Kirisun PT3600 User Manual

PT3600 Service Manual

Dangerous!

Do not connect 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!

Shenzhen Kirisun Electronics Co., Ltd owns the copyright of

KSP3600 software.

Duplication of KSP3600 software is allowed.

Shenzhen Kirisun Electronics Co., Ltd owns the copyright of

the MCU software code.

Shenzhen Kirisun Electronics Co., Ltd owns the copyright of

the radio outward appearance/structure/circuit design.

Shenzhen Kirisun Electronics Co., Ltd owns the copyright of

this service manual. Unauthorized publication is prohibited.

Shenzhen Kirisun Electronics Co., Ltd owns the trademarks

“KIRISUN”, “

”, “ ”, and “科立讯”.

Contents

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

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

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

Chapter 4 Function Description and Parameter Setting.................6

Chapter 5 Disassembly for Repair.................................................9

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

Chapter 7 Specifications..............................................................13

Chapter 8 Troubleshooting ..........................................................13

Chapter 9 KBC-31A Charger ......................................................13

Appendix 1 Abbreviations...........................................................14

Appendix 2 Electronic Parts List.................................................15

Appendix 3 Structural Parts List ................................................. 21

Appendix 4 Accessories ..............................................................22

Figure 1 PT3600-01 Baseband Circuit of Main Board................ 23

Figure 2 PT3600-01 MCU Circuit of Main Board ...................... 24

Figure 3 PT3600-01 TX/RX Circuit of Main Board....................25

Figure 4 PT3600-02 Baseband Circuit of Main Board................ 26

Figure 5 PT3600-02 MCU Circuit of Main Board ...................... 27

Figure 6 PT3600-02 TX/RX Circuit of Main Board....................28

Figure 7 PT3600 Top Layer Position Mark Diagram ..................29

Figure 8 PT3600 Bottom Layer Position Mark Diagram ............30

PT3600 Service Manual

Chapter 1 Overview

1.1 Introduction

This manual applies to the service and maintenance of PT3600

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 enhance product

performance and quality. You can also log on our website

www.kirisun.com

your local dealer or us.

Please read this manual 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

PT3600 FET

PT3600 Triode

PT3600 Belt Clip

Position

Mark

Q501 RD07MVS1 105-RD07MV-001 1

Q506 2SC5108(Y) 104-SC5108-001 1

KBJ-10 1

Model/

Specifications

Part No. Qty

1.3 Service

All the Kirisun products are subject to the service warranty.

The main unit 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. Earphone

is a damageable part, and is not included in the warranty scope. 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 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.

PT3600 Service Manual

② Programmable Button 1

Functions can be assigned to this button through PC software.

③ Programmable button 2

Functions can be assigned to this button through PC software.

④ Emergency Button

Press the button to activate warning tone. Press it again to exit

the emergency alert state. Under the emergency state, all the other

switches and buttons are disabled.

⑤ Channel Selector Knob

Rotate the knob to select channel 1-16.

⑥ 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.

⑦ LED Indicator

Lights red while transmitting; lights green while receiving;

flashes red when the radio is in low power.

⑧ External Speaker/Microphone Jack Cover

Open the cover; you will see the external speaker/microphone

jacks. External speaker/microphone can be connected to the radio

through these jacks.

Chapter 3 Circuit Description

3.1 Frequency Configuration

The receiver adopts single mixing mode. The first IF is

9.375kHz. The first local oscillator signal of the receiver and the

transmitter signal are generated by the frequency synthesizer.

The reference frequency of the frequency synthesizer is

produced by TCXO.

3.2 Receiver (RX)

BAT T

POWER

AFCN

RDA1846ANT SW

AMP

FROM TX

W558

MUTE

CLK F RO M MC U

DAT A F RO M M CU

BUS Y T O MCU

AMP

MUT E

DTMF/BEEP FROM MCU

MUTE

GND

MUTE

AF POW ER AMP

Figure 3.1 Receiver Diagram

Front end

The signal coming from the antenna passes through the

RX/TX switch circuit (D511, D515, D508, and D517), and is sent

to pin 15 of U8 (RDA1846) to be demodulated and to output

GND

POWER

SP K JACK

TXD

audio signal.

Audio signal processing

The demodulated audio signal output from U8 (RDA1846)

passes through the volume potentiometer to be adjusted, and then

goes to the audio power amplifier U1 (TDA2822).

Squelch circuit

Output from pin 26 of U8 (RDA1846) is sent to the MCU.

MCU identifies the level of the noise and controls the squelch.

Audio power amplifier

The BTL type audio power amplifier circuit consists of U1

and its peripheral components.

Base electrode of Q621 is the control terminal. High level:

Open; Low level: Close.

The Rx audio signal, voice alert signal, alert tone signal and

warning tone signal are collected and passed through the audio

power 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. Speaker impedance: 16.

Note: Any terminal of the speaker should not be grounded!

CTCSS/DCS signal processing

CTCSS/DCS signal output from pin 32 of U8 (RDA1846) is

sent to MCU for decoding.

3.3 Transmitter (TX) TX power amplification

PRE

RDA1 846

DRIVER

RF PA

DRI VER

POWER SUPPLY

RF PA

ANT SW

APC

CONTROL

CURRENT

SENSING

Figure 3.2 Power Amplifier and Antenna Switch Diagram

The modulated RF signal from IC4 (RDA1846) is amplified

by Q506, Q507 and Q502, and is sent to Q501 for power

amplification. Output power of Q501: 4.5W.

Grid bias of Q502 and Q501 is controlled by the APC circuit.

Through changing the grid bias voltage, the Tx output power can

be controlled conveniently.

APC (Automatic Power Control)

APC FR OM MCU

PT3600 Service Manual

APC

POWER SUPPLY

Figure 3.3 APC Circuit Diagram

R525, R523 and R524 are used to test the power amplification

current. IC502A is the sampling amplifier for the power

amplification current. IC502B is the power comparator amplifier.

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

current and IC502A output will increase; IC502B output voltage

will decrease, so the offset voltage added to Q501 and Q502 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

IC502B.

Tx voice signal processing

MIC signal passes through the internal/external MIC switch

circuit and is sent to pin 11 of U8 (RDA1846) for carrier

modulation.

3.4 Frequency Synthesizer

The 12.8MHz reference frequency signal provided by X603 is

divided by the internal reference frequency divider of U8

(RDA1846), and is then sent to the internal phase comparator of

U8, where the signal is compared with the signal divided by the

fractional frequency divider of internal VCO. Then the output

signal is used to control the internal VCO, enabling the frequency

to reach the set value.

3.5 Voice Alert Circuit

The radio is provided with voice alert function, which is

especially useful at night or in dark environment.

IC305 is a Flash 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 “Channel Annunciation” button

to repeat the current channel number.

If Channel Annunciation function is enabled, the speaker will

annunciate the current channel number once the “Channel

Annunciation” button is pressed under standby mode. You can

switch the voice type by pressing and holding the “Channel

APC

CONTROL

CURRENT

SENSING

APC F ROM MCU

Annunciation” button 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, 1300mAh Li-Poly battery. The Tx power

amplification circuit (Q501 and Q502) and the Rx audio power

amplifier (U1) directly adopt the battery for power supply. Power

of other circuits is supplied by 3.3V regulated voltage.

Q636, Q639: 3V low dropout, micro-power regulators, which

supply 3V power with large current for the radio together with

Q637.

Q637: 3T switch, which is controlled by MCU.

3T: Supplies power for front end of Tx.

U8: 3C power supply, and supplies power for RD1846.

3.7 MCU Unit

ENCODER KEYS

CLK LE 3 RC

MUTE

WDATA

G/R LED RD A1 84 6

WSCLK

TXD

3TC

CFA

MCU

7.3MHz RE S E T

R8C/2 A/2C

EEPROM

KEYAD MODE PTT SHIFT QTOUT PABC RXD

QTIN

BATT

SQL

DTAT AFCO AP C W558C

Figure 3.4 MCU Unit Diagram

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 transmission and reception of RDA1846.

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.

PT3600 Service Manual

Memory (E

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 17, PWM wave)

generated by MCU is filtered by R359, R356, C324 and C325.

Then the resulting signal is sent to RDA1846 for modulation.

The CTCSS/DCS signal from the receiver is sent to MCU 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 signal from pin 19 of the MCU passes through low

pass filter to be changed into DC signal, 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.

PT3600 has 39 groups of standard CTCSS frequencies for

your selection (meanwhile, any CTCSS frequency between 67 and

254.1Hz is compatible). See table 3.1.

The CTCSS signal (PWM wave) 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.

No.

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

PROM, A T24C08):

Frequency

[Hz]

No.

Table 3.1 CTCSS Frequencies

Frequency

[Hz]

No.

Frequency

[Hz]

No.

Frequency

[Hz]

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.

PT3600 has 83 standard codes (normal and inverse) for your

selection. See table 3.2.

DCS signal (PWM wave) is produced by MCU. 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.

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

MCU Description

Table 3.3 Microprocessor (R8C/2A/2B) Port Description

Pin No. I/O Port Name Function

1 I/O ERDATA EEPROM data line

2 O EPCLK EEPROM clock line

3 MODE

4 I TOP KEY Top key

5 I UP KEY Up key

6 RESET Reset pin, programming test point

7 I XOUT Oscillator 7.3m

8 VSS/AVSS GND

9 I XIN Oscillator 7.3m

10 I VCC Power supply, programming test point

Connect the 4.7K resistor with VCC, programming test point

PT3600 Service Manual

Pin No. I/O Port Name Function

11 I DOWN KEY Down key

12 I PTT KEY PTT key, programming test point

13 O 3TC Tx power control

I/TRCI

15 I SQL RDA1846 SQL test input (RDA GPIO6)

16 O RDA PDN RDA1846 power supply control

17 I VOXIN RDA1846 VOX test input (RDA GPIO7)

I/TRDI

OB1

19 O SHIFT Beat shift selection

O/TRD

IOD0

O/TRD

IOC0

O/TRD

IOB0

23 I RDA GPIO4 Connect to RDA1846 GPIO4

24 I/INT1 RDA INT

25 O MAXAF Max. audio frequency

26 I RDA GPIO5 Connect to RDA1846 GPIO5

27 O AFCO Audio frequency amplifier power supply

28 O 3RC Rx power supply control

29 O UVSEL UHF and VHF switch control

30 I RDAOSC RDA crystal frequency selection

31 O RDA EN RDA1846 enabling control

32 O RDA CLK RDA1845 clock line

33 I/O RDA DATA RDA1845 data line

34 O - -

35 O - -

36 O - -

O/TXD

I/RXD

39 O - -

40 O - -

41 O - -

42 O - -

43 O - -

44 O - -

45 O - 46 O FlashClk Flash IC clock（for FLASH IC and W588）

47 I/O FlashDio Flash IC data input/output

48 O FlashCs Flash IC selection

49 O FlashDo Flash IC data output

50 I ENC0 Encoder input

51 I ENC1 Encoder input

52 I ENC2 Encoder input

53 I ENC3 Encoder input

54 O GLED Green LED control

55 O RLED Red LED control

56 O SPKC Speaker second level control switch

57 I/AN2 LOW BATT Low battery test input

58 O/DA0 BEEP

59 I VSS/AVSS MCU（GND）

60 - - -

61 I VREF A/D reference voltage

62 I VCC MCU power supply

63 - - -

64 - - -

CTCSS/CDCSS

2T/5T IN

INPUT

OUTPUT

CFA Frequency stability output (TimerD PWM)

APC

TXD RS-232C output (programming test point)

RXD RS-232C input (programming test point)

TONE test input (reserved), programming test point, connect to RDA1846 GPIO1

CTCSS/CDCSS input (TimerD input capture)，（RDA GPIO0）

CTCSS/CDCSS output（TimerD PWM ）（RDA GPIO0）

Automatic power control output (TimerD PWM)

RDA1846 interrupt signal detect （ RDA GPIO2）

Alert tone/TONE output（and connect to RDA GPIO1）

Chapter 4 Function Description and

Parameter Setting

4.1 Main Functions

4.1.1 Programmable Buttons

Long Press Duration: Amount of time that the radio-user is

required to press (and hold down) a button, for the press to be

interpreted by the radio as a long press. A short press is defined as

any button-press that is shorter than the duration.

The dealer can assign one of the following auxiliary functions

to the long press or short press of the programmable button 1 and

programmable button 2:

● None: No function is assigned.

● Monitor Momentary

Press and hold the preprogrammed Monitor Momentary button

to open squelch for monitoring the transmission on the channel

whether the CTCSS/DCS, audio squelch conditions match or not.

Release it to exit monitor mode. Press this button can also cancel

the current incoming call.

● Monitor

Press the preprogrammed Monitor button to open squelch for

monitoring the transmission on the channel whether the

CTCSS/DCS, audio squelch conditions match or not or cancel the

current incoming call. Press it again to exit monitor mode.

● Squelch Off Momentary

Press and hold the preprogrammed Squelch Off Momentary

button to open squelch momentarily, and release it to resume

normal operation. Press this button can also cancel the current

incoming call.

● Squelch Off

Press the preprogrammed Squelch Off button to open squelch,

and press it again to resume normal operation. Press this button

can also cancel the current incoming call.

● Channel Annunciation

Press the preprogrammed Channel Annunciation button, the

current channel number can be heard.

● Scan

Press the preprogrammed Scan button to start scanning (the

scan list should be effective), press it again during the scanning to

stop scanning.

● High/Low Power Switch

Press the preprogrammed High/Low Power Switch button to

switch the current channel power between high and low.

● Battery Check

Press the preprogrammed Battery Check button, the current

battery power level can be heard. There are four levels in all.

PT3600 Service Manual

Level 4 indicates that the battery power is full, and level 1

indicates that the battery power is low.

● Squelch Adjust

Press the preprogrammed Squelch Adjust button to change the

current squelch level, and the squelch level after the change can be

heard.

4.1.2 VOX

VOX function enables you to use the radio without manual

operations. This function can only be set by the dealer, and you

have to be equipped with the specified earphones.

Before using VOX, you must set VOX gain level. Such setting

enables the radio to identify the voice volume. If the microphone

is too sensitive, the background noise will trigger the radio to

transmit. If the microphone is not sensitive enough, it cannot

receive your voice when you speak. Make sure to adjust the VOX

gain level to proper sensitivity.

4.1.3 Scan Function (this function can be disabled by the dealer)

If the scan function is enabled, you can press the

preprogrammed Scan button to start scanning and press it again to

stop scanning.

Explanations:

● After scan pauses, there are two ways to resume scanning:

1. Time operate: After pausing on an active channel, the radio will

resume scanning after a preprogrammed delay. The scan delay

time can be preset from 0.5 to 5 seconds.

2. Carrier operate: After pausing on an active channel, the radio

will resume scanning after a preprogrammed delay after the

channel becomes inactive. The scan delay time can be preset from

0.5 to 5 seconds.

● The revert channel during scan can be designated through PC

software. There are following options available:

1. Last Rx channel: