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PT4200 

SERVICE MANUAL

                        Chapter 1 Introduction 

1.1 Introduction

This manual applies to the service and maintenance of PT4200 

series of FM mobile radios, and is designed for the engineers and 
professional technicians that have been trained by Kirisun. In this 
manual you can find all the information of product service. Kirisun 
reserves the rights to modify the product structure and specification 
without notice in order to enhance 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. 

Read this manual before repairing the product.

1.2 Service Precautions 

Safety

Avoid skin contacting with the antenna connector and PCB.

Do not reverse the power polarities.

Do not turn on the power before the antenna and load 

connection is completed.

Do not use the radio if the antenna has been damaged. 

Contacting the damaged antenna will cause lightly burning on the 
skin. 

Repairing service can only conducted by professional 

technicians.

Electromagnetism Interference

 

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

places:

Hospital, health center, air port 

Any area with a potentially explosive atmosphere (where the air 

contains gas, dust and smog, etc.), such as the storage or 
transportation facilities.

Any area of dynamite or exploder.

Component Replacement

All the components used in repair service should be supplied by 

Kirisun.

Other components of the same models available on the market 

are not surely able to use in this product and we do not guarantee 
the quality of the product using such components.

Please fill in a component application forms if you want to apply 

for any components from Kirisun. 

The following is one sample form that might be used to apply 

for any components from Kirisun.

Component Application

 

 

PT4200-2      FET

        Q11

RD07MVS1       105-RD07MV-001     1

PT4200-2 

Triode         Q5

2SC5108

Y

  104-SC5108-001       1

PT4200-2 

Belt Clip

KBJ-05

                             1

1.3 Service

All the Kirisun products are subject to the service warranty. 

The main unit of the radio is guaranteed for service of 18 months. In 
one of the following situations, charge free service will not available.

No valid service warranty or original invoice. 

Malfunction caused by disassembling, repairing or 

reconstructing 

the radio by the users without permission.

Wearing and tearing or any man-made sabotage such 

as mechanical damage, burning or water leaking. 

Product serial number has been damaged or the product 

trademark is difficult to identify.

After the warranty expires, lifetime service is still 

available. And we also provide service components to 
service stations.

Chapter 2 Radio Overview and Function Keys

2.1 Radio Overview 

 LED Indicator

Lights red while transmitting; lights green while receiving a 

signal.

Flashes red while in low battery power.

 Channel Selector

Rotate to select channel 1-16.

 Power/Volume Switch

Turn clockwise to switch on the radio. 

Turn counterclockwise till a click is heard to switch off the radio.

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

 PTT (Push-to-talk)

To make a call, press and hold the PTT button, then speak into 

the microphone in normal voice. 

Release the PTT button to receive a call.

 Monitor Button 

Press to disable the SQUELCH, and release to enable the 

SQUELCH again.

 Channel Annunciation Button

Press it in standby state, and the channel number will be 

annunciated. If press and hold this button, and at the same time 
switch on the radio again, the type of voice annunciation of channel 
number will be changed. 

 Emergency Button

Press and hold this button for over 2 seconds to activate 

warning tone. Press it again to exit the emergency alert state. 

Note: When warning tone sounds, all of the buttons are 

disabled. 

 Microphone/Speaker Jacks

For connecting external Microphone/Speaker.

Model    

Component 

No .

Model/
Specifications   

Material 

Serial 

Quantity

No .

Summary of Contents for PT4200

Page 1: ...PT4200 PROFESSIONAL TWO WAY RADIO V060802 SERVICE MANUAL FM PORTABLE RADIO ...

Page 2: ... software Kirisun Electronic Shenzhen Co Ltd owns the copyright of the radio outward structure circuit design Kirisun Electronic Shenzhen Co Ltd owns the copyright of this service manual Publication without authorization is prohibited Kirisun Electronic Shenzhen Co Ltd owns the trademarks KIRISUN CONTENTS Chapter 1 Introduction 1 Chapter 2 Radio Overview and Function Keys 1 Chapter 3 Electrocircui...

Page 3: ...4200 2 FET Q11 RD07MVS1 105 RD07MV 001 1 PT4200 2 Triode Q5 2SC5108 Y 104 SC5108 001 1 PT4200 2 Belt Clip KBJ 05 1 1 3 Service All the Kirisun products are subject to the service warranty The main unit of the radio is guaranteed for service of 18 months In one of the following situations charge free service will not available No valid service warranty or original invoice Malfunction caused by disa...

Page 4: ...quency mixer the 2nd local oscillator IF amplifier limiter phase frequency detector and noise amplifier IC5 inner circuit and X3 49 5MHz compose the 2nd local oscillator The 2nd local oscillation 49 5MHz and the 1st IF signal 49 95MHz are mixed at IC5 to generate the 2nd IF 450MHz After the 2nd IF signal is amplified and its amplitude is limited at IC5 and then filtered at porcelain filter CF1 450...

Page 5: ... power switch of audio processing circuit It supplies power to IC7 only when in transmitting and it is controlled by MCU J2 is the external MIC socket When external MIC is used the inner MIC will cut off automatically but PTT will remain activated 3 3 Frequency Synthesizer Figure 3 8 Frequency Synthesizer The radio adopts PLL Phase Locked Loop frequency synthesizer The frequency synthesizer consis...

Page 6: ...tting local oscillation frequency Accesses the current channel status Controls the LED status indication Controls the power supply of each location Checks the action of each function key Generates CTCSS signals Generates DCS signals DCS decoding Squelch check and control Controls the content of voice indication Memorizer E2PROM AT24C08 Memorizes the radio channel data CTCSS DCS data and other data...

Page 7: ...ting mode 18 CNVSS P18 I Connect 10K resistor with VSS 19 RST P19 I Reset input 20 INT0 P20 I Power check input 21 ENC P21 I Encoding switch selection SEL Connect the pull down resistor with VSS 22 XIN P22 I 7 3MHz Oscillator 23 XOUT P23 O 24 VSS P24 I Earthing Clock frequency shift H Open 25 SHIFT P25 O Final power supply H Open 26 PABC P26 O VCO crystal selection 27 OSCSI P27 I Connect the pull ...

Page 8: ...24 Audio output switch of receiver Cut off when in emergency alert state Q36 2SK1824 Receiver audio output switch Table 3 5 Diode Function Description D1 MA77 Transmitter antenna switch diode D2 MA77 Transmitter antenna switch diode D3 HSC277 VCO output switch D4 HSC277 Antenna switch D5 HSC277 Antenna switch D6 HSC277 VCO output switch D7 HSC277 5V regulated output current stretcher D8 HVC376B VC...

Page 9: ...rt Channel If you press PTT button when the radio is in scanning state the radio will transmit on the revert channel which has 6 types Selected channel The first channel in the scanning list Selected channel current channel If the radio is in the state of scanning pause it will transmit on the current communication channel Otherwise it will transmit on the first channel in the scanning list Priori...

Page 10: ...d a user friendly and convenient Chinese English programming software KSP20 for users to set parameters on the radio The programming steps are as follows a Install the programming software KSP 20 on the computer b Connect the radio to the computer serial port with the specified programming line KSPL02 See Figure 4 1 a Turn on the computer power b Turn on the radio power c Click the KSP20 program t...

Page 11: ... in 4 2 Parameter Setting but the adjustment parameters in 4 3 Computer Test Mode Chapter 5 Service Assemble and Disassemble The radio is a precision communication equipment Please be careful when assemble or disassemble the radio during service 5 1 Removing and Installing the Battery To remove the battery push the latch upwards and remove the battery away from the radio See Figure 5 1 Figure 5 1 ...

Page 12: ... 202 000558 008 203 003208 002 302 17040G 001 202 003208 007 204 003208 005 204 000558 004 204 000558 002 204 000558 005 203 000558 005 201 000558 014 301 25060J 001 301 20040G 001 1 1 1 1 2 2 1 2 1 1 1 2 1 1 1 2 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 21 20 19 18 17 16 EMERGENCY BUTTON COVER EMERGENCY BUTTON LIGHT PIPE SPEAKER SPEAKER WATERPROOF NET MODEL LABLE PTT BUTTON FRAME PTT BUTTON S...

Page 13: ...the Test Mode option to enter the computer test mode c Select the options that you want to adjust and adjust the parameters on the computer d After adjustment exit the computer test mode 6 3 Debugging 6 3 1 VCO Modification Turn off the power saving mode Set the frequency at the low frequency see Table 6 2 In receiving status test the PD power with the digital multimeter Adjust the trimming capaci...

Page 14: ... Test Condition Test Equipment Test Point Adjustment Part Require ment Note Compreh ensive Test Device Before Mixing Computer Test ModePass Band 25MHz smooth wave Shape Not recom mend theuser toadjust it Audio Level Ch RX center frequency RF OUT 53dBm 501 V MOD 1kHz DEV 3 0 kHz Audio Load 16 RF Audio Signal Generator Oscillator Audio Voltmeter Distortion Test Device Comprehe nsive Test Device Spea...

Page 15: ...nge it C The oscillatingtube is broken and please change it Cannot talk to or hear other group members A Make sure the two communication radios are using the channel of the same frequency B Make sure the CTCSS DCS tone is the same as that of your group members C Out of the effective communication range Cannot receive signals A The antenna is not well connected and please screw the antenna again un...

Page 16: ...r 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 Chapter 9 KBC 58L Charger 9 1 Charger Specifications A Idling Input Current 30mA B Charging Terminal Maximum Idling Voltage 8 8V C Constant current charging 200 270mA D Maximum Charging Time 7 hours E Maximum Charging Voltage Limit...

Page 17: ...free Chip FET field effect transistor RD01MUS1 lead free Chip FET field effect transistor RD07MVS1 lead free Carbon film encoder switch RD835E GA1 16C 0F01 18mm BAND HONGHUA Plug in phase frequency detector JTBM455C24 lead free Plug in porcelain filter LTM450HT 450kHz À 3kHz lead free Plug in IF filter 49 95MHz 7 5KHz U 5 2 lead free Chip trimming resistor MVR22HXBRN473 47K 25 B Linear lead free C...

Page 18: ... 001 102 A6278F 001 102 AT2408 001 102 B15E03 001 102 HT7130 001 102 HT7150 001 102 M2902V 001 102 M2904V 001 102 M38034 001 102 MC3361 001 103 00MA77 001 103 0MA360 001 103 1SS372 001 103 A2S111 001 103 DAN222 001 103 HSC277 001 103 HVC350 001 103 HVC376 001 103 HZU5AL 001 103 IN4148 001 103 L190YG 001 103 MHC190 002 104 A144EE 001 104 C144EE 001 104 KRX102 001 Component Name Specification PT558P...

Page 19: ...A1 16C 0F01 18mm BAND Plug in phase frequency detector JTBM455C24 Plug in porcelain filter LTM450HT 450kHz À 3kHz Plug in IF filter 49 95MHz À 7 5KHz U 5 2 Chip resistor 0402 0R À 5 Chip resistor 0402 10R À 5 Chip resistor 0402 100R À 5 Chip resistor 0402 1K À 5 Chip resistor 0402 10K À 5 Chip resistor 0402 100K À 5 Chip resistor 0402 1M À 5 Chip resistor 0402 1 2K À 5 Chip resistor 0402 12K À 5 C...

Page 20: ...603 1 5K À 5 Chip resistor 0603 15K À 5 Chip resistor 0603 150K À 1 Chip resistor 0603 180R À 5 Chip resistor 0603 22R À 5 Chip resistor 0603 2 2K À 5 Chip resistor 0603 220K À 5 Chip resistor 0603 270R À 5 Chip resistor 0603 2 7K À 5 Chip resistor 0603 270K À 5 Chip resistor 0603 33R À 5 Chip resistor 0603 3 3K À 5 Chip resistor 0603 39K À 5 Chip resistor 0603 47R À 5 Chip resistor 0603 470R À 5 ...

Page 21: ... Chip capacitor 0603 1000P À 10 50V X7R Chip capacitor 0603 0 01uF À 10 50V X7R Chip capacitor 0603 0 1uF À 10 50V X7R Chip capacitor 0603 1uF À 10 50V X7R Chip capacitor 0603 12P À 5 50V C0G Chip capacitor 0603 15P À 5 50V C0G Chip capacitor 0603 1500P À 10 50V X7R Chip capacitor 0603 18P À 5 50V C0G Chip capacitor 0603 1800P À 10 50V X7R Chip capacitor 0603 1P À 0 25P 50V C0G Chip capacitor 0603...

Page 22: ...mic core27NH À 5 0603 Chip wire inductor C1608CB 56NJ ceramic core56nH À 5 0603 Chip wire inductor C1608CB 68NJ ceramic core68nH À 5 0603 Chip inductor MLG1608BR10J 100nH À 5 0603 Chip inductor MLF1608A1R0K 1uH À 5 0603 Chip inductor MLG1608B12NJT 12nH À 5 0603 Chip stacked inductor LGHK1608R22J T 220nH À 5 0603 Chip inductor MLG1608B27NJ 27nH À 5 0603 Chip inductor MLF1608A3R3K 3 3uH À 5 0603 Chi...

Page 23: ...sory List Item Battery Hand Strap Earphone Charger Adapter Antenna Accessory Figure Specification 7 4V 1200mAh Li Poly 7 hour standard charger DC OUT 15V 400mA Model KB 42A 8AJD 20K KME 201 KME 202 KBC 58L KTC 58C1 KA 3U064 Short Antenna 21 ...

Page 24: ...22 PT4200 SERVICE MANUAL Figure 1 PT4200 Top Board Position Mark Diagram ...

Page 25: ...23 PT4200 SERVICE MANUAL Figure 2 PT4200 Bottom Board Position Mark Diagram ...

Page 26: ...24 Figur3 PT4200 Schematic Circuit Pane Diagram ...

Page 27: ...8 25 Figur4 PT4200 Schematic Circuit Pane Diagram ...

Page 28: ...KBC 58L Schematic Circuit Diagram Figure 5 KBC 58L Schematic Circuit Diagram 8 26 ...

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