Kydera CDR300UV User manual

PORTABLE FM TRANSIVER
CDR-300UV
SERVICE MANUAL/维修手册

GENERAL/概述
INTRODUCTION
SCOPE OF THIS MANUAL
familiar with similar types of commercial grade communications
equipment. It contains all required service information for the
equipment and is current as of the publication date.Changes
Bulletins or Manual Revisions. These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information,
applies to all parts: components, kits, or chassis. If the part
component for proper identification.
PERSONAL SAFETY
The following precautions are recommended for personal safety:
•DO NOT transmit until all RF connectors are verified secure
and any open connectors are properly terminated.
•
blasting caps or in an explosive
•This equipment should be serviced by a qualified technician
only.
SERVICE
This radio is designed for easy servicing. Refer to the schematic
diagrams, printed circuit board views, and alignment procedures
contained within.
255
15W
15W
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。
替换零件的订购
当订购替换零件或设备信息时，应注明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：
•在没有认真核实所有射频插头之前或有任何一个打开的插头
没有连接到响应端子上的情况下，均不要发射。
•在电爆管附近或在易燃性气体环境中，必须关掉电源，不要
操作本设备
•本设备只应该由有资格的技术人员来维修。
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、印刷线路图和调整步骤在内的资料供参考。
信道数量
射频输出功率
RF Power Output
Number of channels
This manual is intended for use by experienced technicians
which may occur after publication are covered by either Service
它包括了维修该设备所 需要的全部资料和现行公布
后可能发生变动，如果需要，可以使用《维修
the full part identification number should be included.This
number is not known, include the chassis or kit number of
SHUT OFF and DO NOT operate this equipment near electrical
which it is a part, and a sufficient description of the required
的数据。在出版
通报》或《手册修订本》 进行补充。
255

MODES
USER MODE PC MODE
模式
用户模式 PC模式
MODES
User mode
PC mode
PC mode
Power ON
PROCEDURE
Used for communication between the radio
and a PC
How to enter each mode
MODES
PC MODE
Preface
The CDR-300VU transceivercan be programmed using a personal
The programming software can be used on an IBM
Caution:
When removing or installing the programming cable, first
switch off the radio power.
Additionally, be sure to disable the VOX function, if
it’s enabled, as it can sometimes activate from connection
noise.
Connection procedure
1.
Connect the CDR-300VUto
the personal Computer using the
interface cable.
2. When the POWER is switched ON, you can enter user
mode.
Programming software description
The software allows a user to program aivsoidar CDR-300V U eht
the
•Programming with IBM PC
If data is transferred to the transceiver from a PC with the software,
the destination data (basic radio information) for each set can be
modified.
For normal use.
FUNCTION
用户模式
计算机模式
Used for communication between the radio
and a PC
用于普通操作
功能
模式类型
User mode
Receiver commands from PC
模式类型 操作步骤
用户模式
计算机模式
打开电源开关
从计算机接收命令
software.
PC or compatible. Fig-1 shows the setup of a PC for programming.
programming interface cable.
计算机模式
前言
通过个人电脑，使用编程电缆和编程软件，对对讲机CDR-300VU
进行编程设置。图1表示一台IBM计算机的编程设置过程。
注意
当拔除或者插入编程电缆首先关闭对讲机电源。另外，确保声
控功能已关闭，如果声控被激活，可能有时会开启连接噪音。
连接步骤
1.使用接口电缆将CDR-300VU与个人电脑连接。
2.当电源开关打开，可以进入用户模式。
编程软件说明
该软件允许用户经由编程接口电缆对CDR-300VU进行编程设定。
使用IBM计算机编程
如果从使用软件的IBM计算机将数据发送到手持机，设定的目的
数据（基本通信参数）均可被修改。
computer, A programming interface cable and programming

电路说明
1.接收部分
a) 前级（射频放大器）
从天线输入的接收信号经低通，经过二极
管收发转换电路，在射频放大器 Q3,Q4 被
放大，其中V段线圈 L28,L30,L32,L16,L20
构成选频带通；U段线圈 L15,L17,L21 构成
选频带通，通过开关 A3 选择进入 Q14 混频
b) 混频
来自射频放大器的信号与来自 U5(WX4818)
的第一本振信号在Q14 中混频，并产生
51.550MHZ 的第一中频信号。
c) 中频、静噪、音频
第一中频信号进入芯片 U1(FD6818)
模拟信道：经过开关 U38 输出到功放。
数字信道：FD6818输出到 U1(C7000)进行
信号解码，解压并处理转换成数字信号，
并输出送入音频放大。
CIRCUIT DESCRIPTION
1. RECEIVER
a) Front Amplifier(RF AMP)
The signal coming from the antenna
input via the low-pass, through the diode
transceiver conversion circuit, is
amplified by the RF amplifiers Q3 and
Q4. Among them, the V-section coils
L28, L30, L32, L16, and L20 constitute
the selective band pass; the U-section
coils L15, L17, L21 constitutes a
selective band pass, and selects into Q14
mixing through switch A3
b) Mixing
The signal from the RF amplifier is
mixed with the first local oscillator
signal from U5 (WX4818) in Q14, and
generates a first intermediate frequency
signal of 51.550 MHz.
c) IF (Intermediate Frequency),
Squelch, Audio
The first intermediate frequency signal
enters chip U1 (FD6818)
Analog channel: output to the power
amplifier through switch U38.
Digital channel: FD6818 output to U1
(C7000) for signal decoding;
decompression lamp processing is
converted into digital signal, and the
output is sent to audio for amplification.

2. 发射部分
a) 发射音频
信号有话筒产生
模拟信道：送入到 FD6818 进行调频等处理
后输出。
数字信道：送入基带处理器 C7000 进行采
样、编码、压缩、I/Q调制输出到 FD6818
进行调频等处理后输出
b) CTCSS DCS
CTCSS DCS 亚音频的编码可由微处理器产
生，在 IC内置 VCO 进行调制。
c)VCO 及射频放大器
通过编程控制 FD6818 完成频率的自动控制
FD6818 输出的射频信号在 Q5 被放大后，经
过开关 A1 切换选择 VU
U:信号经过 Q3 放大后，达到末级功率放大
器所需的激励电平。
V: 信号经过 Q7,Q1 放大后，达到末级功率
放大器所需的激励电平
d)末级功率放大器
U段功率放大器采用 MOS FET 末级功率放大
器Q4
V段功率放大器采用 MOS FET 末级功率放大
器Q2
2. Transmitter
a)Transmitter audio
The signal is generated by microphone
Analog channel: sent to FD6818 for
frequency modulation and other
processing, then sent out
Digital channel: sent into the baseband
processor C7000 for sampling, encoding,
compressing, I/Q modulation and then
output to FD6818 for frequency
modulation and other processing, finally
send out.
b) CTCSS DCS
CTCSS,DCS encoding can be generated
by the microprocessor and modulated by
the IC’s built-in VCO.
c) VCO and RF amplifier
The automatic frequency control is
completed by programming control
FD6818. After the RF signal output by
FD6818 is amplified in Q5, it is
switched to VU via A1 switch.
U: After the signal is amplified by Q3, it
reaches the excitation level required by
the final power amplifier
V: After the signal is amplified by Q7
and Q1, it reaches the excitation level
required by the final power amplifier
d) Final power amplifier
U: The amplifier adopts MOS FET final
power module Q4.
V: The amplifier is adopted MOS FET
type power module Q3.

e) 天线转换开关和 LPF
U段时：末级功率放大器输出的信号经
过D5 和由 L14.L22,L25,L23,L17 组成
带通滤波器后从天线端子发射出去。
D5,D10 一起构成了收发转换开关。
V段时：末级功率放大器输出的信号经
过D9 和由 L9.L10,L12,L33,L21，L27
组成低通滤波器后从天线端子发射出
去。D9,D2一起构成了收发转换开关
3.自动功率控制电路
自动功率控制电路，通过检测末级放大
器场效应管的漏极电流来稳定发射输
出功率。电压比较电路 U1 用微处理器
设定的参考电压来比较末级电流所获
得的电压。自动功率控制电压与 U1 输
出的自动检测减压和参考电压之前的
差值成正比。此输出电压控制场效应管
功率放大器，保持发射部输出功率常数。
发射部输出功率可以通过微处理器进
行改变，在微处理器中改变参考电压来
控制输出功率。
4.电源
电源通过 Q24,Q25 组成的开关电路后再
经过稳压 IC 得到 8V，各个电路所需要
的5V,3.6V,3.3V 电源
e)ANT switch and LPF
U: The signal output by final power amplifier
passes through diodes D5 and is composed of
L14, L22, L25, L23 and L17 to form a band
pass filter and then is transmitted from
antenna terminal. D5 and D10 are consist of
TR switch
V: The signal output by final power amplifier
passes through diodes D9 and is composed of
L9, L10, L12, L33, L21 and L27 to form a
low-pass filter and then is transmitted from
antenna terminal. D9 and D2 are consist of
TR switch
3. Automatic power control circuit
The automatic power control circuit
stabilizes the transmitted output power by
detecting the drain current of the final
amplifier FET. The voltage comparison
circuit U1 uses the reference voltage set by
the microprocessor to compare the voltage
obtained by the final stage current. The
automatic power control voltage is
proportional to the difference between the U1
output auto-detection decompression and the
reference voltage. This output voltage
controls the field effect tube power amplifier
to maintain the output power constant of the
transmitter. The output power of the
transmitter can be changed by a
microprocessor, and the reference voltage is
changed in the microprocessor to control the
output power.
4. Power Supply
The power supply passes through the switch
circuit composed of Q24 and Q25 and then
passes through the voltage regulator IC to
obtain 8V. The 5V, 3.6V and 3.3V power
required by each circuit

5. 控制系统
U1 微处理器以 24MHZ 工作
6. 音频放大器
模拟信号由 FD6818 9 脚输出，数字信
号由 C7000 输出，再由音频功率放大器
U4,(SA58632)放大后驱动扬声器。
7. 接收信令(CTCSS DCS)
从FD6818 第32 脚出来的 CTCSS,DCS 经
过微处理器 U1(C7000)出处理，微处理
器根据内部的各种处理判断接收的亚
音频是否与预先设定的值一致，其判断
结果和噪声、静噪的判断结果一起控制
MUTE及AFCO，由此控制扬声器输出。
8. 锁相环
接收和发射的压控控制振荡器是在
FD6818 内集成的，锁相控制由编程控制。
基准振荡器由外部温补晶体 26M 振荡信
号。通过晶振的可调端来校准 VCO 频率
5. Control system
U1 microprocessor works at 24MHZ.
6. Audio amplifier
The analog signal is output thru pin 9 of
FD6818, and the digital signal is output by
C7000, and then amplified by audio power
amplifier U4 (SA58632) to drive the speaker.
7. Receive signaling (CTCSS DCS)
The CTCSS and DCS coming out from the
32nd pin of FD6818 are processed by the
microprocessor U1 (C7000). The
microprocessor judges whether the received
sub-audio is consistent with the preset value
according to various internal processes. The
judgment result together with judgment
results of noise and squelch to control MUTE
and AFCO, thereby controlling the speaker
output.
8.PLL (Phase locked loop)
The VCO of receiving and transmitting is
integrated in FD6818, and the PLL is
controlled by programming.The reference
oscillator consists of an external temperature
compensation crystal 26M oscillation signal,
and the VCO frequency is calibrated through
the adjustable end of the crystal.

FD6818 芯片的引脚功能
1 AVDD Power supply 电源
2 SCLK Clock input for serial control bus 时钟线
3 SDIO Data input/outputfor serial control bus 数据线
4 AVDD Power supply 电源
5 XTAL1 Oscillator pin1 晶体引脚
6 XTAL2 Oscillator pin2 晶体引脚
7 MODE Control interface select 控制接口的选择
8 SENB Latch enable(active low) inputfor serial control bus置位
9 AF-OUT Audio signal output to speaker 音频输出
10 NC No connection NC
11 MIC_IN MIC input 话筒输入
12 Cc Compensation capacitor connection pin 补偿电容
13 AVDD Power supply 电源
14 NC No connection NC
15 RFIN RF signal input 射频信号输入
16 AVDD Power supply 电源
17 NC No connection NC
18 RFOUT RF signal output 射频信号输出
19 NC No connection NC
20 NC No connection NC
21 AVDD Power supply 电源
22 PABIAS PA bias supply for PA 悬空
23 AVDD Power supply 电源
24 PDN Chip enable, low active 省电功能
25 G7/VOX Gpio7/vox 悬空
26 G6/SQ Gpio7/sq 静噪功能
27 G5/TXON Gpio7/txon 发射电源控制(高电平有效
28 G4/RXON Gpio7/rxon 接收电源控制(高电平有效
29 G3/SDIO Gpio7/sdo 悬空
30 G2/INT Gpio7/int FD6818 中断控制
31 G1/CODE Gpio7/code 悬空
32 G0/CSS Gpio7/css CT/DCSS

PARTS LIST/零件表
CAPAVITORS CC 45 TH 1H 220 J .Caoacitor value
1 2 3 4 5 6 CC45 Colir 010=1pF 2 2 0=22pF
1=Type…ceramic,electrolyitc,etc. 4=Voltage rating 100=10pF
2=Shap…round,square,ect. 5=Value 101=100pF Multiplier
3=Tenp.coefficient 6=Tolerance 102=1000pf=0.001uF 2nd number
103=0.01uF 1st number
.Tenperature coeffictrolytict
1st Word C L P R S T U 2nd Word G H J K L
Color Black Red Orange Yellow Green Blue Violet ppm/℃±30 ±60 ±120 ±250 ±500
ppm/℃0 -80 -150 -220 -330 -470 -750 Example:CC45TH=-470 ±60ppm/℃
.Tolerance (More than 10pF)
Code C D G J K M X Z P No code
(%) ±0.25 ±0.5 ±2 ±5 ±10 ±20 ±40 +80 100 More than 10uF-10~+50
-20 0 Less than 4.7uF-10~+75
Less than 10pF)
Gode B C D F G
(pF) ±0.1 ±0.25 ±0.5 ±1 ±2
.Voltage rating
2nd word A B C D E F G H J K V
1st word
0 1.0 1.25 1.6 2 2.5 3.15 4 5 6.3 8 -
1 10 12.5 16 20 25 31.5 40 50 63 80 35
2 100 125 160 200 250 315 400 500 630 800 -
3 1000 1250 1600 2000 2500 3150 400 5000 6300 8000 -
.Chi
p
ca
p
acitors
(EX) C C 7 3 F S L 1 H 0 0 0 J Dimension(capacitors)
Dimension code L W T
1 2 3 4 5 6 7
1 2 3 4 5 6 7
1=Type Empty 5.6±0.5 5.0±0.5 Less than2.0
2=Shap A4.5±0.5 3.2±0.4 Less than2.0
(Chip)(CH,RH,UJ,SL) 3=Dimension B4.5±0.5 2.0±0.3 Less than2.0
4=Temp.coefficient C4.5±0.5 1.25±0.2 Less than1.25
(EX) C K 7 3 F F 1 H 0 0 0 Z 5=Voltage rating D3.2±0.4 2.5±0.3 Less than1.5
6=Value E3.0±0.2 1.6±0.2 Less than1.25
7=Tolerance F2.0±0.3 1.25±0.2 Less than1.25
(Chip)(B,F) G1.6±0.2 0.8±0.2 Less than2.0
H1.0±0.05 0.5±0.05 0.5±0.05
RESISTORS
.Chip resistor(Carbon) Dimension LT
(EX) R D 7 3 E B 2 B 0 0 0 J
(Chip)(B,F) W
.Carbon resistor(Normal type) Dimension(Chip resistor)
(EX) R D 1 4 B B 2 C 0 0 0 J Dimension code L W T
E3.2±0.2 1.6±0.2 1.0
F2.0±0.3 1.25±0.2 1.0
G1.6±0.2 0.8±0.2 0.5±0.1
1=Type 5=Rating wattage H1.0±0.05 0.5±0.05 0.35±0.05
2=Shap 6=Value
3=Dimension 7=Tolerance Rating wattage
4=Temp.coefficient Code wattage code wattage code wattage
INDUCTANCE 1J 1/16W 2C 1/6W 3A 1W
L D 73 B B 0 0 0 G 2A 1/10W 2E 1/4W 3D 2W
2B 1/89W 2H 1/2W
1 2 3 4 5 6
1=Type 5=Value
2=Shap 6=Tolerance
3=Dimension
4=Temp.coefficient

型号：CDR-300UV
MCU 电子部份
序号
NO.
材料名称 Type
Nam
器件编号
Parts No.
规格描述
用量
位置
备注
应发
数量
Description
Standard
Remark
1
主板
100-DR200MFD-300
C7DR300UV-MCU-FD-51M-2.0
2020.08.21
1
2 Resistor 104-11040RXX-J00 0R 0402 ±5% 35
R474 R473 R92 R90
R89 R7 R26 R158
R138 R137 R131 R126
R125 R119 R118 R117
R15 R721 R23 C255
R472 R471 R91 R10
R297 R170 R167 R162
R159 R155 C185 C184
R99 R153 R116
3
Resistor
104-110410RX-J00
10R
0402
±5%
2
R174 R397
4 Resistor 104-110433RX-J00 33R 0402 ±5% 19
R9 R83 R82 R81 R80
R8 R1 R4 R5 R11 R12
R13 R87 R86 R85 R84
R2 R3 R14
5
Resistor
104-1104100R-J00
100R
0402
±5%
2
R77 R152
6 Resistor 104-1104270R-J00 270R 0402 ±5% 4 R135 R134 R133 R132
7 Resistor 104-11041KXX-J00 1K 0402 ±5% 6 R139 R6 R235 R70
R71 R169
8
Resistor
104-11042KXX-J00
2K
0402
±5%
2
R88 R74
9
Resistor
104-11042K2X-J00
2.2K
0402
±5%
1
R136
10 Resistor 104-11044K7X-J00 4.7K 0402 ±5%
4
R35 R34 R160 R164
11
Resistor
104-11045K6X-J00
5.6K
0402
±5%
1
R168
12 Resistor 104-110410KX-J00 10K 0402 ±5% 15
R190 R112 R110 R109
R108 R106 R104 R102
C35 R72 R234 R237
R73 R157 R107
13
Resistor
104-110412KX-J00
12K
0402
±5%
2
R111 R105
14
Resistor
104-110420KX-J00
20K
0402
±5%
1
R130
15
Resistor
104-110433KX-J00
33K
0402
±5%
2
R145 R143
16
Resistor
104-110447KX-J00
47K
0402
±5%
2
R166 R165
17
Resistor
104-110456KX-J00
56K
0402
±5%
2
R147 R146
18 Resistor 104-1104100K-J00 100K 0402 ±5% 9 R31 R30 R28 R27 R79
R78 R129 R114 C121
19 Resistor 104-1104470K-J00 470K 0402 ±5%
4
R173 R172 R163 R161
20
Capacitor
105-11049PXX-C10
9P/50V
0402
±0.25%
2
C68 C66
21
Capacitor
105-110410PX-J10
10P/50V
0402
±5%
1
C113
22
Capacitor
105-110422PX-J10
22P/50V
0402
±5%
2
C183 C182
23
Capacitor
105-110468PX-J10
68P/50V
0402
±5%
1
C194
24 Capacitor 105-1104100P-J10 100P/50V 0402 ±5% 7 C253 C399 C258 C196
C291 C198 C189
25
Capacitor
105-1104470P-J10
470P/50V
0402
±5%
2
C250 R179
26 Capacitor 105-1104102P-K10 102P/50V 0402 ±10% 6 C37 C115 C106 C354
C200 C188