Kirisun PT4208 Service Manual

PT4208 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 power 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 KSP4208 software.

Unauthorized Duplication of KSP4208 software

is strictly prohibited.

Kirisun Electronics (Shenzhen) Co., Ltd owns

the copyright of the MCU software.

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”, “

立讯”.

”, and “科

Contents

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

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

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

Chapter 4 Mode Introduction ...............................................................................................9

Chapter 5 Assembly and Disassembly for Maintenance....................................................11

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

Chapter 7 Specifications..................................................................................................... 16

Chapter 8 Troubleshooting .................................................................................................16

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

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

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

Appendix 3 Structural Parts List ........................................................................................29

Appendix 4 Accessories .....................................................................................................31

Figure 1 PT4208 Block Diagram .......................................................................................32

Figure 2 PT4208 Schematic Circuit Diagram (420-470MHz) ..........................................33

Figure 3 PT4208 Main Board Top Layer Position Mark Diagram (420-470MHz)...........34

Figure 4 PT4208 Main Board Bottom Layer Position Mark Diagram (420-470MHz).....35

Figure 5 PT4208 Main Board Top Layer Position Value Diagram (420-470MHz) ..........36

Figure 6 PT4208 Main Board Bottom Layer Position Value Diagram (420-470MHz) ....37

Figure 7 PT4208 Main Board Top Layer Layout (420-470MHz) .....................................38

Figure 8 PT4208 Main Board Bottom Layer Layout (420-470MHz) ...............................39

Figure 9 PT4208 Schematic Circuit Diagram (136-174MHz) ..........................................40

Figure 10 PT4208 Main Board Top Layer Position Mark Diagram (136-174MHz).........41

Figure 11 PT4208 Main Board Bottom Layer Position Mark Diagram (136-174MHz)...42

Figure 12 PT4208 Main Board Top Layer Position Value Diagram (136-174MHz) ........43

Figure 13 PT4208 Main Board Bottom Layer Position Value Diagram (136-174MHz) ..44

Figure 14 PT4208 Main Board Top Layer Layout (136-174MHz) ...................................45

Figure 15 PT4208 Main Board Bottom Layer Layout (136-174MHz) .............................46

Figure 16 KBC-70C Schematic Circuit Diagram ..............................................................47

Figure 17 KBC-70C Top Layer Position Value Diagram ..................................................48

Figure 18 KBC-70C Top Layer Position Mark Diagram................................................... 49

Figure 19 KBC-70C Bottom Layer Position Value Diagram ............................................50

Figure 20 KBC-70C Bottom Layer Position Mark Diagram .............................................51

Figure 21 KBC-70C Layout ...............................................................................................52

1

PT4208 Service Manual

Chapter 1 Overview

1.1 Introduction

This manual applies to the service and maintenance of

PT4208 series 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

service manual or contact your local dealer or us.

Please read this manual before repairing the product.

1.2 Service Attentions
* Safety

Do not contact the antenna connector or PCB with your

skin directly.

Do not reverse the battery polarity.

It may cause harm to the radio if signal input on the

antenna connector is larger than 20 dBm (100mW).

Do not turn on the radio before the antenna and load

connection is completed.

If the antenna has been damaged, do not use the radio.

Damaged antenna may cause light burning on skin.

* Explosive Atmosphere

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

places:

Hospital, health center, and airport.

Any area with a potentially explosive atmosphere (e.g.

orlop deck of the ship, storage and transportation equipment

for fuel and chemical etc.)

Any place near blasting sites or area with electrical

blasting cap.

* 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.

2

to download the latest

e.g.

Component Application Form

Radio Model Component

PT4208-02 FET Q3 RD01MUS1 105-RD01MU-R01 1

PT4208-02 Triode Q49 2SC5108（Y） 104-SC5108-001 1

Position

Mark

Model/

Specifications

Parts No. Qty

1.3 Service

All the Kirisun products are subject to the service

warranty.

After-sales service will be provided, and the length of

warranty is stated by Kirisun. The radio and its accessories

are all in the warranty. However, in one of the following

cases, charge free service will not be available.

* No valid warranty card or original invoice.

* Malfunction caused by disassembling, repairing or

restructuring the radio by 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

See Figure 1.

Figure 1

2.2 Functional Keys

1. LED Indicator

Lights red while transmitting; lights green while

PT4208 Service Manual

receiving; flashes red while in low battery power.

2. Channel Selector Knob

Rotate the knob to select channel 1-16.

3. On/Off/Volume Control Knob

Rotate clockwise to turn on the radio, and keep turning

to adjust the volume. To turn off the radio, rotate the knob

anticlockwise till a sound of click is produced.

4. PTT (Push-To-Talk) Key

Press the PTT key and talk to the microphone to send the

voice to the recipient.

5. Side Key 2 (Programmable key)

6. Side Key 1 (Programmable key)

7. Top Key (Programmable key)

8. Speaker/Microphone Jack

Jack for connecting external speaker or external

microphone to the radio.

Chapter 3 Circuit Description

3.1 Frequency Configuration

Figure 3.1 Frequency Configuration

The reference frequency of the frequency synthesizer is

provided by crystal oscillator X4 (TCXO, 16.8MHz). The

receiver adopts double mixing. The first IF is 49.95MHz 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 third harmonic

(50.4MHz) of the crystal oscillator X4 (TCXO, 16.8MHz).

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 (D1, D2, D4 and D5), and passes

through a BPF (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 routed to the

low noise amplifier (LNA) consists of Q20 and its peripheral

components where it is amplified.

Output signal from the LNA passes through a BPF (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 diode (D21, D22, D23,

D24, D26 and D30).

First mixer

The receiving signal from LNA is mixed with the first

local oscillator signal from the frequency synthesizer to

produce the first IF signal (49.95MHz). 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 routed to the IF

processing IC (IC5, TA31136).

IF IC consists of the second mixer, second local

oscillator, IF amplifier, limiter, discriminator, and noise

amplifier.

The 16.8MHz frequency produced by TCXO (X4) is

multiple-amplified and then adopts the third harmonic

(50.4MHz) as the second local oscillator signal source. The

second local oscillator signal (50.4MHz) is mixed with the

first IF signal (49.95MHz) in IC5 to generate the second IF

(450kHz). And then the second IF signal is amplified and

limited in IC5, filtered in the ceramic filter (CF1, 450kHz),

and demodulated in IC5. After that, the demodulated signal

is routed to the audio circuit to output audio signal.

3

PT4208 Service Manual

Figure 3.3 IF System

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 signaling 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 routed to Q9 for amplifying. The amplified signal is

adjusted in volume potentiometer and then is routed to the

audio power amplifier (IC8).

operate, and the speaker sounds. Speaker impedance: 16.

Q38: RX audio signal switch

Q51: Warning tone switch

Q25: Alert tone switch

CTCSS signal filtering

Demodulated audio signal from IC5 may contain CTCSS

(Continuous Tone Control Squelch System) or DCS (Digital

Code Squelch) signal. The spectrum components of

CTCSS/DCS are within 67-250Hz. 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 Transceiver (TX)
TX power amplification

Figure 3.5 Principle of Power Amplification and Antenna

Switch

The modulated RF signal from VCO is amplified in Q2,

Q3 and Q12, and is routed 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 3.4 Audio Processing of Receiver

Squelch circuit

The demodulated signal from IC5 goes to the selective

noise amplifier consists of noise amplifier within IC5, C211,

R99, R100, C107 and R94 to remove the noise component.

The resulting signal is then amplified in Q7 and

demodulated in D17 and is routed 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 it is amplified and output

to drive the speaker. The warning tone has no volume

limitation.

When AFCO is in high level, Q35 turns on, IC8 starts to

4

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 output power of Tx can

keep stable under different working conditions.

MCU can set the power through changing the voltage

Figure 3.6 APC Circuit

PT4208 Service Manual

input to IC3B.

Tx voice signal processing

MIC Amp

MIC

Pre-Emphasis

IC7A

CTCSS/DCS

MCU

Figure 3.7 Audio Circuit of Tx

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 routed to VCO for

modulation together with CTCSS/DCS signal.

The AGC circuit is consisting 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

to MCU

DCS Mod

Freq Adj

to MCU VCCN

TCXO

Data
CK

LE

1

N

Control Circuit

1

Nr

Detect

Charge
Pump

UL

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 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

IC7C,IC7D

IC7B

Q5

VCO

MOD in

VCO

TCXO

Q4

D3,D6

TX

RX

provided by X4 (TCXO, 16.8MHz).

The reference frequency from TCXO (Temperature

Controlled 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 the

error signal. The signal is then filtered by a low pass filter

and is routed 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

F

: Oscillation frequency of VCO

VCO

: Reference frequency

R

Unlock detection: When PLL is unlocked, Pin 14 of IC

will output the low level signal to MCU. Then MCU

prohibits the Tx 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. User 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

rebooting 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 polymer 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.

5

PT4208 Service Manual

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 Rx.

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

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

power for frequency synthesizer.

3.7 MCU Unit

to PLL

APC CONTR

IC9

EEPROM

D/A

5TC

5RC
SAVE

chananl

SW

RXD

to PC

UL

LE

DATA

CK

IC10

MCU

TXD

PTT

MONI

VCCN

BEEP

CTCSS/DCS OUT

VIOCE CHIP

TX/RX CONTROL

SHIFT

PF1

ALARM

SQL

BATT

CTCSS/DCS IN

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

2

PROM, A T24C08):

The memory is stored with channel data, CTCSS/DCS

data, other data for function setting, and parameter adjusting

data.

6

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 decoded by

MCU (pin 49). MCU checks if the CTCSS/DCS signal in the

receiving 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

routed to the APC unit to control the output power of the

transmitter.

CTCSS signal

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 has set the

same CTCSS frequency. In doing this, disturbance from

other signals can be avoided.

PT4208 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 routed 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]

DCS signal

No. Frequency

[Hz]

PT4208 Service Manual

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.

PT4208 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 routed 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

Refer to table 3.3 for descriptions of each pin.

Table 3.3 Definition of CPU Pins

No. Port name Pin Name I/O Function

1 TOPKEY P33 I Top key detect

2 UPKEY P34 I Up key detect

3 MODE I Connect the 4.7K resistor with VCC,

programming test point

4 PTT P43 I [PTT] input

5 DNKEY P44 I Down key detect

6 RST I Reset input, programming test point

7 XOUT O Oscillator

8 VSS I GND
9 XIN I Oscillator（7.3MHz）

7

10 VCC I 5V CPU power input
11 SHIFT P54 O Clock beat shift. H：On

12 TO0 P53 O (PWM) BPF tuning output

13 TO1 P52 O (PWM) QT/DQT output

14 VDEVC2 P51 I Deviation switch 2 of VHF

15 VDEVC1 P50 I Deviation switch 1 of VHF

16 NC Connect the pull-down resistor with VSS
17 PABC P26 O Final power supply H：On

18 OSCSI P25 I VCO crystal select and connect the

19 WNTC P24 O Wideband/Narrowband control.

20 ENC0 P23 I Encoder input

21 ENC2 P22 I Encoder input

22 ENC3 P21 I Encoder input

23 ENC1 P20 I Encoder input

24 PS P17 O PLL power-saving control. H: Normal L:

25 NC Connect the pull-down resistor with VSS

26 NC Connect the pull-down resistor with VSS

27 NC P86 Connect the pull-down resistor with VSS

28 SDA P85 I/O E2PROM data line

29 SCL P84 O E2PROM clock line

30 UL P83 I

I (TRFI)

31 T2IN P82 Reserved：2TONE input

32 DT P81 O PLL data output

33 CK P80 O PLL clock output

34 LE P60 O PLL IC enable pin. H: Locked

35 5MC P45 O Power control except CPU and E2PROM

36 INT P66 I Power detect input

37 TXD P67 O RS-232C output, programming test point

38 RXD P65 I RS-232C input, programming test point

39 AFCO P64 O AF amplification power

40 RX P63 O TX/RX VCO select H: Receiving

41 GLED P31 O Green LED control H: On

42 APC P30 O (PWM) TX: Automatic power control output

43 RLED P36 O Red LED control H: On

44 SAVE P32 O O Battery saving control. H：Supply power,

45 MUTE P13 O Mute control. H: MIC mute; L: Audio

46 5RC P12 Receiving power control. L: On
47 5TC O Transmitting power control. H：On

48 NC P10 Speaker mute switch output

49 TI P00 I (A/D8) QT/DQT signal input

50 RSSI I (A/D7) Signal strength detect

51 BUSY P01 I (A/D6) Busy signal input

52 MANDO

WN

53 BATT P03 I (A/D4) Battery voltage detect

54 NC Connect the pull-down resistor with VSS

55 W588C P62 O Voice alert switch. H: Channel No.

56 AC P61 O Alarm switch control. H: Controlled by

57 BUSY_V P05 I Voice alert circuit busy detect

58 VCCN P06 O (D/A0) Frequency stability output

59 AVSS I Connect with VSS

60 DTMF P07 O (D/A1) DTMF Output

61 VREF I Connect with VCC

62 AVCC I Connect with VCC

63 DATA_V P37 O Voice alert data

P02 I (A/D5) Man-down switch detect

pull-down resistor with VSS. H: 13, L:

16.8

H: Wideband L: Narrowband

Power Saving

PLL unlock detect pin

H: Locked L: Unlocked

L：On

H: On

L: Power saving

mute

reporting

Volume Switch

The power level must be low in case of

emergency alarm

PT4208 Service Manual

64 SCLK_V P35 O Voice alert clock

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 oscillator, second IF

IC6 NJM2902 Amplification and filtering of demodulation

IC7 NJM2902 MIC amplification, limitation and filtering

IC8 TDA8541 Audio frequency power amplification of

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 filter

Q7 2SC4738 Noise amplifier

Q9 2SC4617 Audio frequency signal amplification of

Q10 2SC1623 5V voltage regulation output current stretching

Q11 RD07MVS1 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

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

Q36 2SK1824 Receiver audio output switch

Model Function Description

amplification, limitation, demodulation, and
noise amplification

signal of receiver.

receiver

function setting parameters and adjusting
status parameters

receiver

Emergency

Table 3.5 Function Description of Diodes

Position

Mark

D1 MA77 Transmitter antenna switch diode

D2 MA77 Transmitter antenna switch diode

D3 HSC277 VCO output switch

8

Model Function Description

D4 HSC277 Antenna toggle switch

D5 HSC277 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

Receiving indicator

LED

D25 MA2S111 APC single diode

D28 Red LED Transmitting indicator

D29 Green

Receiving indicator

LED

Table 3.6 Features of Crystal Filter XF1, XF2

Item Rated Value

Nominal center frequency 49.95MHz

Passband width ±7.5kHz or higher

40dB stop bandwidth ±20.0kHz or lower

Pulse 1.0dB or lower

Insertion loss 3.0dB or lower

Guarantee attenuation 80dB or higher

Terminal impedance ---

Table 3.7 Features of CF1 LTVPC450EB

Item Rated Value

Nominal center frequency 450kHz

6dB bandwidth ±6kHz or higher

50dB bandwidth ±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 Devices

B

E

B

E

RD01MUS1

GSD

2SC5108

M: MC

KTA1298

2SC3356

M: R24

B

C

E

FMMT591

B

E

RD07MVS1

D

RDA0002

S

G

C

C

S

2SC4617

B

E

DTC144EE

M:16

B

E

HT7150-1

GNDINOUT

2SC4738

B

C

E

DTA144EE

B

C

E

2SK1824

Mark: B1

G

S

KTC4082

B

C

E

2SK308NV

S

CC

D

D

2SC1623

M: L6

B

C

E

3SK318
M: YB-

G1

G

G2

DA221
M: K

1

2

C

S

D

3

PT4208 Service Manual

Chapter 4 Mode Introduction

Mode Introduction

Mode Function How to enter

User Mode For normal use Power ON

Data
Programming
Mode

PC

PC Test Mode

Mode

Firmware
Programming
Mode

Wired Clone Mode

* 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.

* Data Programming Mode

The radio has been set before leaving the factory.

However, due to different requirements of users, the radio’s

operating frequency, channels, CTCSS/DCS, scan, and other

functional parameters should be reprogrammed. Therefore,

Kirisun has specially designed a set of Chinese/English

programming software KSP4208 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 KSP4208 on the computer.
B. Connect the radio to the serial port of the PC with

the special programming cable. Refer to the figure

below.

Computer

(RS232 serial port)

Figure 4.1

C. Turn the computer power ON.
D. Turn the radio power ON.
E. Run the KSP4208 programming software by

double clicking on its executive program.

F. Click “Program” in the main menu of KSP4208,

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

Tune the radio
parameters by PC

Upgrade the radio
when new features are
released

Used to transfer
programming data
from one radio to
another

Programming

cable

Received commands
from PC. See below for
further information.

Received commands
from PC. See below for
further information.

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

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

(Earphone/Program

Radio

ming interface)

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

KSP4208 according to requirements of the user:

Radio Information:

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

Embedded Information, MCU Version, Hardware Version,

etc.

Radio Configuration:

(1) Key Assignment: Side Key 1 (Up Key), Side Key 2

(Down Key), and Top Key can be set as long/short key and

the hold time can be defined.

(2) Miscellaneous

1. Wired Clone Mode

2. TOT (Time Out Timer)

3. TOT Reset

4. TOT Pre-alert

5. TOT Re-key time

6. Squelch Level selection

7. Alert Tone

8. Read Data Password

9. Write Data Password

(3) Scan

Scan Function option, Priority Channel, Revert Channel,

Tx Dwell Time, Dropout Delay Time, Lookback Time.

(4) Emergency settings

Channel Parameters

(1) Rx Frequency and Tx Frequency (Step:

2.5KHz/5KHz/6.25KHz)

(2) Rx Signaling and Tx Signaling

a) None

b) CTCSS (60~260Hz @ 0.1Hz step)

c) DCS (-777~777@octal number)

(3) Busy Channel Lockout (BCL)

(4) Beat Shift

(5) Channel Spacing: 25KHz/12.5KHz (Wide/Narrow)

(6) Scan Add/Delete

(7) Tx Power (High/Low)

(8) Clear Tail Tone

(9) CALL1 and CALL2 encode

(10) PTT ID Keyup Telegram, PTT ID Dekey Telegram

DTMF Setting

DTMF Encoder Template

9

PT4208 Service Manual

DTMF Encoder Sequences (1~12)

Please refer to the “Help” document of KSP4208 for

details.

Note:

1. Please firstly read data of the radio and back up the data

before editing the parameters on KSP4208.

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.

* PC Test Mode

Connect the radio to the serial port of the computer with

the special programming cable. Refer to figure 4.1.

Warning: Before entering the PC Test Mode, please firstly

connect a 50 HF load to the antenna connector of the radio

or connect the radio to a general test set.

With the KSP4208 programming software, you can enter

the Tuning Mode under 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)
(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) Center frequency of DTMF Deviation (Wideband and

Narrowband)

(22) Tx Low Voltage
(23)

Rx Low Voltage

* 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.

* 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 reboot the

radio if he wants the radio to return to the User Mode.

The operation is as follows:

1. Press and hold Side Key 2 for over 2 seconds while

turning the radio power ON to enter the Wired Clone

Mode. The radio will enter User Mode if wired clone

function is disabled.

2. Connect the slave radio to the master radio by the

cloning cable (KCL-01) and turn on the power of the

slave radio.

3. Press Side Key 1 on the master radio to start cloning.

Then the red LED on the master will light. 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 red LED on the master will go

out, and the slave radio will reboot automatically.

10

PT4208 Service Manual

4. The other slaves can be continuously cloned. Carry out

the operation in step 3.

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 Assembly and Disassembly for

Maintenance

The radio is a kind of sophisticated communication

equipment with precise structure and small size. You should

assemble and disassemble it carefully during the

maintenance. The instructions for the assembly and

disassembly are as follows.

5.1 Install/Remove the battery

1) Install the battery

Insert the two protrusions at the lower end of the battery

into the holes at the lower end of the shell of the radio.

Note:

* Never short the terminals of the battery.

* Do not throw the battery into fire.

* Do not remove the housing of the battery by yourself.

5.2 Install/Remove the belt clip

Slide the guide rails on the belt clip along the guide slots

on the rear of the battery with proper strength until the belt

clip is hooked. When removing the belt clip, lift the sheet

metal on the top of the belt clip with your finger nail or a

tool while pushing the belt clip upward.

Press down the upper part of the battery until the latch on

the radio completely bounces out and locked.

2) Remove the battery

Press the back of the battery slightly, and push the latch

upward. Then remove the battery from the radio.

11

5.3 Remove the front cabinet from the chassis

1) Pull out the knobs and screw off the antenna;

2) Remove the two nuts of the knobs and one nut of the

antenna with a special tool;

3) Screw off the screw on the earphone jack cover with a

cross screwdriver, and then remove the rubber cover;

4) Remove the two rubber plugs on the screws of the coping;

screw off the screws by a hexagonal screwdriver, and then

take off the coping;

5) Remove the two fixing screws at the lower part of the Al

chassis by a hexagonal screwdriver;

6) Insert a flat-blade screwdriver into the slot at the bottom

of the Al chassis, and prize up it. Then pull the Al chassis

backward to remove it from the front cabinet. Please be

careful not to break the cable of the speaker.

Refer to Figure 5.5.

PT4208 Service Manual

Figure 5.5

5.4 Remove the main board from the Al chassis

1) Remove the screws from the PCB board by a cross

screwdriver;

2) Remove the solder of the antenna terminal with a

soldering iron. Then take off the main board.

Refer to Figure 5.6

Figure 5.6

After the aforesaid disassembly, you can repair and

adjust the radio according to its actual malfunction.

1

2

3

4

5
6
7
8

9

10

Figure 5.7 Exploded View

No. Part No. Description PCS

1 710-420470-R06 Antenna 1

2 201-004208-R07 Channel Selector Knob 1

3 201-004208-R06 Volume Knob 1

4 203-003208-R09 Circlip 2

11 12 13

17 18 19 20 21 22

36

35

26 32 33 34

25

23 24

27

37

28 29 30 31

14

15

16

5 203-007200-R07 Nut for Antenna Socket 1

6 203-000558-R02 Nut for Knob 2

7 201-004208-R09 Light Guide 1

8 201-004208-R01 Front Cabinet 1

9 201-004208-R08 Earphone Jack Cover 1

10 301-25080J-R01 Screw M2.5*8.0 1

11 202-004208-R01 Main Waterproof 1

12 201-004208-R02 Coping 1

13 301-25050J-R01 Screw M2.5*5.0 2

14 202-007200-R07 Rubber Plug 2

15 203-000558-R05 Spring for Battery Latch 1

16 201-004208-R03 Battery Latch 1

17 204-003208-R02 Dust-proof Net for Speaker 1

18 202-004208-R02 Rubber PTT Key 1

19 201-004208-R04 PTT Key 1

20 121-100000-R20 Speaker 1

21 301-20040G-R01 Screw M2.0*4.0 12

22 602-04208X-HXX Main Board 1

23 201-004208-R05 POGO Pin Socket 1

24 203-004208-R02 Earphone Plate 1

25 203-000558-R07 Antenna Socket 1

26 204-004208-R02 Dust-proof Net for MIC 1

27 202-007200-R06 POGO Pin Waterproof 1

28 203-004208-R01 Al Chassis 1

29 301-20080G-R02 Screw M2.0*8.0 2

30 204-007200-R03 Sponge for POGO Pin 1

31 706-0KB70B-R01 Battery 1

32 202-004208-R03 MIC Rubber Waterproof 1

33 120-100000-007 Plastic-packaged Wire 1

34 120-100000-008 Plastic-packaged Wire 1

202-003208-R07 Heat Exchange Silicone

35

Rubber Washer

1

36 204-006500-R02 MIC Socket Guardian 1

37 204-0KB36L-R03 Sponge Cushion 1

Chapter 6 Adjustment

Before test/adjustment, make sure all equipment has

been well connected to the ground!

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

12

PT4208 Service Manual

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 PT4208.

Table 6.1 Equipment and Software Required for Test and

Adjustment

No. Name Major Specifications

1 Computer

Programming

2

software

Programming

3

cable

4 Clone cable KCL01

DC regulated

5

power supply

6 RF power meter

Frequency

7

counter

8 Deviation meter

9 DMM

Audio signal

10

generator

RF power

11

attenuator

Standard signal

12

generator

13 Oscilloscope

Audio frequency

14

voltmeter

Recommendation: Item 6, 7, 8, 10, 11, and 12 listed in

the table can be replaced by HP8920 general test set.

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

KSP4208

Output voltage:7.5V
Output current: 5A

Measurement range: 0.5-10W
Frequency range: 100MHz-500MHz
Impedance: 50
SWR1.2

Frequency range: 0-1600MHz
Frequency accuracy: better than ±1×10-6
Sensitivity: better than 100mV

Frequency range: DC600MHz
Measurement range: 0-±5kHz

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

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

Attenuation: 40dB or 50dB
Supporting power : higher than10W

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

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

Test range: 10mV-10V

Figure 6.1 External Speaker/MIC Plug

6.2 Adjustment Items

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 KSP4208

programming software (in the Tuning Mode). The adjustable

parameters are as follows:

1) 6250Hz stability/2500Hz stability

2) Tx high power/low power

3) BATT Tx low voltage /Rx low voltage

4) SQL9/SQL1 On/Off

5)

QT DEV

6) DCS DEV

7) DTMF DEV

8) Rx sensitivity

Steps for adjustment:

a. Enter PC Test Mode. Refer to Chapter 4.

b. Click “Edit” in the main menu of KSP4208

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 to the low frequency point (see Table 6.2). Under

the receiving status, measure the voltage of PD by DMM.

Then adjust the PD voltage to be 0.7V±0.3V by tuning the

trimming capacitor C180.

Set the Tx frequency to the high frequency point (see

13

PT4208 Service Manual

Table 6.2), and press the PTT key. Then measure the voltage

of PD by DMM. The resulting voltage should be lower than

4.5V.

Table 6.2 High/Center/Low Frequency Point for PT4208

Low Freq Point Center Freq Point High Freq Point

PT4208(1) 136.125 MHz 145.125 MHz 173.975 MHz

PT4208(2) 400.125MHz 425.125MHz 449.975MHz

PT4208(3) 420.125MHz 445.125MHz 469.975MHz

6.3.2 PLL frequency

In the Tuning Mode, double click the “6250Hz

stability/2500Hz stability” item to enter. Adjust the

parameter within the adjusting range of 0-255 to make the

Tx frequency be the rated value (with error within ±200Hz).

6.3.3 Tx power

In the Tuning Mode, double click the Tx “High power”

item to enter. Adjust the five frequency points of “Lowest”,

“Low”, “Mid”, “High” and “Highest” within the adjusting

range of 0-255 to make the Tx power be higher than 4W.

Meanwhile, observe the operating current, and make sure

that the current is no larger than 1.7A.

In the Tuning Mode, double click the Tx “Low power”

item to enter. Adjust the five frequency points of “Lowest”,

“Low”, “Mid”, “High” and “Highest” within the adjusting

range of 0-255 to make the Tx power be higher than 1W.

See Table 6.5 for detailed parameters.

6.3.4 Tx low voltage/Rx low voltage for BATT

Firstly, adjust the power voltage to be 6.8V. Double click

the “Tx low voltage/Rx low voltage” in the Tuning Mode.

Click “Begin” to let the software test automatically. When

the value changes no more or only changes a little, click

SAVE to exit.

6.3.5 Max. deviation

Input audio signal (100mV, 1000Hz) to the MIC jack of

the radio. Adjust the potentiometer VR2 to make the Max.

deviation be ±4.5kHz.

6.3.6 DCS Tx signal waveform and deviation

In the Tuning Mode, double click the “DCS DEV” item

to enter. Adjust 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 be 0.8kHz. Then click

narrowband, and adjust the five frequency points to make the

deviation be 0.4kHz.

6.3.7 CTCSS deviation

In the Tuning Mode, double click the “QT(67.0) DEV”

item to enter. Click wideband, and adjust the five frequency

points of “Lowest”, “Low”, “Mid”, “High”, and “Highest” to

make the deviation be 0.75kHz. Then click narrowband, and

adjust the value to make the deviation be 0.35kHz.

In the Tuning Mode, double click the “QT(151.4) DEV”

item to enter. The tuning method is the same as that of

“QT(67.0) DEV”.

In the Tuning Mode, double click the “QT(254.1) DEV”

item to enter. The tuning method is the same as that of

“QT(67.0) DEV”.

6.3.8 Rx sensitivity

In the Tuning Mode, double click the “Sensitivity” item

to enter. Adjust the five frequency points of “Lowest”,

“Low”, “Mid”, “High”, and “Highest” within the adjusting

range of 0-255 to make the sensitivity be the highest.

See Table 6.4 for detailed parameters.

6.3.9 Rx squelch

In the Tuning Mode, double click the “SQL9 On” item 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. Click

“Begin”, the programming software will adjust the value

automatically. When the value keeps stable, click “OK”, 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 of the 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 the “SQL9 Off” item

to enter. Click wideband and use the following method to

adjust the five frequency points of “Lowest”, “Low”, “Mid”,

14

PT4208 Service Manual

“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. Click

“Begin”, the programming software will adjust the value

automatically. When the value keeps stable, click “OK”, 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

Table 6.3 VCO

Item Test Condition

Setting

VCO lock

voltage

Item Test Condition

Audio level

Sensitivity

SQL On

sensitivity

Item Test condition Test equipment

Tx

frequency

DCS

waveform

(balance)

BATT terminal

voltage: 7.5V

CH: Rx low freq

point

CH: Tx high freq

point

Test freq: Mid freq

point

Antenna input:

RF OUT: -53dBm

(501V)

MOD: 1kHz

DEV: ±3.0kHz

Audio load: 16
CH: Mid freq point
CH: Low freq point

CH: High freq point

RF OUT: -119dBm

(0.25V)

MOD: 1kHz

DEV: ±3.0kHz

CH: Rx center freq

point

Level 9

RF OUT: -116dBm

Level 1

RF OUT: -123dBm

Tes t

Equipment

DMM PD

Equipment

RF signal
generator

Oscilloscope

frequency
voltmeter

Distortion

/General test

Measurement

Ter min al

Table 6.4 Receiver Section

Tes t

Audio

meter

set

Frequency counter

/ General test set

Oscilloscope /

General test set

Measure

ment

Ter min al

Speaker

connector

Table 6.5 Transmitter Section

adjust the five frequency points of the 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 the “SQL1 On” and

“SQL1 Off” item 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.

6.4 Adjustment Description

See Table 6.3, 6.4, and 6.5.

Adjustment

Parts

C180 0.7V±0.3V Adjustment

Adjustment

Parts

PC Tuning

Mode

PC Tuning

Mode

Measuring

terminal

Antenna

Requirement Remark

Lower than

4.5V

Requirement Remark

(Turn the
volume knob
clockwise to

the end) Audio

power ＞

0.3W

SINAD: 12dB

or higher

Normal

squelch on

after

adjustment

Normal

squelch on

after

adjustment

Adjustment

parts

PC Tuning

Mode

VR1

Requirement Remark

Within ±200Hz

similar to square

Observation

Internal speaker

power ＞ 1.2W

Smooth and

wave

15

PT4208 Service Manual

Power Power: 7.5V

Max

modulation

deviation

Modulation

sensitivity

CTCSS

DEV

CH：Tx center freq point

AG：1kHz/220mV

CH：Tx center freq point

AG：1kHz/22mV

CTCSS：67Hz

DCS DEV DCS：023N

Low

battery

Battery terminal: 6.8V

Chapter 7 Specifications

Technical Parameters

7.1 General Specifications

Frequency

Number of Channels 16

Channel Spacing W:25 kHz /N:12.5kHz

Operating Temperature -25℃~ +55℃

Antenna Impedance 50

Frequency Stability ±2.5ppm

Battery (Standard

Configuration)

Dimension (W×H×D) 54mm × 119mm × 34mm

Weight 157g (Radio only);

7.2 Receiver

Sensitivity (12dB

SINAD)

Adjacent Channel

Selectivity

Intermodulation

Interference

Audio Output Power 1W (16)

Audio Distortion  5%

7.3 Transmitter

Transmitting Power 4W(UHF) / 5W(VHF)

Modulation Mode W:16KF3E / N:11KF3E

Clutter and Harmonic -36 dBm

Residual FM
（300~3000Hz）

PT4208

(136 ~ 174) MHz (400 ~ 450) MHz

(350 ~ 390) MHz (420 ~ 470) MHz

Lithium Polymer Battery: 1700mAH 7.4V

 255g: with antenna and 1700mAh Lithium

Polymer Battery

 330g: with antenna and 1350mAh Ni-MH

Battery

0.25V(W) / 0.28V(N)

W:  70dB / N: 60dB

 65dB

W:-45 dB / N:-40dB

Power meter/

General test set

Ammeter

Deviation meter/

General test set

Deviation meter/

General test set

Deviation meter/

General test set

PC Tuning

Mode

VR2

Adjust to 4W

Adjust to

±4.5kHz

Within
±0.2W

±200Hz

Deviation

checked should

be

2.2kHz~3.6kHz

PC Tuning

Mode

PC Tuning

Mode

PC Tuning

Mode

Audio Distortion
（300~3000Hz）

Adjacent Channel

Power

Max. Deviation W:＜±5kHz / N:＜±2.5kHz

Adjust to

±0.75kHz

Adjust to

±0.75kHz

Indicator flashes

after adjustment

 5%

W: 70dB / N: 60dB

±50Hz

±50Hz

Chapter 8 Troubleshooting

No. Problem Causes and Solutions

1 Power on

Failure

2 PLL

unlocked

(Beeping)

3 No talkback A. The frequency of the radio’s current channel is not

4 No receiving

signal

A. Unreliable connection between the battery and the

radio, please reinstall the battery.

B. The fuse of the power supply is burnt out. Please

change it.

C. Power switch in failure, please change it.

D. The battery is out of power. Please charge it or

change a new one.

E. The CPU is broken, please change the IC.

A. Channel frequency goes beyond the limit, please

reset the channel data.

B. The PLL crystal oscillator X4 is broken. Please change

it.

C. The oscillator transistor is broken. Please change

it.

D. The PLL IC1 is broken. Please change it.

the same with that of the other radio. Please

reselect a channel.

B. The CTCSS/DCS is not the same. Please reset it.

C. The radio is out of the effective communication

range.

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

antenna until secure.

B. The high-frequency amplifying tube Q20 is

broken. Please change it.

C. The squelch level is too high and the squelch cannot be

opened. Please reset the squelch level.

D. The mixing tube Q19 is broken. Please change it.

16

PT4208 Service Manual

E. The FM processing chip IC5 is broken. Please

change it.

5 The

transmitting red

light is on, but

no voice is

heard by the

recipient.

6 The receiving

green light is

on, but no voice

is heard.

A. Power module Q11 is broken, so there is no power

output, please change the module.

B. The microphone is broken, please change it.

A. The speaker is broken. Please change it.

B. The audio power amplifier IC8 is broken. Please

change it.

Chapter 9 KBC-70C Charger

9.1 General

Function: Intelligent rapid charging

Applicable battery: KB-70B (1700mAH, 7.4V Li-ion battery)

/ KB-70A (1350mAH, 7.2V Ni-MH Battery)

Identification for battery type: External

Input power: DC12V, 500mA, ripple < 500mV

9.2 Operating Environment

Temperature: -5℃ ± 2℃ ~ +55℃ ± 2℃

Humidity: 95%@40℃

9.3 Safety Requirement

Comply with CCC, CE, UL and other safety

requirements.

9.4 Specifications

* Idling input current:  15mA

* Charging terminal maximum idling voltage: 96% ~ 97% of

the input voltage

* Rapid charging current: 410 ± 25mA

* Max. charging time of Ni-MH battery: 285 minutes ± 15

minutes

* Max. charging time of Li-ion battery: 510 minutes ± 30

minutes

* Max. charging voltage: 9.6V ± 0.2V

* Highest battery temperature: +50℃ ± 2℃

* Specified voltage for charged battery:

Ni-MH battery: Pre-charge when the voltage is lower than

5.5 ± 0.1V. When the battery voltage reaches 6.5 ± 0.1V, the
17

charging turns to rapid charging. Or pre-charge when the

voltage is lower than 8.3V ± 0.1V. When the battery voltage

reaches 9.6V ± 0.2V, the battery will be deemed as full and

the charging will stop.

Li-ion battery: Pre-charge when the voltage is lower than

6.5 ± 0.1V. When the voltage reaches 6.5 ± 0.1V, the

charging turns to rapid charging.

* During the charging process, battery voltage, battery

temperature rise, - V△ , charging time, max. battery

temperature will be checked.

* Min. battery voltage:

Ni-MH battery: 5.5V ± 0.1V

Li-ion battery: 6.5V ± 0.1V

* Pre-charge current for battery:

Ni-MH battery: 180mA ± 10mA

Li-ion battery: 90mA ± 10mA

* Pre-charge time: 15 ~ 20 minutes

* Check the battery voltage during the pre-charging process,

when the voltage reaches the threshold of the battery, the

charging will turn to rapid charging.

* Conditions for stopping charging:

Normal conditions: The battery is fully charged. Ni-MH

battery: - V△ = 30mV ~ 60mV

Abnormal conditions:

(1) The battery temperature is higher than the limit.

(2) The battery voltage is higher than the limit.

(3) The charging time exceeds the limit.

(4) In the pre-charging process, the battery voltage fails to

reach the min. voltage allowed for normal battery.

* Status of the charger after the charging is finished: Ni-MH

battery enters trickle charging status (current: 30mA ±

10mA).

* Charging efficiency:

After being charged under normal temperature, the

battery capacity should not be lower than 90% of its actual

capacity.

After being charged under high temperature, the battery

capacity should not be lower than 70% of its actual capacity.

After being charged under low temperature, the battery

capacity should not be lower than 80% of its actual capacity.

* Other functions:

1. Charging indication

2. Abnormal charging indication

3. Pre-charging function for over-discharged battery

4. Trickle charging function for Ni-MH battery

PT4208 Service Manual

5. Output short circuit protection function (the current for

short circuit is lower than 10mA)

9.5 LED Status Table

Charger Status LED Status

Charging

Standby/Unconnect

ed with Battery

Pre-charge Flash / /

Rapid charge Light / /

Charging completed / Light (Ni-MH) /

Charger output

short circuit

Abnormal

charging status

Indicator

(red)

/ Light /

/ / /

/ / Light

Power

Indicator

(green)

9.6 Descriptions

Face the charger, from left to right:

Red LED: Charging indication

Green LED: Power indication or charging completion

indication

Yellow LED: Abnormal charging indication

BAT-: Charging output cathode

DECT: Battery type detection

Suspended: Ni-MH battery

Grounded: Li-ion battery

TEMP: Battery temperature detection. In the battery pack,

there is a thermosensitive resistor (model: NTC103J)

between the output terminal and the ground to detect the

battery temperature.

BAT+: Charging output anode

Indicator for

abnormal battery

temperature

(yellow)

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

2

E

PROM: 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 Controlled Crystal Oscillators

TX: Transmitter

UL: Un-lock

VCO: Voltage Control Oscillator

Appendix 2 Electronic Parts List

Electronic Parts List (420-470MHz)

No. Part No. Description Unit Qty. Position Mark

1 101-04208U-R04 PT4208PCB, FR-4, 1.2mm, PT4208U-081224, ROHS pcs 1

2 102-0R8C2A-R01 MCU / R8C/2A, R5F212A8SNFP, PLQP-64, ROHS pcs 1 IC10

3 102-9140NR-R01 Reset IC / PST9140NR, ROHS pcs 1 IC11

4 102-A31136-R01 IF(MF) modulation IC / TA31136FN, SSOP, ROHS pcs 1 IC5

5 102-AT2408-R01 Memory IC / AT24C08BN-SH, ROHS pcs 1 IC9

6 102-B15E03-R01 PLL IC / MB15E03SL, PLL,16-PIN, SSOP, ROHS pcs 1 IC1

7 102-DA8541-R01 AUDIO, AMP / TDA8541, SO8, ROHS pcs 1 IC8

8 102-HT7130-R01 Voltage regulator IC / HT7130-1, SOT-89, ROHS pcs 1 IC14

9 102-HT7150-R01 Voltage regulator IC / HT7150-1, ROHS pcs 1 IC12

10 102-M2902V-R01 Operational amplifier/ NJM2902V, OP-AMP, ROHS pcs 3 IC4, IC6, IC7

18

PT4208 Service Manual

11 102-M2904V-R01 Operational amplifier/ NJM2904V, OP-AMP, ROHS pcs 1 IC3

12 103-00MA77-R01 Chip switch diode / MA77, 0805, ROHS pcs 1 D1

13 103-0MA360-R01 Chip variable capacitor diode/ 0805,

MA360(PANASONIC), ROHS

14 103-0MA742-R01 Chip switch diode / MA742(PANASONIC), ROHS pcs 1 D17

15 103-1SR154-R01 Chip diode, / 1SR154-400(ROHM), ROHS pcs 1 D33

16 103-1SS372-R01 Chip switch diode / 1SS372(TOSHIBA), ROHS pcs 1 D13

17 103-1SV325-R01 Chip variable capacitor diode / 1SV325, ROHS pcs 4 D8, D9, D10, D11

18 103-A2S111-R01 Chip switch diode / 0603,

MA2S111(PANASONIC), ROHS

19 103-DAN222-R01 Chip switch diode / DAN222, (ROHM), ROHS pcs 1 D308

20 103-HSC277-R01 Chip diode / Waveband switch, HSC277(HITACHI),

ROHS

21 103-HVC350-R01 Chip variable capacitor diode / 0603,

HVC350B(HITACHI), ROHS

22 103-HZU5AL-R01 Chip Voltage regulator diode / HZU5ALL(HITACHI),

ROHS

23 103-L190YG-R01 Chip LED / 0603, green, H19-213SYGC,ROHS pcs 2 D20, D29

24 103-MHC190-R02 Chip LED / 0603,red,19-21SURC/S530-A2/TR8,

ROHS

25 104-A144EE-R01 Chip triode / DTA144EE(ROHM),ROHS pcs 3 Q17, Q34, Q40

26 104-C144EE-R01 Chip triode / DTC144EE(ROHM),ROHS pcs 11 Q8, Q22, Q23, Q26, Q27, Q35, Q39, Q42, Q44, Q52, Q101

27 104-C144EU-R01 Chip triode / DTC144EUA(ROHM),ROHS pcs 1 Q18

28 104-KRX102-R01 Chip triode / KRX102U,with,bias,resistor,ROHS pcs 1 IC2

29 104-MT717T-R01 Chip triode / FMMT717TA,ROHS pcs 1 Q30

30 104-SA1586-R01 Chip triode / 2SA1586,ROHS pcs 1 Q43

31 104-SC1623-R01 Chip triode / 2SC1623,ROHS pcs 1 Q10

32 104-SC3356-R01 Chip triode / 2SC3356,R24,ROHS pcs 1 Q3

33 104-SC4617-R01 Chip triode / 2SC4617(S)(ROHM),ROHS pcs 4 Q6, Q7, Q9, Q37

34 104-SC4919-R01 Chip triode / 2SC4919, MUTING,

CIRCUIT(SANYO), ROHS

35 104-SC5108-R01 Chip triode / 2SC5108Y(TOSHIBA), ROHS pcs 3 Q2, Q4, Q5

36 104-TA1298-R01 Chip triode / KTA1298(Y),ROHS pcs 3 Q29, Q31, Q32

37 104-TC4082-R01 Chip triode / KTC4082,(KEC),ROHS pcs 2 Q1, Q21

38 105-2SJ243-R01 Chip FET(field-effect transistor) / 2SJ243,ROHS pcs 1 Q16

39 105-2SK508-R01 Chip FET(field-effect transistor) / 2SK508NV(K52),

ROHS

40 105-3SK318-R01 Chip FET(field-effect transistor) / 3SK318,ROHS pcs 2 Q19, Q20

41 105-RD01MU-R01 Chip FET(field-effect transistor) / RD01MUS2,ROHS pcs 1 Q12

42 105-SK1588-R01 Chip FET(field-effect transistor) / 2SK1588(NEC),

ROHS

43 105-SK1824-R01 Chip FET(field-effect transistor) / 2SK1824,ROHS pcs 7 Q13, Q25, Q33, Q36, Q38, Q41, Q51

44 105-SK3476-R01 Chip FET(field-effect transistor) / 2SK3476,ROHS pcs 1 Q11

45 106-0BA010-R01 Knob switch / SKHLLBA010,ROHS pcs 1 K1

46 106-454548-R01 Touch switch / 4.5*4.5*4.8,ROHS pcs 2 K2, K4

47 106-ED0873-R01 3208/558 Carbon encoder switch /

ED0873-16-16HC-F18(9), BAND, ROHS

48 106-LBE010-R01 Chip touch switch / SKRTLBE010,ROHS pcs 1 K3

49 108-450C24-R02 Chip phase frequency detector/ JTBM450CX24,

ROHS

50 108-CF450G-R02 Chip porcelain filter/ LTWC450G, 450kHz±5kHz,

ROHS

51 108-XF4995-R01 Chip IF filter / 49.95MHz±7.5KHz,U-5*2,ROHS pair 2 XF1, XF2

52 109-040000-R01 Chip resistor / 0402,0R±5%,ROHS pcs 13 C67, C166, C250, R7, R24, R141, R182, R183, R217, R241, R260, R261, R278

53 109-040100-R01 Chip resistor / 0402,10R±5%,ROHS pcs 7 R95, R96, R98, R101, R127, R200, R283

54 109-040101-R01 Chip resistor / 0402,100R±5%,ROHS pcs 8 R58, R4, R12, R89, R90, R128, R180, R240

55 109-040102-R01 Chip resistor / 0402,1K±5%,ROHS pcs 24 R97, R37, R38, R41, R42, R47, R48, R49, R50, R69, R129, R130, R131, R150,

56 109-040103-R01 Chip resistor / 0402,10K±5%,ROHS pcs 25 R29, R92, R100, R109, R110, R117, R119, R120, R121, R122, R123, R133, R136,

57 109-040104-R01 Chip resistor / 0402,100K±5%,ROHS pcs 26 C170, R279, R6, R43, R79, R80, R84, R102, R103, R104, R107, R113, R115,

19

pcs 1 D12

pcs 3 D15, D16, D25

pcs 5 D3, D4, D5, D6, D7

pcs 6 D21, D22, D23, D24, D26, D30

pcs 1 D14

pcs 1 D28

pcs 1 Q24

pcs 2 Q14, Q15

pcs 1 Q102

pcs 1 SW2

pcs 1 CD1

pcs 1 CF1

R152, R157, R191, R199, R226, R234, R256, R262, R280, R281

R137, R138, R139, R140, R194, R203, R228, R254, R264, R266, R268, R275

R116, R154, R158, R174, R197, R235, R236, R243, R247, R249, R257, R272,

PT4208 Service Manual

R297

58 109-040105-R01 Chip resistor / 0402,1M±5%,ROHS pcs 2 R160, R162

59 109-040111-R01 Chip resistor / 0402,110R±5%,ROHS pcs 1 R91

60 109-040122-R01 Chip resistor / 0402,1.2K±5%,ROHS pcs 2 C276, R188

61 109-040123-R01 Chip resistor / 0402,12K±5%,ROHS pcs 2 R211, R301

62 109-040124-R01 Chip resistor / 0402,120K±5%,ROHS pcs 4 R5, R8, R9, R17

63 109-040151-R01 Chip resistor / 0402,150R±5%,ROHS pcs 1 R179

64 109-040152-R01 Chip resistor / 0402,1.5K±5%,ROHS pcs 1 R54

65 109-040153-R01 Chip resistor / 0402,15K±5%,ROHS pcs 10 C187, C188, C189, C265, R28, R76, R142, R155, R156, R192

66 109-040154-R01 Chip resistor / 0402,150K±5%,ROHS pcs 2 R94, R201

67 109-040181-R01 Chip resistor / 0402,180R±5%,ROHS pcs 3 R70, R71, R189

68 109-040182-R01 Chip resistor / 0402,1.8K±5%,ROHS pcs 1 R224

69 109-040183-R01 Chip resistor / 0402,18K±5%,ROHS pcs 5 R149, R210, R218, R219, R27

70 109-040184-R01 Chip resistor / 0402,180K±1%,ROHS pcs 3 R66, R67, R86

71 109-040220-R01 Chip resistor / 0402,22R±5%,ROHS pcs 3 R73, R93, R274

72 109-040221-R01 Chip resistor / 0402,220R±5%,ROHS pcs 3 R214, R215, R216

73 109-040222-R01 Chip resistor / 0402,2.2K±5%,ROHS pcs 4 R2, R185, R186, R187

74 109-040223-R01 Chip resistor / 0402,22K±5%,ROHS pcs 3 R106, R198, R209

75 109-040224-R01 Chip resistor / 0402,220K±5%,ROHS pcs 4 R87, R164, R233, R246

76 109-040271-R01 Chip resistor / 0402,270R±5%,ROHS pcs 1 R35

77 109-040272-R01 Chip resistor / 0402,2.7K±5%,ROHS pcs 5 R40, R124, R148, R223, R363

78 109-040273-R01 Chip resistor / 0402,27K±5%,ROHS pcs 4 R99, R171, R172, R193

79 109-040274-R01 Chip resistor / 0402,270K±5%,ROHS pcs 1 R231

80 109-040330-R01 Chip resistor / 0402,33R±5%,ROHS pcs 1 R72

81 109-040332-R01 Chip resistor / 0402,3.3K±5%,ROHS pcs 8 R26, R55, R56, R57, R59, R60, R111, R238

82 109-040333-R01 Chip resistor / 0402,33K±5%,ROHS pcs 9 R114, R153, R161, R196, R206, R258, R263, R265, R375

83 109-040334-R01 Chip resistor / 0402,330K±5%,ROHS pcs 3 R15, R82, R105

84 109-040392-R01 Chip resistor / 0402,3.9K±5%,ROHS pcs 3 R39, R221, R222

85 109-040393-R01 Chip resistor / 0402,39K±5%,ROHS pcs 2 R53, R68

86 109-040394-R01 Chip resistor / 0402,390K±5%,ROHS pcs 1 R165

87 109-040470-R01 Chip resistor / 0402,47R±5%,ROHS pcs 2 R31, R32

88 109-040471-R01 Chip resistor / 0402,470R±5%,ROHS pcs 2 R3, R81

89 109-040472-R01 Chip resistor / 0402,4.7K±5%,ROHS pcs 9 R52, R208, R118, R125, R151, R159, R204, R205, R282

90 109-040473-R01 Chip resistor / 0402,47K±5%,ROHS pcs 14 R10, R11, R13, R14, R19, R20, R21, R22, R25, R46, R75, R273, R277, R292

91 109-040474-R01 Chip resistor / 0402,470K±5%,ROHS pcs 3 R166, R232, R374

92 109-040511-R01 Chip resistor / 0402,510R±5%,ROHS pcs 1 R18

93 109-040561-R01 Chip resistor / 0402,560R±5%,ROHS pcs 2 R202, R244

94 109-040562-R01 Chip resistor / 0402,5.6K±5%,ROHS pcs 11 R30, R44, R61, R62, R63, R64, R65, R132, R184, R195, R302

95 109-040563-R01 Chip resistor / 0402,56K±5%,ROHS pcs 9 R16, R173, R175, R176, R177, R178, R239, R248, R376

96 109-040564-R01 Chip resistor / 0402,560K±5%,ROHS pcs 1 R163

97 109-040682-R01 Chip resistor / 0402,6.8K±5%,ROHS pcs 2 R212, R220

98 109-040683-R01 Chip resistor / 0402,68K±5%,ROHS pcs 2 R190, R245

99 109-040684-R01 Chip resistor / 0402,680K±5%,ROHS pcs 1 R77

100 109-040753-R01 Chip resistor / 0402,75K±5%,ROHS pcs 1 R78

101 109-040821-R01 Chip resistor / 0402,820R±5%,ROHS pcs 1 R33

102 109-040822-R01 Chip resistor / 0402,8.2K±5%,ROHS pcs 3 R36, R229, R230

103 109-040823-R01 Chip resistor / 0402,82K±5%,ROHS pcs 4 R51, R255, R271, R300

104 109-040913-R01 Chip resistor / 0402,91K±5%,ROHS pcs 1 R213

105 109-060000-R01 Chip resistor / 0603,0R±5%,ROHS pcs 5 L16, L23, L34, L62, R23

106 109-060100-R01 Chip resistor / 0603,10R±5%,ROHS pcs 1 L21

107 109-060101-R01 Chip resistor / 0603,100R±5%,ROHS pcs 2 R74, R88

108 109-060154-R02 Chip resistor / 0603,150K±1%,ROHS pcs 6 R143, R144, R145, R146, R147, R170

109 109-060220-R01 Chip resistor / 0603,22R±5%,ROHS pcs 1 L54

110 109-060271-R01 Chip resistor / 0603,270R±5%,ROHS pcs 1 R34

111 109-100R47-R01 Chip resistor / 1206,0.47R±5%,ROHS pcs 3 R167, R168, R169

112 110-110223-R01 Chip trimming resistor / MVR22HXBRN223,

22K±25%, B Linear, ROHS

113 110-110683-R01 Chip trimming resistor / MVR22HXBRN683,

68K±25%, B Linear, ROHS

114 110-220103-R03 Volume switch / RY-6932，ROHS pcs 1 SW1

115 111-030000-R01 Chip self resume safety / 433003,3A/32V, 1206 pcs 1 F1

pcs 1 VR2

pcs 1 VR1

20

PT4208 Service Manual

(former 429003)，ROHS

116 112-043100-R01 Chip capacitor / 0402, 10P±0.5P,50V,C0G,ROHS pcs 5 C142, C195, C257, C282, C288

117 112-043101-R01 Chip capacitor / 0402,100P±5%,50V,C0G,ROHS pcs 1 C196

118 112-043102-R01 Chip capacitor / 0402,1000P±10%,50V,X7R,ROHS pcs 33 C1, C38, C72, C73, C74, C75, C96, C97, C98, C99, C100, C103, C104, C105,

C106, C107, C109, C111, C112, C114, C123, C150, C151, C169, C172, C184,

C241, C263, C264, C272, C278, C279, C294

119 112-043103-R01 Chip capacitor / 0402,0.01uF±10%,50V,X7R,ROHS pcs 15 C50, C79, C138, C149, C153, C155, C159, C160, C161, C162, C190, C226, C232,

C253, C296

120 112-043104-R02 Chip capacitor / 0402,0.1uF±10%,10V,X5R,ROHS pcs 20 C35, C82, C83, C85, C101, C167, C168, C173, C174, C175, C176, C177, C178,

C221, C231, C233, C254, C271, C307, C310

121 112-043105-R01 Chip capacitor / 0402,1uF±10%,6.3V,X5R,ROHS pcs 11 C170A, C25, C30, C225, C235, C248, C251, C261, C300, C303, C400

122 112-043122-R01 Chip capacitor / 0402,1200P±10%,50V,X7R,ROHS pcs 1 C211

123 112-043123-R01 Chip capacitor / 0402,0.012uF±10%, 50V, X7R,

ROHS

124 112-043150-R01 Chip capacitor / 0402,15P±5%,50V,C0G,ROHS pcs 2 C69, C86

125 112-043152-R01 Chip capacitor / 0402,1500P±10%,50V,X7R,ROHS pcs 1 C289

126 112-043153-R01 Chip capacitor / 0402, 0.015uF±10%, 50V, X7R,

ROHS

127 112-043180-R01 Chip capacitor / 0402,18P±5%,50V,C0G,ROHS pcs 1 C212

128 112-043182-R01 Chip capacitor / 0402,1800P±10%,50V,X7R,ROHS pcs 2 C51, C113

129 112-0431R0-R01 Chip capacitor / 0402,1P±0.25P,50V,C0G,ROHS pcs 2 C217, C218

130 112-043200-R01 Chip capacitor / 0402,20P±5%,50V,C0G,ROHS pcs 2 C141, C200

131 112-043220-R01 Chip capacitor / 0402,22P±5%,50V,C0G,ROHS pcs 3 C143, C255, C256

132 112-043221-R01 Chip capacitor / 0402,220P±5%,50V,C0G,ROHS pcs 1 C295

133 112-043222-R01 Chip capacitor / 0402,2200P±10%,50V,X7R,ROHS pcs 1 C262

134 112-043223-R01 Chip capacitor / 0402, 0.022uF±10%, 50V, X7R,

ROHS

135 112-043224-R02 Chip capacitor / 0402,0.22uF±10%,10V,X7R,ROHS pcs 1 C280

136 112-043270-R01 Chip capacitor / 0402,27P±5%,50V,C0G,ROHS pcs 1 C224

137 112-0432R0-R01 Chip capacitor / 0402,2P±0.25P,50V,C0G,ROHS pcs 3 C89, C110, C132

138 112-043330-R01 Chip capacitor / 0402,33P±5%,50V,C0G,ROHS pcs 3 C119, C171, C227

139 112-043333-R01 Chip capacitor / 0402, 0.033uF±10%, 16V, X7R,

ROHS

140 112-043392-R01 Chip capacitor / 0402,3900P±10%,50V,X7R,ROHS pcs 3 C222, C238, C284

141 112-043393-R01 Chip capacitor / 0402, 0.039uF±10%, 50V, X7R,

ROHS

142 112-0433R0-R01 Chip capacitor / 0402,3P±0.25P,50V,C0G,ROHS pcs 4 C70, C90, C131, C230

143 112-043470-R01 Chip capacitor / 0402,47P±5%,50V,C0G,ROHS pcs 2 C4, C293

144 112-043471-R01 Chip capacitor / 0402,470P±10%,50V,X7R,ROHS pcs 70 C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21,

145 112-043472-R01 Chip capacitor / 0402,4700P±10%,25V,X7R,ROHS pcs 1 C285

146 112-043473-R01 Chip capacitor / 0402,0.047uF±10%,16V,X7R, ROHS pcs 1 C301

147 112-043474-R01 Chip capacitor / 0402,0.47uF±10%,10V,X5R,ROHS pcs 2 C80, C192

148 112-0434R0-R01 Chip capacitor / 0402,4P±0.25P,50V,C0G,ROHS pcs 1 C182

149 112-0435R0-R01 Chip capacitor / 0402,5P±0.25P,50V,C0G,ROHS pcs 5 C87, C118, C122, C145, C228

150 112-043681-R01 Chip capacitor / 0402,680P±10%,16V,X7R,ROHS pcs 3 C57, C258, C260

151 112-043683-R01 Chip capacitor / 0402, 0.068uF±10%, 16V, X7R,

ROHS

152 112-043820-R01 Chip capacitor / 0402,82P±5%,50V,C0G,ROHS pcs 1 C214

153 112-0438R0-R01 Chip capacitor / 0402,8P±0.5P,50V,C0G,ROHS pcs 4 C32, C47, C124, C128

154 112-0439R0-R01 Chip capacitor / 0402,9P±0.5P,50V,C0G,ROHS pcs 2 C126, C127

155 112-043R50-R01 Chip capacitor / 0402,0.5P±0.1P,50V,C0G,ROHS pcs 2 C147, C219

156 112-043R75-R01 Chip capacitor / 0402,0.75P±0.1P,50V,C0G,ROHS pcs 1 C216

157 112-063101-R01 Chip capacitor / 0603,100P±5%,50V,C0G,ROHS pcs 1 C93

158 112-063102-R01 Chip capacitor / 0603,1000P±10%,50V,X7R,ROHS pcs 1 C95

159 112-063105-R01 Chip capacitor / 0603,1uF±10%,50V,X7R,ROHS pcs 1 C209

160 112-063120-R01 Chip capacitor / 0603,12P±5%,50V,C0G,ROHS pcs 1 C133

161 112-063180-R01 Chip capacitor / 0603,18P±5%,50V,C0G,ROHS pcs 3 C94, C91, C78

162 112-0631R0-R01 Chip capacitor / 0603,1P±0.25P,50V,C0G,ROHS pcs 2 C148, C236

21

pcs 7 C156, C157, C158, C215, C239, C249, C275

pcs 1 C244

pcs 8 C179, C185, C245, C317, C318, C357, C358, C386

pcs 3 C213, C223, C283

pcs 2 C252, C299

C22, C24, C26, C28, C29, C31, C34, C36, C37, C39, C40, C41, C42, C43, C44,

C45, C48, C49, C52, C53, C54, C55, C56, C58, C59, C60, C61, C71, C84, C102,

C108, C125, C152, C154, C163, C183, C186, C220, C237, C267, C268, C269,

C270, C274, C277, C286, C287, C290, C291, C297, C305, C315, C316, C502

pcs 4 C242, C243, C247, C259

PT4208 Service Manual

163 112-0632R0-R01 Chip capacitor / 0603,2P±0.25P,50V,C0G,ROHS pcs 1 C3

164 112-0632R5-R01 Chip capacitor / 0603, 2.4P/2.5P±0.1P, 50V, C0G,

ROHS

165 112-063334-R01 Chip capacitor / 0603,0.33uF±10%,50V,X7R,ROHS pcs 1 C204

166 112-0633R0-R01 Chip capacitor / 0603,3P±0.25P,50V,C0G,ROHS pcs 1 C137

167 112-0633R5-R01 Chip capacitor / 0603,3.5P±0.25P,50V,C0G,ROHS pcs 2 C63, C88

168 112-063471-R01 Chip capacitor / 0603,470P±10%,50V,X7R,ROHS pcs 2 C5, C27

169 112-0634R0-R01 Chip capacitor / 0603,4P±0.25P,50V,C0G,ROHS pcs 2 C117, C129

170 112-063560-R01 Chip capacitor / 0603,56P±5%,50V,C0G,ROHS pcs 2 C139, C194

171 112-0635R0-R01 Chip capacitor / 0603,5P±0.25P,50V,C0G,ROHS pcs 1 C116

172 112-063680-R01 Chip capacitor / 0603,68P±5%,50V,C0G,ROHS pcs 1 C144

173 112-063683-R01 Chip capacitor / 0603,0.068uF±10%,16V,X7R, ROHS pcs 1 C193

174 112-0636R0-R01 Chip capacitor / 0603,6P±0.5P,50V,C0G,ROHS pcs 2 C136, C206

175 112-0638R0-R01 Chip capacitor / 0603,8P±0.5P,50V,C0G,ROHS pcs 2 C135, C77

176 112-063R50-R01 Chip capacitor / 0603,0.5P±0.1P,50V,C0G,ROHS pcs 1 C115

177 112-072105-R01 Chip Ta capacitor/ TP Model, SIZE P, 1uF±20%, 10V,

ROHS

178 112-072106-R01 Chip Ta capacitor/ TP Model, SIZE P, 10uF±20%,

6.3V, ROHS

179 112-072225-R01 Chip Ta capacitor / TP Model, SIZE P, 2.2uF±20%,

10V, ROHS

180 112-072475-R01 Chip Ta capacitor / TP Model, SIZE P, 4.7uF±20%,

10V, ROHS

181 112-073105-R01 Chip capacitor / 0805, 1uF+80%--20%, 16V, Y5V,

ROHS

182 112-073225-R01 Chip capacitor / 0805, 2.2uF+80%--20%, 10V, Y5V,

ROHS

183 112-102106-R02 Chip Ta capacitor / TS Model, SIZE A, 10uF±20%,

10V, ROHS

184 112-102156-R01 Chip Ta capacitor / TS Model, SIZE A, 15uF±20%,

6.3V, ROHS

185 112-102475-R02 Chip Ta capacitor / TS Model, SIZE A, 4.7uF±20%,

16V, ROHS

186 112-172107-R02 Chip Ta capacitor / TS Model, SIZE C, 100uF±20%,

10V, ROHS

187 113-010100-R01 Chip trimming capacitor / TZV2Z100A110,

3~10p+100, ROHS

188 114-06E221-R01 Chip Wire inductor / C1608CB-R22J, 220nH±5%,

0603, ROHS

189 114-06E331-R02 Chip inductor / MLF1608R33K, 330nH±10%, 0603,

ROHS

190 114-06E560-R01 Chip Wire inductor / C1608CB-56NJ, 56nH±5%,

0603, ROHS

191 114-06E680-R01 Chip Wire inductor / C1608CB-68NJ, 68nH±5%,

0603, ROHS

192 114-06G120-R01 Chip inductor / MLG1608B12NJT, 12nH±5%, 0603,

ROHS

193 114-06G181-R01 Chip inductor / LGHK1608R18J-T, 180nH±5%, 0603,

ROHS

194 114-06G221-R02 Chip inductor / LGHK1608R22J-T, 220nH±5%, 0603,

ROHS

195 114-06G270-R01 Chip inductor / MLG1608B27NJ, 27nH±5%, 0603,

ROHS

196 114-06G332-R01 Chip inductor / MLF1608A3R3K, 3.3uH±5%, 0603,

ROHS

197 114-06G470-R01 Chip inductor / MLG1608B47NJ, 47nH±5%, 0603,

ROHS

198 114-07E220-R01 Chip Wire inductor/ C2012C-22NJ, 22nH±5%, 0805,

ROHS

199 114-07E221-R01 Chip Wire inductor/ LQW2BHNR22NJ03L /

LQN21AR22J, 220nH±5%, 0805, ROHS

200 114-07E330-R01 Chip Wire inductor / C2012C-33NJ, 33nH±5%, 0805, pcs 1 L30

pcs 4 C2, C120, C121, C62

pcs 1 C33

pcs 3 C191, C198, C199

pcs 3 C140, C207, C246

pcs 7 C165, C201, C202, C273, C292, C298, C308

pcs 1 C306

pcs 1 C234

pcs 3 C197, C203, C210

pcs 1 C208

pcs 3 C46, C240, C266

pcs 1 C401

pcs 2 C180, C181

pcs 2 L18, L36

pcs 2 L11, L59

pcs 1 L13

pcs 1 L53

pcs 1 L31

pcs 2 L27, L50

pcs 2 L49, L52

pcs 3 L12, L32, L33

pcs 2 L28, L29

pcs 1 L35

pcs 1 L51

pcs 1 L26

22

PT4208 Service Manual

ROHS

201 114-08E103-R01 Chip inductor / FSLM2520-100J, 10uH±5%, 1008,

ROHS

202 114-08E821-R01 Chip inductor / FSLM2520-R82K, 820nH±10%,

1008, ROHS

203 115-1R53R0-R04 Chip air-cored coil/ 0.3*1.5*3TR,negative,high pin，

ROHS

204 115-1R54R0-R04 Chip air-cored coil/ 0.3*1.5*4TR,negative,high pin，

ROHS

205 115-1R55R0-R01 Chip air-cored coil/ 0.3*1.5*5TR, negative, high pin，

ROHS

206 115-1R58R0-R02 Chip air-cored coil/ 0.4*1.5*8TR,negative,high pin,

ROHS

207 117-000000-R04 Chip bead / EMI, FILTER, SMT, BLM11A221S,

0603, ROHS

208 117-000000-R05 Chip bead / EMI, FILTER, SMT, BLM21P300S,

0805, ROHS

209 119-060104-R01 Hot quick resistor / NTH5G16P42B104K07TH,

100K, 0603, ROHS

210 121-200000-R01 MIC socket / B6027AP402-88,ROHS pcs 1 MIC1

211 122-116M80-R01 Chip transistor / TVCGDCSANF,16.8MHz ±

2.5PPm，ROHS

212 122-17M300-R01 Chip crystal resonator / CSTCR7M30G53-R0, 7.3M,

ROHS

213 124-050000-R15 2.5mm Earphone socket / MOTOROLA, PJ-D2008B,

DC30V0.5A, ROHS

214 124-050000-R16 3.5mm MIC socket / MOTOROLA, PJ-D3027,

DC30V0.5A, ROHS

216 203-007200-R02 PT7200 pogo pin /brass/ Au plate/ ROHS pcs 3

218 603-0W558A-R01 Voice recorder IC / W588A080,binding, ROHS pcs 1 IC15

Electronic Parts List (136-174MHz)

No. Part No. Description Unit Qty. Position Mark

1 101-04208V-R02 PT4208PCB / VHF, FR-4, 1.2mm, PT4208V-090401,

ROHS

2 102-0R8C2A-R01 MCU / R8C/2A, R5F212A8SNFP, PLQP-64, ROHS pcs 1 IC10

3 102-9140NR-R01 Reset IC / PST9140NR, ROHS pcs 1 IC11

4 102-A31136-R01 IF(MF) modulation IC / TA31136FN, SSOP, ROHS pcs 1 IC5

5 102-AT2408-R02 Memory IC / AT24C08BN-SH, ROHS pcs 1 IC9

6 102-B15E03-R01 PLL IC / MB15E03SL, PLL, 16-PIN, SSOP, ROHS pcs 1 IC1

7 102-DA8541-R01 AUDIO, AMP / TDA8541, SO8, ROHS pcs 1 IC8

8 102-HT7130-R01 Voltage regulator IC / HT7130-1, SOT-89, ROHS pcs 1 IC14

9 102-HT7150-R01 Voltage regulator IC / HT7150-1, ROHS pcs 1 IC12

10 102-M2902V-R01 Operational amplifier / NJM2902V, OP-AMP, ROHS pcs 3 IC4, IC6, IC7

11 102-M2904V-R01 Operational amplifier/ NJM2904V, OP-AMP, ROHS pcs 1 IC3

12 103-0MA742-R01 Chip switch diode / MA742(PANASONIC), ROHS pcs 1 D17

13 103-1SR154-R01 Chip diode, / 1SR154-400(ROHM), ROHS pcs 1 D33

14 103-1SS372-R01 Chip switch diode / 1SS372(TOSHIBA),ROHS pcs 1 D13

15 103-1SV278-R01 Chip variable capacitor diode / 1SV278, ROHS pcs 1 D12

16 103-1SV305-R01 Chip variable capacitor diode / 1SV305,ROHS pcs 1 D30

17 103-1SV325-R01 Chip variable capacitor diode / 1SV325, ROHS pcs 8 D8, D9, D10, D11, D18, D31, D32, D34

18 103-A2S111-R01 Chip switch diode / 0603, MA2S111(PANASONIC),

ROHS

19 103-DAN222-R01 Chip switch diode / DAN222, (ROHM), ROHS pcs 1 D308

20 103-HSC277-R01 Chip diode / Waveband switch, HSC277(HITACHI),

ROHS

21 103-HVC131-R01 Chip HF switch diode / 0603, HVC131(HITACHI),

ROHS

22 103-HVC376-R01 Chip variable capacitor diode / HVC376B, ROHS pcs 3 D21, D23, D24

23 103-HZU5AL-R01 Chip Voltage regulator diode / HZU5ALL(HITACHI),

ROHS

pcs 1 L45

pcs 2 L55, L56

pcs 10 L1, L2, L3, L4, L5, L6, L7, L8, L9, L10

pcs 2 L14, L15

pcs 1 L24

pcs 1 L25

pcs 13 L19, L20, L40, L41, L42, L44, L46, L47, L48, L60, L61, L65, L66

pcs 7 L22, L37, L38, L39, L43, L58, L67

pcs 1 R85

pcs 1 X4

pcs 1 X2

pcs 1 J2

pcs 1 J1

pcs 1

pcs 3 D15, D16, D25

pcs 3 D3, D6, D7

pcs 4 D1, D2, D4, D5

pcs 1 D14

23

PT4208 Service Manual

24 103-L190YG-R01 Chip LED / 0603, green, H19-213SYGC, ROHS pcs 2 D20, D29

25 103-MHC190-R02 Chip LED / 0603, red, 19-21SURC/S530-A2/TR8,

ROHS

26 104-A144EE-R01 Chip triode / DTA144EE(ROHM), ROHS pcs 3 Q17, Q34, Q40

27 104-C144EE-R01 Chip triode / DTC144EE(ROHM), ROHS pcs 11 Q8, Q22, Q23, Q26, Q27, Q35, Q39, Q42, Q44, Q52, Q101

28 104-C144EU-R01 Chip triode / DTC144EUA(ROHM), ROHS pcs 1 Q18

29 104-KRX102-R01 Chip triode / KRX102U, with, bias, resistor, ROHS pcs 1 IC2

30 104-MT717T-R01 Chip triode / FMMT717TA,ROHS pcs 1 Q30

31 104-SA1586-R01 Chip triode / 2SA1586, ROHS pcs 1 Q43

32 104-SC1623-R01 Chip triode / 2SC1623,ROHS pcs 1 Q10

33 104-SC4617-R02 Chip triode / 2SC4617(R)(ROHM), ROHS pcs 4 Q6, Q7, Q9, Q37

34 104-SC4919-R01 Chip triode / 2SC4919, MUTING,

CIRCUIT(SANYO), ROHS

35 104-SC5108-R01 Chip triode / 2SC5108Y(TOSHIBA), ROHS pcs 3 Q2, Q4, Q5

36 104-TA1298-R01 Chip triode / KTA1298(Y), ROHS pcs 3 Q29, Q31, Q32

37 104-TC4082-R01 Chip triode / KTC4082, (KEC), ROHS pcs 2 Q1, Q21

38 105-2SJ243-R01 Chip FET (field-effect transistor) / 2SJ243, ROHS pcs 1 Q16

39 105-2SK508-R01 Chip FET(field-effect transistor) / 2SK508NV(K52),

ROHS

40 105-2SK880-R01 Chip FET (field-effect transistor) / 2SK880，ROHS pcs 1 Q90

41 105-3SK318-R01 Chip FET (field-effect transistor) / 3SK318, ROHS pcs 2 Q19, Q20

42 105-SK1588-R01 Chip FET (field-effect transistor) / 2SK1588(NEC),

ROHS

43 105-SK1824-R01 Chip FET (field-effect transistor) / 2SK1824, ROHS pcs 7 Q13, Q25, Q33, Q36, Q38, Q41, Q51

44 105-SK3475-R01 Chip FET (field-effect transistor) / 2SK3475(6200 add

WB"), ROHS"

45 105-SK3476-R01 Chip FET (field-effect transistor) / 2SK3476, ROHS pcs 1 Q11

46 106-0BA010-R01 Knob switch / SKHLLBA010, import, ROHS pcs 1 K1

47 106-454548-R01 Touch switch / 4.5*4.5*4.8, ROHS pcs 2 K2, K4

48 106-ED0873-R01 3208/558 Carbon encoder switch /

ED0873-16-16HC-F18(9), BAND, ROHS

49 106-LBE010-R01 Chip touch switch / SKRTLBE010, ROHS pcs 1 K3

50 108-450C24-R02 Chip phase frequency detector/ JTBM450CX24,

ROHS

51 108-CF450G-R02 Chip porcelain filter/ LTWC450G, 450kHz±5kHz,

ROHS

52 108-XF4995-R01 Chip IF filter / 49.95MHz±7.5KHz, U-5*2, ROHS pair 2 XF1, XF2

53 109-040000-R01 Chip resistor/ 0402,0R±5%, ROHS pcs 16 C34, C67, C166, C250, R7, R24, R27, R30, R36, R43, R103, R202, R241, R260,

54 109-040100-R01 Chip resistor/ 0402,10R±5%, ROHS pcs 7 R37, R96, R98, R101, R200, R217,R283

55 109-040101-R01 Chip resistor/ 0402,100R±5%, ROHS pcs 6 R4, R12, R89, R128, R180, R240

56 109-040102-R01 Chip resistor/ 0402,1K±5%, ROHS pcs 22 R41, R42, R45, R47, R48, R49, R50, R69, R129, R130, R131, R150, R152, R157,

57 109-040103-R01 Chip resistor/ 0402,10K±5%, ROHS pcs 26 R29, R46, R100, R109, R110, R119, R120, R121, R122, R123, R133, R136, R137,

58 109-040104-R01 Chip resistor/ 0402,100K±5%, ROHS pcs 23 R6, R79, R80, R84,R257, R104, R107, R113, R115, R116, R154, R158, R174,

59 109-040105-R01 Chip resistor/ 0402,1M±5%, ROHS pcs 3 R108, R160, R162

60 109-040121-R01 Chip resistor/ 0402,120R±5%, ROHS pcs 1 R244

61 109-040122-R01 Chip resistor/ 0402,1.2K±5%, ROHS pcs 3 R44, R141, R188

62 109-040123-R01 Chip resistor/ 0402,12K±5%, ROHS pcs 2 R211, R301

63 109-040124-R01 Chip resistor/ 0402,120K±5%, ROHS pcs 3 R5, R8, R9

64 109-040151-R01 Chip resistor/ 0402,150R±5%, ROHS pcs 1 R179

65 109-040152-R01 Chip resistor/ 0402,1.5K±5%, ROHS pcs 2 R10, R54

66 109-040153-R01 Chip resistor/ 0402,15K±5%, ROHS pcs 8 C187, C188, C189, C265, R142, R192, R203, R209

67 109-040154-R01 Chip resistor/ 0402,150K±5%, ROHS pcs 4 R66, R94, R201,R279

68 109-040180-R01 Chip resistor/ 0402,18R±5%, ROHS pcs 1 R38

69 109-040182-R01 Chip resistor/ 0402,1.8K±5%, ROHS pcs 1 R224

70 109-040183-R01 Chip resistor/ 0402,18K±5%, ROHS pcs 4 R149, R210, R218, R219

71 109-040184-R01 Chip resistor/ 0402,180K±1%, ROHS pcs 2 R67, R86

72 109-040220-R01 Chip resistor/ 0402,22R±5%, ROHS pcs 3 R274, R799, R945

24

pcs 1 D28

pcs 1 Q24

pcs 2 Q14, Q15

pcs 1 Q102

pcs 1 Q12

pcs 1 SW2

pcs 1 CD1

pcs 1 CF1

R261, R278

R191, R199, R234, R256, R280, R281, R826, R902

R138, R139, R140, R183, R194, R228, R254, R264, R266, R268, R275, R900,

R953

R197, R235, R236, R243, R247, R249, R272, R297, R300, R864

PT4208 Service Manual

73 109-040221-R01 Chip resistor/ 0402,220R±5%, ROHS pcs 5 R71, R189, R214, R215, R216

74 109-040222-R01 Chip resistor/ 0402,2.2K±5%, ROHS pcs 7 R18, R39, R57, R181, R185, R186, R187

75 109-040223-R01 Chip resistor/ 0402,22K±5%, ROHS pcs 3 R106, R153, R198

76 109-040224-R01 Chip resistor/ 0402,220K±5%,ROHS pcs 5 R17, R87, R164, R233, R246,

77 109-040271-R01 Chip resistor/ 0402,270R±5%,ROHS pcs 2 R70, R91

78 109-040272-R01 Chip resistor/ 0402,2.7K±5%,ROHS pcs 3 R124, R148, R223

79 109-040273-R01 Chip resistor/ 0402,27K±5%,ROHS pcs 4 R171, R172, R193, R271

80 109-040274-R01 Chip resistor/ 0402,270K±5%,ROHS pcs 1 R231

81 109-040303-R01 Chip resistor/ 0402,30K±5%,ROHS pcs 3 R28, R76, R212

82 109-040331-R01 Chip resistor/ 0402,330R±5%,ROHS pcs 5 R23, R35, R73, R920, R921

83 109-040332-R01 Chip resistor/ 0402,3.3K±5%,ROHS pcs 6 R26, R55, R59, R60, R97, R111

84 109-040333-R01 Chip resistor/ 0402,33K±5%,ROHS pcs 6 R114, R161, R196, R206, R258, R375

85 109-040334-R01 Chip resistor/ 0402,330K±5%,ROHS pcs 3 R15, R82, R105

86 109-040362-R01 Chip resistor/ 0402,3.6K±5%,ROHS pcs 1 R62

87 109-040363-R01 Chip resistor/ 0402,36K±5%,ROHS pcs 1 R248

88 109-040392-R01 Chip resistor/ 0402,3.9K±5%,ROHS pcs 4 R52, R205, R221, R222

89 109-040393-R01 Chip resistor/ 0402,39K±5%,ROHS pcs 2 R53, R68

90 109-040394-R01 Chip resistor/ 0402,390K±5%,ROHS pcs 1 R165

91 109-040470-R01 Chip resistor/ 0402,47R±5%,ROHS pcs 2 R95, R182

92 109-040471-R01 Chip resistor/ 0402,470R±5%,ROHS pcs 3 R2, R3, R81

93 109-040472-R01 Chip resistor/ 0402,4.7K±5%,ROHS pcs 13 R56, R61, R155,R156,R92, R99, R118, R125, R151, R159, R204, R282, R808

94 109-040473-R01 Chip resistor/ 0402,47K±5%,ROHS pcs 11 R11, R13, R19, R20, R21, R22, R25, R273, R277, R292, R901

95 109-040474-R01 Chip resistor/ 0402,470K±5%,ROHS pcs 4 R166, R232, R374, R903

96 109-040560-R01 Chip resistor/ 0402,56R±5%,ROHS pcs 1 R58

97 109-040561-R01 Chip resistor/ 0402,560R±5%,ROHS pcs 3 R40, R72,R238,

98 109-040562-R01 Chip resistor/ 0402,5.6K±5%,ROHS pcs 8 R63, R64, R65, R132,C276, R184, R195, R302

99 109-040563-R01 Chip resistor/ 0402,56K±5%,ROHS pcs 8 R16, R173, R175, R176, R177, R178, R239, R376

100 109-040681-R01 Chip resistor/ 0402,680R±5%,ROHS pcs 1 R127

101 109-040682-R01 Chip resistor/ 0402,6.8K±5%,ROHS pcs 1 R220,

102 109-040683-R01 Chip resistor/ 0402,68K±5%,ROHS pcs 3 R75, R190, R245

103 109-040684-R01 Chip resistor/ 0402,680K±5%,ROHS pcs 1 R77

104 109-040750-R01 Chip resistor/ 0402,75R±5%,ROHS pcs 1 R31

105 109-040753-R01 Chip resistor/ 0402,75K±5%,ROHS pcs 1 R78

106 109-040754-R01 Chip resistor/ 0402,750K±5%,ROHS pcs 1 R163

107 109-040821-R01 Chip resistor/ 0402,820R±5%,ROHS pcs 1 R33

108 109-040822-R01 Chip resistor/ 0402,8.2K±5%,ROHS pcs 2 R229, R230

109 109-040823-R01 Chip resistor/ 0402,82K±5%,ROHS pcs 2 R51, R255,

110 109-040913-R01 Chip resistor/ 0402,91K±5%,ROHS pcs 1 R213

111 109-060000-R01 Chip resistor/ 0603,0R±5%,ROHS pcs 6 C95, L9, L18, L49, L54, L62

112 109-060100-R01 Chip resistor/ 0603,10R±5%,ROHS pcs 1 L21

113 109-060101-R01 Chip resistor/ 0603,100R±5%,ROHS pcs 2 R74, R88

114 109-060154-R02 Chip resistor/ 0603,150K±1%,ROHS pcs 6 R143, R144, R145, R146, R147, R170

115 109-060271-R01 Chip resistor/ 0603,270R±5%,ROHS pcs 2 R34, R934

116 109-060470-R01 Chip resistor/ 0603,47R±5%,ROHS pcs 1 L34

117 109-100R47-R01 Chip resistor/ 1206,0.47R±5%,ROHS pcs 3 R167, R168, R169

118 110-110223-R01 Chip trimming resistor / MVR22HXBRN223,

22K±25%, B Linear, ROHS

119 110-110683-R01 Chip trimming resistor / MVR22HXBRN683,

68K±25%, B Linear, ROHS

120 110-220103-R03 Volume switch / RY-6932，ROHS pcs 1 SW1

121 111-030000-R01 Chip self resume safety / 433003, 3A/32V, 1206(old

429003)，ROHS

122 112-043100-R01 Chip capacitor / 0402, 10P±0.5P, 50V, C0G, ROHS pcs 5 C87, C92, C257, C282, C288

123 112-043101-R01 Chip capacitor / 0402,100P±5%, 50V, C0G, ROHS pcs 1 C196

124 112-043102-R01 Chip capacitor / 0402, 1000P±10%, 50V, X7R,

ROHS

125 112-043103-R01 Chip capacitor / 0402, 0.01uF±10%, 50V, X7R,

ROHS

126 112-043104-R02 Chip capacitor / 0402, 0.1uF±10%, 16V, X7R, ROHS pcs 19 C35, C80, C82, C83, C85, C101, C167, C168, C173, C174, C175, C178, C221,

25

pcs 1 VR2

pcs 1 VR1

pcs 1 F1

pcs 60 C1, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C18, C19, C20, C21,

C29, C38, C39, C40, C41, C42, C44, C72, C73, C74, C75, C96, C97, C100, C103,

C105, C106, C107, C109, C111, C112, C114, C123, C124, C128, C147, C150,

C151, C169, C172, C182, C184, C186, C241, C263, C264, C268, C272, C278,

C279, C294, C652, C658, C943

pcs 20 C50, C79, C104, C149, C153, C155, C159, C160, C161, C162, C190, C226, C232,

C253, C296, C509, C853, C900, C901, C902

PT4208 Service Manual

C231, C233, C254, C271, C307, C310

127 112-043105-R01 Chip capacitor / 0402, 1uF±10%, 6.3V, X5R, ROHS pcs 13 C25, C30, C138, C170, C183, C192, C225, C235, C248, C251, C300, C303, C400

128 112-043110-R01 Chip capacitor / 0402, 11P±5%, 50V, C0G, ROHS pcs 1 C651

129 112-043120-R01 Chip capacitor / 0402, 12P±5%, 50V, C0G, ROHS pcs 1 C145

130 112-043122-R01 Chip capacitor / 0402, 1200P±10%, 50V, X7R,

ROHS

131 112-043123-R01 Chip capacitor / 0402, 0.012uF±10%, 25V, X7R,

ROHS

132 112-043150-R01 Chip capacitor / 0402, 15P±5%, 50V, C0G, ROHS pcs 1 C143

133 112-043152-R01 Chip capacitor / 0402, 1500P±10%, 50V, X7R,

ROHS

134 112-043153-R01 Chip capacitor / 0402, 0.015uF±10%, 50V, X7R,

ROHS

135 112-043180-R01 Chip capacitor / 0402, 18P±5%, 50V, C0G, ROHS pcs 4 C69, C127, C212, C230

136 112-043182-R01 Chip capacitor / 0402, 1800P±10%, 50V, X7R,

ROHS

137 112-043220-R01 Chip capacitor / 0402, 22P±5%, 50V, C0G, ROHS pcs 3 C110, C255, C256

138 112-043221-R01 Chip capacitor / 0402, 220P±5%, 50V, C0G, ROHS pcs 1 C295

139 112-043222-R01 Chip capacitor / 0402, 2200P±10%, 50V, X7R,

ROHS

140 112-043223-R01 Chip capacitor / 0402, 0.022uF±10%, 25V, X7R,

ROHS

141 112-043224-R02 Chip capacitor / 0402, 0.22uF±10%, 10V, X7R,

ROHS

142 112-043240-R01 Chip capacitor / 0402, 24P±5%, 50V, C0G, ROHS pcs 1 C227

143 112-0432R0-R01 Chip capacitor / 0402, 2P±0.25P, 50V, C0G, ROHS pcs 1 C122

144 112-043300-R01 Chip capacitor / 0402, 30P±5%, 50V, C0G, ROHS pcs 1 C32

145 112-043330-R01 Chip capacitor / 0402, 33P±5%, 50V, C0G, ROHS pcs 4 C37, C47, C141, C171

146 112-043333-R01 Chip capacitor / 0402, 0.033uF±10%, 16V, X7R,

ROHS

147 112-043390-R01 Chip capacitor / 0402, 39P±5%, 50V, C0G, ROHS pcs 1 C119

148 112-043392-R01 Chip capacitor / 0402, 3900P±10%, 50V, X7R,

ROHS

149 112-043393-R01 Chip capacitor / 0402, 0.039uF±10%, 10V, X7R,

ROHS

150 112-0433R0-R01 Chip capacitor / 0402, 3P±0.25P, 50V, C0G, ROHS pcs 2 C90, C131

151 112-043470-R01 Chip capacitor / 0402, 47P±5%, 50V, C0G, ROHS pcs 4 C4, C118, C293, C904

152 112-043471-R01 Chip capacitor / 0402, 470P±10%, 50V, X7R, ROHS pcs 45 C22, C24, C26, C28, C31, C36, C43, C45, C48, C49, C52, C53, C54, C55, C56,

153 112-043472-R01 Chip capacitor / 0402, 4700P±10%, 25V, X7R,

ROHS

154 112-043473-R01 Chip capacitor / 0402, 0.047uF±10%, 16V, X7R,

ROHS

155 112-0434R0-R01 Chip capacitor / 0402, 4P±0.25P, 50V, C0G, ROHS pcs 4 C132, C218, C228, C654

156 112-0434R7-R01 Chip capacitor / 0402, 4.5P/4.7P±0.25P, 50V, C0G,

ROHS

157 112-043560-R01 Chip capacitor / 0402, 56P±5%, 50V, C0G, ROHS pcs 2 C200, C224

158 112-043680-R01 Chip capacitor / 0402, 68P±5%, 50V, C0G, ROHS pcs 1 C945

159 112-043681-R01 Chip capacitor / 0402, 680P±10%, 16V, X7R, ROHS pcs 3 C57, C258, C260

160 112-043683-R01 Chip capacitor / 0402, 0.068uF±10%, 16V, X7R,

ROHS

161 112-0436R0-R01 Chip capacitor / 0402, 6P±0.5P, 50V, C0G, ROHS pcs 2 C653, C657

162 112-043820-R01 Chip capacitor / 0402, 82P±5%, 50V, C0G, ROHS pcs 1 C214

163 112-0438R0-R01 Chip capacitor / 0402, 8P±0.5P, 50V, C0G, ROHS pcs 2 C229, C655

164 112-0439R0-R01 Chip capacitor / 0402, 9P±0.5P, 50V, C0G, ROHS pcs 1 C656

165 112-043R50-R01 Chip capacitor / 0402, 0.5P±0.1P, 50V, C0G, ROHS pcs 1 C120

166 112-063101-R01 Chip capacitor / 0603, 100P±5%, 50V, C0G, ROHS pcs 2 C5, C93

167 112-063102-R01 Chip capacitor / 0603, 1000P±10%, 50V, X7R,

ROHS

168 112-063104-R01 Chip capacitor / 0603, 0.1uF±10%, 50V, X7R, ROHS pcs 1 C193,

pcs 1 C211

pcs 7 C156, C157, C158, C215, C239, C249, C275

pcs 1 C289

pcs 1 C244

pcs 2 C51, C113

pcs 1 C262

pcs 7 C179, C185, C243, C245, C317, C318, C386

pcs 1 C280

pcs 4 C213, C223, C242, C283

pcs 3 C222, C238, C284

pcs 2 C252, C299

C58, C59, C60, C61, C71, C84, C86, C102, C108, C125, C152, C154, C163, C220,

C237, C267, C269, C270, C274, C277, C286, C287, C290, C291, C297, C305,

C315, C316, C502, C969

pcs 1 C285

pcs 1 C301

pcs 4 C126, C216, C217, C219

pcs 4 C247, C259, C176, 177

pcs 2 C27, C139

26

PT4208 Service Manual

169 112-063110-R01 Chip capacitor / 0603, 11P±5%, 50V, C0G, ROHS pcs 4 C2, C62, C63, L35

170 112-063130-R01 Chip capacitor / 0603, 13P±5%, 50V, C0G, ROHS pcs 1 C133

171 112-063150-R01 Chip capacitor / 0603, 15P±5%, 50V, C0G, ROHS pcs 1 C129

172 112-063160-R01 Chip capacitor / 0603, 16P±5%, 50V, C0G, ROHS pcs 1 C3

173 112-063220-R01 Chip capacitor / 0603, 22P±5%, 50V, C0G, ROHS pcs 3 C117, C135, C195

174 112-063240-R01 Chip capacitor / 0603, 24P±5%, 50V, C0G, ROHS pcs 1 C78

175 112-063270-R01 Chip capacitor / 0603, 27P±5%, 50V, C0G, ROHS pcs 4 C65, C81, C142, C650

176 112-063300-R01 Chip capacitor / 0603, 30P±5%, 50V, C0G, ROHS pcs 1 C144

177 112-0634R7-R01 Chip capacitor / 0603, 4.5P/4.7P±0.25P, 50V, C0G,

ROHS

178 112-063560-R01 Chip capacitor / 0603, 56P±5%, 50V, C0G,R OHS pcs 1 C194

179 112-0635R0-R01 Chip capacitor / 0603, 5P±0.25P, 50V, C0G, ROHS pcs 2 C94, C98

180 112-0637R0-R01 Chip capacitor / 0603, 7P±0.5P, 50V, C0G, ROHS pcs 2 C121, C137

181 112-063820-R01 Chip capacitor / 0603, 82P±5%, 50V, C0G, ROHS pcs 1 C91

182 112-063R50-R01 Chip capacitor / 0603, 0.5P±0.1P, 50V, C0G, ROHS pcs 1 C236

183 112-063R75-R01 Chip capacitor / 0603, 0.75P±0.25P, 50V, C0G,

ROHS

184 112-072105-R01 Chip Ta capacitor / TP Model, SIZE P, 1uF±20%,10V,

ROHS

185 112-072106-R01 Chip Ta capacitor / TP Model, SIZE P, 10uF±20%,

6.3V, ROHS

186 112-072106-R02 Chip Ta capacitor / TP Model, SIZE P, 10uF±20%,

10V, ROHS

187 112-072225-R01 Chip Ta capacitor / TP Model, SIZE P, 2.2uF±20%,

10V, ROHS

188 112-072475-R01 Chip Ta capacitor / TP Model, SIZE P, 4.7uF±20%,

10V, ROHS

189 112-073104-R01 Chip capacitor / 0805, 0.1uF±10%, 50V, X7R, ROHS pcs 2 C205,C204

190 112-073105-R01 Chip capacitor / 0805, 1uF+80%--20%, 16V, Y5V,

ROHS

191 112-073225-R01 Chip capacitor / 0805, 2.2uF+80%--20%, 10V, Y5V,

ROHS

192 112-073475-R01 Chip capacitor / 0805, 4.7uF±10%, 6.3V, X7R,

ROHS

193 112-102106-R02 Chip Ta capacitor / TS Model, SIZE A,10uF±20%,

10V, ROHS

194 112-102156-R01 Chip Ta capacitor / TS Model, SIZE A, 15uF±20%,

6.3V, ROHS

195 112-102475-R02 Chip Ta capacitor / TS Model, SIZE A, 4.7uF±20%,

16V, ROHS

196 112-172107-R02 Chip Ta capacitor / TS Model, SIZE C, 100uF±20%,

10V, ROHS

197 113-010100-R01 Chip trimming capacitor / TZV2Z100A110,

3~10p+100, ROHS

198 114-06E330-R01 Chip Wire inductor/ C1608CB-33NJ, green, ceramic

core33NH±5%, 0603, ROHS

199 114-06E331-R02 Chip inductor / MLF1608R33K, 330nH±10%, 0603,

ROHS

200 114-06E470-R01 Chip Wire inductor/ C1608CB-47NJ, green, ceramic

core47NH±5%, 0603, ROHS

201 114-06E560-R01 Chip Wire inductor/ C1608CB-56NJ, ceramic

core56nH±5%,0603, ROHS

202 114-06G101-R01 Chip inductor / MLF1608DR10K, 100nH±10%, 0603,

ROHS

203 114-06G101-R03 Chip inductor / MLG1608BR10J, 100nH±5%, 0603,

ROHS

204 114-06G151-R01 Chip inductor / MLF1608DR15K, 150nH±10%, 0603,

ROHS

205 114-06G270-R01 Chip inductor / MLG1608B27NJ, 27nH±5%, 0603,

ROHS

206 114-06G561-R01 Chip inductor / MLF1608DR56K, 560nH±10%, 0603,

ROHS

pcs 1 C88

pcs 1 C115

pcs 1 C33

pcs 3 C165, C191, C198,

pcs 1 C199

pcs 2 C140, C246

pcs 7 C201, C202, C207,C273, C292, C298, C308

pcs 1 C306

pcs 1 C234

pcs 1 C209

pcs 3 C197, C203, C210

pcs 1 C208

pcs 3 C46, C240, C266

pcs 1 C401

pcs 2 C180, C181

pcs 1 L120

pcs 1 L59

pcs 1 L121

pcs 1 L13

pcs 1 L12

pcs 2 L32, L33

pcs 1 L11

pcs 2 L16, L23

pcs 1 L124

27

PT4208 Service Manual

207 114-06G682-R01 Chip inductor / MLF1608E6R8K, 6.8uH±10%, 0603,

ROHS

208 114-06GR15-R01 Chip inductor / MLG1608BR15J, 150nH±5%, 0603,

ROHS

209 114-07E220-R01 Chip Wire inductor/

C2012C-22NJ,22nH±5%,0805,ROHS

210 114-07E330-R01 Chip Wire inductor/ C2012C-33NJ, 33nH±5%, 0805,

ROHS

211 114-07E470-R01 Chip Wire inductor/ C2012C-47NJ, 47nH±5%, 0805,

ROHS

212 114-07E560-R01 Chip Wire inductor/ LQN21A56NJ04, 56nH±5%,

0805, ROHS

213 114-08E102-R02 Chip Wire inductor/ 2520, 1H±5%, ceramic

core(FHW1008UC1R0J), ROHS

214 114-08E103-R01 Chip inductor / FSLM2520-100J, 10uH±5%, 1008,

ROHS

215 114-08E222-R02 Chip inductor / FSLM2520-2R2K, 2.2uH±10%, 1008,

ROHS

216 114-08E331-R01 Chip inductor / FSLM2520-R33K, 330nH±10%, 1008,

ROHS

217 114-08E561-R01 Chip inductor / FSLM2520-R56K, 560nH±10%, 1008,

ROHS

218 115-1R07R0-R01 Chip air-cored coil/ 0.3*1.0*7TR, negative, high pin,

ROHS

219 115-1R53R0-R04 Chip air-cored coil/ 0.4*1.5*3TL, negative, high pin,

ROHS

220 115-1R55R0-R02 Chip air-cored coil/ 0.3*1.5*5TR, negative, high pin，

ROHS

221 115-1R56R0-R04 Chip air-cored coil/ 0.3*1.5*6TR, negative, high pin，

ROHS

222 115-1R58R0-R03 Chip air-cored coil/ 0.4*1.5*8TR, negative, high pin,

ROHS

223 117-000000-R04 Chip bead / EMI,FILTER, SMT, BLM11A221S,

0603, ROHS

224 117-000000-R05 Chip bead / EMI, FILTER, SMT, BLM21P300S,

0805, ROHS

225 117-000000-R08 Chip bead / EMI,FILTER, SMT, BLM11A601S,

0603, ROHS

226 119-060104-R01 Hot quick resistor / NTH5G16P42B104K07TH, 100K,

0603, ROHS

227 121-200000-R01 MIC socket / B6027AP402-88,ROHS pcs 1 MIC1

228 122-116M80-R02 Chip transistor / TVCGDCSANF, 16.8MHz±2.5PPm，

ROHS

229 122-17M300-R01 Chip crystal resonator / CSTCR7M30G53-R0, 7.3M,

ROHS

230 124-050000-R15 2.5mm Earphone socket / MOTOROLA, PJ-D2008B,

DC30V0.5A, ROHS

231 124-050000-R16 3.5mm MIC socket / MOTOROLA, PJ-D3027,

DC30V0.5A, ROHS

232 603-0W558A-R01 Voice recorder IC / W588A080, binding, ROHS pcs 1 IC15

pcs 6 L27, L28, L29, L36, L50, L52

pcs 1 L53

pcs 1 L30

pcs 1 L51

pcs 1 L15

pcs 3 L5, L8, L10

pcs 1 L24

pcs 1 L45

pcs 1 L26

pcs 1 L55

pcs 1 L56

pcs 1 L4

pcs 2 L80, L83

pcs 2 L3, L81

pcs 2 L2, L14

pcs 1 L25

pcs 14 L19, L20, L39, L40, L41, L42, L44, L46, L47, L48, L60, L61, L65, L66

pcs 6 L22, L37, L38, L43, L58, L67

pcs 2 L409, L419

pcs 1 R85

pcs 1 X4

pcs 1 X2

pcs 1 J2

pcs 1 J1

28

PT4208 Service Manual

Appendix 3 Structural Parts List

Front Cabinet ASM.

No. Part No. Description PCS No. Part No. Description PCS

1 201-004208-R01 Front Cabinet 1 6 204-003208-R02 Dust-proof Net for Speaker 1

2 201-004208-R09 Light Guide 1 7 121-100000-R20 Speaker 1

3 201-004208-R08 Earphone Jack Cover 1 8 202-004208-R02 Rubber PTT Key 1

4 301-25080J-R01 Screw M2.5*8.0 1 9 201-004208-R04 PTT Key 1

5 204-004208-R02 Dust-proof Net for MIC 1 10 202-004208-R03 MIC Rubber Waterproof 1

Al Chassis ASM.

No. Part No. Description PCS No. Part No. Description PCS

1 203-004208-R01 Al Chassis 1 5 301-20040G-R01 Screw M2.0*4.0 2

2 203-000558-007 Antenna Socket 1 6 202-003208-R07 Heat Exchange Silicone

Rubber Washer

3 202-007200-R06 POGO Pin Waterproof 1 7 204-007200-R03 Sponge for POGO 1

4 202-004208-R01 Main Waterproof 1

Channel Selector Knob ASM.

No. Part No. Description PCS No. Part No. Description PCS

1 201-004208-R07 Channel Selector Knob 1 2 203-003208-R09 Circlip 1

Volume Knob ASM.

No. Part No. Description PCS No. Part No. Description PCS

1 201-004208-R06 Volume Knob 1 2 203-003208-R09 Circlip 1

Coping ASM.

No. Part No. Description PCS No. Part No. Description PCS

1 201-004208-R02 Coping 1 3 201-004208-R03 Battery Latch 1

2 301-25050J-R01 Screw M2.5*5.0 2 4 203-000558-R05 Spring for Battery Latch 1

1

29

PT4208 Service Manual

NO. PART NUMBER DESCRIPTION PCS

1 121-100000-R20 SPEAKER 1

2 201-004208-R01A FRONT CABINET 1

3 201-004208-R02A COPING 1

4 201-004208-R03A BATTERY LATCH 1

5 201-004208-R04A PTT KEY 1

6 201-004208-R05A POGO PIN SOCKET 1

7 201-004208-R06A VOLUME KNOB 1

8 201-004208-R07A CHANNEL SELECTOR KNOB 1

9 201-004208-R08A EARPHONE JACK COVER 1

10 201-004208-R09A LIGHT GUIDE 1

11 202-003208-R07 HEAT EXCHANGE SILICONE RUBBER WASHER 1

12 202-004208-R01A MAIN WATERPROOF 1

13 202-004208-R02A RUBBER PTT KEY 1

14 202-004208-R03A MIC RUBBER WATERPROOF 1

15 202-007200-R06 POGO PIN WATERPROOF 1

16 203-000558-R02 NUT FOR KNOB 2

17 203-000558-R05B SPRING FOR BATTERY LATCH 1

18 203-000558-R07 ANTENNA SOCKET 1

19 203-003208-R09 CIRCLIP 2

20 203-004208-R01A AL CHASSIS 1

21 203-004208-R02A EARPHONE PLATE 1

22 203-007200-R07B NUT FOR ANTENNA SOCKET 1

23 204-003208-R02 DUST-PROOF NET FOR SPEAKER 1

24 204-004208-R02A DUST-PROOF NET FOR MIC 1

25 204-005583-R01 SPONGE 4MM 2

26 204-006500-R02 MIC SOCKET GUARDIAN 1

27 204-007200-R03 SPONGE FOR POGO PIN 1

28 301-20040G-R01 SCREW M2.0*4.0 12

29 301-20080G-R02 SCREW M2.0*8.0 2

30 301-25050J-R01 SCREW M2.5*5.0 2

31 301-25080J-R01 SCREW M2.5*8.0 1

30

PT4208 Service Manual

Appendix 4 Accessories

Name Model Specifications External View

Battery KB-70B 7.4V 1700mAh Li Polymer

Battery

Hand strap KGS-03

Earphone KME-014

KME-015

Charger KBC-70Q Fast Charger

DC OUT 12V 800mA

Power adaptor KTC-50A1/50C1/50E1/50F1

Antenna KA stubby antenna

31

PT4208 Service Manual

Figure 1 PT4208 Block Diagram

J1

SPK JACK

MIC1

6

CN1

APC

5C

5R

Q34

BATTARY

IC3

LPF

APC CONTROL

BPF

5

ANT SW

5T

Q17

APC

5R5R

Q20

RF AMP

MIC

J2

MIC JACK

SW

5M

IC7 A

C245&R188

IC7 B

RXD

AF AMP

Preemphasis

IDC

AF2

SW

Q36

IC8

Q9

SPEAKER

CN601

6

MUTE2

TDA8541

AF POWER AMP

AC

SW

Q35

SW

Q36

MUTE

BATTARY

7.5V

TXD

AFCO

SW1

POW&VOL

PT-4208 UHF SCHEMATIC

IC12

HT7150-1

5

HP

5V

Q11

RF POWER

DRIVE

4

5T

Q3 Q12

PRE

DRIVE

BPF

Q19

MIX

49.95MHz

XF1&XF2

PTV-R

5T

Q2

RF AMP

TX/RX SW

5T 5R

3

5C

RF AMP

Q5 Q4

BUFF

CD1

450KHZ

DET COLL

5R

TX/RX SW

SW

IC 2

Q6

RIPPLE

FILTER

5M

2

Q14

RX-VCO

MOD

Q15

TX-VCO

5R

Q21

IF AMP

CF1

IC5

IF DEMODULATOR

AF OUT

Q7

AMP

NOISE

DET

D17&D18

LP

IC7 C

HP

IC6 B

LP

IC7 C

IC6 A

VR2

MOD

VR1

IC6 D

TI

Q30

FMMT591

5R

LP

HP

IC4 B

5M

LP

LP

IC4 A

SW

Q32

IC11

RESET

PST9140NR

RESET

SW

Q26

SAVE

4

5C

450KHz

5R

CTC OUT

AF2

Q37

DTMF0 &BEEP & ALARM

BUFFER

R59&C223

De-emphasized

5R

Q31

SW

5R

IC6 C

AF AMP

5T

SW

Q29

SW2

ENCODER

K1:PTT

KEY

K2:MONI

5RC5TC

SW

Q27

K4:SW

K3:ALARM

3

2

BUSY

50.4MHZ

Q1

IC 14

CTC OUT

TCXO

16.8MHz

7130

3 th

16.8MHz

5V

B B

LOOP FILTER

IC1

PLL IC

1

5M

PLL-CLK

PLL-LE

A A

X4

MB15E03SL

3V

PLL-DA

PLL-UL

W588A080-AF

SW

Q24

5V

32

X2

W588C

APC

BUSY1

SDATA

SCLK

SDA

SCL

UL

RXD

TI

C C

7.3MHz

IC9

24LC08

IC10

CPU

R5F212A8

EEPROM

5V

1

BUSY1

BATT

RST

BUSY

AFCORXG-LED

ALARM BELL

SCLK

SDATA

CTC OUT

BEEPACCK

DATA

R-LED

SAVE

MUTE

5RC

5TC

TXD

W588C

LE

PTV-R

TX/RX SW

D D

PT4208 Service Manual

Figure 2 PT4208 Schematic Circuit Diagram (420-470MHz)

J1

SPK1

SPK JACK

C401

100UF/10V

471

Q1022SK1588

C267

471

C277

R274

22R

104

C271

8

7

5

6

VCC

GND

OUT-

OUT+

MODE1SVR2IN+3IN-

4

R273

47K

C273 4. 7uF/10V

102

Q35

DTC144EE

Q51

2SK1824

R292

R157

C170A

105

Q36

2SK1824

100K

C170

5.6K
R184

R64

5.6K

393

C252

220K

R165 390K

R87

C158

123

R211

12K

2

4

3

1

V+

B-in

B+in

Bout

Cout8C-in9C+in10GND11D+in12D-in13Dout

R9

82K

R300

68K

470K

C235

105

R77 470 K

R166

R162

1M

C199

10uF/6.3V

C53

18K
R218

R133 10K

R174

100K

C299 393

C296 103

R236 100K

9

8

10

C-in

Cout

C+in

GND

7

C295 221

R149

18K

R210

18K

C298

4.7uF/10V

C297

471

R46

47K

R212

6.8K

Q42

DTC144EE

Q39

DEVC2

DTC144EE

DEVC1

DT

UL

2T IN

SCL

IC10

R5F212A8

32

UL

DT

CK

2TIN

CK

33

LE

LE

34

5MC

35

INT

INT

36

TXD

TXD

37

RXD

RXD

38

AFCO

AFCO

39

RX

RX

40

GLED

GLED

41

APC

APC

42

RLED

RLED

43

SAVE

SAVE

44

MUTE

MUTE

45

5RC

5RC

46

5TC

5TC

47

NC

MUTE2

48

BUSY

RSSI

TI

495051525354555657585960616263

TI

BUSY

RSSI

MANDOWN

C270471

8.2K
R230

220R
R215

471
C269

8.2K
R229

220R

DTC144EE

R214

Q22

*

*

R81

470R

R405

5M

Q101

DTC144EE

R110

10K

R2261K

C286

471

R279 180K

R238

1.2K

C280

224

R2780RC279

DTC144EE

Q52

47K

R277

47K

AC

1K

AC

5R

AF

Q40

DTA144EE

W:H N:L

471

R272

100K

R246

220K

R255

82K

R275 10K

R276 *

TI

C246

2.2uF/10V

R60

3.3K

C155

103

10K

R266 10K

R268 1 0K

R254

PS

ECO1

ECO2

ECO3

SDA

NCNCNC

PS

SCL

SDA

ENC1

ENC2

ENC3

AC

BUSY_V

VCCN

AVSS

DTMF

NC

BATT

MANDOWN

W588C

DTMFO

BATT

W588C

BUSY V

VSS-1

VCCN1

AC

10K

L61

R228

BLM11A221S

C152 471

C71

8

VCC

A01A12A23GND

IC9 AT2408N

C308

Q43

R198

Q41

Q34

333

C213

R175

56K

R233

R235

WNTC

R29 10K

WNTC

ECO0

WNTCNCENC0

SCLK_V

DATA_V

VREF

AVCC

VCC-1

C54

C52

L60

BLM11A221S

471

7

TEST

4.7uF/10V

C310

104

2SA1586

22K

5V

DTMF

R280

1K
105

C300

R220

2SK1824

R301 12K

DTA144EE

IC7 NJM2902V

5.6K

R65

C238

392

102
C272

220K

R234 1K

100K

L62

0R

5M

5M

C201

5V

5R 5C

5T

5

VCC

NC1VEE12VEE2

IC11

R299

*

R282

171819202122232425262728293031

OSCSI

PABC

16

DEV2

15

DEV1

14

TO1

13

TO0

12

SHIFT

11

VCC

10

XIN

9

VSS

8

XOUT

7

RST

6

DNKEY

5

PTT

4

MODE

3

UPKEY

2

TOPKEY

1

64

DATA V

SCLK V

471

471

SCL

R135

*

R134 *

R49

1K

R115

100K

6

5

SCL

SDA

4

MIC1

MIC

C55

471

5.6K

R30

Q44

DTC144EE

L48

Q24

2SC4919

R33

820R

R221

D308

DAN222

R12

100R

C176

C140

2.2uF/10V

10P

D13

1SS372

6.8K

C101

104

C257

R188 1.2K

R196

33K

56K

R177

L19 BLM11A221S

5

7

3

6

4

V+

B-in

B+in

Bout

A+in

Cout8C-in9C+in10GND11D+in12D-in13Dout

C258

681

C57

681

R219

18K

392

C284

R176

56K
333
C283

68K
R245

GND

IC12

HT7150-1

OUT IN

R139

10K

2SC1623

Q10

Q30 FMMT717

C56

471

4.7uF/10V

L43

BLM21P300S

C112

102

R187

2.2K

R138

10K

Q26

Q32 K TA1298

C175

104

5C

R186

2.2K

R137 10K

Q31 KTA1298

C174

104

5R

R136

10K

R185

2.2K
Q27

Q29

KTA1298

C173

104

5T

C84

471

5

104

330K

C85

R82

OUT1VDD2GND

4

IC13

OUT

R296

*

C123102

PST9140NR

3

RESET

T2 MODE

T4 TXD

T3

4.7K

RST

MODE

TXD

INT

10K

R264

DEVC2

471

DEVC1

C315

TO1

PCTV-RO

SHIFT

R101

10R

VCC

XIN
VSS

XOUT

C256

22P

1K

C90

3P

C255 22P

R47

*

Q28

RST

TOPKEY

PTT

UPKEY

DNKEY

MODE

SHIFT

MANDOWN

1K

SDA

*

R281

PGM

ST

VDD

VOUT

678

IC17

MANDOWN

123

4 5

CLKC1MODE

GND

J2

MIC JACK

C400

105

PTT

471

C61

C59

471

R216 220R

R302

5.6K

5M

RXD

MUTE2

TXD

R501K

R140

10K

C111

102

BLM11A221S

R224

1.8KR3470R

C203 10uF/10V

C177

104

3.9K
C58

471

MUTE

R78

75K

683

C113

182

R222

3.9K

683

R163

560K

C259

223

C210

10uF/10V

C245

R53

39K

1

2

C178

104

A-in

Aout

14

R192

15K

C260

681

R83

*

R178

56K

BATT

MUTE
AFCO

C114

102

4.7uF/10V

C202

R159

4.7K

D7

HSC277

DTC144EE

2T IN

SAVE

C312

*

C309*C311

*

R293

*

R289

R285

5RC

R284

*

DTC144EE

5TC

C302 *

NC4NC

*

3

UPKEY

VCCS
T8

T5 RXD

RXD

TOPKEY

R116

100K

BLM11A221S

L42

C316

471

PTT

L66

DNKEY

BLM11A221S

ECO1

X2

7.3MHz

ECO3

ECO2

ECO0

10R

R283

*

473

12345

6

C301

*

SCA60C

*

*

R287 *

R291 *

R290 *

6

8

5

7

V+

B-in

B+in

Bout

R295

*

Aout1A-in2A+in3GND

IC16 *

4

R294

C146

*

R286

C49

R80

100K

K4

C287

471

R249

100K

R172

27K

R223

2.7K

SW2

*

*

R288

*

C314

*

C313

*

R252

*

R253

*

R251

*

AF

471

PFI

K3

ALARM

C502

471

K1

PTT
471

C60

K2

MONI

47K

R22

47K
R21

47K

R20

47K

C159 103 C160 103 C161 103 C1 62 103

R19

ENCODER

6

PT4208-03(420-470MHz)

page 1 of 1

Model Na me

REV

5

S C H

2009/6/15

4

Check

Name

File No

Desined By Appreoved by

3

2

1

-

+

DC

C46

4.7uF/16V

C45

C230 3P

R103 100K R107 100KR79 100KR43

100K

C229 1P

R84

R247 100K

C43

471

C47 7P

C182 3.5P

100K

R297

6P
C32

C42

471

C145

5P

5R

IC5

XIN

XOUT

MIXOUT

VCC

DEC

FILO

FILI8AF

R100 10K

27K

10R

L21

C163471

L59

330nH

C200

20P

47P

C212

18P

510

SCLK V

1K

R130

471

D30

HVC350B

R108

*

C318

223

PCTV-R

D26

HVC350B

C261

105

R206

33K

C317

C186

HVC350B
D24

223

471

R161

33K

SB

C44

471

*

R112

R197

100K

5R

D23

HVC350B

471

C183

HVC350B
D22

100K

HVC350B

1K

D21

R262

C268

471

RSSI

TA31136

C171

33P

RSSI

C221

104

MIXI

16

GND

15

NREC

14

NDET

13

C214

100P

RSSI

CD1

C24450

12

IFO

11

QUAD

10

9

3K
R148

122

R124

*

C211

*

3.3K

Q33

R111

C169

102

W:H N:L

C165

4.7uF/10V

225
C234

APC

C67

0R

R363

2.7K

C166

0R

R131

1K

C224 27P

Q25

2SK1824

R152

Q1

KTC4082

R128

R127

DATA V

1K

1K

R154

C303

105

C304

*

100R

10R

W588C

IC15W588A080

R129

SDATA8NC

9

NC

VDD

7

10

SCLK

OSC

6

11

VSS

BUSY1

5

12

PWM-

NC

4

13

VDD1

NC

3

14

SPK

NC

2

15

VSS1

RST

1

16

6

5

4

3

2

1

L17

*

C64

*

C63

3.5P

L3

3T

C129

4P

C62

1.5P

L14

4T

C117

3.5P
D5

C2

C78

12P

C77

10P

C76

*

C125

R1

*

HSC277

2P

L2

3T

C3

2P

D4

HSC277

C5

471

C65

*

L4

3T

C7

471

C116

5P

D1

C93

L1

Q11

PT-4208 UHF SCHEMATIC

R241

C86

471

4

3

C263 102

270R

MA77

D2

*

L26 220nH

R34

8P

82P

C135

C80

474

11P

3T

C133

C149

103

15P
C91

C9

471

L25

8T

C94

18P

C8

471

R51

82K

RD07MVS1

R31

47R

*
C81

47K
R11

C139

43P

L16

0R

C12

471

L38

L24

5T

C95

102

BLM21P300S

C10

471

R54

1.5K

RD01MUS1

Q12

C92

*

R23

0R

L23

0R

C134

*

L31

12nH

C119

100P

R38

1K

Q3

2SC3356
R36

8.2K

C118

5P

L12

27nH

C11

471

R37

1K

Q2

2SC5108(Y)

R10

47K

5.6K

C6

471

R61

D3

3.3K

HSC277

R56

5P

C87

R57 3.3K

L33 27nH

2SC5108(Y)

Q4

R55

3.3K
47nH

C143

22P

L35

R240

100R

C141

20P

L32 27nH

Q5

2SC5108(Y)

R66

180K

C147 0.5P

L28

3.3uH

0R

C120 2.5P

Q14 2SK508NV(K52)

370-420MHz

L30

33nH

C142

C144

47P

15P

D8ISV32 5

D18 *

L27

180nH

R256

1K

C75

102

VCCN

R261 0R

X4

16.8MHz
R258 33K

VC

VCC

100K

1

C289 152

R257

GND

OUT

2

L45

10uH

C25

C288

10P

C282

10P

R96 10R

L41

BLM11A221S

C30

105

R39

C22

471

R142

C15 471

5T

C79

103

C21

471

C192

474

L37 BLM21P300S

5T

R75 47K

C97

102

R68

39K

C17

471

L39
BLM21P300S

C20

471

R73

22R

471

C16

5T 5T

R72

33R

C13

471

5T

471

C18

R95

10R

C24 471

C19 471

C100

102

R35 270R

C23

R62 5.6K

L40

BLM11A221S

2

3

R88

100R

C14

471

C102

IC2 KRX10 2U

4

5 1

Q16

C236 1P

R70 180R

6P

C99

102

R74

100R

C136

L29

R89 100R

C98

102

2.5P

C88

L49

220nH

L18

220nH

C115 0.5P

10P

L51

MA360

C180

5P

D12

L36

220nH

C194

C66

*

*

R90

100R

D9ISV325

D31

R13 47K

R14

47K

D34*

R117

10K

L50

R102

100K

C96

102

L46

BLM11A221S

R119

T1 PD

R2

R141

R202

C191

10uF/6.3V

C190

103

0R

R260

C172

102

*

R259

C154

471
BLM11A221S
L20

OSCIN

R/

1

OSCOUT

P/

2

C31

471

VP

LD/FOUT

105

3

VCC

ZC

4

DO

PS

5

GND

LE

6

XFIN

DATA

7

FIN8CLOCK

C264

102

10uF/6.3V
C198

IC1

MB15E03SL

3.9K

15K

C196

100P

*

471

R104 100K

2SJ243

C148 1P

3.3uH

C137 2.5P

Q15

22nH

39P

D10 ISV325

180nH

L47

10K

2.2K

0R

560R

R244

560R

16
15
14
13
12
11
10

9

Q17

DTA144EE

8

7

V+

Aout1A-in2A+in3GND

IC3 NJM2904

R144

150K

R143

150K

R145

R24

0R

DTC144EUA
Q18

HZU5ALL
D14

10uF/10V
C197

5C

R150

1K

C26

Q6

2SC4617(S)

C104

102
110R
R91

C206 6P

C121

2P

2SK508NV(K52)

C195

10P

C181

10P

L52 220nH

2P

C89

ISV325

D11

*

D32

C103

102

BLM11A221S

C204

334

C205

*

C207

2.2uF/10V

R40

2.7K

C193 683

R123

R164 220K

D15

MA2S111

R41

C187

15K

C188 15K
C189 15K

C68

*

R105

330K

R160

1M

C106

102

56K

R173

C29

471

R171

27K

C105

102

R42

6

5

B-in

B+in

Bout

4

R250

C27

R147

150K

471

R170

150K

R146

150K

150K

R168

0.47R

R167

0.47R

R169

0.47R

Q13

C122

5P

R92

D6 HSC277

471

C208

15uF/6.3V

4.7K
R151

D16

MA2S111

C28

471

5C

420-470MHz

D17

RX

L44

BLM11A221S

5C

UL

10K

*
C164

1K

R10910K

PS

R122

LE

10K

R12110K

DT

CK

R120

10K

C265 15K

TO ANT

CN1

C37 471C227 33P

L8 3T

L15

4T

C70 3P

C126 6P

C218

1P

L9 3T

C128 7P

C217

0.75P

1K

*

2SK1824

L53

68nH

C278

102

R239

R158

100K

10K

5R

C153

103

CF1 450G

C51

C38

R15

330K

Q7

2SC4617

C35

MA742

1uF/10V

C33

R25

BUSY

C292

4.7uF/10V

C291

471

GND

OUT IN

C290

471

R502

L10 3T

C127 7P

C220

471

L34

0R

R190

68K

3SK318

Q20

R189

180R

R182

0R

C41

471

R181

*
56nH

C40

471

L54

22R

L13

R93 22R

C228 4P

C34

471

L7

3T

C219

0.5P

L6 3T

7P

C124

*

C132

C216

0.75P

L5 3T

R243

100K

471

C36

R16 56K

R71

180R

56K

3SK318

Q19

L55

R45

*

0.82uH
L56

0.82uH

R32

47R

C151

102

C39

471

C131

3P

R180

100R

XF2

49.95MHz

C69

15P

XF1

49.95MHz

R179

150R

C130

*

C150

102

Q21

KTC4082

R5

120K

R44

5.6K

1
2
3
4

IFI

5
6

R94 150K

7

C107 102

182

C74 102

1K
R97

R99

R69

1K

Q8

DTC144EE

C138

103

102

C83 104

R26

3.3K

C108

471

R58

100R

C73

102

104

C82

104

102

C72

T

R85 100K

47K

R28

15K

105

C209

R153 33K

C184

102

C1102P

C1

102

R4 100R

R17

120K

L11

330nH

HT7130-1

C4

11121612

R18

IC14

356810

IC105

*

CLK

VDD

1

8

DATA

COUT

2

7

*

BUSY

OSC

3

6

VDD4GND

5

7.5V

B+

C232

103

R376 56K

33K

C231

104

D25

MA2S111

C48

471

L58

BLM21P300S

C109

102

5R

F1 3A

C237

471

C226

103

C233

104

C240

4.7uF/16V

D33

1SR154-400

L22

SW1 P OW&VOL

BEEP&W588AFAFO

C274

471

R232

470K

R231

270K

C239

C223

333

C262222

R67 180K

R86 180K

C247

683

C251

105

WNTC

R375

R374

470K

C266

4.7uF/16V

C254

104

C253

103

BLM21P300S

L67

BLM21P300S

R217

0R

IC8 TDA8541

C250

0R

Q38

2SK1824

R237

*

6.8K

C276

C167 104

Q9

2SC4617(S)

R7 0R

R213

R8

120K

C244

153

10K

R194

C249

123

C157 123

6

7

5

A-in

Aout

A+in

IC6 NJM2902V

14

123

R63 5.6K

R132

5.6K

R59

3.3K

123

C156

C215 123

C168

104

D27 *

C275

123

C294102

13

12

14

D-in

D+in

Dout

Aout1A-in2A+in3V+4B+in5B-in6Bout

IC4NJM2902V

22K

R106

R113

100K

C293

47P

R114

33K

L65 BLM11A221S

91K

11

5R

22K

56K

R248

VR2

R209

22K

R76 15K

R6

100K

82K

R2084.7K

R271

*

20K

R27

C281

VR1

68K

R155

15K

R156

15K

TO1

683

C243

C242

683

R265 33K

R263

33K

PCTV-RO

C358

223

C357

223

VCCN

223

C179

R125 4.7K

4.7K

R118

C185

223

1K

R191

C248

105

223

C386

DTMF

VCCN1

R195

5.6K

Q37

2SC4617

100K

C225

R183

C305

471
10R
R200

150K

R201

R199

472

C285

R205

4.7K
C50

103

C241

102

R204

4.7K

105

C222

392

10K

R193

27K

R203

10k

R524.7 K

DTMFO

105

BUSY V

C306

1K

R48

1K

C307 104

GLED

RLED

D29

GREEN

Q23

DTC144EE

D20

GREEN

D28

RED

R98

10R

D19

*

A A

B B

33

C C

D D

PT4208 Service Manual

Figure 5 PT4208 Main Board Top Layer Position Value Diagram (420-470MHz)

36

PT4208 Service Manual

Figure 6 PT4208 Main Board Bottom Layer Position Value Diagram (420-470MHz)

37

PT4208 Service Manual

Figure 7 PT4208 Main Board Top Layer Layout (420-470MHz)

38

PT4208 Service Manual

Figure 8 PT4208 Main Board Bottom Layer Layout (420-470MHz)

39

PT4208 Service Manual

Figure 9 PT4208 Schematic Circuit Diagram (136-174MHz)

*

SPK1

3344221

J1 SPK JACK

-

+

DC

C46

4.7uF/16V

C45

D30

100K
R84

C652

NC

R112

102

C943

D23

R79 100K

R297

100K

5R

BLM11A601S

R945

22R

IC5

TA31136

XIN

XOUT

MIXOUT

VCC

DEC
FILO

FILI8AF

4.7K

C163471

R953

10K

C945

68P

56P

C224

56P

C200

Q1

18P

47P

C212

2.2K

SCLK V

1K

R130

471

1SV305

R108

1M

C318

223

R206

C128

C186

HVC376B
D24

102

102

R197

100K

R799

22R

C43

471

HVC376B

C124

C182

HVC376B
D21

C268

C183

33K

102

PCTV-R

C317

223

102

R161

33K

SB

C44

5R

102

102

R262

*

102

105

RSSI

RSSI

R924

NC

C171

33P

C221

104

MIXI

16

GND

15

NREC

14

NDET

13

CD1

RSSI

C214

82P

12

C24450

IFO

11

QUAD

10

9

2.7K
R148

122

R124

2.7K

C211

3.3K

Q33

R111

2SK1824

C169

102

C165

10uF/6.3V

W:H N:L

225
C234

C67

0R

APC

C166 0R

R131

1K

Q25

2SK1824

R152

105

R154

C303

KTC4082

C304

*

R128

100R

R127

680R

W588C

DATA V

IC15W588A080

R129

1K

SDATA8NC

9

NC

VDD

7

10

SCLK

OSC

6

11

VSS

BUSY1

5

12

PWM-

NC

4

13

VDD1

NC

3

14

SPK

NC

2

15

VSS1

RST

1

16

CN1

6

5

4

3

2

1

TO ANT

24P

L17

*

C64

*

C63

11P

L3

0.3*1.5*5T

C129

15P

C62

11P

L14

HVC131

0.3*1.5*6T

C117

22P

D5

D4

C2

HVC131

11P

L2

27P

0.3*1.5*6T

C3

16P

100P
C5

D1

HVC131

100P

C93

L83

3T

L81

5T

C91

82P

L80

3T

C134

C17

PT4208 -01 VHF SCHEMATIC

R241

C86

C650

L4

0.3*1.0*7T
24P

C65

*

C116

C7

102

D2

R34

270R

HVC131

C15 102

24P

L26

C78

2.2uH
R934

270R

T:1.6V

R:0.4V

22P

C135

C80

104

C149

103

C9

102

13P

L25

8T

C133

BLM21P300S

L37

C94

5P

C8

102

Q11

R51

82K

R31

75R

2SK3476

*

47K
R11

L16

27nH

C81

27P

C139

1000P

R23

330R

C95

0R

C12

102

*

L24

1uH

C10

102

R75

68K

Q12

C97

R54

1.5K

2SK3475

R68

39K

C92

10P

L23

27nH

C20

1000P

R921

330R

18R

R38

R920

330R

39P

C119

102

R73

C16

330R

L12

100nH

R37

10R

102

R10

1.5K
C11

Q2

R72

560R

C118

47P

2SC5108(Y)

0R

R36

C6

102

102

4.7K
C13

R61

D3

4.7K

HSC277

R56

10P

C87

R57 330R

C18

102

C19

102

L33

100nH

2SC5108(Y)

Q4

R35

330R

R55

3.3K
R62

3.6K

C143

15P

L35

11p

C141

33P

R240

100R

L32100nH

Q5

R66

150K

2SC5108(Y)

0.5P

C236

*

C99

C136

*

C120

0R

471

0.5P

R70

270R

L18

0R

L28

Q14

C88

4.5P

C98

5P

L30

22nH

136-174MHz

2SK508NV(K52)

10P
C180

27P

C142

L36

6.8uH

C144

30P

*
C66

D8 ISV325

D18 ISV325

L27

6.8uH
C96

102

Q90

C900

103

1K

R256

1K

R902

C75

102

C125

471

X4

4

3

C263 102

C282

R1

*

VCCN

R261 0R

16.8MHz

0R

R260

R258 33K

VC

VCC

100K

1

*

C289 152

R259

R257

GND

OUT

2

BLM11A221S

L45

10uH

C288

10P

10P

C31

471

10R

C25

105

R96

L41

BLM11A221S

C264

102

C30

105

C198

10uF/6.3V

L38

102

C14

R89100R

6.8uH

D9ISV325

D34ISV325

2SK880

C191

C172

L20

Q17

DTA144EE

R39

3.3K
R105

R160

1M

C106

C22

471

C29

C105

102

6

8

7

V+

B-in

Bout

Aout1A-in2A+in3GND

IC3 NJM2904

R142

15K

5T

C79

103

C21

102

C192

105

BLM21P300S

L39

BLM11A221S

C27

R144

R147

102

150K

R143

150K

C196

100P

150K

R145

R146

150K

R168

R167

R169

R24

0R

DTC144EUA
Q18

5T

HZU5ALL

D14

10uF/10V
C197

C657

47nH

4P

L121

C654

33nH

6P

L120

C653

D6 HSC277

5T 5T

T:0V

R:2.8V

5T

R95

5C

47R

C24

471

102

C100

NC

R150

1K

C23

C26

L40

BLM11A221S

3

R88

100R

IC2 KRX102U

4

102

102

C147

470K

R903

R901

47K

103

C902

10K

C901

R900

10uF/6.3V

C190

102

C154

471

1
2

VP

3
4

DO

5
6
7

471

2

5 1

C115

0.75P

D12

47K

R13

L46

BLM11A221S

T1 PD

103

103

OSCIN

VCC

GND
XFIN

FIN8CLOCK

IC1

MB15E03SL

C208

Q6

2SC4617(S)

R151

4.7K

471

C102

D16

MA2S111

C28

471

R104

100K

Q16

2SJ243

R74

100R

C104

103P

R91

270R

L49

0R

6.8uH

Q15

2SK508NV(K52)

C1217PC137

7P

L51 33nH

C195

22P

C181

10P

56P

L52 6.8uH

C194

1SV278

C89 *

ISV325

D11

D31

ISV325

ISV325

D10

D32ISV325

C103102

L50

6.8uH

L47

C204

104

BLM11A221S

R119

10K

R2

470R

R90

*

*

C905

*

R102

*

Q906

104

C207

4.7uF/6.3V

C205

R141

1.2K

0R

R202

R40

560R

R244

C193

104

120R

R123

10K

R164

220K

*

R/

D15

16

MA2S111

OSCOUT

P/

15

LD/FOUT

R41

1K

14

ZC

13

PS

R10910K

12

LE

R12210K

11

DATA

R121 10K

10

R120

9

10K

15K

C187

C188

15K

C189 15K
15K

C265

L15

C227

47nH

C37

C68

330K

102

R173

102

5

B+in

4

150K

R170

0.47R

0.47R

0.47R

6P

C656

9P

C655

8P

15uF/6.3V

5C

L29

5C

C164

PS

LE

DT

CK

33P

*

56K

R171

27K

R42

1K

R250

*

150K

Q13

2SK1824

L53 150nH

2P

C122

C278

102

R158

100K

R92

4.7K

5R

C509

CF1 450G

Q7

D17

MA742

C33

RX

L44

BLM11A221S

OUT IN

L8

56nH

11P

C651

C70

NC

L9

0R

C218

4P

18P

C126

4.5P
R107

C230

100K

4.5P

C217

L10

56nH

8P

C229

0R

18P

R103

C127

47R

L34

C220

471

R190

68K
R247100K

3SK318

R189

220R

Q20

47R

C41

102

R182

C40

102

R181

2.2K
56nH

L54

0R

L13

BLM11A601S

L409

C34

0R

4P

C228

L7

NC

C47 33P

C219

4.5P

3.5P
C132

C216

4.5P

L5

56nH

C32

30P

0R

R43

R243

100K

471

C36

R16

56K

C688

*

R71

R239

C658

C153

103

560nH

R15

330K

2SC4617(S)

C35

1uF/10V

BUSY

C292

C291

471

GND

C290

471

R502

220R

56K

3SK318

Q19

C42

102

12P

1K

C145

L55

102

0.33uH
R45

L419

L56

0.56uH

C151

102

102

C39

C969

471

C131

3P

R180

100R

XF2

49.95MHz

C69

18P

XF1

103

49.95MHz

R179

150R

C130

*

102

C150

Q21

KTC4082

R5

240K

R44

1.2K

L124

1
2
3
4

IFI

5

R94

6
7

150K

182

102

102

C74

C51

C107

10K

R100

R99

R97

3.3K

R69 1K

10R

Q8

L21

DTC144EE

C83

C138

105

C38

102

104

R26

3.3K

C108

471

R58

100R

C73

102

104

C82

104

102

C72

T

R85 100K

R25

47K

R28

30K

4.7uF
C209

R153 22K

C184

102

L59

330nH

47P

4.7uF/10V
C904

22P

100R

C110

R4

C1

102

R17

220K

L11

150nH

HT7130-1

C4

IC14

R18

IC105

NC

CLK

VDD

1

8

DATA

COUT

2

7

NC

BUSY

OSC

3

6

VDD4GND

5

7.5V

B+

C232

103

C231

104

D25

MA2S111

F1 3A

D33

1SR154-400

C48

471

C237

471

L22

BLM21P300S

C226

103

C233

104

SW1 PO W&VOL

L58

BLM21P300S

C240

4.7uF/16V

C109

102

BEEP&W588AFAFO

R7 0R

C274

471

R232

470K

270K

R231

IC6 NJM29 02V

5R

123

C239

R59

C223

333

C262222

C275

123

180K

14

R67

IC4 NJM2902V

180K

22K

R106

R86

C247

683

C251

105

WNTC

5R

R209

15K

R6

100K

*

R27

R208

0R

VR1

68K

R155

4.7K

C243223

C242

333

R263*

C358

*

C357 *

R125 4.7K

R191

1K

R1184.7K

C248

105

DTMF

R195

5.6K

1K

Q37

2SC4617(S)

R205

3.9K

100K

C241

102

R204

4.7K

105

C225

C222

R183

10K

R193

27K

R203

15K

DTMFO

C305

470

BUSY V

105

C306

D20

GREEN

1K

R201

150K

R199

10R

R200

R48

1K

R98

10R

C307 104

56K

R375

33K

R376

R374

470K

C266

4.7uF/16V
471

C267

C254

104

C253

103

L67

8

7

OUT+

BLM21A300S

R217

10R

MODE1SVR2IN+3IN-

IC8 TDA8541

4.7uF/10V

R273

47K

C250

0R

Q38

2SK1824

Q35

DTC144EE

R237

*

Q51

2SK1824

5.6K

C276

104

C170

105

C167

Q9

2SC4617(S)

R213

91K

R8

120K

C244

153

R184

5.6K

R165

390K

10K

R194

C249

123

C157 123

7

4

6

5

3

V+

A-in

Aout

B+in

A+in

14

470K

5.6K

C235

105

R63

R132

5.6K

3.3K
R166

R162

1M

123

123

C156

C215

C168

104

R174

100K

D27*

C294 102

100K

12

13

10

11

D-in

Dout

C+in

D+in

GND

Aout1A-in2A+in3V+4B+in5B-in6Bout

R113

100K

R149

18K

R210

C293

47P

R114

33K

L65 BLM11A221S

DTC144EE

Q42

22K

R248

36K

VR2

R76 30K

R271

27K

R80839K

C281

*

DEVC1

DEVC2

4.7K
R156

TO1

IC10

TO0

R265

*

CK

33

LE

34
35

INT

36

VCCN

TXD

37

RXD

223

38

C179

AFCO

39

RX

40

GLED

41

C185

223

APC

42

RLED

43

223

SAVE

44

C386

MUTE

45

5RC

46

VCCN1

5TC

47

MUTE2

48

472

C285

C50

103

392

R523. 9K

GLED

RLED

D29

GREEN

Q23

DTC144EE

R230

C269

471

D28

RED

Q22

DTC144EE

220R

D19

*

1

*

C401

R405

100UF/10V

C853

103

Q102

R81

2SK1588

5M

C277

471

Q101

DTC144EE

R274

22R

104

C271

5

6

VCC

GND

OUT-

R279 150K

4

560R

C273

R238

C280

224

R2780RC279

102

Q52

R292

47K

R277

47K

R157

1K

AC

Q36

2SK1824

AC

R862

*

R864

100K

R860

*

5.6K
R865

*

R64

C252393

R87

220K

123

R211

12K

C158

5R

2

1

B-in

Bout

Cout8C-in9C+in10GND11D+in12D-in13Dout

AF

R9

120K

R300

100K

680K

W:H N:L

R77

Q40

DTA144EE

C199

10uF/10V

C53

471

R218

18K

R133

10K

103

393

R236

C299

C296

8

9

R272

100K

C-in

Cout

R246

220K

7

C295221

18K

R255

82K

C298

4.7uF/10V

C297

471

R275 10K

R276 *

TI

2.2uF/10V

C246

R46

10K

R60

3.3K

R212

30K

103

C155

Q39

DTC144EE

10K

R266 10K

R268 10K

R254

SDA

SCL

ULULDT

2T IN

ECO1

PS

R5F212A8

32

NCNCNC

UL

DT

PS

CK

SDA

SCL

2TIN

ENC1

LE

5MC

INT

TXD

RXD

AFCO

RX

GLED

APC

RLED

R5F212A8SNFP

SAVE

MUTE
5RC
5TC

NC

AC

BUSY_V

VCCN

NC

BATT

MANDOWN

BUSY

RSSI

TI

W588C

495051525354555657585960616263

BATT

TI

BUSY

W588C

BUSY V

MANDOWN

RSSI

VCCN1

AC

10K

R228

C270

471

8.2K
C152 471

R215

220R

R229

8.2K

R214

470R

R110

10K

R826

1K

470P

C286

DTC144EE

C213

R175

WNTC

ECO0

ECO2

ECO3

ENC2

ENC3

AVSS

DTMF

VSS-1

DTMFO

L61

L60

BLM11A221S

C71

471

8

VCC

A01A12A23GND

IC9 AT2408N

4.7uF/10V

C308

Q43

2SA1586

22K

R198

5V

Q41

2SK1824

Q34

333

56K

R233

220K

R235

100K

R29 10K

WNTC

WNTCNCENC0

OSCSI

SCLK_V

DATA_V

VREF

AVCC

DATA V

VCC-1

C52

471

BLM11A221S

7

TEST

Q44

C310

104

DTMF

R280

1K

R12

C300

105

C257

R220

6.8K

R196

12K

R301

7

Bout

DTA144EE

Cout8C-in9C+in10GND11D+in12D-in13Dout

IC7 NJM2902V

5.6K

R65

C238

392

102
C272

R2341K

L62

0R

Q30 FMMT717

5M

4.7uF/10V

5M

C201

L43

BLM21P300S

5V

Q32 KTA1298

5C

Q31 KTA1298

5R 5C

5R

Q29

KTA1298

5T

5T

C84

471

R82

330K

5

OUT4VCC

PST9140NR

NC1VEE12VEE2

IC11

3

R282

4.7K

R299

*

171819202122232425262728293031

16

PABC

DEV2

15

DEV1

14

TO1

13

TO0

12

SHIFT

11

VCC

10

XIN

9

VSS

8

XOUT

7

RST

6

DNKEY

5

PTT

4

MODE

3

UPKEY

2

TOPKEY

1

64

TOPKEY

UPKEY

SCLK V

C54

471

SCL

SDA

R135

*

R134 *

R49

1K

R115

100K

5

6

SCL

SDA

4

MIC1

MIC

471

C55

J2

MIC JACK

105

DTC144EE

C400

R30

0R

L48

Q24

2SC4919

R33

820R

R221

D308

DAN222

100R

C176

C140

2.2uF/10V

D13

1SS372

C113

10P

C259

C101

104

R188 1.2K

33K

56K

R177

6

5

4

3

L19 BLM11A22 1S

V+

B-in

B+in

A+in

C258

681

C57

681

R219

18K

R192

392

C284

R176

56K
333
C283

68K
R245

GND

IC12

HT7150-1

OUT IN

C114

R139

10K

2SC1623

Q10

R159

D7

C56

471

C112

102

R187

2.2K

R138

10K

Q26

DTC144EE

C175

104

R186

2.2K

R137 10K

C174

104

10K

R136

R185

2.2K
Q27

DTC144EE

C173

104

5

*

C85 104

OUT1VDD2GND

IC13

3

R296

*

C123102

RESET

T2 MODE

T4 TXD

T5 RXD

T3

INT

MODE

TXD

RXD

RST

10K

R264

DEVC2

DEVC1

471

C315

TO1

TO0

BLM11A221S

SHIFT

10R

R101

VCC

XIN

VSS

13

XOUT

22P

C255

C256

22P

R47

1K

3P

C90

*

Q28

PTT

RST

MODE

DNKEY

SHIFT

MANDOWN

1K

R281

ST

VOUT

VDD

678

IC17

MANDOWN

123

4 5

CLKC1MODE

GND PGM

PTT

C61

471

C59

471

R216 220R

5M

R3025.6K

RXD

MUTE2

R50 1K

TXD

R3

R140

10K

C111

102

470R

BLM11A221S

R224

1.8K

C203

10uF/10V

C177

683

3.9K
C58

471

MUTE

R78

75K

683

182

R222

3.9K

R163

750K

683

223

C210

10uF/10V

C245

R53

39K

2

1

C178

104

A-in

Aout

14

C260

681

R83

*

15K

R178

56K

BATT

MUTE

AFCO

102

4.7uF/10V

C202

4.7K

HSC277

2T IN

SAVE

C312

*

C309*C311

*

R293

*

R289

5RC

R285

R284

*

5TC

C302 *

NC4NC

UPKEY

VCCS
T8

TOPKEY

R116

100K

BLM11A221S

L42

471

C316

PTT

L66

DNKEY

2

2

ECO1

X2

7.3MHz

ECO3

ECO2

ECO0

R283

10R

12345

6

C301

473

SCA60C

*

*

R287 *

R291 *

8

6

5

7

R290 *

V+

B-in

Bout

B+in

R295

*

Aout1A-in2A+in3GND

IC16 *

4

R294

C146

*

R286

*

C49

471

R80

100K

K4

C287

471

R249

100K

R172

27K

R223

2.7K

C159 103 C160 103 C161 103 C162 103

SW2

*

R288

*

C314

*

C313

*

R252

*

R253

*

R251

*

AF

PFI

K3

ALARM

C502

471

K1

PTT

471

C60

K2

MONI

47K

R22

47K
R21

47K

R20

47K

R19

ENCODER

6

1 of 1

PT4208-01(136~174MHz)

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Model Name:

REV:

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Prepare:

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2

1

A A

B B

40

C C

D D

PT4208 Service Manual

Figure 10 PT4208 Main Board Top Layer Position Mark Diagram (136-174MHz)

41

PT4208 Service Manual

Figure 11 PT4208 Main Board Bottom Layer Position Mark Diagram (136-174MHz)

42

PT4208 Service Manual

Figure 12 PT4208 Main Board Top Layer Position Value Diagram (136-174MHz)

43

PT4208 Service Manual

Figure 13 PT4208 Main Board Bottom Layer Position Value Diagram (136-174MHz)

44

PT4208 Service Manual

Figure 14 PT4208 Main Board Top Layer Layout (136-174MHz)

45

PT4208 Service Manual

Figure 15 PT4208 Main Board Bottom Layer Layout (136-174MHz)

46

PT4208 Service Manual

Figure 16 KBC-70C Schematic Circuit Diagram

47

PT4208 Service Manual

Figure 17 KBC-70C Top Layer Position Value Diagram

48

PT4208 Service Manual

Figure 18 KBC-70C Top Layer Position Mark Diagram

49

PT4208 Service Manual

Figure 19 KBC-70C Bottom Layer Position Value Diagram

50

PT4208 Service Manual

Figure 20 KBC-70C Bottom Layer Position Mark Diagram

51

PT4208 Service Manual

Figure 21 KBC-70C Layout

52