Kirisun PT6700 Service Manual

PT6700 Service Manual

1

Dangerous!

Do not connect the AC power or DC power over 8.6V with
any connector or terminal of the radio. Otherwise it will cause fire,
electric shock or damage to the radio.

Warning!

Do not reverse power connection.

It may cause harm to the radio if signal input on the antenna
connector is higher than 20 dBm (100mW).

Do not turn on the radio before the antenna or load connection
is completed.

If the antenna has been damaged, do not use the radio.
Damaged antenna may cause light burning on skin.

Though the radio is waterproof, it's better to avoid putting it in
rain or snow, or any other liquid to ensure its life and
performance.

Statement!

Kirisun Communications Co., Ltd owns the copyright of
KSP6700 software.

KSP6700 software is free for copying.

Kirisun Communications Co., Ltd owns the copyright of the
MCU software code.

Kirisun Communications Co., Ltd owns the copyright of the
radio outward appearance/structure/circuit design.

Kirisun Communications Co., Ltd owns the copyright of this
service manual. Unauthorized publication is prohibited.

Kirisun Communications Co., Ltd owns the trademarks

“KIRISUN”, “ ”, “ ”, and “科立讯”.

Content

Chapter 1 Overview ..................................................... 2

Chapter 2 External View and Functional Keys ............ 2

Chapter 3 Circuit Description ...................................... 3

Chapter 4 Mode Introduction ....................................... 8

Chapter 5 Disassembly for Repair ............................. 10

Chapter 6 Specifications .............................................. 1

Chapter 7 Troubleshooting ......................................... 17

Appendix 1 Abbreviations ......................................... 17

Appendix 2 Electronic Parts List ............................... 17

Appendix 3 Structural Parts List ................................ 26

Appendix 4 Accessories ............................................. 27

Figure 1 PT6700 Block Diagram 错误！未定义书签。

Figure 2 PT6700 Schematic Circuit Diagram ............ 30

Figure 3 PT6700 Top Layer Position Mark Diagram 38
Figure 4 PT6700 Bottom Layer Position Mark Diagram

................................................................................... 39

Figure 5 PT6700 Top Layer Position Value Diagram 40
Figure 6 PT6700 Bottom Layer Position Value Diagram

................................................................................... 41

PT6700 Service Manual

2

Radio

Model

Component

Position

Mark

Model/

Specifications

Part No.

Qty

PT6700-01

FET

Q203

2SK1824

1TF1-2SK1824

1

Chapter 1 Overview

1.1 Introduction

This manual applies to the service and maintenance of PT6700
series of FM portable radios, and is intended for use by engineers
and professional technicians that have been trained by Kirisun. It
contains all required service information for the equipment.
Kirisun reserves the right to modify the product structure and
specifications without notice in order to improve product
performance and quality. You can also log on our website
www.kirisun.com to download the latest service manual or contact
your local dealer or us.

Please read this manual carefully before repairing the product.

1.2 Service Attentions
* Safety

Do not touch the antenna connector or the PCB while
repairing the radio.

Do not reverse the battery polarity.

It may cause harm to the radio if signal input on the antenna
connector is higher than 20 dBm (100mW).

Do not turn on the radio before the antenna or load connection
is completed.

If the antenna has been damaged, do not use the radio.
Damaged antenna may cause light burning on skin.

* Electromagnetic Interference

It’s prohibited to use or repair the radio in the following

places:

Hospital, health center, airport

Any area with a potentially explosive atmosphere (e.g. orlop
deck of the ship, storage or transportation equipment for fuel and
chemical etc.)

Any place near blasting sites or area with electrical blasting
cap.

It’s recommended to avoid using or repairing the radio in the
following place:

It’s recommended to avoid using radios in a car that is moving
as the radio wave might interfere the auto engine and cause it to
stop working.

* Replacement Parts

All components used for repair should be supplied by Kirisun.

Components of the same type available on the market are not
surely able to be used in this product and we do not guarantee the
quality of the product using such components.

If you want to apply for any component from Kirisun, please
fill in an application form as below.
e.g.
Component Application Form

1.3 Service

All the Kirisun products are subject to the service warranty.

The main unit of the radio is guaranteed for free service of 12
months. Accessories (such as battery pack, antenna, charger and
power adapter etc.) are guaranteed for free service of 6 months.
However, in one of the following cases, charge free service will be
not available.
* No valid warranty card or original invoice.
* Malfunction caused by disassembling, repairing or
reconstructing the radio by the users without permission.
* Wear and tear or any man-made damage such as mechanical
damage, burning or water leaking.
* Product’s serial number has been damaged or the product
trademark is difficult to identify.

After the warranty expires, lifetime service is still available.
We also provide service components to service stations and staffs.

Chapter 2 External View and Functional Keys

2.1 External View

2.2 Functional Keys

① LED Indicator

Lights red while transmitting; lights green while receiving;
flashes red when the radio is in low power.

PT6700 Service Manual

3

RF

AMP

5T

TX/RX SW

5T5R

RF

AMP

5C

BUFFERRXVCO

TXVCO

MODE

RIPPLE

FILTER

5C

BUFFER

PLL IC

DATA FROM MCU

CLK FROM MCU

LE FROM MCU

PS FROM MCU

LOCK TO MCU

TCXO

12.8MHz

QT/DQT FROM MCU

CENTER FREQUENCY ADJUST FROM MCU

5C

5C

MIXER

5R

IF

AMP

5R

5C

12.8MHz TO

51.2MHz

DET COLL

51.65MHz

+/- 15KHz

+/- 7.5KHz

450KHz

NOISE

AMP

TA31136NOISE DETBUSY SIGNEL TO MCU

5R

② On/Off/Volume Control Knob

Turn clockwise until you hear a click to turn on the radio. Turn
counterclockwise until you hear a click to turn it off. Rotate it to
adjust the volume after turning on the radio.
③ Channel Selector Knob
Rotate the knob to select channel 1-16.
④ PTT (Push-To-Talk) Button
Press and hold the PTT button and speak into the microphone,
your voice can be sent to the recipient. Release the PTT button to
receive.

⑤ Side Button 1 (programmable button)
⑥ Side Button 2 (programmable button)
⑦ Top Button (programmable button)
⑧ External Speaker/Microphone Jack Cover

Remove the cover; you will see the external
speaker/microphone jack. External speaker/microphone can be
connected to the radio through this jack.

Chapter 3 Circuit Description

3.1 Frequency Configuration

Figure 3.1 Frequency Configuration

The reference frequency of the frequency synthesizer is
provided by 12.8MHz crystal oscillator X300 TCXO. The receiver
adopts double mixing. The first IF is 51.65MHz and the second IF
is 450kHz. The first local oscillator signal of the receiver is
generated by the frequency synthesizer. The second local
oscillator signal adopts the fourth harmonics (51.2MHz) of the
crystal oscillator X300 (TCXO, 12.8MHz). Transmitter signal is
directly produced by the frequency synthesizer.

3.2 Principle of Receiver (RX)

Figure 3.2 Principle of Receiver

Front end

The signal coming from the antenna passes through the
RX/TX switch circuit (D400, D401, D403 and D404), and passes
through a BPF comprises of C504，C510，L502，L507，C526，
C549，D508，C548，L515，C547，C532，D503，C544 and L513
to remove unwanted out-of-band signal, and is sent to the low
noise amplifier (LNA) consists of Q504 and its peripheral
components to be amplified.
Output signal from the LNA passes through a BPF comprises
of L511，C530，C540，D506，C539，L510，C538，C529，
D505，C537，L509，C536 and D504 and goes to the first mixer
(Q503).
PWM wave is output from pin 12 of the MCU. The wave is
filtered and rectified into adjustable voltage, which can control the
center frequency of the band pass filter through changing capacity
of the varactor diodes (D503, D504, D505, D506, D507, and
D508).

First mixer

The received signal from LNA is mixed with the first local
oscillator signal from the frequency synthesizer to produce the
first IF signal (51.65MHz). Then the first IF signal passes through
crystal filter (Z1) to remove the adjacent channel signal and signal
outside the adjacent channel.

IF circuit

The first IF signal from the crystal filter is amplified by the
first IF amplifier (Q502), and is sent to the IF processing IC
(IC500, TA31136).
IF IC consists of second mixer, second local oscillator, IF
amplifier, limiter, discriminator, and noise amplifier.
The 12.8MHz frequency produced by TCXO (X300) is
multiple-amplified and then the fourth harmonics (51.2MHz) is
adopted as the second local oscillator signal source. The second
local oscillator signal (51. 2MHz) is mixed with the first IF signal
(51.65MHz) in IC500 to generate the second IF (450kHz). And
then the second IF signal is amplified and limited in IC500,
filtered by the ceramic filter (CF500, 450kHz), and demodulated
in IC500 to output audio signal.

PT6700 Service Manual

4

Figure 3.3 IF System

Rx audio signal processing

The voice signal processing circuit of the receiver consists of
IC702 and its peripheral circuits. After being amplified in
IC702-C, voice signal from IC500 is sent to IC4 (CTCSS signal
filtering circuit) and IC702-D respectively. The signal is then
amplified, deemphasized and filtered by other units of IC702 to
remove HF and LF components contained in the audio frequency,
with only voice components within 300~3000Hz left. The
resulting signal is then sent to Q701 for amplification. The
amplified signal is adjusted by the volume potentiometer and then
is sent to the audio power amplifier (U2).

Figure 3.4 Audio Processing of Receiver

Squelch circuit

The demodulated signal from IC500 goes to the selective
noise amplifier consists of internal noise amplifier of IC500, C522,
R521, C522 and R516 to remove the noise component. The
resulting signal is then amplified by Q500 and demodulated by
D501 and is sent to the MCU. MCU identifies level of the noise
and controls the squelch.

Audio power amplifier

The audio power amplifier circuit consists of U2 and its
peripheral components.
The received audio signal, voice alert signal, alert tone signal
and warning tone signal are collected and pass through the audio
amplifier where they are amplified and output to drive the speaker.
The volume of the warning tone is not controlled by the preset

volume level of the radio.
When AFCO is in high level, Q707 turns on, U2 starts to
operate, and the speaker makes sound. Speaker impedance: 16Ω.

CTCSS/DCS signal filtering

Audio signal demodulated by IC500 may contain CTCSS
(Continuous Tone Control Squelch System) or DCS (Digital Code
Squelch) signal. The spectrum components of CTCSS/DCS are
within 2-250Hz. The filtering circuit consists of IC4 can remove
signals outside the CTCSS/DCS spectrum, which enables the
MCU to decode CTCSS/DCS more accurately.

3.3 Principle of Transmitter (TX)
TX power amplification

Figure 3.5 Principle of Power Amplifier and Antenna Switch

The modulated RF signal from VCO is amplified by Q303,
Q304 and Q401, and is sent to Q400 for power amplification.
Grid bias of Q400 and Q401 is controlled by the APC circuit.
Through changing the grid bias voltage, the Tx output power can
be controlled conveniently.

APC (Automatic Power Control)

Figure 3.6 APC Circuit

R422, R423 and R424 are used to test the power amplification
current. IC400A is the sampling amplifier for the power
amplification current. IC400B is the power comparator amplifier.
If the Tx output power is too high, the power amplification
current and IC400A output will increase; IC400B output voltage
will decrease, so the bias voltage of Q400 and Q401 will also
decrease, which causes the Tx output power to be lowered, and
vice versa. Thus the Tx output power can keep stable under
different working conditions.
MCU can set the power through changing the voltage input to
IC400B.

PT6700 Service Manual

5

Tx voice signal processing

Figure 3.7 Transmitter Audio Circuit

The Tx voice signal processing circuit consists of IC600 and
its peripheral components. After being amplified, limited and
filtered, the voice signal from MIC is sent to VCO for modulation
together with CTCSS/DCS signal.
The AGC circuit consists of D600, D601 and Q601. When
signal from MIC is too strong, the AGC circuit will lower the
signal strength to make sure that no distortion happens to the
signal.
Q600 is the power switch of the voice processing circuit. It is
controlled by MCU. Power supply of IC7 will be turned on when
the radio is transmitting.
J2 is the jack for external MIC. When using external MIC, the
internal MIC will be turned off automatically. But the internal
PTT is still effective.

3.4 Principle of Frequency Synthesizer

Figure 3.8 Frequency Synthesizer
The radio adopts PLL type frequency synthesizer.
The frequency synthesizer consists of reference oscillator,
voltage control oscillator (VCO), programmable divider, phase
comparator, and low pass filter.
Rx VCO unit consists of Q302, L308, C331, C335, C332、
D301 and D303. Tx VCO unit consists of Q307, L322, C355,
C363, C371, C364, D306 and D308. D304 is the modulation
circuit of VCO.
IC300 (MB15E03) is PLL integrated circuit, which consists of

programmable reference divider, programmable swallowing
divider, phase comparator, and charge pump.
The low pass filter consists of R329, C358, R330, R331, C359,
R332, C356, C365 and C360.

The reference frequency is provided by X300 (TCXO,

12.8MHz).
The reference frequency from TCXO (Temperature
Compensated Crystal Oscillator) is divided by the programmable
reference divider in IC1 to produce reference frequency of 5kHz
or 6.25kHz (determined by the preset channel frequency and is
controlled by MCU).
The oscillation frequency from VCO goes to IC300 where it is
divided by the programmable swallowing divider and is then
compared with the reference frequency to obtain error signal. The
signal is then filtered by a low pass filter and is sent to VCO to
change the oscillation frequency of the VCO, enabling the
frequency to reach the set value. Then the VCO is locked.
N=F

VCO/FR

N: Times of frequency division
F

: Oscillation frequency of VCO

VCO

FR: Reference frequency

Unlock detection: When PLL is unlocked, Pin 14 of IC will
output low level signal to MCU. Then MCU prohibits the
transmitter from transmitting and makes an alert tone.

Q308: Power filter, which provides more purified power for
PLL to reduce noise of the frequency synthesizer.

3.5 Voice Alert Circuit

The radio is provided with voice alert function, which is
especially useful at night or in dark environment.
IC203 is a voice memory chip, which is stored with voices of
channel indication etc. Once the channel selector knob is switched,
the speaker will announce the current channel number. You can
press the preprogrammed “Voice Alert” key to repeat the current
channel number.
If voice alert function is enabled, the speaker will announce
the current channel number once the “Voice Alert” key is pressed
under standby mode. You can switch the voice type by pressing
and holding the “Voice Alert” key while restarting the radio. Do it
repeatedly to switch the voice type in the order of “Chinese
Male-English Male-Chinese Female-English Female-No Alert”.

3.6 Power Supply

The radio uses 7.4V, 1700mAh Li battery. The Tx power
amplification circuit (Q400 and Q401) and the Rx audio power
amplifier (U2) directly adopt the battery for power supply. Power

PT6700 Service Manual

6

No.

Frequency

[Hz]

No.

Frequency

[Hz]

No.

Frequency

[Hz]

No.

Frequency

[Hz]

1

67.0

11

94.8

21

131.8

31

186.2 2 69.3

12

97.4

22

136.5

32

192.8

3

71.9

13

100.0

23

141.3

33

203.5 4 74.4

14

103.5

24

146.2

34

210.7

5

77.0

15

107.2

25

151.4

35

218.1 6 79.7

16

110.9

26

156.7

36

225.7 7 82.5

17

114.8

27

162.2

37

233.6

8

85.4

18

118.8

28

167.9

38

241.8

9

88.5

19

123.0

29

173.8

39

250.3

10

91.5

20

127.3

30

179.9

EEPROM

D/A

chananl

SW

PTT

MONI

ALARM

PF1
CTCSS/DCS IN

SQL

BATT

VCCN

CTCSS/DCS

BEEP

LE

DATA

CK

to PLL

VIOCE CHIP

TX/RX CONTROL

RXD

TXD

to PC

UL

5TC

5RC

SAVE

APC CONTR

SHIFT
IC200

IC203

MCU

of other circuits is supplied by 5V regulated voltage.
IC100: 5V low dropout, micro-power regulator, which
supplies 5V power with large current for the radio together with
Q104.
Q100: 5T switch, which is controlled by MCU.
5T: Supplies power for front end of Tx.
Q102: 5R switch, which is controlled by MCU.
5R: Supplies power for RF amplifier, mixer, IF processing unit,
and audio signal processing unit etc. of the receiver.
Q103: 5C switch, which is controlled by MCU.
5C: 5V power supply under SAVE control. Supplies power for
frequency synthesizer.

3.7 MCU Unit

Figure 3.9 Principle of MCU Unit
MCU unit controls the operation of each unit of the radio so
that all functions can be realized.
Communicate with external PC.
Access the status data of the radio.
Control the PLL to generate Rx and Tx local oscillator
frequencies.
Obtain status parameters of current channel.
Control status of LED indicator.
Control power supply for each unit.
Check the actions of each functional key.
Generate CTCSS signal.
Generate DCS signal.
Generate power control signal.
Perform CTCSS decoding.
Perform DCS decoding.
Test and control the squelch.
Control content of voice alert.

Memory (E2PROM, AT24C08):

The memory is stored with channel data, CTCSS/DCS data,
other function setting data, and parameter adjusting data.

CTCSS/DCS signal encoding and decoding:

The CTCSS/DCS signal (output from pin 12) generated by
MCU is filtered by R155, R156, C242 and C243. Then the
resulting signal is divided into two parts and sent to VCO and
TCXO respectively for modulation.
The CTCSS/DCS signal from the receiver is sent to MCU (pin

49) for decoding. MCU checks if the CTCSS/DCS signal in the
received signal matches the preset value of the radio, and
determines whether to open the speaker or not.

Power adjustment:

Output from pin 42 of the MCU passes through integrating
filter (R161, C317, R206, and C318), and is sent to the APC unit
to control the output power of the transmitter.

CTCSS

CTCSS (Continuous Tone Control Squelch System) is a
squelch control system which is modulated on carrier and is
guided by a continuous sub-audio signal. If CTCSS is set, the
communication between the transmitting and receiving radios can
be realized only when the two radios have set the same CTCSS
frequency. In doing this, disturbance from other signals can be
avoided.
PT6700 has 39 groups of standard CTCSS frequencies for
your selection. See table 3.1.
The CTCSS signal is generated by MCU, and is passed
through low pass filter consists of RC to remove high frequency
components (above 300Hz). Then the resulting signal is sent to
VCO for modulation.

Table 3.1 CTCSS Frequencies

PT6700 Service Manual

7

023

114

174

315

445

631

025

115

205

331

464

632

026

116

223

343

465

654

031

125

226

346

466

662

032

131

243

351

503

664

043

132

244

364

506

703

047

134

245

365

516

712

051

143

251

371

532

723

054

152

261

411

546

731

065

155

263

412

565

732

071

156

265

413

606

734

072

162

271

423

612

743

073

165

306

431

624

754

074

172

311

432

627

No.

Port

name

Pin

Name

I/O

Function

1

NC

NC 2 AFCO2

P35 O Audio frequency switch 2

3

GLED

P33 O Green LED switch

4

PTT

P34 I [PTT] input

5

MODE I

Connect the 4.7K resistor with VCC, programming test
point 6 VDEVC2

P43 O VHF deviation switch 2

7

VDEVC1

P44 O VHF deviation switch 1

8

RST I

Reset input, programming test point

9

XOUT O

10

VSS I

GND, programming test point

11

XIN I

Oscillator (7.3MHz)

12

VCC I

5V CPU power input, programming test point

13

SHIFT

P27 O Clock beat shift. H: On

14

VCCN

P26

O(PWM)

Frequency stability output

15

TO

P25

O(PWM)

QT/DQT output

16

WNTC

P24

O

Wideband/Narrowband control
H: Wideband, L: Narrowband

17

APC

P23

O(PWM)

TX: Automatic power control output, RX: 0

18

TUNE

P22

O(PWM)

TX: 0 RX: BPF tuning output

19

BEEP

P21

O(PWM)

BEEP/DTMF output

20

SDA

P20

I/O

EEPROM data line

21

ENC0

P17 I Encoder input

22

ENC2

P16 I Encoder input

23

ENC3

P15 I Encoder input

24

ENC1

P14 I Encoder input

25

SCL

P13 O EEPROM clock line

26

NC

NC

27

UL

P45

I

PLL circuit unlock detect pin
H: locked, L: unlocked

28

TXD

P66 O RS-232C output, programming test point

29

RXD

P67 I RS-232C input, programming test point

30

CK

P12 O PLL clock output

31

DT

P11 O PLL data output

32

LE

P10 O PLL IC enable pin, H: locked

33

RX

P31 O Receiving enable

34

BUSY_V

P30 O Busy signal of voice annunciation IC

35

DATA_V

P65 O Data of voice annunciation IC

36

SCLK_V

P64 O Clock of voice annunciation IC

37

RLED

P63 O Red LED control, H: On

38

NC

P07

I(A/D0)

Connect the pull-up resistor with VCC, and connect the
pull-down resistor with VSS

39

NC

NC

40

NC

NC

41

TI

P06

I(A/D1)

QT/DQT signal input

42

BUSY

P05

I(A/D2)

Busy signal input

43

BATT

P04

I(A/D3)

Battery voltage detect

44

VREF I

Connect with VCC

45

SAVE

P60

O

Battery saving control, H: supply power, L: power
saving

46

MUTE

P62 O Mute control H: Mic mute L: audio mute

47

5RC

P61 O Receiving power control L: On

48

KEYIN

P03

I(A/D4)

Programmable key P1, P2, P3 detect

49

5TC

P02 O Transmitting power control, H: On

50

RLED

P01 O Red LED switch

51

AC

P00

O

Alarm switch control, H: controlled by volume switch
Radio should be in low level in emergency alarm

52

AFCO1

P37 I Audio control switch 1

Position

Mark

Model

Function Description

1

IC300

MB15E03

Frequency synthesizer

2

IC701

NJM2904

APC, voltage comparison, driving

DCS

DCS (Digital Code Squelch), which is used to control squelch,
is a series of continuous digital codes modulated on carrier
together with voice signal. If DCS is set, the speaker can be
opened only when the radio receives signal with the same DCS to
avoid disturbance of unwanted signals.
PT6700 has 83 standard codes (inverted and non-inverted) for
your selection. See table 3.2.
DCS signal is produced by MCU (in waveform of PWM). It
passes through the low pass filter consists of RC to remove the
high frequency components (above 300Hz). Then the resulting
signal is sent to VCO and TCXO for modulation, with HF
components of the DCS signal being modulated by VCO, and the
LF components of the DCS signal being modulated by TCXO.
The CTCSS/DCS signal coming from the receiver is sent to
MCU for decoding. MCU checks if the DCS code in the received
signal matches the preset DCS of the radio, and determines
whether to open the speaker or not.

Table 3.2 DCS Codes

3.8 Semiconductor Data

Refer to table 3.3 for descriptions of each pin.

Table 3.3 Definition of CPU Pins

Table 3.4 Function Description of Semiconductor Components

PT6700 Service Manual

8

3

IC500

TA31136

Rx second local oscillation, second IF
amplification, limitation, demodulation, and
noise amplification

4

IC702

NJM2902

Amplification and filtering of demodulation
signal of receiver.

5

IC600

NJM2902

MIC amplification, limitation and filtering

6

U2

TDA2822

Audio frequency power amplification of
receiver

7

IC200

AT24C08

E2PROM, memorizes channel frequency data,
function setting parameters and adjusting status
parameters

8

IC201

R5F212A8

MCU

9

IC202

PST9140NR

MCU reset circuit

10

IC100

HT7150-1

LDO, low-power voltage regulator

11

IC203

W588A080

Voice storage IC

12

Q402

2SC5108

First amplification of transmitter

13

Q403

2SC3356

Second amplification of transmitter

14

Q304

2SC5108

VCO buffer amplifier

15

Q303

2SC5108

VCO buffer amplifier

16

Q308

2SC4617

VCO power supply filter

17

Q500

2SC4738

Noise amplifier

18

Q701

2SC4617

Audio frequency signal amplification of receiver

19

Q400

2SK3476

Transmitter final power amplification

20

Q401

RD01MUS1

Transmitter power amplification driving

21

Q404

DTA144EE

APC output switch

22

Q503

3SK318

First mixer

23

Q504

3SK318

Receiver high power amplifier

24

Q502

KTC4082

1st IF Amplifier

25

Q200

DTC144EE

Red LED Driving

26

Q201

DTC144EE

Green LED Driving

27

Q601

2SK1824

Voice alert switch

28

Q100

KTA1298

5T switch

29

IC102

KTA1298

5R switch

Position Mark

Model

Function Description

D400

MA77

Transmitter antenna switch diode

D401

HVC131

Transmitter antenna switch diode

D402

HSC277

VCO output switch

D403

HVC131

Antenna toggle switch

D301

HVC376B

VCO oscillation varactor diode

D303

HVC376B

VCO oscillation varactor diode

D304

MA360

VCO modulation diode

D405

HZU5ALL

APC output voltage-limiting diode

D309

MA2S111

Unlock detection diode

D310

MA2S111

VCO oscillation varactor diode

D501

1N4148

Noise demodulation

D202

GREEN LED

Receiving indicator

D509

MA2S111

APC single diode

D201

RED LED

Transmitting indicator

D202、D203

GREEN LED

Receiving indicator

Item

Rated Value

Nominal center frequency

51.65MHz

Pass band width

±7.5kHz or higher but within 3dB

40dB stop band width

±20.0kHz or lower

Pulse within band

1.0dB or lower

Insertion loss

3.0dB or lower

Guarantee attenuation

80dB or higher, within f0-910kHz

Terminal impedance

1.2kΩ

Item

Rated Value

Nominal center frequency

450kHz

6dB band width

±6kHz or higher

50dB band width

±12.5kHz or lower

Pulse

2.0dB or lower, within f0±4kHz

Insertion loss

6.0dB or lower

Guarantee attenuation

35.0db or higher, within f0±100kHz

Terminal impedance

2.0kΩ

Mode

Function

How to enter

User Mode

For normal use

Power ON

PC
Mode

Data
Programming
Mode

Used to read and write
frequency data and
other features to and
from the radio

Received commands
from PC.

PC Test Mode

Tune the radio
parameters by PC

Received commands
from PC.

Firmware
Programming
Mode

Upgrade the radio
when new features are
released

Press and hold the top
key for over 2 seconds
while turning the radio
power ON, and received
commands from PC

Wired Clone Mode

Used to transfer
programming data
from one radio to
another

Press and hold side key 1
for over 2 seconds while
turning the radio power
ON

3SK31 8
M: YB-

G1

G2

D

S

G

S

D

CC

C

C

B

B

B

B

E

E

E

E

G

D

S

2SK18 24

Mark: B1

2SC510 8

M: MC

C

B

E

M: R24

2SC335 6

C

B

E

2SC461 7

C

B

E

C

B

E

2SC473 8

KTC4082

C

B

E

2SC162 3

M: L6

KTA12 98

DTC144EE

M:16

GNDINOUT

HT7150 -1

RD01MUS1

D

G

S

S

RD07MVS1

RDA000 2

1

2

3

DA2 21
M: K

2SK30 8N V

DTA14 4EE

C

B

E

FMMT591

GSD

Table 3.7 Features of CF500LTVPC450EB

Table 3.8 Schematic Diagram for Packaging of Semiconductor

Devices

Table 3.5 Function Description of Diodes

Mode Introduction

Chapter 4 Mode Introduction

Table 3.6 Features of Crystal Filter Z1

4.1 User Mode

You can enter User Mode (conventional communication mode)
by turning the radio power ON. Under this mode, users can use
the defined functions of the radio.

4.2 Data Programming Mode

PT6700 Service Manual

9

Computer

(RS232 serial port)

Programming

cable

Radio

(Earphone/Program

ming interface)

The radio has been set before leaving the factory. However,
due to different requirements of users, the radio’s operating
frequencies, channels, CTCSS/DCS, scan, and other functional
parameters should be reprogrammed. Therefore, Kirisun has
specially designed a set of Chinese/English programming software
KSP6700 with friendly interface, convenient operation and
visualized display for setting functional parameters of the radio.

Steps for setting the functional parameters of the radio by PC

are as follows:

A. Install KSP6700 on the computer.
B. Connect the radio to the serial port of the PC with the

special programming cable (KSPL-U08). Refer to the
figure below.

Figure 4.1

C. Turn on the computer.
D. Turn on the radio.
E. Run the KSP6700 programming software by double

clicking on its executive program.

F. Click “Program” in the main menu of KSP6700, and

click “Read” in the pull-down menu to read parameters
of the radio to the computer; click “Write” in the
pull-down menu to write parameters in the computer to
the radio.

G. The following parameters can be set by using KSP6700

according to requirements of the user:

Radio Information:

Radio Model (model/frequency range), Serial Number,

Embedded Information, MCU Version, Hardware Version, etc.

Radio Parameters:

1) Key Assignment: Side Button 1, Side Button 2, Top Button

can be set as long/short key and the hold time can be defined.

2) Optional Functions

1. Wired Clone enable

2. TOT All Low Power Switch

3. TOT Reset Time Firmware Programming Mode enable

4. TOT Pre-alert Beep Tone

5. TOT Rekey Time All Low Power

6. Squelch Level Selection

7. Voice Annunciation Setting Battery Save

8. Password of Read Radio

9. Password of Write Radio

3) Scans
Scan function setting: Priority Channel selection, Revert
Channel selection, Tx Dwell Time, Dropout Delay Time,
Lookback Time.

4) Emergency Setting
Channel Parameter:
(1) CH Rx frequency and Tx frequency (Step value:

2.5kHz/5kHz/6.25kHz)

(2) CH Rx signaling and Tx signaling.
a) None
b) CTCSS (60~260Hz @ 0.1Hz step)
c) DCS(-777 ~ 777 @ octal umber)
(3) Busy channel lockout selection
(4) Clock beat control
(5) Channel spacing 25kHz/12.5kHz (Wide/Narrow) selection
(6) Add/delete scan list
(7) High/low power level selection
(8) QT Reverse
For detailed operation, please refer to “Help” of KPS6700
programming software.
Note:

1. Firstly, please read data of the radio and back up the data before
editing the parameters on KSP6700.

2. If the radio cannot function normally after being written in with
the edited data, please rewrite the backup data into the radio.

3. “Model Information” is important for the radio; users should
not modify it.

4.3 PC Test Mode

Connect the radio to the serial port of the computer with the
special programming cable. Please refer to Figure 4.1.
Warning: Non-professionals should not enter PC Test Mode;
otherwise, the radio may be damaged. Before entering the PC Test
Mode, please firstly connect a 50Ω high frequency load to the
antenna connector of the radio or connect the radio to a general
test set.
In the programming software, enter the Tuning Mode under
the PC Test Mode to tune the following parameters of the radio:

1) Frequency Stability

2) Five frequency points of Tx High Power

3) Five frequency points of Tx Low Power

4) Five frequency points for SQL9 On (Wideband)

5) Five frequency points for SQL9 Off (Wideband)

6) Five frequency points for SQL9 On (Narrowband)

PT6700 Service Manual

10

7) Five frequency points for SQL9 Off (Narrowband)

8) Five frequency points for SQL1 On (Wideband)

9) Five frequency points for SQL1 Off (Wideband)

10) Five frequency points for SQL1 On (Narrowband)

11) Five frequency points for SQL1 Off (Narrowband)

12) Five frequency points for QT (67.0Hz) Deviation
(Wideband)

13) Center frequency point for QT (67.0Hz) Deviation
(Narrowband)

14) Five frequency points for QT (151.4Hz) Deviation
(Wideband)

15) Center frequency point for QT (151.4Hz) Deviation
(Narrowband)

16) Five frequency points for QT (254.1Hz) Deviation
(Wideband)

17) Center frequency point for QT (254.1Hz) Deviation
(Narrowband)

18) Five frequency points for DQT Deviation (Wideband)

19) Center frequency point for DQT Deviation (Narrowband)

20) Five frequency points for Rx Sensitivity

21) Tx Low Voltage

4.4 Firmware Programming Mode

The radio is in possession with an internal Flash ROM which
can be upgraded when new features are released.
Procedure:

1. Press and hold the Top Key for over 2 seconds while turning the
radio power ON. The LED will light orange and the radio enters
the Firmware Programming Mode.

2. Run the firmware programming software KMU on PC.

3. Connect the radio to the computer by the programming cable.

4. Select a COM port and load the firmware upgrading file. Then
click on “E.P” to start downloading.

5. If the communication ends successfully, turn the radio power
OFF to exit.

6. If you want to continue programming other radios, repeat steps
1 to 5.

4.5 Wired Clone Mode

If the wired clone function is enabled, the radio can enter the
Wired Clone Mode. After entering this mode, the radio will not
exit automatically. The user needs to restart the radio if he wants
the radio to return to the User Mode.
The operation procedure is as follows:

1. Press and hold Side Button 1 while turning the radio power ON
to enter the Wired Clone Mode. If the wired clone function is

disabled, the radio will enter User Mode.

2. Connect the slave radio to the master radio by the cloning cable
and turn on the power of the slave radio.

3. Press Side Button 2 of the master radio to start cloning. The
LED on the master radio will light red, and the data of the master
is sent to the slave. While the slave is receiving the data, the LED
lights green. When cloning of data is completed, the LED of the
master will go out, and the slave will restart automatically.

4. Carry out the operation in step 3 to clone other slave radios.
Note: The user can enable or disable the wired clone function
through PC programming software. Once the wired clone function
is disabled, the radio cannot enter the Wired Clone Mode.

Chapter 5 Disassembly for Repair

The radio is a piece of precision communication equipment.
Please be careful when disassemble the radio during service. The
instructions for the disassembly are as follows.

5.1 Attaching and Removing the Battery

1) Attaching the Battery

Fit the two extensions at the top of the battery into the slots at

the top of the radio’s body.

Press the bottom part of the battery towards the radio until a

click is heard and the battery is hooked.

2) Removing the Battery

Push the battery latch at the bottom of the radio forward, the
bottom part of the battery will bounce up automatically. Then
release the belt clip and remove the battery from the radio’s body.
Note:

* Do not short-circuit the battery terminals or dispose battery
in fire.

* Do not disassemble the battery casing by yourself.

5.2 Installing the antenna

PT6700 Service Manual

11

No.

Name

Part number

Pcs

1

7MHR-7069-04A-W0

Main Waterproof Loop

1

2

7SMF-020080M-MH
HT-N1

M2*8 Machine Screws

1

3

Al cabinet assembly

1

4

7MHP-7069-02A-W0

Top Cover

1

5

7MHR-1727-09A-W3

MIC Seal

1

Hold the base of the antenna, and rotate it clockwise to the

connector on the top of the radio until it secures.

5.3 Installing the belt clip

5.4 Removing the mainboard from the Al chassis

1. Remove 11 screws on the PCB by a cross screwdriver;

2. Remove the solder of the antenna connector with a soldering
iron, and remove the mainboard.
See figure below:

Match the two holes of the belt clip with those on the rear of
the radio, and then fix the belt clip to the radio using the two
supplied screws. Loose the fixing screws to remove the belt clip.

5.4 Removing the chassis from the front cabinet

1. Remove the antenna;

2. Pull out the volume knob and the channel selector knob.

3. Remove the two nuts for knobs and the nut for the antenna

connector by the special tool;

4. Remove the two fixing screws at the lower part of the Al

chassis and remove the two fixing screws on two sides of the
cover;

5. Insert a flat-blade screwdriver into the slot at the bottom of

the Al chassis, and prize it up. Then pull the Al chassis
backwards to remove it from the front cabinet. Be careful not
to break the speaker wire.

See figure below:

5.5 Exploded View

PT6700 Service Manual

12

6

7MHR-7210-02A-W0

PT6700 Top Waterproof

Gasket

1

7

Mainboard assembly

1

8

PTT PCB

1

9

7MHS-7069-04A-W

PT7800 PTT key

1

10

7SMF-020040M-SZY
B-N

M2*4 Screws

12

11

7MHP-7210-04A-W0

Volume Knob

1

12

7MHP-7210-03A-W0

Channel Selector Knob

1

13

7MHS-1140-01A-W

Circlip for knob

2

14

7NRC-060100035-B
1

Nut for knob

2

15

7NRC-090115025-G1

Nut

1

16

Front cover assembly

2

17

7MHR-7069-08A-W0

O-type gasket

2

18

7SMF-025080M-SZY
B-Z1

M2.5*8 Screws

2

19

7MHP-7210-02A-W0

MIC cover

1

20

1

No.

Name

Part No.

Pcs

1

7MHP-7210-01A-W0

Front cover

1

2

7MHP-7069-03A-W0

PTT Side cover

1

3

7MHP-7069-04A-W0

PTT cover

1

4

7MHP-7069-06A-W0

Battery latch

1

5

7MHP-7069-10A-WC

Light guide

1

6

7MHR-7069-02A-W0

PTT key

1

7

7MHR-7210-01A-W3

Emergency key

1

8

7GCJ-S1867-01

Paste for earphone PCB
board

1

9

7MHS-1010-02A-N

Spring

2

10

7GCB-3950001

φ 39.5 Speaker net

1

11

4SS7-4564-016-100

φ 45 Speaker

1

12

7MHS-7210-01A-W

Fixed sheet for speaker

1

13

7GCB-070045005-J

3 对讲机 Φ7 话筒布

1

14

7SMF-020040M-SZY
B-N

M2*4 Machine screw

1

15

6PD7-1867-HLC

Earphone PCB board

1

16

6PF7-1867-HLC

7200 耳机连接软板

1

No.

Name

Part number

Pcs

1

7MHL-7069-01A-W

Al bracket

2

3CR7-SMA-50JFB-4

RF co-axis connector

3

7SMF-020040M-SZYB

-N

M2*4 machine screw

4

7MHR-7069-07A-W0

water-proof gasket for
bracket

5

7MHR-7069-05A-W3

Water-proof gasket for
dormer

6

7MHF-7069-02A-W

dormer cover

No.

Name

Specifications

1

Computer

P2 or above, IBM compatible PC, WINDOWS
98/ME/2000/XP Operating System

2

Programming
software

KSP6700

3

Programming
cable

4

Clone cable

KCL01

5

DC regulated
power supply

Output voltage: 13.8V
Output current: ≥ 20A

6

RF power
meter

Measurement range: 0.5-10W
Frequency range: 100MHz-500MHz
Impedance: 50Ω
SWR ≤ 1.2

7

Frequency
counter

Frequency range: 0.1-600MHz
Frequency accuracy: better than ±1×10-6
Sensitivity: better than 100mV

8

Deviation

Frequency range: DC600MHz

Front cover assembly:

Chapter 6 Adjustment

Before test/adjustment, make sure all equipment has been

grounded!

Before test/adjustment, make sure the antenna output
terminal has been correctly connected to corresponding equipment
or load!

The transmitter output terminal must be terminated with an

RF power attenuator and connected to a standard signal generator
(SSG)/frequency counter/deviation meter/spectrum analyzer!

Make sure no transmission operation is being conducted

while measuring the receiver!

During the adjustment/test/maintenance, make sure reliable

anti-static measures are taken for human body and equipment.

6.1 Equipment and Software Required for Test and

Adjustment

Equipment and software listed in Table 6.1 are required for test
and adjustment of PT6700.

Table 6.1 Equipment and Software Required for Test and

Adjustment

Al cover assembly:

PT6700 Service Manual

13

meter

Measurement range: 0 - ±5kHz

9

DMM

Input impedance: above 10MΩ/V DC, capable of
measuring voltage, current and resistance.

10

Audio signal
generator

Frequency range:2-3000Hz
Output level: 1-500mV

11

RF power
attenuator

Attenuation: 40dB or 50dB
Supporting power : higher than 50W

12

Standard signal
generator

Frequency range:10MHz-1000MHz
Output level: 0.1uV-32mV (-127dBm~-17dBm)

13

Oscilloscope

Frequency range: DC~20MHz
Test range: 10mV-20V

14

Audio
frequency
voltmeter

Test range: 10mV-10V

Low Freq Point

Intermediate Freq

Point

High Freq Point

PT6700

420.125MHz

445.125MHz

469.975MHz

Recommendation: Item 6, 7, 8, 10, 11, and 12 listed in the table
can be replaced by HP8920 general test set.

Figure 6.1 External Speaker/Microphone Interface Definition

6.2 Adjustment

After changing components during the maintenance, it is
necessary to test the radio and adjust its technical parameters. The
following part is going to introduce the adjustment items.
Some parameters can be adjusted by use of KSP6700
programming software (in the Tuning Mode). The adjustable
parameters are as follows:

1) 6250Hz Precision

2) 2500Hz Precision

3) Tx Power

4) Tx Low Voltage

5) Squelch Level

6) QT Deviation

7) DCS Deviation

8) Rx Sensitivity

Steps for adjustment:

a. Enter PC Test Mode. Refer to Section 4.2.1.
b. Click “Edit” in the main menu of KSP6700 programming
software, and then click “Entry Tuning” in the pull-down menu to
enter the Tuning Mode.
c. Then the “Tuning Item List” screen will pop up. Double
click the item you want to adjust, and then you can adjust the
parameters.
d. Exit the PC Test Mode after adjustment.

6.3 Adjustment

6.3.1 VCO
Disable the “Battery Save” function, and set the Rx frequency
at the high frequency point (see Table 6.2). Under the receiving
status, measure the voltage of PD by DMM. Then adjust the PD
voltage to be 4.0V±0.2V by tuning the trimming capacitor C371.
Set the Tx frequency at the low frequency point (see Table

6.2), and press the PTT button. Then measure the voltage of PD
by DMM. The resulting voltage should be higher than 0.5V.

Table 6.2 High/Intermediate/Low Frequency Point for PT6700

6.3.2 PLL frequency

1. In the Tuning Mode, double click “6250Hz precision” to
enter. Adjust the parameter among 0-255 to make the Tx
frequency at the rated value (error within ±200Hz).

2. In the Tuning Mode, double click “2500Hz precision” to
enter. Adjust the parameter among 0-255 to make the Tx
frequency at the rated value (error within ±200Hz).

6.3.3 Tx Power
In the Tuning Mode, double click Tx “High power” to enter.
Adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” among 0-255 to make the Tx power at 4W.
Meanwhile, observe the operating current, and make sure that the
current ≤1.8A.
In the Tuning Mode, double click Tx “Low power” to enter.
Adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” among 0-255 to make the Tx power higher
than 0.5W.

6.3.4 Tx Low Voltage
Firstly, adjust the power voltage to be 6.8V. Double click “Tx
low voltage” in the Tuning Mode to enter. The software will test
automatically. When the value changes no more or only changes a
little, click SAVE to exit.

6.3.5 Deviation

Input audio signal (120mV, 1000Hz) to the MIC jack of the

radio. Adjust the potentiometer VR2 to make the Tx deviation at ±

4.2kHz.

6.3.6 DCS Tx Signal Waveform and Deviation

In the Tuning Mode, double click “DCS DEV” to enter. Adjust

PT6700 Service Manual

14

Item

Test Condition

Test Equipment

Measurement Point

Parts to be adjusted

Requirements

Remark

Setting

BATT terminal voltage: 7.5V

DMM

CV

VCO lock voltage
CH: Rx high freq point

C180

4.0V±0.2V

Adjust

CH: Tx high freq point

4.0V±0.2V

Adjust

Item

Test

Condition

Test Equipment

Measurement
Terminal

Adjustment
Parts

Requirement

Remark

Audio level

Test freq: Mid freq
point
Antenna input:
RF OUT: -53dBm
(501μV)
MOD: 1kHz
DEV: ±3.0kHz

RF signal
generator

Oscilloscope

Audio frequency
voltmeter

Speaker
connector

(Turn the volume knob
clockwise to the end)
Audio power ＞ 1.2W

the potentiometer VR1 and observe the demodulation signal (the
waveform should be smooth and similar to square wave). Click
wideband, and adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High”, and “Highest” to make the deviation at

0.75kHz. Then click narrowband, and adjust the value to make the
deviation at 0.35kHz.

6.3.7 CTCSS Deviation
In the Tuning Mode, double click “QT (67.0) DEV” to enter.
Click wideband, and adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High”, and “Highest” to make the deviation at

0.75kHz. Then click narrowband, and adjust the value to make the
deviation at 0.35kHz.
In the Tuning Mode, double click “QT(2541) DEV” to enter.
The tuning method is the same as that of “QT(670) DEV”.

6.3.8 Receiver Sensitivity
In the Tuning Mode, double click “Sensitivity” to enter. Adjust

the five frequency points of “Lowest”, “Low”, “Mid”, “High”,
and “Highest” among 0-255 to make the sensitivity be the highest.

6.3.9 Receiver Squelch
In the Tuning Mode, double click “SQL9 On” to enter. Click

wideband and use the following method to adjust the five
frequency points of “Lowest”, “Low”, “Mid”, “High”, and
“Highest” respectively. Firstly, click one of the frequency points,
and adjust the RF signal frequency of the test equipment to be the
same with the receiving frequency of that frequency point, and
adjust the signal level to be -116dBm. Then adjust the frequency
of the modulation signal to be 1kHz and the deviation to be 3kHz.

6.4 Adjustment Description

See Table 6.3, 6.4, and 6.5.

Table 6.3 VCO

The programming software will adjust the value automatically.
When the value keeps stable, the adjustment of that frequency
point is completed. Then click the next frequency point to do the
adjustment. After all of the five frequency points are adjusted, use
the same method to adjust the five frequency points for
narrowband. The only difference is that the frequency of the
modulation signal should be 1kHz, and the deviation should be

1.5kHz.
In the Tuning Mode, double click “SQL9 Off” to enter. Click
wideband and use the following method to adjust the five
frequency points of “Lowest”, “Low”, “Mid”, “High”, and
“Highest” respectively. Firstly, click one of the frequency points,
and adjust the RF signal frequency of the test equipment to be the
same with the receiving frequency of that frequency point, and
adjust the signal level to be -118dBm. Then adjust the frequency
of the modulation signal to be 1kHz and the deviation to be 3kHz.
The programming software will adjust the value automatically.
When the value keeps stable, the adjustment of that frequency
point is completed. Then click the next frequency point to do the
adjustment. After all of the five frequency points are adjusted, use
the same method to adjust the five frequency points for
narrowband. The only difference is that the frequency of the
modulation signal should be 1kHz, and the deviation should be

1.5kHz.
In the Tuning Mode, double click “SQL1 On” and “SQL1

Off” to enter respectively. Use the same method stated above to do
the adjustment. The only difference is that the RF signal level for

“SQL1 On” should be 123dBm, and the RF signal level for
“SQL1 Off” should be 125dBm.

Table 6.4 Rx Part

PT6700 Service Manual

1

Audio load: 16Ω

Distortion
meter/General test
set

Sensitivity

CH: Mid freq point
CH: Low freq point
CH: High freq point
RF OUT: -119dBm
(0.25μV)
MOD: 1kHz
DEV: ±3.0kHz

PC Tuning
Mode

SINAD: 12dB or higher

SQL On
sensitivity

CH: Rx center freq
point

PC Tuning
Mode

Normal squelch on after
adjustment
Level 9
RF OUT: -116dBm

Level 1
RF OUT: -123dBm

Item

Test condition

Test equipment

Measuring

terminal

Adjustment

parts

Requirement

Remark

Tx frequency

Frequency counter /

General test set

Antenna

PC Tuning

Mode

Within ±200Hz

DCS waveform

(balance)

Oscilloscope /

General test set

VR1

Smooth and similar to

square wave

Power

Power: 7.5V

Power meter/ General

test set

Ammeter

PC Tuning

Mode

Adjust to 4W

Within
±0.2W

Max. modulation

deviation

CH：Tx center

freq point

AG：1kHz/220mV

Deviation meter/

General test set

VR2

Adjust to ±4.2kHz

±200Hz

Modulation

sensitivity

CH：Tx center

freq point

AG：1kHz/22mV

Deviation checked

should be

2.2kHz~3.6kHz

CTCSS DEV

CTCSS：67Hz

Deviation meter/

General test set

PC Tuning

Mode

Adjust to ±0.75kHz

±50Hz

DCS DEV

DCS：023N

Deviation meter/

General test set

PC Tuning

Mode

Adjust to ±0.75kHz

±50Hz

Low battery

warning

Battery terminal:

6.8V

PC Tuning

Mode

Indicator flashes after

adjustment

Product Model

PT6700

Frequency
136 ~ 174 MHz

400 ~ 450MHz

420 ~ 470 MHz

Number of Channels

16

Channel Spacing

W: 25 kHz /N:12.5kHz

Operating Temperature

-25℃~ +55℃

Antenna Impedance

50Ω

Frequency Stability

±2.5ppm

Sensitivity (12dB SINAD)

0.25μV(W) / 0.28μV(N)

Adjacent Channel Selectivity

W: ≥ 70dB / N:≥ 60dB

Intermodulation Interference

≥ 65dB

Audio Output Power

1W (16Ω)

Audio Distortion

≤ 5%

Tx Power

4W(UHF) / 5W(VHF)

Modulation Type

W:16KφF3E / N:11KφF3E

Clutter and Harmonic

≤-36 dBm

Residual FM（300~3000Hz）

W:≤-45 dB / N:≤-40dB

Audio Distortion（300~3000Hz）

≤ 5%

Adjacent Channel Power

W:≥ 70dB / N:≥ 60dB

Max. Deviation

W: <±5kHz / N: <±2.5kHz

Table 6.5 Tx Part

Chapter 7 Specifications

7.1 General Specifications

7.2 Receiver Section

7.3 Transmitter Section

PT6700 Service Manual

17

No.

Problem

Causes and Solutions

1

No display after
switching on
the radio

A. Battery power may be insufficient, please recharge

or change the battery pack.
B. The power switch is broken, please change it.
C. The CPU is broken, please change the IC.
D. The regulator tube IC100 is broken, please change

the IC.

2

PLL
unlocked
(Beeping)

A. The PLL crystal oscillator X300 is broken. Please

change it.
B. The oscillator transistor Q302 and Q307 are

broken. Please change them.
C. The PLL IC300 is broken. Please change it.

3

Cannot talk to
or hear other
group members

A. The frequencies of both users are not the same,

select the same frequency channel.
B. The CTCSS/DCS of both users are not the same.

Please reset it with PC.
C. The radio is out of the effective communication

range.

4

Cannot receive
signals

A. The antenna is in poor contact. Please fasten the

antenna until secure.
B. The sensitivity is too low, please adjust it with PC.
C. The HF amplifier Q504 is broken. Please change

it.
D. The squelch level is too high and the squelch cannot be

opened. Please reset the squelch level with PC.
E. The mixing tube Q503 is broken. Please change it.
F. The FM processing chip IC500 is broken. Please

change it.
G. The crystal filter Z1 is broken, please change it.
H. The ceramic filter CF500 is broken, please change

it.

5

The
transmitting red
light is on, but
no voice is
heard by the
recipient.

A. The amplifier tube Q400 is broken, so there is no

power output, please change it.
B. The microphone is broken, please change it.
C. The operational amplifier IC400 is broken, please

change it.

6

The receiving
green light is
on, but no voice
is heard.

A. The speaker is broken. Please change it.
B. The audio power amplifier U2 is broken. Please

change it.
C. The operational amplifier IC702 is broken, please

change it.

7

Cannot program

A. The cable connection is wrong, please check the

the radio
parameters
normally

cable connection.
B. The computer RS232 serial port output is

abnormal, please check the computer.
C. The external MIC/Speaker jack is in poor contact,

please change the jack.

No.

Part No.

Name

Specifications

Qty

Position mark

1

4SM7-6027-A40B

MIC

MIC_PT567

1

MIC600

2

1DG1-CM1293A

Diode

CM1293A

2

D101,D102

3

1DP1-BV08C

Diode

SOD323

3

D1,D2,D4

4

1DR1-1SR154-400

Diode

1SR154_400

1

D100

Chapter 8 Troubleshooting

Appendix 1 Abbreviations

AMP: Amplify, amplifier
ANT: Antenna
APC: Automatic Power Control
BPF: Band Pass Filter
CTCSS: Continuous Tone Control Squelch System
DCS: Digital Code Squelch
DEMOD: Demodulation
E2PROM: Electrical Erasable Programmable Read Only Memory
HPF: High Pass Filter
IDC: Instantaneous Deviation Control
IF: Intermediate Frequency
LED: Light-Emitting Diode
LNA: Low Noise Amplifier
LPF: Low Pass Filter
MCU: Micro Control Unit
MIC: Microphone
MOD: Modulation
MONI: Monitor
PLL: Phase Lock Loop
PTT: Push-to-talk
RX: Receiver
SPK: Speaker
TCXO: Temperature Compensated Crystal Oscillators
TX: Transmitter
UL: Un-lock
VCO: Voltage Control Oscillator

Appendix 2 Electronic Parts List

PT6700 Service Manual

18

5

1DS1-1SS372

Diode

1SS372

1

D600

6

1DS1-DAN222

Diode

DAN222

1

D601

7

1DS1-HSC277

Diode

HSC277

3

D402,D403,D500

8

1DS1-HVC131

Diode

HVC131

2

D400,D401

9

1DS1-MA2S111

Diode

MA2S111

3

D309,D310,D509

10

1DS1-RB706F-40

Diode

RB706F

1

D501

11

1DV1-1SV278

Diode

1SV278

1

D304

12

1DV1-HVC376B

Diode

HVC376B

15

D300,D301,D302,D303,D305,D306,D607
,D308,D502,D503,D504,D505,D506,D50
7,D508

13

1DZ1-HZU5ALL

Voltage
regulator Diode

HZU5ALL

1

D405

14

1IL1-NJM2902V

Operational
amplifier IC

NJM2902

3

IC600,IC701,IC702

15

1IL1-NJM2904V

Operational
amplifier IC

NJM2904

1

IC400

16

1IM1-AT24C512BN

Memory IC

AT24C08N

1

IC200

17

1IS1-BT588

Voice IC

BT588

1

IC1

18

1IP1-R5F212B8SNFP

CPU IC

R8C_PT4208

1

IC201

19

1IS1-HT7130-1

Voltage
regulator IC

HT7130

1

IC100

20

1IS1-MB15E03SL

PLL IC

MB15E03

1

IC300

21

1IS1-PST9140NR

Reset IC

PST9124NR

1

IC202

22

1IS1-GT3136

IF IC

TA31136

1

IC500

23

1IS1-TA7805AF

Voltage
regulator IC

TA78033AF

1

Q104

24

1IS1-TDA2822

AUDIO AMP
IC

TDA2822

1

U2

25

1IS1-W588A080

Voice IC

W588-PT567

1

IC203

26

1TF1-2SK1824

FET

2SK1824

7

Q203,Q406,Q600,Q604,Q702,Q704,Q710

27

1TF1-2SK508NV-K52

FET

2SK508

2

Q302,Q307

28

1TF1-3SK318

Dual-gate FET

3SK318

2

Q503,Q504

29

1TF1-RD01MUS2

FET

RD01

1

Q401

30

1TF1-RD07MUS2B

FET

RD07

1

Q400

31

1TF1-ST2302

FET

ST2302

4

Q4,Q5,Q700,Q703

32

1TT1-2SC3356-R24

Triode

2SC3356

1

Q403

33

1TT1-2SC4617-R

Triode

2SC4617

4

Q202,Q308,Q500,Q701

34

1TT1-2SC4919

Triode

2SC4919

1

Q601

35

1TT1-2SC5108-Y

Triode

2SC5108

6

Q300,Q301,Q303,Q304,Q402,Q502

36

1TT1-DTA143TE

Triode

DTA143TE

2

Q305,Q306

37

1TT1-DTA144EE

Triode

DTA144EE

3

Q404,Q505,Q705

PT6700 Service Manual

19

38

1TT1-DTC144EE

Triode

DTC144EE

13

Q2,Q3,Q101,Q105,Q106,Q200,Q201,Q40
5,Q501,Q602,Q603,Q706,Q707

39

1TT1-KTA1298-Y

Triode

KTA1298

4

Q1,Q100,Q102,Q103

40

2CA1-TZVY2Z100A110

Capacity

VC-1

2

C335,C371

41

2CC1-10-C0G500-100D

Capacity

C0402

7

C308,C309,C318,C321,C328,C547,C603

42

2CC1-10-C0G500-101J

Capacity

C0402

16

C113,C118,C119,C120,C121,C122,C123,
C124,C125,C126,C127,C128,C375,C422,
C447,C566

43

2CC1-10-C0G500-120J

Capacity

C0402

3

C331,C363,C534

44

2CC1-10-C0G500-150J

Capacity

C0402

3

C327,C536,C544

45

2CC1-10-C0G500-160J

Capacity

C0402

2

C311,C419

46

2CC1-10-C0G500-180J

Capacity

C0402

2

C421,C524

47

2CC1-10-C0G500-1R0C

1P Capacity

C0402

2

C325,C357

48

2CC1-10-C0G500-1R5C

1.5P Capacity

C0402

1

C532

49

2CC1-10-C0G500-200J

20P Capacity

C0402

2

C538,C540

50

2CC1-10-C0G500-220J

22P Capacity

C0402

2

C225,C227

51

2CC1-10-C0G500-221J

221 Capacity

C0402

1

C734

52

2CC1-10-C0G500-270J

27P Capacity

C0402

1

C313

53

2CC1-10-C0G500-2R0C

2P Capacity

C0402

1

C302

54

2CC1-10-C0G500-2R5C

2.5P Capacity

C0402

1

C539

55

2CC1-10-C0G500-3R0B

3P Capacity

C0402

3

C226,C305,C541

56

2CC1-10-C0G500-330J

33P Capacity

C0402

3

C355,C326,C555

57

2CC1-10-C0G500-390J

39P Capacity

C0402

1

C526

58

2CC1-10-C0G500-470J

47P Capacity

C0402

3

C306,C504,C711

59

2CC1-10-C0G500-4R0C

4P Capacity

C0402

5

C324,C332,C333,C364,C510

60

2CC1-10-C0G500-5R0C

5P Capacity

C0402

4

C314,C315,C356,C503

61

2CC1-10-C0G500-680J

68P Capacity

C0402

1

C323

62

2CC1-10-C0G500-6R0C

6P Capacity

C0402

1

C500

63

2CC1-10-C0G500-820J

82P Capacity

C0402

1

C560

64

2CC1-10-C0G500-R50B

0.5P Capacity

C0402

4

C343,C362,C529,C530

65

2CC1-10-X5R100-474K

474 Capacity

C0402

1

C720

66

2CC1-10-X5R6R3-105K

105 Capacity

C0402

8

C213,C215,C217,C377,C431,C442,C739,
R27

67

2CC1-10-X7R100-393K

393 Capacity

C0402

1

C737

68

2CC1-10-X7R100-683K

683 Capacity

C0402

3

C209,C210,C707

69

2CC1-10-X7R160-104K

104 Capacity

C0402

22

C100,C101,C102,C105,C108,C223,C224,
C334,C345,C379,C507,C515,C550,C565,
C606,C617,C619,C621,C701,C713,C716,
C723

70

2CC1-10-X7R160-333K

333 Capacity

C0402

4

C361,C600,C722,C732

PT6700 Service Manual

20

71

2CC1-10-X7R160-473K

473 Capacity

C0402

2

C211,C212

72

2CC1-10-X7R160-681K

681 Capacity

C0402

3

C602,C610,C614

73

2CC1-10-X7R160-683K

683 Capacity

C0402

2

C615,C705

74

2CC1-10-X7R250-123K

123 Capacity

C0402

1

C709

75

2CC1-10-X7R250-472K

472 Capacity

C0402

1

C719

76

2CC1-10-X7R500-102K

102 Capacity

C0402

26

C103,C114,C219,C304,C322,C329,C347,
C351,C366,C412,C439,C449,C451,C506,
C509,C511,C512,C513,514,C519,C520,C
542,C543,C552,C554,C725

77

2CC1-10-X7R500-103K

103 Capacity

C0402

12

C3,C27,C106,C109,C205,C430,C444,C45
2,C527,C605,C700,C735

78

2CC1-10-X7R500-153K

153 Capacity

C0402

4

C708,C717,C721,C728

79

2CC1-10-X7R500-182K

182 Capacity

C0402

3

C341,C342,C508

80

2CC1-10-X7R500-222K

222 Capacity

C0402

1

C706

81

2CC1-10-X7R500-223K

223 Capacity

C0402

3

C200,C201,C612

82

2CC1-10-X7R500-392K

392 Capacity

C0402

5

C2,C206,C601,C609,C712

83

2CC1-10-X7R500-332K

332 Capacity

C0402

1

C616

84

2CC1-10-X7R500-471K

471 Capacity

C0402

89

C25,C48,C107,C111,C115,C116,C202,C2
03,C204,C207,C208,C218,C220,C221,C2
22,C228,C229,C230,C232,C233,C234,C2
35,C236,C300,C301,C307,C316,C320,C3
36,C337,C338,C339,C340,C346,C349,C3
50,C352,C353,C367,C368,C369,C370,C3
72,C373,C420,C423,C424,C427,C428,C4
29,C432,C433,C434,C435,C436,C438,C4
40,C441,C443,C445,C448,C450,C454,C5
16,C517,C518,C521,C522,C528,C531,C5
33,C535,C556,C557,C558,C559,C561,C5
62,C563,C564,C618,C620,C710,C714,C7
24,C726,C730,C738,R629

85

2CC1-16-C0G500-100C

10P Capacity

C0603

1

C402

86

2CC1-16-C0G500-1R0C

1P Capacity

C0603

1

C437

87

2CC1-16-C0G500-1R5C

1.5P Capacity

C0603

1

C404

88

2CC1-16-C0G500-200J

20P Capacity

C0603

2

C401,C407

89

2CC1-16-C0G500-270J

27P Capacity

C0603

1

C410

90

2CC1-16-C0G500-2R0C

2P Capacity

C0603

2

C403,C415

91

2CC1-16-C0G500-3R5C

3.5P Capacity

C0603

1

C405

92

2CC1-16-C0G500-4R0C

4P Capacity

C0603

1

C417

93

2CC1-16-C0G500-5R0C

5P Capacity

C0603

3

C365,C414,C416

94

2CC1-16-C0G500-6R0D

6P Capacity

C0603

1

C409

95

2CC1-16-X7R500-471K

471 Capacity

C0603

1

C411

PT6700 Service Manual

21

96

2CC1-20-X7R6R3-475K

4.7uF/6.3V
Capacity

E_0805

21

C104,C110,C112,C117,C231,C319,C344,
C348,C378,C446,C453,C505,C553,C607,
C608,C611,C622,C702,C704,C727,C731

97

2CC1-20-Y5V160-106Z

10uF/16V
Capacity

E_0805

1

C26

98

2CT1-TP20-6R3-4R7M

4.7uF/6.3V Ta
Capacity

E_0805

1

C551

99

2CT1-TS32-160-1R0M

1uF/16V Ta
Capacity

E_1206

1

C359

100

2CT1-TS32-350-R10M

0.1uF/35V Ta
Capacity

E_1206

2

C358,C360

101

2CT1-TS32-6R3-150M

15uF/6.3V Ta
Capacity

E_1206

2

C1,C376

102

2CT1-TS35-100-470M

47uF/10V Ta
Capacity

E_1412

2

C4,C715

103

2LH1-R401R5-R03-05

3T Inductance

L_1_3T

10

L400,L401,L403,L406,L507,L509,L510,L
511,L513,L515

104

2LH1-R401R5-R04-05

4T Inductance

L_1_3T

1

L402

105

2LH1-R401R5-R08-05

8T Inductance

L_1_8T

1

L408

106

2LH1-R501R5-L05-05

5T Inductance

5T 1 L407

107

2LL1-16-12NJ

12nH
Inductance

L_1_0603

1

L412

108

2LL1-16-1R0K

1uH
Inductance

L_1_0603

1

L503

109

2LL1-16-22NJ

22nH
Inductance

L_1_0603

1

L311

110

2LL1-16-27NJ

27nH
Inductance

L_1_0603

1

L410

111

2LL1-16-33NJ

33nH
Inductance

L_1_0603

1

L313

112

2LL1-16-3N9D

3.9nH
Inductance

L_1_0603

1

L405

113

2LL1-16-3R3K

3.3uH
Inductance

L_1_0603

2

L309,L323

114

2LL1-16-82NJ

82nH
Inductance

L_1_0603

2

L307,L310

115

2LL1-16-R22J

220nH
Inductance

L_1_0603

3

L306,L319,L324

116

2LL1-16-R56KA

560nH
Inductance

L_1_0603

1

L300

117

2LP1-20-27NG

27nH
Inductance

L_2_1206

1

L308

PT6700 Service Manual

22

118

2LW1-16UC-180J

18nH
Inductance

L_2_0603

3

L301,L304,L500

119

2LW1-16UC-181J

180nH
Inductance

L_1_0603

1

L321

120

2LW1-16UC-331K

330nH
Inductance

L_1_0603

1

L303

121

2LW1-16UC-560J

56nH
Inductance

L_2_0603

1

L502

122

2LW1-16UC-680J

68nH
Inductance

L_2_0603

2

L501,L506

123

2LW1-20UC-221J

220nH
Inductance

L_2_0805

1

L409

124

2LW1-25UC-103J

10uH
Inductance

L_2_1008

1

L305

125

2LW1-25UC-331K

0.33uH
Inductance

L_2_1008

1

L504

126

2LW1-25UC-561J

0.56uH
Inductance

L_2_1008

1

L505

127

2LW1-32UC-170J

17nH
Inductance

L_2_1206

1

L322

128

2RA1-EVM2NSX80B54

50K
Resistance

VR2

1

VR601

129

2RA1-EVM2NSX80BS4

68K
Resistance

VR1

1

VR600

130

2RE1-10-2201

2.2K
Resistance

R0402

4

R24,R101,R103,R106

131

2RE1-16-1503

150K
Resistance

R0603

8

R419,R420,R421,R426,R427,R429,R430,
R529

132

2RS1-10-000O

0R Resistance

R0402

18

R41,R108,R111,R220,R226,R345,R404,R
418,R604,R623,R711,R744,R747,R749C
214,C567,C703,C741

133

2RS1-10-100J

10R Resistance

R0402

8

R4,R202,R219,R231,R233,R300,R308,R3
24

134

2RS1-10-562J

100R
Resistance

R0402

5

R221,R321,R503,R541,R612

135

2RS1-10-102J

1K Resistance

R0402

21

R109,R118,R119,R207,R214,R222,R223,
R227,R229,R230,R234,R235,R301,R304,
R329,R341,R402,R408,R511,R520,R754

PT6700 Service Manual

23

136

2RS1-10-103J

10K
Resistance

R0402

19

R25,R100,R104,R105,R116,R117,R327,R
337,R338,R339,R340,R344,R501,R519,R
622,R630,R710,R731,R753

137

2RS1-10-104J

100K
Resistance

R0402

14

R107,R208,R213,R342,R504,R525,R528,
R605,R614,R703,R721,R725,R734,R741

138

2RS1-10-105J

1M Resistance

R0402

9

R428,R526,R530,R531,R532,R533,R534,
R535,R718

139

2RS1-10-122J

1.2K
Resistance

R0402

2

R540,R620

140

2RS1-10-123J

12K
Resistance

R0402

1

R602

141

2RS1-10-124J

120K
Resistance

R0402

1

R715

142

2RS1-10-151J

150R
Resistance

R0402

2

R333,R513

143

2RS1-10-152J

1.5K
Resistance

R0402

1

R409

144

2RS1-10-153J

15K
Resistance

R0402

7

R315,R334,R335,R336,R610,R621,R625

145

2RS1-10-154J

150K
Resistance

R0402

3

R232,R303,R314

146

2RS1-10-182J

1.8K
Resistance

R0402

1

R617

147

2RS1-10-183J

18K
Resistance

R0402

4

R611,R720,R724,R732

148

2RS1-10-184J

180K
Resistance

R0402

3

R537,R704,R735

149

2RS1-10-204J

200K
Resistance

R0402

1

R302

150

2RS1-10-220J

22R
Resistance

R0402

6

R305,R323,R413,R515,R522,R716

151

2RS1-10-221J

220R
Resistance

R0402

4

R203,R204,R523,R527

152

2RS1-10-223J

22K
Resistance

R0402

3

R606,R705,R736

153

2RS1-10-224J

220K
Resistance

R0402

3

R102,R709,R727

154

2RS1-10-241J

240R
Resistance

R0402

2

R310,R328

155

2RS1-10-271J

270R
Resistance

R0402

3

R309,R318,R405

PT6700 Service Manual

24

156

2RS1-10-272J

2.7K
Resistance

R0402

2

R313,R331

157

2RS1-10-273J

27K
Resistance

R0402

3

R224,R433,R521

158

2RS1-10-274J

270K
Resistance

R0402

3

R325,R326,R701

159

2RS1-10-330J

33R
Resistance

R0402

1

R412

160

2RS1-10-332J

3.3K
Resistance

R0402

4

R312,R508,R518,R536

161

2RS1-10-333J

33K
Resistance

R0402

7

R200,R201,R211,R212,R608,R712,C29

162

2RS1-10-334J

330K
Resistance

R0402

2

R228,R502

163

2RS1-10-392J

3.9K
Resistance

R0402

6

R2,R206,R416,R618,R627,R632

164

2RS1-10-393J

39K
Resistance

R0402

2

R414,R631

165

2RS1-10-394J

390K
Resistance

R0402

1

R722

166

2RS1-10-470J

47R
Resistance

R0402

1

R400

167

2RS1-10-471J

470R
Resistance

R0402

2

R514,R609

168

2RS1-10-472J

4.7K
Resistance

R0402

10

R1，R205，R209，
R210,R322,R343,R406,R407,R500 R706

169

2RS1-10-473J

47K
Resistance

R0402

19

R112,R113,R114,R115,R215,R216,R217,
R218,R236,R238,R239,R240,R241,R401,
R410,R415,R506,R746,R748

170

2RS1-10-474J

470K
Resistance

R0402

5

R3,R516,R702,R717,R726

171

2RS1-10-560J

56R
Resistance

R0402

1

R510

172

2RS1-10-561J

560R
Resistance

R0402

2

R330,R332

173

2RS1-10-562J

5.6K
Resistance

R0402

8

R225,R317,R403,R601,R713,R714,R728,
R737

174

2RS1-10-563J

56K
Resistance

R0402

7

R431,R505,R524,R600,R607,R619,R624

PT6700 Service Manual

25

175

2RS1-10-564J

560K
Resistance

R0402

3

R512,R626,R752

176

2RS1-10-682J

6.8K
Resistance

R0402

1

R603

177

2RS1-10-683J

68K
Resistance

R0402

1

R615

178

2RS1-10-684J

680K
Resistance

R0402

1

R733

179

2RS1-10-821J

820R
Resistance

R0402

4

R316,R319,R320,R613

180

2RS1-10-822J

8.2K
Resistance

R0402

1

R539

181

2RS1-10-823J

82K
Resistance

R0402

2

R411,R739

182

2RS1-10-913J

91K
Resistance

R0402

1

R719

183

2RS1-16-000O

0R Resistance

L_3_0603

3

L100,L411,L508

184

2RS1-16-153J

15K
Resistance

R0603

1

R417

185

2RS1-32-R47J

0.47R
Resistance

R1206

3

R422,R423,R424

186

2RT1-NTH5G16P42B104K

100K
Thermistor

R0603

1

R507

187

3CF1-BL112-14RL

FFC/FPC
Connector

PT7200_EXT
_CON

1

J100

188

3FW1-42932-302320

3A Fuse

FUSE_3A

1

F100

189

3ST1-SKRTLBE010

ALARM
contact switch

SW_ALPS_1

1

K200

190

4PE1-16-F2-A

RED

Light-emitting
diodes

RED_LED_06
03

1

D201

191

4PE1-16-F5

GREEN

Light-emitting
diodes

GREEN_LED
_0603

2

D202,D203

192

5FC1-DSF51R6M-0705

51.65MHz

Crystal filter

BW_51.65M

1

Z1

193

5FE1-BLM11A221SPT

EMI filter

603

1

L700

194

5FE1-BLM11A601S

EMI filter

L_3_0603

17

L104,L200,L201,L202,L203,L314,L315,L
316,L317,L318,L320,L414,L512,L516,L6
00,L601,L701

195

5FE1-BLM21P300S

EMI filter

805

6

L1,L101,L102,L103,L413,L415

PT6700 Service Manual

26

196

5FT1-LTWC450G

450G Ceramic
Filters

CF450_SMD

1

CF500

197

5OT1-12R8-CEC3-0503

12.8M TCXO

TCXO_12.8M

1

X300

198

5XT1-CSTCR-7R30G53

7.3M R

Ceramic
resonator

XTAL_7.3M

1

X200

199

7MHP-7042-12A-W

7.5V
PT568battery
connector

BATTARY_P
T567

1

DC

203

2RW3-TP76N97N15FB103

Volume Switch

POW&VOL

1

POW&VOL

204

3SE3-ED08731616HCF18

Channel Switch

SW200

1

SW200

205

5XT3-JTBM450C24

C24_450 R

Ceramic
resonator

CD500

1

CD500

No.

Part No.

Name

Specifications

Qty. 1 7MHP-7210-01A-W0

Front cover

PC+ABS, black, surface-treatment, ROHS

1 2 7MHP-7069-02A-W0

Top cover

PC+ABS, black, surface-treatment, ROHS

1 3 7MHP-7069-03A-W0

PTT Side cover

PC+ABS, black, surface-treatment, ROHS

1 4 7MHP-7069-04A-W0

PTT cover

PC+ABS,black, surface-treatment, ROHS

1 5 7MHP-7210-02A-W0

MIC seal

PC+ABS,black, surface-treatment, ROHS

1

6

7MHP-7069-06A-W0

Battery latch

PC+ABS, black, surface-treatment

1
7

7MHP-7210-03A-W0

Rotary encoder

ABS, black, surface-treatment, ROHS

1 8 7MHP-7210-04A-W0

Volume knob

ABS, black, surface-treatment, ROHS

1 9 7MHP-7069-10A-WC

Light guide

PC, transparent, ROHS

1

10

7MHR-7069-02A-W0

PTT key

Silica gel, black, hardness 60°, ROHS

1

11

7MHR-7210-01A-W3

Emergency alarm key

Silica gel, orange, hardness 60°, ROHS

1

12

7MHR-7069-04A-W0

water-proof gasket

Silica gel, black, hardness 40°, ROHS

1

13

7MHR-7069-05A-W3

天窗 water-proof gasket

Silica gel, orange, hardness 60°, ROHS

1

14

7MHR-7210-02A-W0

top water-proof

Silica gel, black, hardness 60°, ROHS

1

15

7MHR-7069-07A-W0

Water-proof gasket for
chassis

Silica gel, Silica gel, hardness 60°, ROHS

1
16

7MHR-1727-09A-W3

Radio MIC cover

Silica gel, hardness 40°, orange, no surface treatment

1

17

7MHR-7042-06B-W0

Heat-conducted silica gel
gasket

Silica gel, Silica gel, 3*6*9mm, ROHS

1

18

3CR7-SMA-50JFB-4

RF co-axis connector

SMA-J, installation by flange plate (558, pitch 14mm,
core length 10.5mm)

1

19

7NRC-060100035-B1

Nut for knob

Brass, inner diameter M6mm, outer diameter φ10mm,
depth 3.5mm, black passivated

2
20

7NRC-087120036-Z

Nut for antenna

Brass, inner diameter M8.7mm, outer diameter φ12mm,

1

Appendix 3 Structural Parts List

PT6700 Service Manual

27

connector

depth 3.6mm, black Ni-plated

21

7MHL-7069-01A-W

Al alloy bracket

Al alloy (ADC12), ROHS

1

22

7MHF-7069-02A-W

天窗 Cover

0.5MM,SUS304, ROHS

1

23

7MHS-7069-04A-W

PTT key

METAL DOME, ROHS

1

24

7MHS-1140-01A-W

Circlip for knob

Spring steel

2

25

7MHS-1010-02A-N

spring

Spring steel, Ni-plated, wire diameter 0.2, OD 2, H 9.5,
number of turns 11

2
26

7MHS-7210-01A-W

Speaker packing sheet

Spring steel, D 0.7mm, ROHS

1

27

4SS7-4564-016-100

φ45 Speaker

16OHM 1W, diameter 45MM, H 6.4MM, IP67

1
28

7GCB-3950001

φ39.5 Net for speaker

Black dustproof net,φ39.5mm (diameter) * 0.1mm (D)

1

29

7GCM-074044

Water-proof gasket for
MIC head

DY-E002Afilm,φ7.4xφ4.4, ROHS

1

30

7GCJ-S1867-01

Paster for earphone PCB
board

Double-sided adhesive tape

1

31

7SMF-020040M-SZY
B-N

M2*4 Flat round cross
head machine screw

Steel hardened, Φ2mm*4mm, Flat round cross head
machine screw, nylon patch

16

32

7SMF-020080M-MH
HT-N1

M2*8 Thick head
machine screw

Steel hardened, Φ2mm*8mm Torx thick head Ni-plated

machine screw, metric coarse thread

2

33

7SMF-025080M-SZY
B-Z1

M2.5*8 Flat round cross
head machine screw

Steel hardened, Φ2.5mm*8mm Flat round cross head

black Zn-plated machine screw, metric coarse thread

2

34

7SSF-030040M-YXH

P-BA

M3*4 Washer added
screw (screw on the
earphone cover)

Screw on the earphone cover, SUS303, ROHS

1

35

7MHR-7069-08A-W0

O-type ring

D2.4X1.0MM, ROHS

2

Name

Model

Specifications

External View

Antenna

PT6500

Belt clip

DP770

Screw

M2.5X8.0

Appendix 4 Accessories

PT6700 Service Manual

28

Battery

KB-77B
Hand Strap

KGS-01

Charger

KBC-77Q

Power Adaptor

KTC-24

PT6700 Service Manual

29

Figure 1 PT6700 Block Diagram

PT6700 Service Manual

30

Figure 2 PT6700 Schematic Circuit Diagram

PT6700 Service Manual

31

PT6700 Service Manual

32

PT6700 Service Manual

33

PT6700 Service Manual

34

PT6700 Service Manual

35

PT6700 Service Manual

36

PT6700 Service Manual

37

PT6700 Service Manual

38

Figure 3 PT6700 Top Layer Position Mark Diagram

PT6700 Service Manual

39

Figure 4 PT6700 Bottom Layer Position Mark Diagram

PT6700 Service Manual

40

Figure 5 PT6700 Top Layer Position Value Diagram

PT6700 Service Manual

41

Figure 6 PT6700 Bottom Layer Position Value Diagram