Kirisun PT568 Service Manual

PT568 Service Manual

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 Electronics (Shenzhen) Co., Ltd owns the copyright of

KSP568 software.

Unauthorized Duplication of KSP568 software is strictly

prohibited.

Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of

the MCU software code.

Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of

the radio outward appearance/structure/circuit design.

Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of

this service manual. Unauthorized publication is prohibited.

Kirisun Electronics (Shenzhen) 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............................................ 11

Chapter 6 Adjustment............................................................... 12

Chapter 7 Specifications........................................................... 15

Chapter 8 Troubleshooting ....................................................... 15

Chapter 9 KBC-70Q Charger ................................................... 17

Appendix 1 Abbreviations........................................................ 18

Appendix 2 Electronic Parts List.............................................. 18

Appendix 3 Structural Parts List .............................................. 22

Appendix 4 Accessories ........................................................... 23

Figure 1 PT568 Block Diagram................................................ 24

Figure 2 PT568 Schematic Circuit Diagram............................. 25

Figure 3 PT568 Top Layer Position Mark Diagram .................26

Figure 4 PT568 Bottom Layer Position Mark Diagram ........... 27

Figure 5 PT568 Top Layer Position Value Diagram................. 28

Figure 6 PT568 Bottom Layer Position Value Diagram ........... 29

PT568 Service Manual

Chapter 1 Overview

1.1 Introduction

This manual applies to the service and maintenance of PT568

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

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.

to download the latest service manual or contact

If you want to apply for any component from Kirisun, please

fill in an application form as below.

e.g.

Component Application Form

Radio

Component

Model

PT568-01 FET Q11 2SK3476 105-SK3476-R01 1

PT568-02 Triode Q57 2SC5108(Y) 104-SC5108-001 1

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.

Position

Mark

Model/

Specifications

Part No. Qty

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.

② Channel Selector Knob

PT568 Service Manual

Rotate the knob to select channel 1-16.

③ On/Off/Volume Control Knob

Turn clockwise until you hear a click to turn the radio power

on. Turn counterclockwise until you hear a click to turn it off.

Rotate it to adjust the volume after turning on the radio.

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

BUFFER

DATA FROM MCU

CLK FROM MCU

LE FROM MCU

PS FROM MCU

LOCK TO MCU

QT/DQT FROM MCU

CENTER FREQUENC Y ADJUST F ROM MCU

12.8MHz

PLL IC

12.8MHz TO

TCXO

51.2MHz

TXVCO

MODE

NOISE AMP

BUFFERRXVCO

RIPPLE FILTER

DET COLL

TA31136NOISE DETBUSY SIGNEL TO MCU

450KHz

+/- 7.5KHz

Figure 3.1 Frequency Configuration

The reference frequency of the frequency synthesizer is

provided by crystal oscillator X4 (TCXO, 12.8MHz). 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 X4 (TCXO, 12.8MHz). Transmitter signal is

directly produced by the frequency synthesizer.

3.2 Principle of Receiver (RX)

5T5R

AMP

TX/RX SW

AMP

51.65MHz +/- 15KHz

MIXER

Front end

The signal coming from the antenna passes through the

RX/TX switch circuit (D1, D2, D4 and D5), and passes through a

BPF comprises of C37, C227, L8, L15, C70, C126, D30, C218,

L9, C230, C128, D26, C217, L10, C229, C127 and D24 to

remove unwanted out-of-band signal, and is sent to the low noise

amplifier (LNA) consists of Q20 and its peripheral components to

be amplified.

Output signal from the LNA passes through a BPF comprises

of L7, C228, C47, D23, C219, L6, C182, C124, D22, C216, L5,

C132, C32 and D21 and goes to the first mixer (Q19).

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 (D21, D22, D23, D24, D26 and D30).

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 (XF1 and XF2) 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 (Q21), and is sent to the IF processing IC (IC5,

TA31136).

IF IC consists of second mixer, second local oscillator, IF

amplifier, limiter, discriminator, and noise amplifier.

The 12.8MHz frequency produced by TCXO (X4) 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 IC5 to generate the second IF (450kHz). And then

the second IF signal is amplified and limited in IC5, filtered by the

ceramic filter (CF1, 450kHz), and demodulated in IC5 to output

audio signal.

Figure 3.2 Principle of Receiver

Figure 3.3 IF System

PT568 Service Manual

Audio signal processing

The voice signal processing circuit of the receiver consists of

IC6 and its peripheral circuits. After being amplified in IC6-C,

voice signal from IC5 is sent to IC4 (CTCSS signal filtering

circuit) and IC6-D respectively. The signal is then amplified,

deemphasized and filtered by other units of IC6 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 Q9 for amplification. The amplified signal is adjusted by

the volume potentiometer and then is sent to the audio power

amplifier (IC8).

Figure 3.4 Audio Processing of Receiver

Squelch circuit

The demodulated signal from IC5 goes to the selective noise

amplifier consists of internal noise amplifier of IC5, C211, R99,

R100, C107 and R94 to remove the noise component. The

resulting signal is then amplified by Q7 and demodulated by D17

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 IC8 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, Q35 turns on, IC8 starts to

operate, and the speaker makes sound. Speaker impedance: 16.

Q38: Receiving audio signal switch

Q51: Warning tone switch

Q25: Alert tone switch

CTCSS/DCS signal filtering

Audio signal demodulated by IC5 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 Tr ansmitter (TX) TX power amplification

Figure 3.5 Principle of Power Amplifier and Antenna Switch

The modulated RF signal from VCO is amplified by Q2, Q3

and Q12, and is sent to Q11 for power amplification.

Grid bias of Q11 and Q12 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

R167, R168 and R169 are used to test the power amplification

current. IC3A is the sampling amplifier for the power

amplification current. IC3B is the power comparator amplifier.

If the Tx output power is too high, the power amplification

current and IC3A output will increase; IC3B output voltage will

decrease, so the bias voltage of Q11 and Q12 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

IC3B.

Tx voice signal processing

MIC Amp

MIC

IC7A

Pre-Emphasis

MCU

CTCSS/DCS

IC7B

IC7C,IC7D

Figure 3.7 Transmitter Audio Circuit

VCO

TCXO

PT568 Service Manual

The Tx voice signal processing circuit consists of IC7 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 D13, D308 and Q24. When signal

from MIC is too large, the AGC circuit will lower the signal

strength to make sure that no distortion happens to the signal.

Q34 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

Data CK

to MCU

DCS Mod

TCXO

Freq Adj

to MCU VCCN

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 Q14, L30, C120, C88, C142, C180,

D8 and D9. Tx VCO unit consists of Q15, L51, C121, C137,

C206, C194, D10 and D11. D12 is the modulation circuit of VCO.

IC1 (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 R244, C193, R202, R40, C207,

R141, C205, R2 and C204. The reference frequency is provided

by X4 (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 IC1 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.

Detect

Charge Pump

VCO

MOD in

Control Circuit

Figure 3.8 Frequency Synthesizer

D3,D6

N=F

VCO/FR

N: Times of frequency division

: Oscillation frequency of VCO

VCO

: 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.

Q6: 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.

IC15 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 (Q11 and Q12) and the Rx audio power

amplifier (IC8) directly adopt the battery for power supply. Power

of other circuits is supplied by 5V regulated voltage.

IC12: 5V low dropout, micro-power regulator, which supplies

5V power with large current for the radio together with Q10 and

Q30.

Q29: 5T switch, which is controlled by MCU.

5T: Supplies power for front end of Tx.

Q31: 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.

Q32: 5C switch, which is controlled by MCU.

5C: 5V power supply under SAVE control. Supplies power for

frequency synthesizer.

3.7 MCU Unit

PT568 Service Manual

to PLL

APC CONTR

D/A

5TC

5RC SAVE

IC9

EEPROM

chananl

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 (E

PROM, A T24C08):

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.

RXD

to PC

DATA

IC10

MCU

TXD

PTT

MONI

VCCN

BEEP

CTCSS/DCS OUT

VIOCE CHIP

TX/RX CONTROL

SHIFT

PF1

ALARM

SQL

BATT

CTCSS/DCS IN

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.

PT568 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

No. Frequency

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

[Hz]

No. Frequency

[Hz]

No. Frequency

[Hz]

No. Frequency

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.

PT568 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 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.

[Hz]

PT568 Service Manual

Table 3.2 DCS Codes

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

3.8 Semiconductor Data

Refer to table 3.3 for descriptions of each pin.

Table 3.3 Definition of CPU Pins

No. Port name

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

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

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

28 TXD P66 O RS-232C output, programming test point

Name

I/O Function

Connect the 4.7K resistor with VCC,

programming test point

Wideband/Narrowband control

H: Wideband, L: Narrowband

PLL circuit unlock detect pin

H: locked, L: unlocked

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)

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

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

52 AFCO1 P37 I Audio control switch 1

Connect the pull-up resistor with VCC, and

connect the pull-down resistor with VSS

Battery saving control, H: supply power, L:

power saving

Alarm switch control, H: controlled by volume

switch

Radio should be in low level in emergency

alarm

Table 3.4 Function Description of Semiconductor Components

Position

Mark

IC1 MB15E03 Frequency synthesizer

IC4 NJM2904 APC, voltage comparison, driving

IC5 TA31136 Rx second local oscillation, second IF

IC6 NJM2902 Amplification and filtering of demodulation

IC7 NJM2902 MIC amplification, limitation and filtering

IC8 TDA8541 Audio frequency power amplification of receiver

IC9 AT24C08 E2PROM, memorizes channel frequency data,

IC10 R5F212A8 MCU

IC11 PST9140NR MCU reset circuit

IC12 HT7150-1 LDO, low-power voltage regulator

IC15 W588A080 Voice storage IC

Q2 2SC5108 First amplification of transmitter

Q3 2SC3356 Second amplification of transmitter

Q4 2SC5108 VCO buffer amplifier

Q5 2SC5108 VCO buffer amplifier

Q6 2SC4617 VCO power supply filter

Q7 2SC4738 Noise amplifier

Q9 2SC4617 Audio frequency signal amplification of receiver

Q10 2SC1623 5V voltage regulation output current stretching

Q11 2SK3476 Transmitter final power amplification

Q12 RD01MUS1 Transmitter power amplification driving

Q17 DTA144EE APC output switch

Q19 3SK318 First mixer

Q20 3SK318 Receiver high power amplifier

Model Function Description

amplification, limitation, demodulation, and noise amplification

signal of receiver.

function setting parameters and adjusting status parameters

PT568 Service Manual

Q21 KTC4082 1st IF Amplifier

Q22 DTC144EE Red LED Driving

Q23 DTC144EE Green LED Driving

Q24 2SK1824 Voice alert switch

Q26 DTC144EE 5C switch

Q29 KTA1298 5T switch

Q30 KTA1298 5V voltage regulation output current stretching

Q31 KTA1298 5R switch

Q32 KTA1298 5C switch

Q34 DTA144EE Power switch of MIC amplification unit

Q35 2SK1824 Receiver audio output switch. Disconnect on

Emergency

Q36 2SK1824 Receiver audio output switch

Table 3.5 Function Description of Diodes

Position

Mark

D1 MA77 Transmitter antenna switch diode

D2 HVC131 Transmitter antenna switch diode

D3 HSC277 VCO output switch

D4 HVC131 Antenna toggle switch

D5 HVC131 Antenna toggle switch

D6 HSC277 VCO output switch

D7 HSC277 5V voltage regulation output current stretching

D8 HVC376B VCO oscillation varactor diode

D9 HVC376B VCO oscillation varactor diode

D12 MA360 VCO modulation diode

D14 HZU5ALL APC output voltage-limiting diode

D15 MA2S111 Unlock detection diode

D16 MA2S111 VCO power filtering acceleration diode

D17 1N4148 Noise demodulation

D18 1N4148 Noise demodulation

D20 Green LED Receiving indicator

D25 MA2S111 APC single diode

D28 Red LED Transmitting indicator

D29 Green LED Receiving indicator

Nominal center frequency 51.65MHz

Pass band width ±7.5kHz or higher

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

Terminal impedance 1.2k

Nominal center frequency 450kHz

6dB band width ±6kHz or higher

50dB band width ±12.5kHz or lower

Pulse 2.0dB or lower

Insertion loss 6.0dB or lower

Guarantee attenuation 35.0db or higher

Terminal impedance 2.0k

Table 3.8 Schematic Diagram for Packaging of Semiconductor

Model Function Description

Table 3.6 Features of Crystal Filter XF1, XF2

Item Rated Value

Table 3.7 Features of CF1 LTVPC450EB

Item Rated Value

Devices

RD01MUS1

GSD

2SC5108

M: MC

KTA1298

2SC3356

M: R24

FMMT591

RD07MVS1

RDA0002

2SC4617

DTC144EE

M:16

HT7150-1

GNDINOUT

2SC4738

DTA144EE

2SK1824

Mark: B1

KTC4082

2SK308NV

2SC1623

M: L6

3SK318 M: YB-

DA221 M: K

Chapter 4 Mode Introduction

Mode Introduction

Mode Function How to enter

User Mode For normal use Power ON

Data Programming Mode

PC Test Mode

Mode

Firmware Programming Mode

Wired Clone Mode

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

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

KSP568 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 KSP568 on the computer. B. Connect the radio to the serial port of the PC with the

special programming cable (KSPL-09). Refer to the

figure below.

Used to read and write frequency data and other features to and

Received commands

from PC. from the radio

Tune the radio parameters by PC

Received commands

from PC.

Press and hold the top Upgrade the radio when new features are released

key for over 2 seconds

while turning the radio

power ON, and received

commands from PC

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

PT568 Service Manual

Computer

(RS232 serial port)

Programming

cable

Figure 4.1

C. Turn the computer power ON. D. Turn the radio power ON. E. Run the KSP568 programming software by double

clicking on its executive program.

F. Click “Program” in the main menu of KSP568, and click

“Read from radio” in the pull-down menu to read

parameters of the radio to the computer; click “Write to

radio” in the pull-down menu to write parameters in the

computer to the radio.

G. The following parameters can be set by using KSP568

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: P1, P2, P3 can be set as long/short key and

the hold time can be defined.

No. Function Description

0 None No function is assigned.

Voice

Annunciation

2 Talk Around

3 Lone Worker

Emergency

Alarm

Emergency

Alarm Off

6 Scan

Nuisance

Delete(tempo

rary)

High/Low

Power Switch

Momentary

Monitor

Press the preprogrammed “Voice Annunciation” button to

change the language and mode of voice annunciation.

Meanwhile, the current channel number can be heard.

When the preprogrammed “Talk Around” button is

ressed, the next transmission will be at the same

frequency as at which it is received.

Press the preprogrammed “Lone Worker” button to

start/stop lone working.

Press the preprogrammed “Emergency Alarm” button to

make warning tone according to the setting of the

rogramming software or send your ID or background

sound to your partner or the system. (This function can

only be assigned to the TOP KEY)

Press the preprogrammed “Emergency Alarm Off” button

to quit the Emergency Alarm Mode. (This function can

only be assigned to the TOP KEY, and should be used

together with Emergency Alarm function)

Press the preprogrammed “Scan” button to start/stop

scanning.

If the radio stays at a noise channel while scanning, press

the preprogrammed “Nuisance Delete” button to delete the

nuisance channel temporarily.

Press the preprogrammed “High/Low Power Switch”

utton to switch between high and low transmitting power

of the radio.

Press and hold the preprogrammed “Momentary Monitor”

utton to disable CTCSS, DCS signalling, and release the

button to resume normal operation.

Radio

(Earphone/Program

ming interface)

Press the preprogrammed “Monitor” button to disable

10 Monitor

Momentary

Squelch Off

12 Squelch Off

Lone Worker

Reset

14 FCS Press to start free channel scanning (FCS).

CTCSS, DCS signalling, and you can receive signals that

cannot be heard under normal operation. Press it again to

resume normal operation.

Press and hold the preprogrammed “Momentary Squelch

Off” button to open squelch; release it to resume normal

operation

Press the preprogrammed “Squelch Off” button to open

squelch. Press it again to resume normal operation.

Press the preprogrammed “Lone Worker Reset” button

while the radio is in Lone Worker Mode to reset the lone

worker timer, and the timer starts again.

2) Optional Functions

1. Wired Clone enable

2. All Low Power Switch

3. Firmware Programming Mode enable

4. Beep Tone

5. All Low Power

6. Voice Annunciation Setting

7. Battery Save

8. TOT

9. TOT Reset Time

10. TOT Pre-alert

11. TOT Rekey Time

12. Squelch Level Selection

3) Embedded Information

1. Password of Read Radio

2. Password of Write Radio

3. Embedded Information Setting

4) Scan

Scan function setting: Priority Channel selection, Revert

Channel selection, Tx Dwell Time, Dropout Delay Time,

Lookback Time.

FCS function setting: Automatic Tx Time, Automatic Rx Time,

FCS Resume Time, Scanning Times.

5) Emergency Setting

Press the preprogrammed “Emergency Alarm” button (the

hold time should be longer than the debounce time of the

emergency alarm switch) to enter Emergency Alarm Mode. The

radio can make warning tone according to the setting of the

programming software, or send the background sound to your

partner or the system.

Press the preprogrammed “Emergency Alarm Off” button to

+ 20 hidden pages

Kirisun PT568 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual