
PC 模式 从 PC 接收指令
固件编程模式 [ ]+ 接通电源
复制模式 [ ]+ 接通电源 (1 秒钟 )
固件版本信息 [ ]+ 接通电源
3. 关于面板测试模式
关于设定方式，参见调整。
4. 关于面板调谐模式
关于设定方式，参见调整。
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NX-820
7
5. PC Mode
5-1. Preface
The transceiver is programmed using a personal com-
puter, a programming interface (KPG-46A/46U) and FPU
(programming software).
The programming software can be used with a PC. Fig-
ure 1 shows the setup of a PC for programming.
5-2. Connection procedure
1. Connect the transceiver to the computer using the inter-
face cable.
Note:
• You must install the KPG-46U driver in the computer to
use the USB programming interface cable (KPG-46U).
2. When the Power is switched on, user mode can be en-
tered immediately. When the PC sends a command, the
transceiver enters PC mode, and “PROGRAM” is dis-
played on the LCD.
When data is transmitting from the transceiver, the red
LED blinks.
When data is receiving by the transceiver, the green LED
blinks.
Note:
The data stored in the computer must match the “Model
Name” when it is written into the flash memory.
5-3. KPG-46A description
(PC programming interface cable: Option)
The KPG-46A is required to interface the transceiver to
the computer.It has a circuit in its D-sub connector case that
converts the RS-232C logic level to the TTL level.
The KPG-46A connects the 8-pin microphone connector
of the transceiver to the RS-232C serial port of the comput-
er.
5-4. KPG-46U description
(USB programming interface cable: Option)
The KPG-46U is a cable which connects to a USB port
on a computer.
When using the KPG-46U, install the supplied CD-ROM
(with driver software) in the computer. The KPG-46U driver
runs under Windows XP, Vista or 7.
The latest version of the USB driver is available for down-
load from the following URL:
http://www.kenwood.com/usb-com/
(This URL may change without notice.)
5-5. Programming Software : KPG-141D(C)
(ver.3.00 or later) description
The FPU is the programming software for the transceiver
supplied on a CD-ROM. This software runs under Windows
XP, Vista or 7 on a PC.
The data can be input to or read from the transceiver and
edited on the screen.The programmed or edited data can be
printed out. It is also possible to tune the transceiver.
5. PC 模式
5-1. 前言
车载对讲机采用个人电脑、编程接口 (KPG-46A/46U) 和
FPU ( 编程软件 ) 进行编程。
编程软件可在 PC 上使用。图 1 说明了 PC 进行编程的设置。
5-2. 连接操作
1. 用接口电缆将车载对讲机连接到电脑。
注意 ：
· 必须在电脑上安装 KPG-46U 驱动程序才能使用 USB 编程接
口电缆 (KPG-46U)。
2. 电源打开时，可以立即进入用户模式。PC 发出命令时，车
载对讲机进入 PC 模式，LCD 上显示“PROGRAM”。
车载对讲机发送数据时，红色 LED 闪烁。
车载对讲机接收数据时，绿色 LED 闪烁。
注意 ：
电脑保存的数据写入闪存时，必须与“型号名称”相符。
5-3. KPG-46A 说明 (PC 编程接口电缆 : 选购件 )
将车载对讲机连接到电脑需要 KPG-46A。该电缆的 D-sub
连接器盒具有将 RS-232C 逻辑电平转换为 TTL 电平的电路。
KPG-46A 将车载对讲机的 8 针麦克风连接器连接到电脑的
RS-232C 串行端口。
5-4. KPG-46U 说明 (USB 编程接口电缆 : 选购件 )
KPG-46U 是连接到电脑 USB 端口的电缆。
使用 KPG-46U 时，请在电脑上安装附带的 CD-ROM ( 带有
驱动程序 )。KPG-46U 驱动程序可以在 Windows XP、Vista 或
7 下运行。
最新版的 USB 驱动程序可以从下列的 URL 下载。
http://www.kenwood.com/usb-com/
（URL 会有没有预告发生变更的情况。）
5-5. 编程软件 : KPG-141D(C) (ver.3.00 或更高版本 )
说明
FPU 是 CD-ROM 附带的用于车载对讲机的编程软件。该软件
在 PC 的 Windows XP, Vista 或 7 下运行。
可在车载对讲机上写入或读取数据，并可在电脑屏幕上进
行编辑。可以打印编程或编辑的数据。此外，还可调谐车载
对讲机。
REALIGNMENT / 模式组合

NX-820
8
6. Firmware Programming Mode
6-1. Preface
Flash memory is mounted on the transceiver. This al-
lows the transceiver to be upgraded when new features are
released in the future. (For details on how to obtain the firm-
ware, contact Customer Service.)
6-2. Connection procedure
Connect the transceiver to the personal computer using
the interface cable (KPG-46A/46U). (Connection is the same
as in the PC Mode.)
6-3. Programming
1.Start up the firmware programming software (Fpro.exe (ver.
6.1 or later)). The Fpro.exe exists in the KPG-141D(C)
installed folder.
2. Set the communications speed (normally, 115200 bps)
and communications port in the configuration item.
3. Set the firmware to be updated by File name item.
4. Press and hold the [ ] key while turning the transceiver
power ON. Then, the orange LED on the transceiver
lights and “FIRM PRG” is displayed.
5. Check the connection between the transceiver and the
personal computer, and make sure that the transceiver is
in the Program mode.
6. Press “write” button in the window. When the transceiver
starts to receive data, the "LOADING" display lights.
7. If writing ends successfully, the checksum is calculated
and a result is displayed.
8. If you want to continue programming other transceivers,
repeat steps 4 to 7.
6-4. Function
If you press the [ ]key while “FIRM PRG” is displayed,
the checksum is calculated, and a result is displayed.If you
press the [ ]key again while the checksum is displayed,
“FIRM PRG” is redisplayed.
Note:
• This mode cannot be entered if the Firmware Program-
ming mode is set to Disable in the Programming soft-
ware.
• Normally, write in the high-speed mode.
Fig. 1 / 图1
PC
KPG-46A or KPG-46U + Tuning cable (E30-3383-05)
KPG-46U
Transceiver
PC
Transceiver
PC
KPG-46A
D-SUB
(9-pin/ ) USB
FPU
KPG-46A 或 KPG-46U + 调谐电缆 (E30-3383-05)
车载对讲机 车载对讲机
9针
REALIGNMENT / 模式组合
6. 固件编程模式
6-1. 前言
闪存安装在车载对讲机上。将来发布新功能时，可以使车
载对讲机进行升级。 ( 有关如何获得固件的详情，请洽询客
户服务机构。)
6-2. 连接操作
用接口电缆 (KPG-46A/46U) 将车载对讲机连接到个人电
脑。 ( 连接方式与 PC 模式下相同。)
6-3. 编程
1. 启动固件编程软件 (Fpro.exe (ver.6.1 或更高版本 ))。
Fpro.exe 存在于 KPG-141D(C) 安装文件夹内。
2. 在配置项中设置通信速度 ( 通常为 115200 bps) 和通信端
口。
3. 通过文件名项目设置要更新的固件。
4. 打开车载对讲机电源时，按住 [ ] 键。然后，车载对讲
机上的橙色 LED 点亮，并显示“FIRM PRG”。
5. 检查车载对讲机与个人电脑之间的连接，确认车载对讲机
处于编程模式。
6. 按窗口中的“write”按钮。车载对讲机开始接收数据时，
显示“LOADING”。
7. 如果写入操作成功完成，则计算校验和并显示结果。
8. 若要继续为其他车载对讲机编程，请重复步骤4至7。
6-4. 功能
如果在显示“FIRM PRG”时按 [ ] 键，则计算校验和并
显示结果。如果在显示校验和时再次按 [ ] 键，则重新显示
“FIRM PRG”。
注意 :
· 如果车载对讲机的固件编程模式设为禁用，则无法进入此
模式。
· 通常以高速模式写入。

NX-820
9
7. Clone Mode
Programming data can be transferred from one trans-
ceiver to another by connecting them via their modular
microphone jacks. The operation is as follows (the transmit
transceiver is the source and the receive transceiver is a tar-
get). Clone mode should be enabled.
The following data cannot be cloned.
• Tuning data
• Embedded message with password
• Model name data
• ESN (Electronic Serial Number) data
Note:
The following data can be cloned.
• Fleet (own)/ID (own) for FleetSync
• Unit ID (own) for NXDN
• ID (own) for MDC-1200
1. Turn the source transceiver power ON with the [ ] key
held down (1 second), “CLONE MODE” is displayed on
the LCD.
2. Power on the target transceiver.
3. Connect the cloning cable (No. E30-3382-05) to the mod-
ular microphone jacks on the source and target.
4. Press the [ ] key on the source transceiver.
The data of the source is sent to the target. While the
source is sending data, red LED blinked.While the target
is receiving the data, “PROGRAM” is displayed and green
LED blinked. When cloning of data is completed, the
source displays “END”, and the source red LED turned
off, and the target automatically operates in the User
mode.The target can then be operated by the same pro-
gram as the source.
5. The other target can be continuously cloned. Carry out
the operation in step 2 to 4.
REALIGNMENT / 模式组合
7. 复制模式
通过模块化麦克风插孔连接车载对讲机，可以将编程数据
从一台传输到另一台。具体操作如下 ( 发射车载对讲机是主
机，接收车载对讲机是子机 )。 应当启用复制模式。
不能复制以下数据。
· 调谐数据
· 带密码的嵌入信息
· 机型数据
· ESN( 电子序列号 ) 数据
注意 :
可以复制以下数据。
· FleetSync 的 Fleet( 自身 )/ID( 自身 )
· NXDN 的 Unit ID( 自身 )
· MDC-1200 的 ID( 自身 )
1. 按住 [ ] 键 (1 秒 ) 打开主机的电源，LCD 上显示“CLONE
MODE”。
2. 打开子机的电源。
3. 将复制电缆 ( 编号 :E30-3382-05) 连接到主机和子机上的
模块化麦克风插孔。
4. 按主机上的 [ ]键。
主机的数据便被发送到子机。主机发送数据时，红色 LED
将会闪烁。子机接收数据时，将显示“PROGRAM”且绿色
LED 闪烁。数据复制完成后，主机显示“END”，主机的红
色 LED 熄灭，子机自动以用户模式运行。然后子机就可以
按与主机相同的程序操作。
5. 可以继续对另一台子机进行复制。执行步骤 2 至 4 的操作。
Fig. 2 / 图2
Cloning cable
(
E30-3382-05
)
/ 复制电缆
7-1. How to enter the data password
If the read authorization password is set in the optional
feature menu, you must enter the password (Source trans-
ceiver) to activate a clone mode.
You can use 0~9to configure the password. The maxi-
mum length of the password is 6 digits.
7-1. 如何输入数据密码
如果在可选功能菜单中设置了读取授权密码，则您必须输
入密码 ( 主机 ) 方可激活复制模式。
可使用0～9设置密码。密码最大长度为 6 位。

NX-820
10
1. [ ]+ 接通电源。
2. LCD 上显示“CLONE LOCK”。
3. 如果在显示“CLONE LOCK”时按 [ ]和[ ] 键，数字
(0 到 9) 闪烁显示。按 [ ] 键即可确定当前选择的数字。
在此步骤中输入密码后按 [ ] 键，如果输入的密码正确，
则显示“CLONE MODE”。如果密码不正确，则重新显示“CLONE
LOCK”。
7-2. 流程图 ( 主车载对讲机 )
8. 固件版本信息
打开车载对讲机电源时按住 [ ]键，然后一直按住 [ ]键，
LCD 上便出现固件版本信息。
1. [ ] + Power ON.
2. “CLONE LOCK” is displayed on the LCD.
3. If the [ ] and [ ] keys is pressed while “CLONE LOCK” is
displayed, numbers (0 to 9) are displayed flashing. When
you press the [ ] key, the currently selected number is
determined. If you press the [ ] key after entering the
password in this procedure, “CLONE MODE” is displayed
if the entered password is correct. If the password is in-
correct, “CLONE LOCK” is redisplayed.
7-2. Flow chart (Source transceiver)
8. FirmwareVersion Information
Press and hold the [ ] key while turning the transceiver
power ON and then keep pressing and holding the [ ] key,
the firmware version information appears on the LCD.
[ ]
* 读取授权密码 否
是
[] + 打开电源 (1 秒 )
显示 CLONE LOCK
输入密码
复制模式
启动复制功能
否
是
输入的密码
是否正确 ?
是否设置
了密码 *?
Press [ ] key + Power ON for 1 second
Is
password*
set?
* Read
Authorization
password Shows CLONE LOCK
Yes
Yes
[ ]
No
No
Clone mode
Enter password
Start the clone function
Is entered
password
correct?
REALIGNMENT / 模式组合

NX-820
11
1-2.Terminal function
D-sub 15-pin Pin No. Name Molex 15-pin Pin No.
1SB1
2 IGN 2
3 PA or EXT-SP 12
4DO4
5DI5
6 FNC1 9
7 FNC2 11
8 FNC3 7
9FNC4 6
10 FNC5 8
11 FNC6 10
12 5C -
13 HR1 13
14 HR2 14
15 GND 3
1. Connection Cable (KCT-60: Option)
The KCT-60 connection cable kit is used to connect the
transceiver to a Horn alert cable, KCT-18 (Ignition sense
cable), KES-5 (External speaker), or through the KCT-36 ex-
tension cable.
1-1. Installing the KCT-60 (Connection cable) in the
transceiver
1. Remove the ACC. cap on the rear of the transceiver.
2. Connect the D-sub connector of the KCT-60 to the D-sub
15-pin terminal of the transceiver.
3. Connect the 15-pin connector of the KCT-60 to a Horn
alert cable, KCT-18, KES-5, or through a KCT-36 exten-
sion cable.
Note:You must setup using the KPG-141D(C).
INSTALLATION / 安装
1. 连接电缆 (KCT-60: 选购件）
KCT-60 连接电缆组件用于将车载对讲机连接到喇叭提示电
缆、KCT-18 ( 点火感应电缆 )、KES-5 ( 外部扬声器 )，或通
过 KCT-36 延长电缆连接。
1-1. 在车载对讲机上安装 KCT-60 ( 连接电缆 )
1. 拆下车载对讲机后部的 ACC. 盖。
2. 将 KCT-60 的 D-sub 连接器连接到车载对讲机的 D-sub 15
针端子。
3. 将 KCT-60 的 15 针连接器连接到喇叭提示电缆、KCT-18、
KES-5，或通过 KCT-36 延长电缆。
注意 : 必须使用 KPG-141D(C) 进行设置。
1-2. 端子功能
D-sub 15 针针脚号 名称 Molex 15 针针脚号
1SB1
2 IGN 2
3 PA 或 EXT-SP 12
4DO4
5DI5
6 FNC1 9
7 FNC2 11
8 FNC3 7
9 FNC4 6
10 FNC5 8
11 FNC6 10
12 5C -
13 HR1 13
14 HR2 14
15 GND 3
喇叭提示电缆、KCT-18、KES-5 或通过 KCT-36 延长电缆
KCT-60
Horn alert cable, KCT-18, KES-5 or through KCT-36 extension cable

NX-820
12
2. Horn Alert Function
The Horn alert function (max. 2A drive) is enabled by in-
stalling the KCT-60 in the transceiver.
2-1. Installation Procedure
1. Remove the ACC. cap on the rear of the transceiver.
2. Connect the D-sub connector of the KCT-60 to the D-sub
15-pin terminal of the transceiver.
3. Insert the two crimp terminals of the Horn alert cable to
pins 13 and 14 of the square plug.
4. Connect the square plug to the 15-pin connector of the
KCT-60.
5. Connect the remaining two Horn alert cables to your car
Horn alert signal control. The internal FET switch can be
controlled by turning the HA function on/off and by using
a signaling decode output. The maximum current of HA
is 2A. This switch is the FET switch of P-channel type.
Therefore, a DC power supply is necessary to use the
HR1.The voltage range is from 5V to 16V.
Note: You must setup using the KPG-141D(C).
3. Ignition Sense Cable (KCT-18: Option)
The KCT-18 is an optional cable for enabling the ignition
function. The ignition function lets you turn the transceiver
power on and off with the car ignition key.
3-1. Installing the KCT-18 (Ignition sense cable) in
the transceiver
INSTALLATION / 安装
2. 喇叭提示功能
在车载对讲机上安装 KCT-60，可使用喇叭提示功能 ( 最
大2A驱动)。
2-1. 安装步骤
1. 拆下车载对讲机后部的 ACC. 盖。
2. 将 KCT-60 的 D-sub 连接器连接到车载对讲机的 D-sub 15
针端子。
3. 将喇叭提示电缆的两个压接式端子插入方形插头的针脚 13
和 14。
4. 将方形插头连接到 KCT-60 的 15 针连接器。
5. 将剩下的两条喇叭提示电缆连接到汽车的喇叭提示信号控
制。
内部 FET 开关可通过打开 / 关闭 HA 功能和使用信令解码
输出进行控制。HA 的最大电流为 2A。这个开关是 P 通道
类型的 FET 开关。因此，需 DC 电源方可使用 HR1。电压范
围为 5V 至 16V。
注意 : 必须使用 KPG-141D(C) 进行设置。
3. 点火感应电缆 （KCT-18: 选购件）
KCT-18 为用于启用点火功能的选购电缆。点火功能让您能
够通过汽车点火钥匙打开和关闭车载对讲机的电源。
3-1. 在车载对讲机上安装 KCT-18 ( 点火感应电缆 )
13
14
Horn alert cable
Square plug
Crimp terminal
13
14
15
10
11
12
7
8
9
4
5
6
1
2
3
KCT-60
/ 方形插头
/ 压接式端子
/ 喇叭提示电缆
2
Ignition line of the car
Square plug
KCT-18 KCT-60
13
14
15
10
11
12
7
8
9
4
5
6
1
2
3
/ 方形插头
/ 汽车点火线
13. HR1
14. HR2
3. GND

NX-820
13
Square plug
KCT-60
13
14
15
10
11
12
7
8
9
4
5
6
1
2
3
12 3
Black lead
Black/White lead
4. 外部扬声器 ( 选购件）
4-1. KES-5
外部扬声器 KES-5 可安装于 KCT-60。
■ 连接步骤
1. 拆下车载对讲机后部的 ACC. 盖。
2. 将 KCT-60 的 D-sub 连接器连接到车载对讲机的 D-sub 15
针端子。
3. 将 KES-5 的两个压接式端子插入方形插头的针脚3和12。
4. 将方形插头连接到 KCT-60 的 15 针连接器。
注意 :
必须使用 KPG-141D(C) 进行设置。
必须使用 KPG-141D(C) 将某个键指定为“外部扬声器”，
方可使用外部扬声器。
5. 改变串行接口电平
5-1. 将 FNC1 (TXD) 和 FNC2 (RXD) 的 D-SUB 15 针连接
器从 TTL 电平转换到 RS-232C 电平
FNC1 (TXD/6针)和FNC2 (RXD/7针)的D-SUB 15 针连
接器被默认设置在 TTL 电平。但可以通过端口设置将这些串
行端口电平通过 RS-232C 档位转换器 IC (IC516) 转换至 RS-
232C 电平。
从 R664,R635 和 R662 跳线至 R666,R633 和 R665。
5-2. 将 D-SUB 15 针连接器的 FNC1 (TXD),FNC2 (RXD),
FNC3 (RTS) 和 FNC4 (CTS) 从 TTL 电平转换到 RS-
232C 电平
D-SUB 15 针连接器的 FNC1 (TXD/6 针 ),FNC2 (RXD/7 针 ),
FNC3 (RTS/8针)和FNC4 (CTS/9 针 ) 默认设置在 TTL 电平。
但可以通过端口设置将这些串行端口电平通过 RS-232C 档位
转换器 IC (IC516) 转换至 RS-232C 电平。
从 R664,R635,R662,R659,R658 和 R632 跳 线 至 R666,
R633,R665,R663,R660 和 R630。
4. External Speaker (Option)
4-1. KES-5
External speaker KES-5 can be installed for KCT-60.
■Connection procedure
1. Remove the ACC. cap on the rear of the transceiver.
2. Connect the D-sub connector of the KCT-60 to the D-sub
15-pin terminal of the transceiver.
3. Insert the two crimp terminals of the KES-5 to pins 3 and
12 of the square plug.
4. Connect the square plug to the 15-pin connector of the
KCT-60.
Note:
You must set up using the KPG-141D(C).
Before the external speaker can be used, you must as-
sign one of the keys as “External Speaker”, using the
KPG-141D(C).
5. Changing Serial Port Level
5-1. Change FNC1 (TXD) and FNC2 (RXD) of D-SUB
15-pin connector fromTTL level to RS-232C
level
FNC1 (TXD /6pin ) and FNC2 (RXD /7pin ) of D-SUB 15-
pin connector are confi gured at the TTL level as the default
value. But you can change these serial port level to RS-
232C level through the RS-232C level converter IC (IC516)
by configuring the port.
Remove the R664, R635 and R662 chip jumpers and sol-
der the chip jumpers to R666, R633 and R665.
5-2. Change FNC1 (TXD), FNC2 (RXD), FNC3 (RTS)
and FNC4 (CTS) of D-SUB 15-pin connector
fromTTL level to RS-232C level
FNC1 (TXD/6pin), FNC2 (RXD/7pin), FNC3 (RTS/8pin)
and FNC4 (CTS/9pin) of D-SUB 15-pin connector are con-
figured at the TTL level as the default value. But you can
change these serial port level to RS-232C level through the
RS-232C level converter IC (IC516) by configuring the port.
Remove the R664, R635, R662, R659, R658 and R632
chip jumpers and solder the chip jumpers to R666, R633,
R665, R663, R660 and R630.
INSTALLATION / 安装
/ 黑色导线
黑色 / 白色导线
/ 方形插头

NX-820
14
5
615
16 19
20
R664 R635 R658 R632
R797R796
R662
IC703
R659
TX-RX unit
Component side
5
615
16 19
20
R664 R635 R658 R632
R797
R796 R799
R798
R666 R665
R662 R663
R633 R660 R630
+
IC703
R659
■ 5-1 的场合
[TTL 电平 ]
R664,R635 和 R662: 0贴片电阻。
R666,R633 和 R665: 断开。
[RS-232C 电平 ]
R666,R633 和 R665: 0贴片电阻。
R664,R635 和 R662: 断开。
■ 5-2 的场合
[TTL 电平 ]
R664,R635,R662,R659,R658 和 R632: 0贴片电阻。
R666,R633,R665,R663,R660 和 R630: 断开。
[RS-232C 电平 ]
R666,R633,R665,R663,R660 和 R630: 0贴片电阻。
R664,R635,R662,R659,R658 和 R632: 断开。
6. 改变信号类型
6-1. 请将 D-SUB 连接器的信号输出从 DEO 变更到 AFO。
D-SUB 15 针连接器的输出 (4 针 )，作为默认值形成 DEO。
从 R796 跳线至 R798。
6-2. 请将 D-SUB 连接器的信号输入从 DI 变更到 MI2。
D-SUB 15 针连接器的输入 (5 针 )，作为默认值形成 DI。
从 R797 跳线至 R799。
INSTALLATION / 安装
■ In the case of 5-1.
[TTL level]
R664,R635 and R662: 0chip jumper.
R666, R633 and R665: open.
[RS-232C level]
R666, R633 and R665: 0chip jumper.
R664, R635 and R662: open.
■ In the case of 5-2.
[TTL level]
R664, R635, R662, R659, R658 and R632: 0chip
jumper.
R666, R633, R665, R663, R660 and R630: open.
[RS-232C level]
R666, R633, R665, R663, R660 and R630: 0chip
jumper.
R664, R635, R662, R659, R658 and R632: open.
6. Changing of SignalType
6-1.Change signal output of D-SUB connector
from DEO to AFO
The output (4pin) of D-SUB 15-pin connector is config-
ured at the DEO as the default value.
Remove the R796 chip jumper and solder the clip jumper
to R798.
6-2. Change signal input of D-SUB connector from
DI to MI2
The input (5pin) of D-SUB 15-pin connector is configured
at the DI as the default value.
Remove the R797 chip jumper and solder the chip jump-
er to R799.
收发单元
元件面

NX-820
15
1. Disassembly Procedure
1. Remove the cabinet, top packing and shielding plate of
the transceiver.
2. To remove the panel assembly, first turn the transceiver
upside down.
Then, insert a flat-head screwdriver into the holes of the
chassis and tilt it in the direction as shown by the arrow.
DISASSEMBLY FOR REPAIR / 维修拆卸
1. 拆卸步骤
1. 取下车载对讲机的机壳、顶盖和屏蔽板。
2. 要拆卸面板组件，应先将车载对讲机颠倒放置。
然后，将一字螺丝刀插入底座的孔内，使其按箭头所示的
方向倾斜。
Cabinet / 机壳
Panel assembly
Holes/ 孔
面板组件

NX-820
16
3. Disconnect the flat cable from connector of the panel as-
sembly.
4. Hook the finger to hole and while pulling the speaker
holder to this side, expand the panel side of ato c, and
remove the speaker holder from the front panel.
5. When removing the TX-RX PCB, first remove the top
packing.
Then, remove the solder of the antenna hot pin and posi-
tive terminal of the DC cord.
Remove the 16 screws from theTX-RX PCB, power mod-
ule, and audio amp.
3. 从面板组件的连接器断开带状电缆。
4. 拇指放入如图所示的洞孔中，然后同时拉起扬声器座和拉
开面板的①到③处，就可以从面板上卸下扬声器座。
5. 拆卸收发 PCB 时，应先拆下顶盖。
然后，除去天线热端和直流电源线的正极端子的焊锡。
拆下收发 PCB、功率模块和音频放大器上的 16 颗螺丝。
Positive terminal of
the DC cord Antenna hot pin
Power module
Top packing
TX-RX PCB
Audio amp
DISASSEMBLY FOR REPAIR / 维修拆卸
Flat cable
带状电缆
Speaker holder
a
b
c
扬声器座
音频放大器
顶盖
收发 PCB
直流电源线的正极端子
功率模块
天线热端

NX-820
17
Note:
When you supply power to the TX-RX PCB after remov-
ing the TX-RX PCB from the chassis, solder the positive
and ground terminals of the DC cord (Recommendation:
E30-3448-25) to the + and GND terminals of the TX-RX
PCB.
6. Pull it out behind the chassis by rotating the bush cof
the DC cord 90 degrees in the direction of the arrow after
the screw ain the negative terminal is removed, and the
positive terminal bis removed from the chassis.
2. Precautions for Reassembly
1. The tab from ato cis applied the front panel first. And,
dto ftabs inside the front panel is pushed.
DISASSEMBLY FOR REPAIR / 维修拆卸
注意 :
从底座上拆下收发 PCB 之后对收发 PCB 供电时，将直流电
源线 ( 推荐 : E30-3448-25) 的正极和接地端子焊接到收
发PCB的+和GND端子。
6. 拆下负极端子的螺丝①，并从底座上拆下正极端子②之后，
将直流电源线的套管③以箭头方向旋转 90 度，将其拉出
至底座后面。
2. 重新组装注意事项
1. 首先放下①到③的凸起部 , 然后再按住④到⑥的凸起部。
GND
+
TX-RX PCB
Component side / 元件面
/ 收发 PCB
DC cord
a
c
b
直流电源线
Display PCB
Speaker holder
a
b
cd
e
f
扬声器座
显示 PCB

NX-820
18
2. When mounting the panel assembly, pass the flat cable
through the hole of the chassis as shown below then con-
nect the flat cable to connector of the panel assembly.
3. Fit the panel assembly into the two tabs of the chassis
top side first.
Then, fit the panel assembly into the two tabs of the
chassis bottom side by turning the panel assembly.
3. Correspondence when replacing the
LED (D22 and D23)
When replacing the LED (D22 and D23), it makes it to
length.
2. 安装面板组件时，如下图所示将带状电缆穿过底座的孔，
然后将带状电缆连接到面板组件的连接器。
3. 先将面板组件装配到底座顶侧的两个凸起内。然后，再通
过转动面板组件，将面板组件装配到底座底侧的两个凸起
内。
3. 更换 LED (D22 和 D23) 时的相应操作
更换 LED (D22 和 D23) 时，将 LED 的引线截到如下图所的
尺寸。
Panel assembly
Panel
assembly
Chassis Chassis
Hole of
the chassis
DISASSEMBLY FOR REPAIR / 维修拆卸
面板组件
底座 / 底座
底座的孔 面板组件
LED LED
12mm
13mm
D22 D23

NX-820
19
1. Overview
The NX-820 is a UHF Mobile transceiver designed to
operate in the frequency range of 400 to 470MHz. The unit
consists of a receiver, transmitter, phase-locked loop (PLL)
frequency synthesizer, baseband parts, power supply, and
control circuits.
2. Frequency Configuration
The receiver is a double-conversion super-heterodyne
using the first intermediate frequency (IF) of 49.95MHz and
the second IF of 450kHz. Incoming signals from the an-
tenna are mixed with the local signal from the PLL circuit to
produce the fi rst IF of 49.95MHz. This is then mixed with
the 50.4MHz second local oscillator output to produce the
450kHz second IF. The transmit signal frequency is gener-
ated by the PLL VCO, and modulated by the signal from the
DSP. It is then amplified and fed to the antenna.
CIRCUIT DESCRIPTION / 电路说明
3. Receiver System
3-1. RF circuit
An incoming RF signal from the antenna terminal is
passed through the antenna switch (D110, 111 and 107) and
then the bandpass filter (L215, 216 and 210).The bandpass
filter is adjusted by a variable capacitor.The input voltage to
the variable capacitor is regulated by the voltage output from
the D/A converter (IC712). The signal is amplified by an RF
amplifier (Q202), and passed through the bandpass filter
(L207, 208, 209and 211). The resulting signal is applied to
the first mixer (Q201) where it is mixed with the first local
oscillator signal output from the frequency synthesizer to
produce the first IF (49.95MHz).
3-2. IF circuit
The first IF signal is passed through a four-pole mono-
lithic crystal filter (XF1) to reject the adjacent channel signal.
The filtered fi rst IF signal is amplified by the first IF amplifier
(Q305) and then applied to the IF system IC (IC303). The
IF system IC provides a second mixer, AGC amplifier , and
RSSI (Received Signal Strength Indicator).
Fig.1 Frequency configuration / 图 1 频率构成
ANT
SW RF
AMP MIX IF AMP
Baseband Circuit
AF
AMP
MIC
AMP
PLL
VCO
TCXO
PA
AMP TX
AMP
TX/RX: 400~470MHz
ANT
1st MIX MCF
CF
450kHz
49.95MHz
16.8MHz ×3
50.4MHz
SP
MIC
400~470MHz
350.05~
420.05MHz
1. 概述
NX-820 为 UHF 车载对讲机，设计用于 400 至 470MHz 的频
率范围。该设备由接收机、发射机、锁相环 (PLL) 频率合成
器、基带部件、电源和控制电路组成。
2. 频率构成
接收机为二次变频超外差方式，使用的第一中频 (IF) 为
49.95MHz，第二中频为 450kHz。天线接收到的信号与 PLL 电
路的本振信号混频，从而产生第一个 49.95MHz 的中频。然
后与第二个 50.4MHz 的本地振荡器输出信号混频，进而产生
第二个 450kHz 的中频。发射的信号频率由 PLL VCO 生成，
并经 DSP 信号调制。最后，该信号频率经过放大并发送到天线。
3. 接收部系统
3-1. RF 电路
天线端子接收到的 RF 输入信号依次通过天线开关 (D110、
111 和 107) 和带通滤波器 (L215、216 和 210)。带通滤波
器经由可变电容器调整。可变电容器的输入电压经由数模转
换器 (IC712) 的输出电压进行调整。随后，信号被 RF 放大
器 (Q202) 放大，然后通过带通滤波器 (L207、208、209 和
211)。最终的信号被运用到第一混频器 (Q201)。在该混频器
中，信号与频率合成器输出的第一本地振荡器信号混频，从
而产生第一中频 (49.95MHz)。
3-2. 中频电路
第一中频信号经过一个四极单片晶体滤波器 (XF1) 以消除
临近信道的信号。滤波后的第一中频信号经过第一中频放大
器 (Q305) 的放大后，加载到中频系统 IC (IC303) 上。中频
系统 IC 提供一个第二混频器、AGC 放大器和 RSSI ( 接收信号
强度指示器 )。

NX-820
20
CIRCUIT DESCRIPTION / 电路说明
Fig.2 Receiver System / 图 2 接收机系统
LPF
L116, 117
ANT
SW
D110,111
D107
BPF IC303
MIX, AGC
1st PLL
OSC(PLL)
2nd OSC
x3 TCXO
16.8MHz
Q303
X1
CF1
L215,216,
210
BPF
RF AMP
Q202 L209,211
L207,208 Q201
1st MIX XF1 Q305
MCF IF AMP
BPF
CF2
IC507
ASIC
IC502
DSP
IC711
(1/2) IC711
(2/2)
VOL
IC712
SP
IC714
ANT
The second mixer mixes the first IF signal with the
50.4MHz of the second local oscillator output and produces
the second IF signal of 450kHz.
The second IF signal is passed through the ceramic filter
(CF1) to reject the adjacent channel signal.The filtered sec-
ond IF signal is amplified by the AGC amplifier.
The signal from the AGC amplifier is input to the ASIC
(IC507) through the ceramic filter (CF2).
3-3. Audio amplifier circuit
Audio processing (high-pass filter, low-pass filter, de-
emphasized and so on) in FM mode and decoding in NXDN
mode are processed by the DSP (IC502).Audio signals from
the ASIC (IC507), IC502 goes through the amplifier (IC711).
The signal then goes through the D/A converter (IC712) and
an amplifier (IC714).
3-4. Squelch circuit
It amplifies the demodulated noise signal from ASIC
(IC507) after filtering through the LPF and HPF circuit. The
amplified signal is then converted to a DC signal by the de-
tection circuit.The converted signal is fed back to IC507.
Fig. 3 Squelch Circuit / 图 3 静噪电路
IC507
AMP RECT
IC705(1/ 2) Q702 D702
AMP
IC705 (2/2)
ASQAPC
ASQDET
DET ASQ
第二混频器混合第一中频信号及 50.4MHz 的第二本地振荡
器输出，生成 450kHz 的第二中频信号。
第二中频信号通过陶瓷滤波器 (CF1) 以消除临近信道的信
号。滤波后的信号由 AGC 放大器进行放大。
AGC 放大器的信号通过陶瓷滤波器 (CF2) 被输入 ASIC
(IC507)。
3-3. 音频放大器电路
FM 模式的音频处理 ( 高通滤波器、低通滤波器、去加重等 )
和 NXDN 模式的解码由 DSP (IC502) 进行处理。ASIC (IC507)
和 IC502 的音频信号通过放大器 (IC711)。然后信号通过数
模转换器 (IC712) 和放大器 (IC714)。
3-4. 静噪电路
通过 LPF 和 HPF 电路滤波后，该电路放大 ASIC (IC507)
的已解调噪音信号。随后，放大的信号由检测电路转换为 DC
信号。转换的信号被反馈给 IC507。