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PT568 Service Manual
Dangerous!
Do not connect the AC power or DC power over 8.6V with
any connector or terminal of the radio. Otherwise it will cause fire,
electric shock or damage to the radio.
Warning!
Do not reverse power connection.
It may cause harm to the radio if signal input on the antenna
connector is higher than 20 dBm (100mW).
Do not turn on the radio before the antenna or load connection
is completed.
If the antenna has been damaged, do not use the radio.
Damaged antenna may cause light burning on skin.
Though the radio is waterproof, it's better to avoid putting it in
rain or snow, or any other liquid to ensure its life and
performance.
Statement!
Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of
KSP568 software.
Unauthorized Duplication of KSP568 software is strictly
prohibited.
Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of
the MCU software code.
Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of
the radio outward appearance/structure/circuit design.
Kirisun Electronics (Shenzhen) Co., Ltd owns the copyright of
this service manual. Unauthorized publication is prohibited.
Kirisun Electronics (Shenzhen) Co., Ltd owns the trademarks
“KIRISUN”, “
”, “ ”, and “科立讯”.
Content
Chapter 1 Overview ................................................................... 2
Chapter 2 External View and Functional Keys........................... 2
Chapter 3 Circuit Description..................................................... 3
Chapter 4 Mode Introduction .....................................................8
Chapter 5 Disassembly for Repair............................................ 11
Chapter 6 Adjustment............................................................... 12
Chapter 7 Specifications........................................................... 15
Chapter 8 Troubleshooting ....................................................... 15
Chapter 9 KBC-70Q Charger ................................................... 17
Appendix 1 Abbreviations........................................................ 18
Appendix 2 Electronic Parts List.............................................. 18
Appendix 3 Structural Parts List .............................................. 22
Appendix 4 Accessories ........................................................... 23
Figure 1 PT568 Block Diagram................................................ 24
Figure 2 PT568 Schematic Circuit Diagram............................. 25
Figure 3 PT568 Top Layer Position Mark Diagram .................26
Figure 4 PT568 Bottom Layer Position Mark Diagram ........... 27
Figure 5 PT568 Top Layer Position Value Diagram................. 28
Figure 6 PT568 Bottom Layer Position Value Diagram ........... 29
1
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PT568 Service Manual
Chapter 1 Overview
1.1 Introduction
This manual applies to the service and maintenance of PT568
series of FM portable radios, and is intended for use by engineers
and professional technicians that have been trained by Kirisun. It
contains all required service information for the equipment.
Kirisun reserves the right to modify the product structure and
specifications without notice in order to improve product
performance and quality. You can also log on our website
www.kirisun.com
your local dealer or us.
Please read this manual carefully before repairing the product.
1.2 Service Attentions
* Safety
Do not touch the antenna connector or the PCB while
repairing the radio.
Do not reverse the battery polarity.
It may cause harm to the radio if signal input on the antenna
connector is higher than 20 dBm (100mW).
Do not turn on the radio before the antenna or load connection
is completed.
If the antenna has been damaged, do not use the radio.
Damaged antenna may cause light burning on skin.
* Electromagnetic Interference
It’s prohibited to use or repair the radio in the following
places:
Hospital, health center, airport
Any area with a potentially explosive atmosphere (e.g. orlop
deck of the ship, storage or transportation equipment for fuel and
chemical etc.)
Any place near blasting sites or area with electrical blasting
cap.
It’s recommended to avoid using or repairing the radio in the
following place:
It’s recommended to avoid using radios in a car that is moving
as the radio wave might interfere the auto engine and cause it to
stop working.
* Replacement Parts
All components used for repair should be supplied by Kirisun.
Components of the same type available on the market are not
surely able to be used in this product and we do not guarantee the
quality of the product using such components.
to download the latest service manual or contact
If you want to apply for any component from Kirisun, please
fill in an application form as below.
e.g.
Component Application Form
Radio
Component
Model
PT568-01 FET Q11 2SK3476 105-SK3476-R01 1
PT568-02 Triode Q57 2SC5108(Y) 104-SC5108-001 1
1.3 Service
All the Kirisun products are subject to the service warranty.
The main unit of the radio is guaranteed for free service of 12
months. Accessories (such as battery pack, antenna, charger and
power adapter etc.) are guaranteed for free service of 6 months.
However, in one of the following cases, charge free service will be
not available.
* No valid warranty card or original invoice.
* Malfunction caused by disassembling, repairing or
reconstructing the radio by the users without permission.
* Wear and tear or any man-made damage such as mechanical
damage, burning or water leaking.
* Product’s serial number has been damaged or the product
trademark is difficult to identify.
After the warranty expires, lifetime service is still available.
We also provide service components to service stations and staffs.
Position
Mark
Model/
Specifications
Part No. Qty
Chapter 2 External View and Functional Keys
2.1 External View
2.2 Functional Keys
① LED Indicator
Lights red while transmitting; lights green while receiving;
flashes red when the radio is in low power.
② Channel Selector Knob
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PT568 Service Manual
Rotate the knob to select channel 1-16.
③ On/Off/Volume Control Knob
Turn clockwise until you hear a click to turn the radio power
on. Turn counterclockwise until you hear a click to turn it off.
Rotate it to adjust the volume after turning on the radio.
④ PTT (Push-To-Talk) Button
Press and hold the PTT button and speak into the microphone,
your voice can be sent to the recipient. Release the PTT button to
receive.
⑤ Side Button 1 (programmable button)
⑥ Side Button 2 (programmable button)
⑦ Top Button (programmable button)
⑧ External Speaker/Microphone Jack Cover
Remove the cover; you will see the external
speaker/microphone jack. External speaker/microphone can be
connected to the radio through this jack.
Chapter 3 Circuit Description
3.1 Frequency Configuration
BUFFER
DATA FROM MCU
CLK FROM MCU
LE FROM MCU
PS FROM MCU
LOCK TO MCU
QT/DQT FROM MCU
CENTER FREQUENC Y ADJUST F ROM MCU
12.8MHz
PLL IC
5C
12.8MHz TO
TCXO
51.2MHz
5C
TXVCO
MODE
5C
NOISE
AMP
BUFFERRXVCO
RIPPLE
FILTER
DET COLL
5R
TA31136NOISE DETBUSY SIGNEL TO MCU
450KHz
+/- 7.5KHz
Figure 3.1 Frequency Configuration
The reference frequency of the frequency synthesizer is
provided by crystal oscillator X4 (TCXO, 12.8MHz). The receiver
adopts double mixing. The first IF is 51.65MHz and the second IF
is 450kHz. The first local oscillator signal of the receiver is
generated by the frequency synthesizer. The second local
oscillator signal adopts the fourth harmonics (51.2MHz) of the
crystal oscillator X4 (TCXO, 12.8MHz). Transmitter signal is
directly produced by the frequency synthesizer.
3.2 Principle of Receiver (RX)
5T5R
RF
AMP
5C
IF
AMP
5R
RF
TX/RX SW
AMP
5T
5C
51.65MHz
+/- 15KHz
MIXER
5R
Front end
The signal coming from the antenna passes through the
RX/TX switch circuit (D1, D2, D4 and D5), and passes through a
BPF comprises of C37, C227, L8, L15, C70, C126, D30, C218,
L9, C230, C128, D26, C217, L10, C229, C127 and D24 to
remove unwanted out-of-band signal, and is sent to the low noise
amplifier (LNA) consists of Q20 and its peripheral components to
be amplified.
Output signal from the LNA passes through a BPF comprises
of L7, C228, C47, D23, C219, L6, C182, C124, D22, C216, L5,
C132, C32 and D21 and goes to the first mixer (Q19).
PWM wave is output from pin 12 of the MCU. The wave is
filtered and rectified into adjustable voltage, which can control the
center frequency of the band pass filter through changing capacity
of the varactor diodes (D21, D22, D23, D24, D26 and D30).
First mixer
The received signal from LNA is mixed with the first local
oscillator signal from the frequency synthesizer to produce the
first IF signal (51.65MHz). Then the first IF signal passes through
crystal filter (XF1 and XF2) to remove the adjacent channel signal
and signal outside the adjacent channel.
IF circuit
The first IF signal from the crystal filter is amplified by the
first IF amplifier (Q21), and is sent to the IF processing IC (IC5,
TA31136).
IF IC consists of second mixer, second local oscillator, IF
amplifier, limiter, discriminator, and noise amplifier.
The 12.8MHz frequency produced by TCXO (X4) is
multiple-amplified and then the fourth harmonics (51.2MHz) is
adopted as the second local oscillator signal source. The second
local oscillator signal (51. 2MHz) is mixed with the first IF signal
(51.65MHz) in IC5 to generate the second IF (450kHz). And then
the second IF signal is amplified and limited in IC5, filtered by the
ceramic filter (CF1, 450kHz), and demodulated in IC5 to output
audio signal.
Figure 3.2 Principle of Receiver
3
Figure 3.3 IF System
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PT568 Service Manual
Audio signal processing
The voice signal processing circuit of the receiver consists of
IC6 and its peripheral circuits. After being amplified in IC6-C,
voice signal from IC5 is sent to IC4 (CTCSS signal filtering
circuit) and IC6-D respectively. The signal is then amplified,
deemphasized and filtered by other units of IC6 to remove HF and
LF components contained in the audio frequency, with only voice
components within 300~3000Hz left. The resulting signal is then
sent to Q9 for amplification. The amplified signal is adjusted by
the volume potentiometer and then is sent to the audio power
amplifier (IC8).
Figure 3.4 Audio Processing of Receiver
Squelch circuit
The demodulated signal from IC5 goes to the selective noise
amplifier consists of internal noise amplifier of IC5, C211, R99,
R100, C107 and R94 to remove the noise component. The
resulting signal is then amplified by Q7 and demodulated by D17
and is sent to the MCU. MCU identifies level of the noise and
controls the squelch.
Audio power amplifier
The audio power amplifier circuit consists of IC8 and its
peripheral components.
The received audio signal, voice alert signal, alert tone signal
and warning tone signal are collected and pass through the audio
amplifier where they are amplified and output to drive the speaker.
The volume of the warning tone is not controlled by the preset
volume level of the radio.
When AFCO is in high level, Q35 turns on, IC8 starts to
operate, and the speaker makes sound. Speaker impedance: 16.
Q38: Receiving audio signal switch
Q51: Warning tone switch
Q25: Alert tone switch
CTCSS/DCS signal filtering
Audio signal demodulated by IC5 may contain CTCSS
(Continuous Tone Control Squelch System) or DCS (Digital Code
Squelch) signal. The spectrum components of CTCSS/DCS are
within 2-250Hz. The filtering circuit consists of IC4 can remove
signals outside the CTCSS/DCS spectrum, which enables the
MCU to decode CTCSS/DCS more accurately.
3.3 Principle of Tr ansmitter (TX)
TX power amplification
Figure 3.5 Principle of Power Amplifier and Antenna Switch
The modulated RF signal from VCO is amplified by Q2, Q3
and Q12, and is sent to Q11 for power amplification.
Grid bias of Q11 and Q12 is controlled by the APC circuit.
Through changing the grid bias voltage, the Tx output power can
be controlled conveniently.
APC (Automatic Power Control)
Figure 3.6 APC Circuit
R167, R168 and R169 are used to test the power amplification
current. IC3A is the sampling amplifier for the power
amplification current. IC3B is the power comparator amplifier.
If the Tx output power is too high, the power amplification
current and IC3A output will increase; IC3B output voltage will
decrease, so the bias voltage of Q11 and Q12 will also decrease,
which causes the Tx output power to be lowered, and vice versa.
Thus the Tx output power can keep stable under different working
conditions.
MCU can set the power through changing the voltage input to
IC3B.
Tx voice signal processing
MIC Amp
MIC
IC7A
Pre-Emphasis
MCU
CTCSS/DCS
IC7B
IC7C,IC7D
Figure 3.7 Transmitter Audio Circuit
4
VCO
TCXO
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PT568 Service Manual
The Tx voice signal processing circuit consists of IC7 and its
peripheral components. After being amplified, limited and filtered,
the voice signal from MIC is sent to VCO for modulation together
with CTCSS/DCS signal.
The AGC circuit consists of D13, D308 and Q24. When signal
from MIC is too large, the AGC circuit will lower the signal
strength to make sure that no distortion happens to the signal.
Q34 is the power switch of the voice processing circuit. It is
controlled by MCU. Power supply of IC7 will be turned on when
the radio is transmitting.
J2 is the jack for external MIC. When using external MIC, the
internal MIC will be turned off automatically. But the internal
PTT is still effective.
3.4 Principle of Frequency Synthesizer
Data
CK
to MCU
LE
DCS Mod
TCXO
Freq Adj
to MCU VCCN
The radio adopts PLL type frequency synthesizer.
The frequency synthesizer consists of reference oscillator,
voltage control oscillator (VCO), programmable divider, phase
comparator, and low pass filter.
Rx VCO unit consists of Q14, L30, C120, C88, C142, C180,
D8 and D9. Tx VCO unit consists of Q15, L51, C121, C137,
C206, C194, D10 and D11. D12 is the modulation circuit of VCO.
IC1 (MB15E03) is PLL integrated circuit, which consists of
programmable reference divider, programmable swallowing
divider, phase comparator, and charge pump.
The low pass filter consists of R244, C193, R202, R40, C207,
R141, C205, R2 and C204. The reference frequency is provided
by X4 (TCXO, 12.8MHz).
The reference frequency from TCXO (Temperature
Compensated Crystal Oscillator) is divided by the programmable
reference divider in IC1 to produce reference frequency of 5kHz
or 6.25kHz (determined by the preset channel frequency and is
controlled by MCU).
The oscillation frequency from VCO goes to IC1 where it is
divided by the programmable swallowing divider and is then
compared with the reference frequency to obtain error signal. The
signal is then filtered by a low pass filter and is sent to VCO to
change the oscillation frequency of the VCO, enabling the
frequency to reach the set value. Then the VCO is locked.
1
N
Detect
Charge
Pump
UL
VCO
MOD in
Control Circuit
1
Nr
Figure 3.8 Frequency Synthesizer
Q5
Q4
D3,D6
TX
RX
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 low level signal to MCU. Then MCU prohibits the
transmitter from transmitting and makes an alert tone.
Q6: Power filter, which provides more purified power for PLL
to reduce noise of the frequency synthesizer.
3.5 Voice Alert Circuit
The radio is provided with voice alert function, which is
especially useful at night or in dark environment.
IC15 is a voice memory chip, which is stored with voices of
channel indication etc. Once the channel selector knob is switched,
the speaker will announce the current channel number. You can
press the preprogrammed “Voice Alert” key to repeat the current
channel number.
If voice alert function is enabled, the speaker will announce
the current channel number once the “Voice Alert” key is pressed
under standby mode. You can switch the voice type by pressing
and holding the “Voice Alert” key while restarting the radio. Do it
repeatedly to switch the voice type in the order of “Chinese
Male-English Male-Chinese Female-English Female-No Alert”.
3.6 Power Supply
The radio uses 7.4V, 1700mAh Li battery. The Tx power
amplification circuit (Q11 and Q12) and the Rx audio power
amplifier (IC8) directly adopt the battery for power supply. Power
of other circuits is supplied by 5V regulated voltage.
IC12: 5V low dropout, micro-power regulator, which supplies
5V power with large current for the radio together with Q10 and
Q30.
Q29: 5T switch, which is controlled by MCU.
5T: Supplies power for front end of Tx.
Q31: 5R switch, which is controlled by MCU.
5R: Supplies power for RF amplifier, mixer, IF processing unit,
and audio signal processing unit etc. of the receiver.
Q32: 5C switch, which is controlled by MCU.
5C: 5V power supply under SAVE control. Supplies power for
frequency synthesizer.
3.7 MCU Unit
5
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PT568 Service Manual
to PLL
APC CONTR
D/A
5TC
5RC
SAVE
IC9
EEPROM
chananl
SW
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 function setting data, and parameter adjusting data.
CTCSS/DCS signal encoding and decoding:
The CTCSS/DCS signal (output from pin 12) generated by
MCU is filtered by R155, R156, C242 and C243. Then the
resulting signal is divided into two parts and sent to VCO and
TCXO respectively for modulation.
The CTCSS/DCS signal from the receiver is sent to MCU (pin
49) for decoding. MCU checks if the CTCSS/DCS signal in the
received signal matches the preset value of the radio, and
determines whether to open the speaker or not.
Power adjustment:
Output from pin 42 of the MCU passes through integrating
filter (R161, C317, R206, and C318), and is sent to the APC unit
to control the output power of the transmitter.
RXD
to PC
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
CTCSS
CTCSS (Continuous Tone Control Squelch System) is a
squelch control system which is modulated on carrier and is
guided by a continuous sub-audio signal. If CTCSS is set, the
communication between the transmitting and receiving radios can
be realized only when the two radios have set the same CTCSS
frequency. In doing this, disturbance from other signals can be
avoided.
PT568 has 39 groups of standard CTCSS frequencies for your
selection. See table 3.1.
The CTCSS signal is generated by MCU, and is passed
through low pass filter consists of RC to remove high frequency
components (above 300Hz). Then the resulting signal is sent to
VCO for modulation.
Table 3.1 CTCSS Frequencies
No. Frequency
1 67.0 11 94.8 21 131.8 31 186.2
2 69.3 12 97.4 22 136.5 32 192.8
3 71.9 13 100.0 23 141.3 33 203.5
4 74.4 14 103.5 24 146.2 34 210.7
5 77.0 15 107.2 25 151.4 35 218.1
6 79.7 16 110.9 26 156.7 36 225.7
7 82.5 17 114.8 27 162.2 37 233.6
8 85.4 18 118.8 28 167.9 38 241.8
9 88.5 19 123.0 29 173.8 39 250.3
10 91.5 20 127.3 30 179.9
[Hz]
No. Frequency
[Hz]
No. Frequency
[Hz]
No. Frequency
DCS
DCS (Digital Code Squelch), which is used to control squelch,
is a series of continuous digital codes modulated on carrier
together with voice signal. If DCS is set, the speaker can be
opened only when the radio receives signal with the same DCS to
avoid disturbance of unwanted signals.
PT568 has 83 standard codes (inverted and non-inverted) for
your selection. See table 3.2.
DCS signal is produced by MCU (in waveform of PWM). It
passes through the low pass filter consists of RC to remove the
high frequency components (above 300Hz). Then the resulting
signal is sent to VCO and TCXO for modulation, with HF
components of the DCS signal being modulated by VCO, and the
LF components of the DCS signal being modulated by TCXO.
The DCS signal coming from the receiver is sent to MCU for
decoding. MCU checks if the DCS code in the received signal
matches the preset DCS of the radio, and determines whether to
open the speaker or not.
6
[Hz]
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PT568 Service Manual
Table 3.2 DCS Codes
023 114 174 315 445 631
025 115 205 331 464 632
026 116 223 343 465 654
031 125 226 346 466 662
032 131 243 351 503 664
043 132 244 364 506 703
047 134 245 365 516 712
051 143 251 371 532 723
054 152 261 411 546 731
065 155 263 412 565 732
071 156 265 413 606 734
072 162 271 423 612 743
073 165 306 431 624 754
074 172 311 432 627
3.8 Semiconductor Data
Refer to table 3.3 for descriptions of each pin.
Table 3.3 Definition of CPU Pins
No. Port name
1 NC NC
2 AFCO2 P35 O Audio frequency switch 2
3 GLED P33 O Green LED switch
4 PTT P34 I [PTT] input
5 MODE I
6 VDEVC2 P43 O VHF deviation switch 2
7 VDEVC1 P44 O VHF deviation switch 1
8 RST I Reset input, programming test point
9 XOUT O
10 VSS I GND, programming test point
11 XIN I Oscillator (7.3MHz)
12 VCC I 5V CPU power input, programming test point
13 SHIFT P27 O Clock beat shift. H: On
14 VCCN P26 O(PWM) Frequency stability output
15 TO P25 O(PWM) QT/DQT output
16 WNTC P24 O
17 APC P23 O(PWM) TX: Automatic power control output, RX: 0
18 TUNE P22 O(PWM) TX: 0 RX: BPF tuning output
19 BEEP P21 O(PWM) BEEP/DTMF output
20 SDA P20 I/O EEPROM data line
21 ENC0 P17 I Encoder input
22 ENC2 P16 I Encoder input
23 ENC3 P15 I Encoder input
24 ENC1 P14 I Encoder input
25 SCL P13 O EEPROM clock line
26 NC NC
27 UL P45 I
28 TXD P66 O RS-232C output, programming test point
Pin
Name
I/O Function
Connect the 4.7K resistor with VCC,
programming test point
Wideband/Narrowband control
H: Wideband, L: Narrowband
PLL circuit unlock detect pin
H: locked, L: unlocked
29 RXD P67 I RS-232C input, programming test point
30 CK P12 O PLL clock output
31 DT P11 O PLL data output
32 LE P10 O PLL IC enable pin, H: locked
33 RX P31 O Receiving enable
34 BUSY_V P30 O Busy signal of voice annunciation IC
35 DATA_V P65 O Data of voice annunciation IC
36 SCLK_V P64 O Clock of voice annunciation IC
37 RLED P63 O Red LED control, H: On
38 NC P07 I(A/D0)
39 NC NC
40 NC NC
41 TI P06 I(A/D1) QT/DQT signal input
42 BUSY P05 I(A/D2) Busy signal input
43 BATT P04 I(A/D3) Battery voltage detect
44 VREF I Connect with VCC
45 SAVE P60 O
46 MUTE P62 O Mute control H: Mic mute L: audio mute
47 5RC P61 O Receiving power control L: On
48 KEYIN P03 I(A/D4) Programmable key P1, P2, P3 detect
49 5TC P02 O Transmitting power control, H: On
50 RLED P01 O Red LED switch
51 AC P00 O
52 AFCO1 P37 I Audio control switch 1
Connect the pull-up resistor with VCC, and
connect the pull-down resistor with VSS
Battery saving control, H: supply power, L:
power saving
Alarm switch control, H: controlled by volume
switch
Radio should be in low level in emergency
alarm
Table 3.4 Function Description of Semiconductor Components
Position
Mark
IC1 MB15E03 Frequency synthesizer
IC4 NJM2904 APC, voltage comparison, driving
IC5 TA31136 Rx second local oscillation, second IF
IC6 NJM2902 Amplification and filtering of demodulation
IC7 NJM2902 MIC amplification, limitation and filtering
IC8 TDA8541 Audio frequency power amplification of receiver
IC9 AT24C08 E2PROM, memorizes channel frequency data,
IC10 R5F212A8 MCU
IC11 PST9140NR MCU reset circuit
IC12 HT7150-1 LDO, low-power voltage regulator
IC15 W588A080 Voice storage IC
Q2 2SC5108 First amplification of transmitter
Q3 2SC3356 Second amplification of transmitter
Q4 2SC5108 VCO buffer amplifier
Q5 2SC5108 VCO buffer amplifier
Q6 2SC4617 VCO power supply filter
Q7 2SC4738 Noise amplifier
Q9 2SC4617 Audio frequency signal amplification of receiver
Q10 2SC1623 5V voltage regulation output current stretching
Q11 2SK3476 Transmitter final power amplification
Q12 RD01MUS1 Transmitter power amplification driving
Q17 DTA144EE APC output switch
Q19 3SK318 First mixer
Q20 3SK318 Receiver high power amplifier
Model Function Description
amplification, limitation, demodulation, and
noise amplification
signal of receiver.
function setting parameters and adjusting status
parameters
7
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PT568 Service Manual
Q21 KTC4082 1st IF Amplifier
Q22 DTC144EE Red LED Driving
Q23 DTC144EE Green LED Driving
Q24 2SK1824 Voice alert switch
Q26 DTC144EE 5C switch
Q29 KTA1298 5T switch
Q30 KTA1298 5V voltage regulation output current stretching
Q31 KTA1298 5R switch
Q32 KTA1298 5C switch
Q34 DTA144EE Power switch of MIC amplification unit
Q35 2SK1824 Receiver audio output switch. Disconnect on
Emergency
Q36 2SK1824 Receiver audio output switch
Table 3.5 Function Description of Diodes
Position
Mark
D1 MA77 Transmitter antenna switch diode
D2 HVC131 Transmitter antenna switch diode
D3 HSC277 VCO output switch
D4 HVC131 Antenna toggle switch
D5 HVC131 Antenna toggle switch
D6 HSC277 VCO output switch
D7 HSC277 5V voltage regulation output current stretching
D8 HVC376B VCO oscillation varactor diode
D9 HVC376B VCO oscillation varactor diode
D12 MA360 VCO modulation diode
D14 HZU5ALL APC output voltage-limiting diode
D15 MA2S111 Unlock detection diode
D16 MA2S111 VCO power filtering acceleration diode
D17 1N4148 Noise demodulation
D18 1N4148 Noise demodulation
D20 Green LED Receiving indicator
D25 MA2S111 APC single diode
D28 Red LED Transmitting indicator
D29 Green LED Receiving indicator
Nominal center frequency 51.65MHz
Pass band width ±7.5kHz or higher
40dB stop band width ±20.0kHz or lower
Pulse within band 1.0dB or lower
Insertion loss 3.0dB or lower
Guarantee attenuation 80dB or higher
Terminal impedance 1.2k
Nominal center frequency 450kHz
6dB band width ±6kHz or higher
50dB band width ±12.5kHz or lower
Pulse 2.0dB or lower
Insertion loss 6.0dB or lower
Guarantee attenuation 35.0db or higher
Terminal impedance 2.0k
Table 3.8 Schematic Diagram for Packaging of Semiconductor
Model Function Description
Table 3.6 Features of Crystal Filter XF1, XF2
Item Rated Value
Table 3.7 Features of CF1 LTVPC450EB
Item Rated Value
Devices
B
E
B
E
RD01MUS1
GSD
2SC5108
M: MC
KTA1298
2SC3356
M: R24
B
C
E
FMMT591
B
E
RD07MVS1
RDA0002
S
2SC4617
B
C
E
DTC144EE
M:16
B
C
E
HT7150-1
D
S
GNDINOUT
G
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
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
4.1 User Mode
You can enter User Mode (conventional communication mode)
by turning the radio power ON. Under this mode, users can use
the defined functions of the radio.
4.2 Data Programming Mode
The radio has been set before leaving the factory. However,
due to different requirements of users, the radio’s operating
frequencies, channels, CTCSS/DCS, scan, and other functional
parameters should be reprogrammed. Therefore, Kirisun has
specially designed a set of Chinese/English programming software
KSP568 with friendly interface, convenient operation and
visualized display for setting functional parameters of the radio.
Steps for setting the functional parameters of the radio by PC
are as follows:
A. Install KSP568 on the computer.
B. Connect the radio to the serial port of the PC with the
special programming cable (KSPL-09). Refer to the
figure below.
8
Used to read and write
frequency data and
other features to and
Received commands
from PC.
from the radio
Tune the radio
parameters by PC
Received commands
from PC.
Press and hold the top
Upgrade the radio
when new features are
released
key for over 2 seconds
while turning the radio
power ON, and received
commands from PC
Used to transfer
programming data
from one radio to
another
Press and hold side key 1
for over 2 seconds while
turning the radio power
ON
C
S
D
3
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PT568 Service Manual
p
p
b
b
Computer
(RS232 serial port)
Programming
cable
Figure 4.1
C. Turn the computer power ON.
D. Turn the radio power ON.
E. Run the KSP568 programming software by double
clicking on its executive program.
F. Click “Program” in the main menu of KSP568, and click
“Read from radio” in the pull-down menu to read
parameters of the radio to the computer; click “Write to
radio” in the pull-down menu to write parameters in the
computer to the radio.
G. The following parameters can be set by using KSP568
according to requirements of the user:
Radio Information:
Radio Model (model/frequency range), Serial Number,
Embedded Information, MCU Version, Hardware Version, etc.
Radio Parameters:
1) Key Assignment: P1, P2, P3 can be set as long/short key and
the hold time can be defined.
No. Function Description
0 None No function is assigned.
Voice
1
Annunciation
2 Talk Around
3 Lone Worker
Emergency
4
Alarm
Emergency
5
Alarm Off
6 Scan
Nuisance
7
Delete(tempo
rary)
High/Low
8
Power Switch
Momentary
9
Monitor
Press the preprogrammed “Voice Annunciation” button to
change the language and mode of voice annunciation.
Meanwhile, the current channel number can be heard.
When the preprogrammed “Talk Around” button is
ressed, the next transmission will be at the same
frequency as at which it is received.
Press the preprogrammed “Lone Worker” button to
start/stop lone working.
Press the preprogrammed “Emergency Alarm” button to
make warning tone according to the setting of the
rogramming software or send your ID or background
sound to your partner or the system. (This function can
only be assigned to the TOP KEY)
Press the preprogrammed “Emergency Alarm Off” button
to quit the Emergency Alarm Mode. (This function can
only be assigned to the TOP KEY, and should be used
together with Emergency Alarm function)
Press the preprogrammed “Scan” button to start/stop
scanning.
If the radio stays at a noise channel while scanning, press
the preprogrammed “Nuisance Delete” button to delete the
nuisance channel temporarily.
Press the preprogrammed “High/Low Power Switch”
utton to switch between high and low transmitting power
of the radio.
Press and hold the preprogrammed “Momentary Monitor”
utton to disable CTCSS, DCS signalling, and release the
button to resume normal operation.
Radio
(Earphone/Program
ming interface)
Press the preprogrammed “Monitor” button to disable
10 Monitor
Momentary
11
Squelch Off
12 Squelch Off
Lone Worker
13
Reset
14 FCS Press to start free channel scanning (FCS).
CTCSS, DCS signalling, and you can receive signals that
cannot be heard under normal operation. Press it again to
resume normal operation.
Press and hold the preprogrammed “Momentary Squelch
Off” button to open squelch; release it to resume normal
operation
Press the preprogrammed “Squelch Off” button to open
squelch. Press it again to resume normal operation.
Press the preprogrammed “Lone Worker Reset” button
while the radio is in Lone Worker Mode to reset the lone
worker timer, and the timer starts again.
2) Optional Functions
1. Wired Clone enable
2. All Low Power Switch
3. Firmware Programming Mode enable
4. Beep Tone
5. All Low Power
6. Voice Annunciation Setting
7. Battery Save
8. TOT
9. TOT Reset Time
10. TOT Pre-alert
11. TOT Rekey Time
12. Squelch Level Selection
3) Embedded Information
1. Password of Read Radio
2. Password of Write Radio
3. Embedded Information Setting
4) Scan
Scan function setting: Priority Channel selection, Revert
Channel selection, Tx Dwell Time, Dropout Delay Time,
Lookback Time.
FCS function setting: Automatic Tx Time, Automatic Rx Time,
FCS Resume Time, Scanning Times.
5) Emergency Setting
Press the preprogrammed “Emergency Alarm” button (the
hold time should be longer than the debounce time of the
emergency alarm switch) to enter Emergency Alarm Mode. The
radio can make warning tone according to the setting of the
programming software, or send the background sound to your
partner or the system.
Press the preprogrammed “Emergency Alarm Off” button to
9
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PT568 Service Manual
quit Emergency Alarm Mode, the radio stops making alert, or
stops sending background sound and resumes normal operation.
Channel Information
1) Receiving and transmitting frequencies of each channel
(frequency step: 2.5kHz/5kHz/6.25kHz).
2) Receiving and transmitting signalling of each channel.
a) None
b) CTCSS (67~254.1Hz@0.1Hz step)
c) DCS (-777~777@octal number)
3) Busy Channel Lockout (BCL)
4) Clock Beat Shift
5) Channel Spacing Selection: 25kHz/12.5kHz (W/N)
6) Scan Add/Delete
7) FCS Channel Add/Delete
8) Tx Power Selection: High/Low
9) QT Reverse
Please refer to the “Help” document of KSP568 for details.
Note:
1. Firstly, please read data of the radio and back up the data before
editing the parameters on KSP568.
2. If the radio cannot function normally after being written in with
the edited data, please rewrite the backup data into the radio.
3. “Model Information” is important for the radio; users should
not modify it.
4.3 PC Test Mode
Connect the radio to the serial port of the computer with the
special programming cable. Please refer to Figure 4.1.
Warning: Non-professionals should not enter PC Test Mode;
otherwise, the radio may be damaged. Before entering the PC Test
Mode, please firstly connect a 50 high frequency load to the
antenna connector of the radio or connect the radio to a general
test set.
In the programming software, enter the Tuning Mode under
the PC Test Mode to tune the following parameters of the radio:
1) Frequency Stability (6250Hz and 2500Hz)
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) Tx Low Voltage
4.4 Firmware Programming Mode
The radio is in possession with an internal Flash ROM which
can be upgraded when new features are released.
Procedure:
1. Press and hold the Top Key for over 2 seconds while turning the
radio power ON. The LED will light orange and the radio enters
the Firmware Programming Mode.
2. Run the firmware programming software KMU on PC.
3. Connect the radio to the computer by the programming cable.
4. Select a COM port and load the firmware upgrading file. Then
click on “E.P” to start downloading.
5. If the communication ends successfully, turn the radio power
OFF to exit.
6. If you want to continue programming other radios, repeat steps
1 to 5.
4.5 Wired Clone Mode
If the wired clone function is enabled, the radio can enter the
Wired Clone Mode. After entering this mode, the radio will not
exit automatically. The user needs to restart the radio if he wants
the radio to return to the User Mode.
The operation procedure is as follows:
1. Press and hold Side Key 1 while turning the radio power ON to
enter the Wired Clone Mode. If the wired clone function is
disabled, the radio will enter User Mode.
2. Connect the slave radio to the master radio by the cloning cable
(KCL-01) and turn on the power of the slave radio.
3. Press Side Key 2 of the master radio to start cloning. The LED
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PT568 Service Manual
on the master radio will light red, and the data of the master is sent
to the slave. While the slave is receiving the data, the LED lights
green. When cloning of data is completed, the LED of the master
will go out, and the slave will restart automatically.
4. Carry out the operation in step 3 to clone other slave radios.
Note: The user can enable or disable the wired clone function
through PC programming software. Once the wired clone function
is disabled, the radio cannot enter the Wired Clone Mode.
Chapter 5 Disassembly for Repair
The radio is a piece of precision communication equipment.
Please be careful when disassemble the radio during service. The
instructions for the disassembly are as follows.
5.1 Attaching and Removing the Battery
1) Attaching the Battery
Match the two holes of the belt clip with those on the rear of
the radio, and then fix the belt clip to the radio using the two
supplied 2.5*8 .0 screws. Loose the fixing screws to remove the
belt clip.
5.3 Removing the chassis from the front cabinet
1. Pull out the volume knob and the channel selector knob, and
remove the antenna;
2. Remove the two nuts for knobs and the nut for the antenna
connector by the special tool;
3. Remove the two fixing screws at the lower part of the Al
chassis by a hexagonal screwdriver;
4. Insert a flat-blade screwdriver into the slot at the bottom of the
Al chassis, and prize it up. Then pull the Al chassis backwards to
remove it from the front cabinet. Be careful not to break the
speaker wire.
5. Remove the solder of the speaker wire with a soldering iron.
Then you can remove the chassis from the front cabinet.
See figure below:
Fit the two extensions at the top of the battery into the slots at
the top of the radio’s body.
Press the bottom part of the battery towards the radio until a
click is heard and the battery is hooked.
2) Removing the Battery
Push the battery latch at the bottom of the radio forward, the
bottom part of the battery will bounce up automatically. Then
release the belt clip and remove the battery from the radio’s body.
Note:
* Do not short-circuit the battery terminals or dispose battery
in fire.
* Do not disassemble the battery casing by yourself.
5.2 Installing/Removing the belt clip
5.4 Removing the mainboard from the Al chassis
1. Remove the top waterproof gasket and the top gasket;
2. Remove the screws on the PCB by a cross screwdriver;
3. Remove the solder of the antenna connector with a soldering
iron, and remove the mainboard.
See figure below:
After the aforesaid disassembly, you can repair and adjust the
radio according to its actual malfunction.
11
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PT568 Service Manual
5.5 Exploded View
No. Name Part No. PCS
1 PT568 Front Casing 201-000568-R02C 1
2 PT568 Light Guide 201-000568-R09A 1
3 PT568 Logo 401-0201E1-R97B 1
4 PT568 PTT Cover 201-000568-R05C 1
5 PT568 PTT Key 202-000568-R02A 1
6 PT568 Speaker Cover 201-000568-R03B 1
7 PT568 Metal Speaker Net 203-000568-R09C 1
8 PT568 Battery Hook 2 203-000568-R05C 1
9 PT568 Battery Hook 1 203-000568-R04C 1
10 PT568 Spring Sheet 2 for Battery Latch 203-000568-R07A 1
11 PT568 Spring Sheet 1 for Battery Latch 203-000568-R06A 1
12 PT568 Battery Latch 201-000568-R14A 1
13 M2.0*4.0 Screws 301-20040G-R01B 11
14 PT568 Mainboard 602-005682-R01 1
15 PT568 Al Alloy Chassis 203-000568-R02B 1
16 M2.0*8.0 Screws 301-20080G-R02B 2
17 PT568 Earphone Jack Bracket 201-000568-R11A 1
18 PT568 Main Waterproof Loop 202-000568-R01A 1
19 PT568 Bracket Waterproof Washer 202-000568-R05A 1
20 PT568 Battery Connector 201-000568-R13A 1
21 M2.5*8.0 Screws 301-25080J-R01 2
22 PT568 Top Cover 201-000568-R04B 1
23 PT558 Antenna Connector 203-000558-R07B 1
24 M2.0*4.0 Screws 301-20040G-R01B 2
25 PT558 Nut for Antenna 203-000558-R14A 1
26 PT558 Nut for Knob 203-000558-R13A 2
27 PT568 Volume Knob 201-000568-R06A 1
28 PT568 Channel Selector Knob 201-000568-R07A 1
29 PT568 Top Waterproof Gasket 202-000568-R04A 1
30 PT568 Top Gasket 203-000568-R08A 1
31 PT558 MIC Seal 202-000558-R09 1
32 Speaker 121-100000-R20 1
33 PT568 Earphone Jack Cover 201-000568-R10B 1
34 PT558 Waterproof Net for Speaker 204-000558-R01 1
35 PT568 Waterproof Gasket for MIC Head 204-000568-R01A 2
36 PT568 Emergency Button 202-000568-R03A 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 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 PT568.
Table 6.1 Equipment and Software Required for Test and
Adjustment
No. Item Specifications
1 Computer
2 Programming software KSP568
3 Programming cable
4 Clone cable KCL01
5 DC regulated power supply
6 RF power meter
7 Frequency counter
8 Deviation meter
9 DMM
10 Audio signal generator
11 RF power attenuator
12 Standard signal generator
13 Oscilloscope
14 Audio frequency voltmeter Test range: 10mV-10V
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
Output voltage: 7.5V
Output current: 5A
Measurement range: 0.5-10W
Frequency range: 100MHz-500MHz
Impedance: 50
SWR 1.2
Frequency range: 0.1 - 600MHz
Frequency accuracy: better than ±1×10-6
Sensitivity: better than 100mV
Frequency range: DC - 600MHz
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 than 10W
Frequency range: 10MHz-1000MHz
Output level:
0.1uV-32mV (-127dBm~-17dBm)
Frequency range: DC~20MHz
Test range: 10mV-20V
12
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PT568 Service Manual
Figure 6.1 External Speaker/Microphone Interface Definition
6.2 Adjustment
After changing components during the maintenance, it is
necessary to test the radio and adjust its technical parameters. The
following part is going to introduce the adjustment items.
Some parameters can be adjusted by use of KSP568
programming software (in the Tuning Mode). The adjustable
parameters are as follows:
1) 6250Hz Precision
2) 2500Hz Precision
3) Tx Power
4) Tx Low Voltage
5) Squelch Level
6) QT Deviation
7) DCS Deviation
8) Rx Sensitivity
Steps for adjustment:
a. Enter PC Test Mode. Refer to Section 4.2.1.
b. Click “Edit” in the main menu of KSP568 programming
software, and then click “Entry Tuning” in the pull-down menu to
enter the Tuning Mode.
c. Then the “Tuning Item List” screen will pop up. Double
click the item you want to adjust, and then you can adjust the
parameters.
d. Exit the PC Test Mode after adjustment.
6.3 Adjustment
6.3.1 VCO
Disable the “Battery Save” function, and set the Rx frequency
at the high frequency point (see Table 6.2). Under the receiving
status, measure the voltage of PD by DMM. Then adjust the PD
voltage to be 4.0V±0.2V by tuning the trimming capacitor C180.
Set the Tx frequency at the low frequency point (see Table
6.2), and press the PTT button. Then measure the voltage of PD
by DMM. The resulting voltage should be higher than 0.5V.
Table 6.2 High/Center/Low Frequency Point for PT568
Low Freq Point Center Freq Point High Freq Point
PT568(1) 136.125 MHz 145.125 MHz 173.975 MHz
PT568(2) 400.125MHz 425.125MHz 449.975MHz
PT568(3) 420.125MHz 445.125MHz 469.975MHz
6.3.2 PLL frequency
1. In the Tuning Mode, double click “6250Hz precision” to
enter. Adjust the parameter among 0-255 to make the Tx
frequency at the rated value (error within ±200Hz).
2. In the Tuning Mode, double click “2500Hz precision” to
enter. Adjust the parameter among 0-255 to make the Tx
frequency at the rated value (error within ±200Hz).
6.3.3 Tx Power
In the Tuning Mode, double click Tx “High power” to enter.
Adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” among 0-255 to make the Tx power at 4W.
Meanwhile, observe the operating current, and make sure that the
current 1.8A.
In the Tuning Mode, double click Tx “Low power” to enter.
Adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” among 0-255 to make the Tx power higher
than 0.5W.
6.3.4 Tx Low Voltage
Firstly, adjust the power voltage to be 6.8V. Double click “Tx
low voltage” in the Tuning Mode to enter. The software will test
automatically. When the value changes no more or only changes a
little, click SAVE to exit.
6.3.5 Deviation
Input audio signal (120mV, 1000Hz) to the MIC jack of the
radio. Adjust the potentiometer VR2 to make the Tx deviation at ±
4.2kHz.
6.3.6 DCS Tx Signal Waveform and Deviation
In the Tuning Mode, double click “DCS DEV” to enter. Adjust
the potentiometer VR1 and observe the demodulation signal (the
waveform should be smooth and similar to square wave). Click
wideband, and adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High”, and “Highest” to make the deviation at
0.75kHz. Then click narrowband, and adjust the value to make the
deviation at 0.35kHz.
6.3.7 CTCSS Deviation
In the Tuning Mode, double click “QT (67.0) DEV” to enter.
Click wideband, and adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High”, and “Highest” to make the deviation at
13
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PT568 Service Manual
0.75kHz. Then click narrowband, and adjust the value to make the
deviation at 0.35kHz.
In the Tuning Mode, double click “QT(151.4) DEV” to enter.
The tuning method is the same as that of “QT(67.0) DEV”.
In the Tuning Mode, double click “QT(254.1) DEV” to enter.
The tuning method is the same as that of “QT(67.0) DEV”.
6.3.8 Receiver Sensitivity
In the Tuning Mode, double click “Sensitivity” to enter. Adjust
the five frequency points of “Lowest”, “Low”, “Mid”, “High”,
and “Highest” among 0-255 to make the sensitivity be the highest.
6.3.9 Receiver Squelch
In the Tuning Mode, double click “SQL9 On” to enter. Click
wideband and use the following method to adjust the five
frequency points of “Lowest”, “Low”, “Mid”, “High”, and
“Highest” respectively. Firstly, click one of the frequency points,
and adjust the RF signal frequency of the test equipment to be the
same with the receiving frequency of that frequency point, and
adjust the signal level to be -116dBm. Then adjust the frequency
of the modulation signal to be 1kHz and the deviation to be 3kHz.
The programming software will adjust the value automatically.
When the value keeps stable, the adjustment of that frequency
point is completed. Then click the next frequency point to do the
adjustment. After all of the five frequency points are adjusted, use
the same method to adjust the five frequency points for
narrowband. The only difference is that the frequency of the
Table 6.3 VCO
Item Test Condition
Setting BATT terminal voltage: 7.5V DMM CV
VCO lock voltage
Item Test Condition
Audio level
Sensitivity
CH: Rx high freq point C180 4.0V±0.2V Adjustment
CH: Tx high freq point
Test freq: Mid freq point
Antenna input:
RF OUT: -53dBm (501V)
MOD: 1kHz
DEV: ±3.0kHz
Audio load: 16
CH: Mid freq point
CH: Low freq point
CH: High freq point
RF OUT: -119dBm (0.25V)
MOD: 1kHz
DEV: ±3.0kHz
CH: Rx center freq point SQL On sensitivity
Level 9
RF OUT: -116dBm
Tes t
Equipment
Table 6.4 Receiver Section
Tes t
Equipment
RF signal
generator
Oscilloscope
Audio
frequency
voltmeter
Distortion
meter
/General test
set
modulation signal should be 1kHz, and the deviation should be
1.5kHz.
In the Tuning Mode, double click “SQL9 Off” to enter. Click
wideband and use the following method to adjust the five
frequency points of “Lowest”, “Low”, “Mid”, “High”, and
“Highest” respectively. Firstly, click one of the frequency points,
and adjust the RF signal frequency of the test equipment to be the
same with the receiving frequency of that frequency point, and
adjust the signal level to be -118dBm. Then adjust the frequency
of the modulation signal to be 1kHz and the deviation to be 3kHz.
The programming software will adjust the value automatically.
When the value keeps stable, the adjustment of that frequency
point is completed. Then click the next frequency point to do the
adjustment. After all of the five frequency points are adjusted, use
the same method to adjust the five frequency points for
narrowband. The only difference is that the frequency of the
modulation signal should be 1kHz, and the deviation should be
1.5kHz.
In the Tuning Mode, double click “SQL1 On” and “SQL1
Off” to enter respectively. Use the same method stated above to do
the adjustment. The only difference is that the RF signal level for
“SQL1 On” should be 123dBm, and the RF signal level for
“SQL1 Off” should be 125dBm.
6.4 Adjustment Description
See Table 6.3, 6.4, and 6.5.
Measurement
Ter min al
Measurement
Ter min al
Speaker
connector
14
Adjustment
Parts
4.0V±0.2V Adjustment
Adjustment
Parts
PC Tuning
Mode
PC Tuning
Mode
Requirement Remark
Requirement Remark
(Turn the
volume knob
clockwise to
the end) Audio
power ＞
1.2W
SINAD: 12dB
or higher
Normal
squelch on
after
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PT568 Service Manual
Level 1
RF OUT: -123dBm
Item Test condition
Tx frequency
DCS waveform
(balance)
Power Power: 7.5V
Max. modulation
deviation
Modulation
sensitivity
CH：Tx center freq point
AG：1kHz/220mV
CH：Tx center freq point
AG：1kHz/22mV
CTCSS DEV CTCSS：67Hz
DCS DEV DCS：023N
Low battery
warning
Battery terminal: 6.8V
Table 6.5 Transmitter Section
Tes t
equipment
Measuring
terminal
Frequency
counter /
General test set
Oscilloscope /
General test set
Power meter/
General test set
Ammeter
Deviation
meter/ General
test set
Antenna
Deviation
meter/
General test
set
Deviation
meter/
General test
set
adjustment
Adjustment
parts
PC Tuning
Mode
Requirement Remark
Within ±200Hz
Smooth and
VR1
similar to square
wave
PC Tuning
Mode
Adjust to 4W
VR2 Adjust to ±4.2kHz ±200Hz
Deviation
checked should be
2.2kHz~3.6kHz
PC Tuning
Mode
PC Tuning
Mode
PC Tuning
Mode
Adjust to
±0.75kHz
Adjust to
±0.75kHz
Indicator flashes
after adjustment
Within
±0.2W
±50Hz
±50Hz
Chapter 7 Specifications
7.1 General Specifications
Product Model PT568
136 ~ 174 MHz
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) 52.5mm × 111mm × 33.5mm
Weight 270g: with antenna and 1500mAh
7.2 Receiver Section
Sensitivity (12dB SINAD) 0.25V(W) / 0.28V(N)
Adjacent Channel Selectivity W: 70dB / N: 60dB
Intermodulation Interference 65dB
Audio Output Power 1W (16)
Audio Distortion 5%
400 ~ 450MHz
420 ~ 470 MHz
Li-Poly Battery: 1500mAH 7.4V
Li-Poly Battery
7.3 Transmitter Section
Tx Power 4W(UHF) / 5W(VHF)
Modulation Type W:16KF3E / N:11KF3E
Clutter and Harmonic -36 dBm
Residual FM（300~3000Hz） W:-45 dB / N:-40dB
Audio Distortion（300~3000Hz） 5%
Adjacent Channel Power W: 70dB / N: 60dB
Max. Deviation W: <±5kHz / N: <±2.5kHz
Chapter 8 Troubleshooting
No. Problem Causes and Solutions
1 No display after
switching on
the radio
2 PLL
unlocked
(Beeping)
3 Cannot talk to
or hear other
15
A. Battery power may be insufficient, please recharge
or change the battery pack.
B. The power switch is broken, please change it.
C. The CPU is broken, please change the IC.
D. The regulator tube IC12 is broken, please change
the IC.
A. The PLL crystal oscillator X4 is broken. Please
change it.
B. The oscillator transistor Q14 and Q15 are broken.
Please change them.
C. The PLL IC1 is broken. Please change it.
A. The frequencies of both users are not the same,
select the same frequency channel.
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PT568 Service Manual
group members B. The CTCSS/DCS of both users are not the same.
Please reset it with PC.
C. The radio is out of the effective communication
range.
4 Cannot receive
signals
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.
7 Cannot program
the radio
parameters
normally
A. The antenna is in poor contact. Please fasten the
antenna until secure.
B. The sensitivity is too low, please adjust it with PC.
C. The HF amplifier Q20 is broken. Please change it.
D. The squelch level is too high and the squelch cannot be
opened. Please reset the squelch level with PC.
E. The mixing tube Q19 is broken. Please change it.
F. The FM processing chip IC5 is broken. Please
change it.
G. The crystal filter XF1, XF2 are broken, please
change them.
H. The ceramic filter CF1 is broken, please change it.
A. The amplifier tube Q11 is broken, so there is no
power output, please change it.
B. The microphone is broken, please change it.
C. The operational amplifier IC3 is broken, please
change it.
A. The speaker is broken. Please change it.
B. The audio power amplifier IC8 is broken. Please
change it.
C. The switch tube Q36, Q35 are broken, please
change them.
D. The operational amplifier IC6 is broken, please
change it.
A. The cable connection is wrong, please check the
cable connection.
B. The computer RS232 serial port output is
abnormal, please check the computer.
C. The external MIC/Speaker jack is in poor contact,
please change the jack.
Chapter 9 KBC-70Q Charger
9.1 Working Conditions and General Specifications
a) Applicable battery: Li-poly (2*3.7v) and Ni-MH (6*1.2) battery
(battery capacity: 1 – 2.4AH).
b) Applicable power adapter: DC 11V-16V, 1000mA. Voltage of
standard power adapter: 12V.
c) Idling input current: 15mA.
d) Pre-charge current: 75mA ± 10mA.
e) Pre-charge time limit: 15Min.
f) Constant charging current: 800mA ± 40mA.
g) Max. charging voltage for Li-poly battery: 8.32 – 8.42V;
Max. charging voltage for Ni-MH battery: 9.6 ± 0.1V.
9.2 Function Description
1. KBC-70Q is an intelligent charger which is safe and reliable,
and has fast charging speed and high charging saturation.
2. Status indication function: In the pre-charge process, the red
LED will flash; in the charging process, the red LED will light; if
the radio is fully charged, or no battery is inserted to the charger
slot, or the battery is in the protection status, the green LED will
light; if the battery output is in short circuit, the yellow LED will
flash.
3. External port of KBC-70Q can identify Li-poly battery and
Ni-MH battery.
4. Short circuit protection: If the positive and negative terminals
of the charger are in short circuit, the yellow LED will flash, and
the charging current will be cut off. After the fault is removed, the
charger will resume normal operation.
5. Fully charged battery identification: If the user recharges a
Ni-MH battery that has been fully charged, the charger will still
charge the battery, and will judge if the battery is fully charged
according to normal –V; if the user recharges a Li-poly battery
that has been fully charged, the charger will detect the voltage of
the battery. If the voltage is higher than 8.25V, the charger will not
charge; if the voltage is lower than 8.25V, the charger will charge
the battery again.
6. Temperature protection: For Li-poly battery, when the
temperature is higher than 55℃, the charger will stop charging,
and the yellow LED will light; when the temperature comes back
to 45℃, the charger will start charging again. For Ni-MH battery,
when the temperature is higher than 60℃, the charger will stop
charging, and the yellow LED will light; when the temperature
comes back to 50℃, the charger will start charging again.
7. When the radio is in the standby mode, if it is inserted into the
charger slot, the charger will charge it automatically if the battery
voltage is lower than 8.2V.
8. LED status:
LED Status
Charger Status
Standby/No battery
inserted
Pre-charge Flash / /
Rapid charge Light / /
Charging completed / Light /
Abnormal
charging status
Charging
Indicator
(red)
/ Light /
/ / Light
Power
Indicator
(green)
Indicator for
abnormal battery
temperature
(yellow)
Interface Description
Red LED: Charging indication
Green LED: Power indication/charging completion indication
Yellow LED: Abnormal charging indication
17
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PT568 Service Manual
Face the charger, from left to right:
B-: Charging output negative terminal
TYPE: Battery type detection
Suspended: Ni-MH battery
Grounded: Li-poly battery
TEMP: Battery temperature detection.
B+: Charging output positive terminal
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 Compensated Crystal Oscillators
TX: Transmitter
UL: Un-lock
VCO: Voltage Control Oscillator
Appendix 2 Electronic Parts List
No. Part No. Description Unit PCS Position Mark
1 101-00568U-R02
2 102-9140NR-R01 Reset IC / PST9140NR, ROHS pcs 1 IC11
3 102-A31136-R01 IF (FM) demodulation IC / TA31136FN,SSOP, ROHS pcs 1 IC5
4 102-AT2408-R02 Memory IC / AT24C08BN-SH, ROHS pcs 1 IC9
5 102-B15E03-R01 PLL IC / MB15E03SL,PLL,16-PIN,SSOP, ROHS pcs 1 IC1
6 102-DA8541-R01 Audio power amplifier / TDA8541,SO8, ROHS pcs 1 IC8
7 102-HT7130-R01 Voltage regulator IC / HT7130-1,SOT-89, ROHS pcs 1 IC14
8 102-HT7150-R01 Voltage regulator IC / HT7150-1, ROHS pcs 1 IC12
9 102-M2902V-R01 Operational amplifier / NJM2902V,OP-AMP, ROHS pcs 3 IC4, IC6, IC7
10 102-M2904V-R01 Operational amplifier / NJM2904V,OP-AMP, ROHS pcs 1 IC3
11 103-00MA77-R01 Chip HF switch diode / MA77,0805, ROHS pcs 1 D1
12 103-1SR154-R01 Chip rectifying diode / 1SR154-400(ROHM), ROHS pcs 1 D33
13 103-1SS372-R01 Chip switch diode / 1SS372(TOSHIBA), ROHS pcs 1 D13
14 103-1SV278-R01 Chip variable capacitor diode / 1SV278, ROHS pcs 2 D9, D10
15 103-1SV325-R01 Chip variable capacitor diode / 1SV325, ROHS pcs 2 D8, D11
16 103-A2S111-R01 Chip switch diode / 0603,MA2S111(PANASONIC), ROHS pcs 3 D15, D16, D25
17 103-DAN222-R01 Chip switch diode / DAN222,(ROHM), ROHS pcs 1 D308
18 103-HSC277-R01 Chip diode / waveband switch,HSC277(HITACHI), ROHS pcs 3 D3, D6, D7
19 103-HVC131-R01 Chip HF switch diode / 0603,HVC131(HITACHI), ROHS pcs 2 D4, D5
20 103-HVC350-R01 Chip variable capacitor diode / 0603,HVC350B(HITACHI), ROHS pcs 6 D21, D22, D23, D24, D26, D30
21 103-HZU5AL-R01 Chip voltage regulator diode / HZU5ALL(HITACHI), ROHS pcs 1 D14
22 103-L190YG-R01 Chip LED / 0603, green, H19-213SYGC, ROHS pcs 2 D20, D29
23 103-MHC190-R02 Chip LED / 0603, red, 19-21SURC/S530-A2/TR8, ROHS pcs 1 D28
24 103-RB706F-R01 Chip switch diode / RB706F-40,SOT-323, ROHS pcs 1 D17
25 103-RKV500-R01 Chip variable capacitor diode / 0805,RKV500KG, ROHS pcs 1 D12
26 104-A144EE-R01 Chip triode / DTA144EE(ROHM), ROHS pcs 4 Q17, Q33, Q34, Q40
PT568PCB / UHF, four layers, FR4, 1.2mm, PT568U-090409,
ROHS
pcs 1
18
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PT568 Service Manual
27 104-C144EE-R01 Chip triode / DTC144EE(ROHM), ROHS pcs 13
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-SC3356-R01 Chip triode / 2SC3356,R24, ROHS pcs 1 Q3
34 104-SC4617-R02 Chip triode / 2SC4617(R)(ROHM), ROHS pcs 4 Q6, Q7, Q9, Q37
35 104-SC4919-R01 Chip triode / 2SC4919,MUTING,CIRCUIT(SANYO), ROHS pcs 1 Q24
36 104-SC5108-R01 Chip triode / 2SC5108Y(TOSHIBA), ROHS pcs 3 Q2, Q4, Q5
37 104-TA1298-R01 Chip triode / KTA1298(Y), ROHS pcs 3 Q29, Q31, Q32
38 104-TC4082-R01 Chip triode / KTC4082,(KEC), ROHS pcs 2 Q1, Q21
39 105-2SJ243-R01 Chip FET / 2SJ243, ROHS pcs 1 Q16
40 105-2SK508-R01 Chip FET / 2SK508NV(K52), ROHS pcs 2 Q14, Q15
41 105-3SK318-R01 Chip FET / 3SK318, ROHS pcs 2 Q19, Q20
42 105-RD01MU-R01 Chip FET / RD01MUS2, ROHS pcs 1 Q12
43 105-SK1824-R01 Chip FET / 2SK1824, ROHS pcs 6 Q13, Q25, Q36, Q38, Q41, Q51
44 105-SK3476-R01 Chip FET / 2SK3476, ROHS pcs 1 Q11
45 105-ST2302-R01 Chip FET / ST2302, ROHS pcs 2 Q47, Q48
46 106-0BA010-R01 Button switch / SKHLLBA010, ROHS pcs 1 K1
47 106-454548-R01 Touch switch / 4.5*4.5*4.8, ROHS pcs 2 K2, K4
48 106-LBE010-R01 Chip touch switch / SKRTLBE010, ROHS pcs 1 K3
49 106-RE0814-R02 Encoder switch / RE08140AX-V01-0000,16P16 , ROHS pcs 1 SW2
50 108-450C24-R02 Chip discriminator / JTBM450CX24, ROHS pcs 1 CD1
51 108-CF450G-R02 Chip ceramic filter / LTWC450G,450kHz±5kHz, ROHS pcs 1 CF1
52 108-XF5165-R01
53 109-040000-R01 Chip resistor / 0402,0R±5%, ROHS pcs 20
54 109-040100-R01 Chip resistor / 0402,10R±5%, ROHS pcs 6 R95, R96, R98, R101, R127, R200
55 109-040101-R01 Chip resistor / 0402,100R±5%, ROHS pcs 6 R4, R12, R89, R90, R128, R240
56 109-040102-R01 Chip resistor / 0402,1K±5%, ROHS pcs 20
57 109-040103-R01 Chip resistor / 0402,10K±5%, ROHS pcs 23
58 109-040104-R01 Chip resistor / 0402,100K±5%, ROHS pcs 18
59 109-040105-R01 Chip resistor / 0402,1M±5%, ROHS pcs 9
60 109-040111-R01 Chip resistor / 0402,110R±5%, ROHS pcs 1 R91
61 109-040122-R01 Chip resistor / 0402,1.2K±5%, ROHS pcs 1 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 5 R5, R8, R9, R17, R248
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 9
66 109-040154-R01 Chip resistor / 0402,150K±5%, ROHS pcs 4 R94, R113, R190, 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 2 R44, R224
69 109-040183-R01 Chip resistor / 0402,18K±5%, ROHS pcs 4 R149, R210, R218, R219
70 109-040184-R01 Chip resistor / 0402,180K±1%, ROHS pcs 3 R66, R67, R86
71 109-040203-R01 Chip resistor / 0402,20K±5%, ROHS pcs 1 R249
Chip crystal filter / DSF753SBF ， 51.65MHz ± 4kHz/3dB ，
(7.0x5.0x1.3)mm， ROHS
pcs 1 XF1
Q8, Q22, Q23, Q26, Q27, Q28, Q35, Q39, Q42,
Q44, Q45, Q46, Q52
C67, C166, C250, R7, R18, R24, R27, R30, R141,
R182, R183, R203, R217, R241, R260, R261, R262,
R268, R278, R283
R37, R38, R41, R42, R47, R48, R49, R50, R69,
R129, R130, R131, R150, R152, R157, R191, R199,
R234, R238, R256
R29, R80, R92, R100, R109, R110, R116, R117,
R119, R120, R121, R122, R123, R133, R136, R137,
R138, R139, R140, R194, R205, R275, R280
R6, R102, R104, R115, R154, R158, R174, R197,
R212, R226, R228, R235, R236, R243, R247, R257,
R272, R300
R43, R79, R84, R103, R107, R160, R162, R266,
R297
C187, C188, C189, R52, R76, R142, R155, R156,
R192
18
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PT568 Service Manual
72 109-040220-R01 Chip resistor / 0402,22R±5%, ROHS pcs 3 R73, R93, R274
73 109-040221-R01 Chip resistor / 0402,220R±5%, ROHS pcs 6 R179, R180, R214, R215, R216, R244
74 109-040222-R01 Chip resistor / 0402,2.2K±5%, ROHS pcs 5 R2, R39, R185, R186, R187
75 109-040223-R01 Chip resistor / 0402,22K±5%, ROHS pcs 3 R106, R198, R209
76 109-040224-R01 Chip resistor / 0402,220K±5%, ROHS pcs 12
77 109-040271-R01 Chip resistor / 0402,270R±5%, ROHS pcs 1 R35
78 109-040272-R01 Chip resistor / 0402,2.7K±5%, ROHS pcs 4 R40, R148, R223, R363
79 109-040273-R01 Chip resistor / 0402,27K±5%, ROHS pcs 6 R46, R99, R171, R172, R193, R271
80 109-040274-R01 Chip resistor / 0402,270K±5%, ROHS pcs 1 R231
81 109-040330-R01 Chip resistor / 0402,33R±5%, ROHS pcs 1 R72
82 109-040332-R01 Chip resistor / 0402,3.3K±5%, ROHS pcs 8 R26, R55, R56, R57, R59, R60, R97, R111
83 109-040333-R01 Chip resistor / 0402,33K±5%, ROHS pcs 8 R25, R114, R161, R196, R206, R258, R263, R265
84 109-040334-R01 Chip resistor / 0402,330K±5%, ROHS pcs 3 R15, R82, R105
85 109-040392-R01 Chip resistor / 0402,3.9K±5%, ROHS pcs 2 R221, R222
86 109-040393-R01 Chip resistor / 0402,39K±5%, ROHS pcs 2 R53, R68
87 109-040394-R01 Chip resistor / 0402,390K±5%, ROHS pcs 1 R165
88 109-040470-R01 Chip resistor / 0402,47R±5%, ROHS pcs 2 R31, R32
89 109-040471-R01 Chip resistor / 0402,470R±5%, ROHS pcs 2 R3, R81
90 109-040472-R01 Chip resistor / 0402,4.7K±5%, ROHS pcs 4 R151, R159, R204, R282
91 109-040473-R01 Chip resistor / 0402,47K±5%, ROHS pcs 16
92 109-040474-R01 Chip resistor / 0402,470K±5%, ROHS pcs 3 R166, R232, R264
93 109-040560-R01 Chip resistor / 0402,56R±5%, ROHS pcs 1 R58
94 109-040561-R01 Chip resistor / 0402,560R±5%, ROHS pcs 1 R202
95 109-040562-R01 Chip resistor / 0402,5.6K±5%, ROHS pcs 9 R61, R62, R63, R64, R65, R132, R184, R195, R302
96 109-040563-R01 Chip resistor / 0402,56K±5%, ROHS pcs 12
97 109-040564-R01 Chip resistor / 0402,560K±5%, ROHS pcs 1 R163
98 109-040682-R01 Chip resistor / 0402,6.8K±5%, ROHS pcs 2 C276, R220
99 109-040683-R01 Chip resistor / 0402,68K±5%, ROHS pcs 1 R245
100 109-040684-R01 Chip resistor / 0402,680K±5%, ROHS pcs 1 R77
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 2 R51, R255
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 L23, L34, L62, L66, 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
112 110-110503-R01
113 110-110683-R02
114 110-220103-R03 Volume switch / RY-6932， ROHS pcs 1 SW1
115 111-030000-R01
116 112-043100-R01 Chip capacitor / 0402,10P±0.5P,50V,C0G, ROHS pcs 6 C47, C124, C142, C257, C282, C288
117 112-043101-R01 Chip capacitor / 0402,100P±5%,50V,C0G, ROHS pcs 2 C119, C196
118 112-043102-R01 Chip capacitor / 0402,1000P±10%,50V,X7R, ROHS pcs 29
119 112-043103-R01 Chip capacitor / 0402,0.01uF±10%,50V,X7R, ROHS pcs 17 C23, C50, C79, C138, C149, C153, C155, C159,
Chip trimming resistor / EVM2NSX80B54，50K±25%，B Linear,
ROHS
Chip trimming resistor / EVM2NSX80BS4，68K±25%，B Linear，
PANASONIC, ROHS
Chip self-resume fuse / 433003,3A/32V,1206(original 429003)，
ROHS
pcs 1 VR2
pcs 1 VR1
pcs 1 F1
R87, R126, R164, R207, R227, R233, R246, R251,
R252, R269, R279, R281
R10, R11, R13, R14, R19, R20, R21, R22, R28,
R75, R118, R125, R153, R273, R277, R292
R16, R173, R175, R176, R177, R178, R225, R239,
R254, R267, R270, R284
C38, C72, C73, C75, C96, C97, C98, C99, C100,
C103, C104, C105, C106, C109, C111, C112, C114,
C150, C151, C169, C172, C184, C241, C263, C264,
C272, C278, C279, C294
19
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PT568 Service Manual
C160, C161, C162, C190, C226, C232, C253, C296,
C313
120 112-043104-R01 Chip capacitor / 0402,0.1uF,+80%--20%,16V,Y5V, ROHS pcs 6 C179, C185, C317, C318, C357, C358
C35, C82, C83, C85, C101, C167, C168, C173,
121 112-043104-R02 Chip capacitor / 0402,0.1uF±10%,16V,X7R, ROHS pcs 20
122 112-043105-R01 Chip capacitor / 0402,1uF±10%,6.3V,X5R, ROHS pcs 15
123 112-043121-R01 Chip capacitor / 0402,120P±5%,50V,C0G, ROHS pcs 1 C214
124 112-043122-R01 Chip capacitor / 0402,1200P±10%,50V,X7R, ROHS pcs 1 C211
125 112-043123-R01 Chip capacitor / 0402,0.012uF±10%,25V,X7R, ROHS pcs 5 C157, C158, C239, C249, C275
126 112-043130-R01 Chip capacitor / 0402,13P±5%,50V,C0G, ROHS pcs 1 C69
127 112-043150-R01 Chip capacitor / 0402,15P±5%,50V,C0G, ROHS pcs 2 C86, C195
128 112-043152-R01 Chip capacitor / 0402,1500P±10%,50V,X7R, ROHS pcs 1 C289
129 112-043180-R01 Chip capacitor / 0402,18P±5%,50V,C0G, ROHS pcs 1 C212
130 112-043182-R01 Chip capacitor / 0402,1800P±10%,50V,X7R, ROHS pcs 2 C51, C113
131 112-0431R0-R01 Chip capacitor / 0402,1P±0.25P,50V,C0G, ROHS pcs 1 C229
132 112-043200-R01 Chip capacitor / 0402,20P±5%,50V,C0G, ROHS pcs 1 C141
133 112-043220-R01 Chip capacitor / 0402,22P±5%,50V,C0G, ROHS pcs 3 C143, C255, C256
134 112-043221-R01 Chip capacitor / 0402,220P±5%,50V,C0G, ROHS pcs 1 C295
135 112-043222-R01 Chip capacitor / 0402,2200P±10%,50V,X7R, ROHS pcs 1 C262
136 112-043223-R01 Chip capacitor / 0402,0.022uF±10%,25V,X7R, ROHS pcs 1 C245
137 112-043224-R02 Chip capacitor / 0402,0.22uF±10%,10V,X7R, ROHS pcs 1 C280
138 112-043270-R01 Chip capacitor / 0402,27P±5%,50V,C0G, ROHS pcs 1 C227
139 112-043271-R01 Chip capacitor / 0402,270P±10%,50V,X7R, ROHS pcs 1 C1
140 112-043273-R01 Chip capacitor / 0402,0.027uF±10%,50V,X7R, ROHS pcs 2 C244, C323
141 112-0432R0-R01 Chip capacitor / 0402,2P±0.25P,50V,C0G, ROHS pcs 2 C218, C301
142 112-043300-R01 Chip capacitor / 0402,30P±5%,50V,C0G, ROHS pcs 2 C200, C319
143 112-043330-R01 Chip capacitor / 0402,33P±5%,50V,C0G, ROHS pcs 1 C171
144 112-043333-R01 Chip capacitor / 0402,0.033uF±10%,16V,X7R, ROHS pcs 3 C213, C223, C283
145 112-043360-R01 Chip capacitor / 0402,36P±5%,50V,C0G, ROHS pcs 1 C90
146 112-043392-R01 Chip capacitor / 0402,3900P±10%,50V,X7R, ROHS pcs 3 C222, C238, C284
147 112-043393-R01 Chip capacitor / 0402,0.039uF±10%,10V,X7R, ROHS pcs 1 C299
148 112-0433R0-R01 Chip capacitor / 0402,3P±0.25P,50V,C0G, ROHS pcs 4 C70, C182, C230, C302
149 112-043470-R01 Chip capacitor / 0402,47P±5%,50V,C0G, ROHS pcs 2 C4, C293
150 112-043471-R01 Chip capacitor / 0402,470P±10%,50V,X7R, ROHS pcs 79
151 112-043472-R01 Chip capacitor / 0402,4700P±10%,25V,X7R, ROHS pcs 6 C156, C215, C285, C322, C324, C325
152 112-043474-R01 Chip capacitor / 0402,0.47uF±10%,10V,X5R, ROHS pcs 2 C80, C192
153 112-0434R0-R01 Chip capacitor / 0402,4P±0.25P,50V,C0G, ROHS pcs 3 C228, C309, C312
154 112-0435R0-R01 Chip capacitor / 0402,5P±0.25P,50V,C0G, ROHS pcs 2 C87, C118
155 112-043680-R01 Chip capacitor / 0402,68P±5%,50V,C0G, ROHS pcs 1 C314
156 112-043681-R01 Chip capacitor / 0402,680P±10%,16V,X7R, ROHS pcs 3 C57, C258, C260
157 112-043683-R01 Chip capacitor / 0402,0.068uF±10%,16V,X7R, ROHS pcs 4 C242, C243, C247, C259
158 112-0436R0-R01 Chip capacitor / 0402,6P±0.5P,50V,C0G, ROHS pcs 1 C131
159 112-0437R0-R01 Chip capacitor / 0402,7P±0.5P,50V,C0G, ROHS pcs 1 C122
160 112-0438R0-R01 Chip capacitor / 0402,8P±0.5P,50V,C0G, ROHS pcs 4 C32, C126, C145, C311
161 112-0439R0-R01 Chip capacitor / 0402,9P±0.5P,50V,C0G, ROHS pcs 2 C127, C128
162 112-043R50-R01 Chip capacitor / 0402,0.5P±0.1P,50V,C0G, ROHS pcs 2 C147, C219
C174, C175, C176, C177, C178, C221, C231, C233,
C254, C271, C307, C310
C25, C30, C123, C170, C225, C235, C248, C251,
C300, C303, C315, C321, C326, C331, C400
C6, C286, C74, C107, C7, C8, C9, C10, C11, C12,
C13, C14, C15, C16, C17, C18, C19, C20, C21,
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, C110, C125, C146, C152,
C154, C163, C183, C186, C220, C237, C261, C267,
C268, C269, C270, C274, C277, C287, C290, C291,
C297, C305, C316, C320, C327, C328, C329, C502,
R78
20
Page 21
PT568 Service Manual
163 112-043R75-R01 Chip capacitor / 0402,0.75P±0.1P,50V,C0G, ROHS pcs 2 C216, C217
164 112-063101-R01 Chip capacitor / 0603,100P±5%,50V,C0G, ROHS pcs 1 C144
165 112-063102-R01 Chip capacitor / 0603,1000P±10%,50V,X7R, ROHS pcs 1 L16
166 112-063150-R01 Chip capacitor / 0603,15P±5%,50V,C0G, ROHS pcs 1 C133
167 112-0631R0-R01 Chip capacitor / 0603,1P±0.25P,50V,C0G, ROHS pcs 2 C148, C236
168 112-0631R5-R01 Chip capacitor / 0603,1.5P±0.25P,50V,C0G, ROHS pcs 1 C62
169 112-063270-R01 Chip capacitor / 0603,27P±5%,50V,C0G, ROHS pcs 1 C94
170 112-0632R0-R01 Chip capacitor / 0603,2P±0.25P,50V,C0G, ROHS pcs 2 C2, C3
171 112-063390-R01 Chip capacitor / 0603,39P±5%,50V,C0G, ROHS pcs 1 C194
172 112-0633R0-R01 Chip capacitor / 0603,3P±0.25P,50V,C0G, ROHS pcs 2 C121, C137
173 112-0633R5-R01 Chip capacitor / 0603,3.5P±0.25P,50V,C0G, ROHS pcs 3 C63, C117, C120
174 112-063471-R01 Chip capacitor / 0603,470P±10%,50V,X7R, ROHS pcs 2 C5, C27
175 112-0634R0-R01 Chip capacitor / 0603,4P±0.25P,50V,C0G, ROHS pcs 2 C88, C129
176 112-063560-R01 Chip capacitor / 0603,56P±5%,50V,C0G, ROHS pcs 1 C139
177 112-0635R0-R01 Chip capacitor / 0603,5P±0.25P,50V,C0G, ROHS pcs 1 C116
178 112-063680-R01 Chip capacitor / 0603,68P±5%,50V,C0G, ROHS pcs 1 C93
179 112-0636R0-R01 Chip capacitor / 0603,6P±0.5P,50V,C0G, ROHS pcs 2 C136, C206
180 112-0638R0-R01 Chip capacitor / 0603,8P±0.5P,50V,C0G, ROHS pcs 1 C135
181 112-0639R0-R01 Chip capacitor / 0603,9P±0.5P,50V,C0G, ROHS pcs 2 C78, C91
182 112-063R50-R01 Chip capacitor / 0603,0.5P±0.1P,50V,C0G, ROHS pcs 1 C115
183 112-072106-R01 Chip Ta capacitor / TP model, SIZE P,10uF±20%,6.3V, ROHS pcs 3 C191, C198, C199
184 112-072225-R01 Chip Ta capacitor / TP model, SIZE P,2.2uF±20%,10V, ROHS pcs 2 C140, C246
185 112-072475-R01 Chip Ta capacitor / TP model, SIZE P,4.7uF±20%,10V, ROHS pcs 7 C165, C201, C202, C273, C292, C298, C308
186 112-073105-R01 Chip capacitor / 0805,1uF+80%--20%,16V,Y5V, ROHS pcs 1 C306
187 112-073225-R01 Chip capacitor / 0805,2.2uF+80%--20%,10V,Y5V, ROHS pcs 1 C234
188 112-073334-R02 Chip capacitor / 0805,330nF±10%,16V,X7R, ROHS pcs 2 C33, C209
189 112-102104-R01 Chip Ta capacitor / TS model, SIZE A,0.1uF±20%,35V, ROHS pcs 2 C193, C204
190 112-102106-R02 Chip Ta capacitor / TS model, SIZE A,10uF±20%,10V, ROHS pcs 3 C197, C203, C210
191 112-102156-R01 Chip Ta capacitor / TS model, SIZE A,15uF±20%,6.3V, ROHS pcs 1 C208
192 112-102225-R01 Chip Ta capacitor / TS model, SIZE A,2.2uF±20%,10V, ROHS pcs 1 C207
193 112-102475-R02 Chip Ta capacitor / TS model, SIZE A,4.7uF±20%,16V, ROHS pcs 4 C46, C224, C240, C266
194 112-112476-R02 Chip Ta capacitor / TS model, SIZE B,47uF±20%,10V, ROHS pcs 1 C330
195 113-010100-R01 Chip trimming capacitor / TZV2Z100A110,3~10p+100, ROHS pcs 2 C180, C181
196 114-06E180-R01
197 114-06E331-R02 Chip inductor / MLF1608R33K,330nH±10%,0603, ROHS pcs 2 L59, L69
198 114-06E560-R01
199 114-06E680-R01
200 114-06G102-R01 Chip inductor / MLF1608A1R0K,1uH±5%,0603, ROHS pcs 1 L68
201 114-06G120-R01 Chip inductor / MLG1608B12NJT,12nH±5%,0603, ROHS pcs 1 L31
202 114-06G181-R01
203 114-06G221-R02
204 114-06G270-R01 Chip inductor / MLG1608B27NJ,27nH±5%,0603, ROHS pcs 3 L12, L32, L33
205 114-06G332-R01 Chip inductor / MLF1608A3R3K,3.3uH±5%,0603, ROHS pcs 2 L28, L29
206 114-06G470-R01 Chip inductor / MLG1608B47NJ,47nH±5%,0603, ROHS pcs 1 L35
207 114-06G561-R01 Chip inductor / MLF1608DR56K,560nH±10%,0603, ROHS pcs 2 L11, L64
208 114-06G6R8-R01 Chip inductor / MLG1608B6N8DT,6.8nH±0.5nH,0603, ROHS pcs 1 C95
209 114-07E220-R02 Chip wire inductor / C2012CB-22NG,22nH±2%,0805, ROHS pcs 1 L51
210 114-07E221-R01
211 114-07E270-R03 Chip wire inductor / C2012C-27NG,27nH±2%,0805, ROHS pcs 1 L30
212 114-08E103-R01 Chip inductor / FSLM2520-100J,10uH±5%,1008, ROHS pcs 1 L45
213 114-08E331-R01 Chip inductor / FSLM2520-R33K,330nH±10%,1008, ROHS pcs 1 L55
Chip wire inductor / C1608CB-18NJ,ceramic chip 18NH±5%,
0603, ROHS
Chip wire inductor / C1608CB-56NJ,ceramic chip 56nH±5%,
0603, ROHS
Chip wire inductor / C1608CB-68NJ,ceramic chip 68nH±5%,
0603, ROHS
Chip stacked inductor / LGHK1608R18J-T,180nH ± 5%,0603,
ROHS
Chip stacked inductor / LGHK1608R22J-T,220nH ± 5%,0603,
ROHS
Chip wire inductor / LQW2BHNR22NJ03L / LQN21AR22J,
220nH±5%, 0805, ROHS
pcs 2 L57, L63
pcs 1 L13
pcs 1 L53
pcs 2 L27, L50
pcs 4 L18, L36, L49, L52
pcs 1 L26
21
Page 22
PT568 Service Manual
214 114-08E821-R01 Chip inductor / FSLM2520-R82K,820nH±10%,1008, ROHS pcs 1 L56
215 115-1R53R0-R04 Chip air-cored coil / 0.4*1.5*3TL, negative, high pin, ROHS pcs 10 L1, L2, L3, L4, L5, L6, L7, L8, L9, L10
216 115-1R54R0-R04 Chip air-cored coil / 0.4*1.5*4TL, negative, high pin, ROHS pcs 2 L14, L15
217 115-1R55R0-R01 Chip air-cored coil / 0.5*1.5*5T, positive, high pin, ROHS pcs 1 L24
218 115-1R58R0-R02 Chip air-cored coil / 0.4*1.5*8TL, negative, high pin, ROHS pcs 1 L25
219 117-000000-R04 Chip bead / EMI,FILTER, SMT,BLM11A221S,0603, ROHS pcs 11
220 117-000000-R05 Chip bead / EMI,FILTER, SMT,BLM21P300S,0805, ROHS pcs 7 L22, L37, L38, L39, L43, L58, L67
221 119-060104-R01 Thermal resistor / NTH5G16P42B104K07TH,100K,0603, ROHS pcs 1 R85
222 121-200000-R01 MIC / B6027AP402-88(old model: B6027AP402-65), ROHS pcs 1 MIC1
223 122-112M80-R01
224 122-17M300-R01 Chip crystal resonator / CSTCR7M30G53-R0,7.3M, ROHS pcs 1 X2
225 124-050000-R15
226 124-050000-R16
227 201-000568-R13A PT568 battery connector / LCP, black, 2P-4.0PH-9.3H, ROHS pcs 1 DC
228 603-000568-R01
229 603-0W558A-R01 Record IC / W588A080, ROHS pcs 1 IC15
Chip temperature compensated crystal / NT5032SC,12.8 ±
2.5PPM, 5.0*3.2*1.6mm, ROHS
2.5mm earphone jack / MOTOROLA interface, PJ-D2008B,
DC30V0.5A, ROHS
3.5mm MIC socket / MOTOROLA interface, PJ-D3027,
DC30V0.5A, ROHS
PT568 programming chip/ CPU, R8C/24, M30C026FPGP#U0,
52PIN, 8 bit MCU, FLASH, ROHS
pcs 1 X4
pcs 1 J2
pcs 1 J1
pcs 1 IC10
L19, L20, L40, L41, L42, L44, L46, L47, L48, L60,
L65
Appendix 3 Structural Parts List
No. Part No. Description Unit PCS
1 121-100000-R20
2 201-000568-R02C PT568 Front Casing / PC+ABS, black, ROHS pcs 1
3 201-000568-R03B PT568 Speaker Cover / PC+ABS, ROHS pcs 1
4 201-000568-R04B PT568 Top Cover / PC+ABS, black, ROHS pcs 1
5 201-000568-R05C PT568 PTT Cover / PC+ABS, black, ROHS pcs 1
6 201-000568-R06A PT568 Volume Knob / ABS, black, ROHS pcs 1
7 201-000568-R07A PT568 Channel Selector Knob / ABS, black, ROHS pcs 1
8 201-000568-R09A PT568 Light Guide / PC, transparent, ROHS pcs 1
9 201-000568-R10B PT568 Earphone Jack Cover / TPU, black, hardness: 90, ROHS pcs 1
10 201-000568-R11A PT568 Earphone Jack Bracket / TPU, Black, Hardness: 90, ROHS pcs 1
11 201-000568-R12A PT568 Rubber Plug for Earphone Jack Cover / PC+ABS, black, ROHS pcs 1
12 201-000568-R14A PT568 Battery Latch / POM, black, ROHS pcs 1
13 202-000558-R09 PT558 MIC Seal / orange silica gel, hardness: 40, ROHS pcs 1
14 202-000568-R01A
15 202-000568-R02A PT568 PTT Button / silica gel (enhanced elasticity), black, hardness: 60, ROHS pcs 1
16 202-000568-R03A PT568 Emergency Button / silica gel (enhanced elasticity), orange, hardness: 60, ROHS pcs 1
17 202-000568-R04A PT568 Top Waterproof Gasket / silica gel, black, hardness: 60, ROHS pcs 1
18 202-000568-R05A PT568 Bracket Waterproof Gasket / silica gel, black, hardness: 60, ROHS pcs 1
19 202-000568-R06B
20 203-000558-R07B PT558 Antenna Connector / Ni-plated brass, ROHS pcs 1
21 203-000558-R13A PT558 Nut for Knob / brass, black, ROHS pcs 2
22 203-000558-R14A PT558 Nut for Antenna / brass, black, ROHS pcs 1
23 203-000568-R02B PT568 Al Chassis / Al alloy (ADC12), abrasive, polished, ROHS pcs 1
24 203-000568-R04C PT568 Battery Hook 1 / Zn alloy (Zn3#), black Zn-plated, ROHS pcs 1
25 203-000568-R05C PT568 Battery Hook 2 / Zn alloy (Zn3#), black Zn-plated, ROHS pcs 1
26 203-000568-R06A PT568 Spring Sheet 1 for Battery Latch / stainless steel (SUS301), 0.25THK, ROHS pcs 1
27 203-000568-R07A PT568 Spring Sheet 2 for Battery Latch / stainless steel (SUS301), 0.25THK, ROHS pcs 1
Speaker / 16±15% OHM 1W, diameter: 40±0.3MM, height: 5.1±0.3MM (Max. audio
power: 2W), ROHS
PT568 Main Waterproof Loop / silica gel (enhanced elasticity), black, hardness: 40,
ROHS
PT568 Thermal-conductive Silica Gel Gasket / silica gel, black, 3*6*9mm, softer than A
type, ROHS
pcs 1
pcs 1
pcs 1 Under FET
22
Page 23
PT568 Service Manual
28 203-000568-R08A PT568 Top Gasket / stainless steel (SUS304), 0.30THK, ROHS pcs 1
29 203-000568-R09C
30 204-000558-R01 PT558 Waterproof Net for Speaker / black waterproof cloth, ROHS pcs 1
31 204-000568-R01A
32 204-000568-R02B
33 301-20040G-R01B Screw / M2.0*4.0 pan plus Ni-plated, ROHS pcs 13
34 301-20080G-R02B Screw / M2.0*8.0 pan torx Ni-plated, ROHS pcs 2
35 301-25080J-R01 Screw / M2.5*8.0 pan plus black Zn-plated, ROHS pcs 2
PT568 Metal Speaker Net / stainless steel, Φ0.8 holes for sound penetration, 0.10THK,
ROHS
PT568 Waterproof Gasket for MIC Head / white, ventilative film,φ7.0*φ4.5, with
PVC, ROHS
PT568 Double-sided Adhesive Tape for Front Casing / 3M" double-sided adhesive tape,
white, 18*2mm, ROHS"
pcs 1
pcs 1
pcs 2
Appendix 4 Accessories
Name Model Specifications External View
Battery KB-56B 7.4V 1500mAh Li-poly battery
For fixing PCB board
and antenna connector
For fixing Al alloy
chassis
For fixing top cover or
belt clip
Hand Strap KGS-01
Earphone
KME-014
KME-015
KME-016
Charger KBC-70Q 3 hours standard charger
Power Adaptor KTC-50D1 DC OUT 12V 1000mA
Antenna
KA
KA
23
Page 24
PT568 Service Manual
Figure 1 PT568 Block Diagram
5M
CENTER F REQUENCY ADJUS T FROM MCU
5M
7.3MHz RES ET
TOPKEY UP PKEY MODE
PTT DNKEY
BUSY
BATT
RXD
MANDOWN
TI RSS I
SHIFT TO0 TO1 VDEVC1
VDEVC2 PABC WNTC
PST2 IN UL DTAT C LK LE 5 MC
INT TXD
AFCO
5RC 5TC
DTMF DATA_V S CLK_ V
ACBUSY_V
APC S AVE MUTE
VCCN
RX/TXVCO
W558 C
SAVE
5RC
5TC
5C
5T
5R
5M
VOLTAGE REGULATOR
EEPR OM
5M
R5F212 A8
MCU
G/R LED
5M
CLK F ROM MCU
DATA FROM MCU
BUS Y TO MCU
MODE
W558
W/N
AMP
AF
MUTE
AF
MUTE
DTMF/BEEP FROM MCU
5C
5R 5R
AMP
AF
ENCODER KE YS
5C
5C
NOISE
AMP
TA31136NOISE DETBUSY SIGNEL TO MCU
+/- 7. 5KHz
450KHz
AMP
AF
AMP
5R
5R
5R
IF
51.65MHz
+/- 15KHz
MIXER
QT/DQT FR OM MCU
12.8MHz
TCXO
12.8MHz TO
51.2MHz
MODE
5R
DET COLL
FILTER
5C
LOCK TO MCU
5C
TXVCO
RIPPLE
DATA FROM MCU
CLK FROM MCU
LE FR OM MCU
PS FROM MCU
PLL IC
BUFFER
BUFFERRXVCO
AMP
RF
5C
TX/RX S W
5T5R
AMP
RF
AMP
AF
5C W/N
AMP
AMP
AF
DTMF/BEEP FROM MCU
MUTE
MUTE
PT568 BLOCK
RXD
MIC JACK
TXD
2
1
1
2
SP K JACK
33442
1
GND
GND
QT/DQT OUT TO MCU
AF
AF
1
5
4
GND
AF POWER AMP
23
POWER
SW
AFCN
POWER
AF
sw
AMP
5R
RF
3A
POWER SUPPLY
APC
SW
CURRENT
SENSING
CONTROL
APC
APC F ROM MCU
GND
BATT
DRIVER
PRE
5T5T
DRIVER
RF PA
RF PA
ANT SW
5T
24
Page 25
PT568 Service Manual
Figure 2 PT568 Schematic Circuit Diagram
D D
4
SDA5SCL
6
R11 5
100K
1K
R49
R266
1M
C357
1
2
3
4
Ap proved by
Designer
File No .
12345
6
SW2
EN CO DER
R19
C159 103 C 160 103 C161 10 3 C162 103
ECN1
47K
R20
ECN3
47K
R21
ECN2
47K
R22
ECN0
47K
PTT
R223
2.7K
C502
471
K1
PTT
K4
PFI
C49
471
K2
MONI
C60
471
K3
ALA RM
C28 7
471
27K
KEYIN
R11 6
10K
R249
20K
R80
10K
5TC
5RC
SAVE
AFCO1
MUTE
BA T T
10 4
R26 3
33K
R2 6 5
33K
C358
104
SCL
SDA
TU NEPC TV -R
1
DTC 144EE
X27.3MHz
2
2
13
L66
0R
C316
471
RX D
R17 2
5M VC CS
T5 RX D
Q27
DTC144EE
DT C1 44 EE
D7
HSC277
R159
4.7K
C202
4.7uF/10V
C114
102
NC
2
AFCO2
SHIFT
AFCO2
3
Q28
G LED
GLED
PTT SCLK - V
4
PTT
MODE
5
MOD E
VDEVC2
6
VDEVC2
R47 1K
C255 22P
7
VDEVC1
C90
3P
VEDVC1
8
RST
RST
9
XOUT
XOUT
C256
VSS
10
22P
VSS
XIN
11
XIN
VCC
12
R1 0 1
10R
VCC
13
SHI FT
SHIFT
L42BLM11A221S
C31 5
105
MODE
TXD
RS T
T2 M ODE
T4TXD
T3RESET
Q26
10K
GND
R282
4.7K
3
IC11
PST9140NR
NC1VEE12VEE2
OUT4VCC
5
C85 104
R82 330K
C84
471
5T
C173
104
5T
Q29
KTA1298
R18 5
2.2K
R136
10K
5R
C174
104
5R 5C
Q31 KTA1298
R137 10K
R186
2.2K
5C
C175
104
Q32 KTA1298
R138
10K
R187
2.2K
5V
C11 2
102
L43
BLM21P300S
C201
5M
4.7uF/10V
C56
471
5M
Q30 FMMT717
Q10
2SC1623
L62
0R
R139
OUT IN
IC12
HT7150-1
R233
220K
R234
1K
R235
100K
C272
102
Schematic Circuit DiagramName
R245
R178
56K
68K
C283
333
R176
56K
C238
392
C284
392
C260
681
R83
*
R192
15 K
R219
18K
C57
681
C2 5 8
681
5
C hecke d by
Pa ge 1 of 1
Model
Version
PT568 -03
6
14
Aout1A-in2A+in
C178
104
3
R53
39K
C245
C21 0
10uF/10V
223
R163
560 K
C259
683
R222
3.9K
C113
182
C176
104
R78
470P
MUTE
C58
471
R221
3.9K
C177
104
R224
1.8KR3470R
C203 10u F/10V
L48
BLM11A221S
C111
102
R140
10K
TX D
R501K
AFCO2
RX D
5M
5.6K
R302
C59
471
R216
220R
C61
471
PT T
C400
105
J2
MIC JACK
V+
56K
R188 1.2K
0R
R65
5.6K
IC7 NJM 2902V
Cout8C-in9C+in10GND11D+in12D-in13Dout
DTA144EE
B+in5B-in6Bout
L19B LM11A221 S
4
7
R177
R301 12K
R196
33K
C257
C101
104
R220
6.8K
D13
1SS372
10P
C300
100R
C140
2.2uF/10V
105
R12
R280
10K
D308
DA N22 2
R33
820R
DTM F
2SC4919
Q24
R198
22K
C310
104
DTC144EE
Q44
4. 7uF/ 10V
R30
C55
471
MIC1
MIC
C C
D19
*
R214
Q22
220R
L60
BLM11A221S
C52
C54
471
VR EF
TI
BU S Y
BA T T
VREF
NC40TI41BUSY42BAT43VREF44SAVE45MUTE465RC47KEYIN485TC49RLED50AC51AFCO1
NC
NC
W558C
SCL K - V
DATA-V
BUSY-V
RX
LE
DT
CK
RXD
TXD
UL
SCL
NC
25
26
24
ECN1
ECN2
ECN3
SCL
DTC 144EE
Q39
C155
R212
100 K
C246
2.2uF/10V
R46
27K
C297
471
C298
4. 7u F/10V
R255
82K
18 K
C 295 2 21
7
R246
22 0K
Cout8C-in9C+in
R272
100 K
C2 96 10 3
C299393
R13310K R7 7 68 0K
R218
C53
471
18K
10uF/6.3V
C199
Q40
DTA144EE
R300
100K
R9
120K
AF
Cout8C-in9C+in10GND11D+in12D-in13Dout
B+in3B-in2Bout
1
5R
R211
12K
R87
220K
C252
*
C324
472
4
R283
0R
B+in
B-in6Bout
5
R270
56K
C325
472
R281
220 K
C326
105
R64
5.6K
AC
R228
100K
R157
1K
AC
2SK1824
R277
47 K
R292
47K
R2780RC279
102
C280
224
R238
1K
4
OUT-
VCC6GND
5
R284
56K
R274
22R
C271
10 4
471
C277
471
Q48S T230 2
470 K
1
SP-
SP +
3344221
T7
SP+T9SP-
R236 1 00K
56K
*
220K
7
39
38
37
36
35
34
33
32
31
30
29
28
27
VD EVC 2
DT C1 44 EE
R210
R166
470K
123
R165 390K
R267
R269
220 K
Q36
2S K18 24
DTC 144E E
C273 4.7uF/10V
C267
R264
C158
R253
W588C
DATA-V
BU S Y - V
RX
LE
DT
CK
RX D
TX D
UL
18 K
10
10 0K
Q51
MOD E1SVR2IN+3IN-
OUT+
R229
8.2K
R215
220R
R230
8.2K
C270 471
Q42
1M
105
V+
220K
7
R252
105
Q35
DTC 144EE
D28
RED
C307 104
D20
GREEN
C269
471
Q23
DTC144EE
D29
GREEN
RLED
GLED
BEEP
R5215K
C222
392
4.7K
C5 0
103
R205
10K
C285
472
DTMF
C386
V CCN
*
R11 8
47K
C18 5
104
R125
47K
C17 9
104
VCCNOUT
C243
683
TO
R15 6
15K
R15 5
15K
VD EVC 1
C281
*
R27 1
27K
R76 15K
R209
22 K
VR250K
R248
1 20K
16
RST
R48
1K
15
NC
14
R19 9
1K
NC
R201
13
R98
10R
0R
R204
C242
683
68K
R27
0R
R6
100K
NC
12
150K
BUSY1
11
OSC
10
105
VDD
C30 6
9
R200
BUSY - V
10R
C30 5
471
W588C
R203
R19 3
27K
R183
0R
C225
10 5
C241
102
R154
10 0K
Q37
2SC4 617
R152
1K
R195
5.6K
C248
105
R191
1K
APC
R262
0R
VR 1
R20 8
NC
W:H N:L
5R
WNTC
L65 BLM11A2 21S
R114
33K
47P
C293
R149
R113
150 K
22K
Aout1A-in2A+in3V+4B+in5B-in6Bout
GND
D+in12D-in13Dout
14
11
C294102
C275
123
D27*
R174
C168
104
C215 472
C156
R162
472
R132
5.6K
R59
3.3K
R63 5. 6K
C235
123
14
IC6 NJM2902V
Aout7A-in6A+in
4
5
C157 123
C249
12 3
R19 4
10K
R126
220K
C321
105
R225
56K
R227
220K
R207
220K
R251
IC16*
Aout1A-in2A+in3GND
C322
472
V+
8
R242
*
C323
273
R184
C244
273
5.6K
R8
120K
R213
91K
R7 0 R
Q9
2S C4617
C167 104
C170
C276 6.8K
R237
*
Q38
2S K18 24
C250
0R
R273
47K
IC8 TDA8541
R217
0R
BL M 21P30 0S
8
L67
R254
56K
C253
103
C254
10 4
C266
4. 7u F/16V
Q47
ST23 02
C330
47 uF/ 10V
J1 S PK JACK
R226 100K
C251
10 5
R106
IC4NJ M29 02V
R148
2. 7K
C247
683
R86 180K
C24 450
R67 180K
C262222
C223
333
C23 9
5R
R231
270K
R232
470K
C274
471
C320
47 1
BE E P &W 588AFAFO
C109
102
4.7uF/16V
C240
BLM21P300S
L58
SW1 PO W& VOL
SB
R161
33K
C233
104
C317
10 4
C226
103
R206
33K
BLM 21P 30 0S
L22
C3 1 8
104
C237
471
C48
471
R108
*
D33
1SR1 54- 40 0
F13A
MA2S111
D25
C231
104
C232
103
B+
DC
7. 5V
+
-
IC9 AT2408N
A01A12A23GND
TEST
VCC
8
7
C71
471
C152
471
471
R134*
*
R135
AF CO1
RL ED
SAVE
MUTE
5RC
KEYIN
5TC
AC
52
M30 C0 26F PGP
IC10
WNTC
VCCN
TUNE
BEEP
ECN021ECN222ECN323ECN1
APC
SDA
TO
15
14
18
16
17
20
19
VCC NTOWNTC
APC
TUNE
BEEP
SDA
ECN0
R299
*
103
R60
3.3K
WNTC
TI
R275 10K
R276 *
W:H N:L
R175
56K
C213
333
Q34
Q41
2SK1824
Q52
DT C144E E
R27 9 22 0K
C286
12 0P
5V
R268
0R
R110
10K
2SA1586
5M
Q43
R81
470 R
C308
Q46
DT C1 44EE
SDATA8NC
1K
C67
0R
CD1
10 4
PCTV-R
VSS1
VDD1
PWM-
SCLK
*
R131
Q45
DTA144EE
*
C221
471
SP K
VSS
NC
IC15W588A080
C304
DTC144EE
Q33
R124
120P
R SSI
RSSI
B B
10K
C265 *
5
VDD4GND
1
2
3
6
BUSY
OSC
47P
68P
R100 10K
IFI
C145
C42
C32
8P
C132 *
C47 10P
L7 3 T
C228 4P
L9 3T
2
1
R99
13P
471
47R
180R
R16 56K
100K
C124 10P
C40
471
C41
471
150K
C127 9P
C128 9P
C126 8P
C70 3P
L8 3T
NC
7
DATA
COUT
8
CLK
VDD
IC105
NC
356810
IC14
R18
11121612
C4
HT7130-1
C1271
R17
120K
C110471
R4
100R
L11
560nH
C31 3
103
560nH
L64
L68
1uH
C184
102
R153 47K
C209
1uF/10V
R28
47K
27K
R85 100K
T
C72
102
C82
104
10 4
C73
10 2
R58
56 R
C108
471
R26
3.3 K
C83 104
C138
103
102
L21
1K
Q8
DT C144E E
10R
R69
C331
R97
3. 3K
C74 10 2
182
C107102
7
R94 150K
6
5
4
CF1
450 G
3
2
1
R44
1.8K
120K
Q21
KTC4082
R5
C150
102
C13 0
*
R179
220R
103
1
5
XF1
51. 65 MH z
C69
IO
4 3
IO
6
2
C13 1
6P
R180
220R
C3 9
C151
102
L56
0.82uH
R32
0.33uH
L55
R45
*
Q19
3SK318
56K
R71
C36
R243
471
T6
BP F
C216
0.75P
C219
0.5P
C34
471
R93 22R
L13
L54
22R
56nH
R181
*
R182
0R
R189
180R
Q20
3SK318
R190
L34
0R
C220
471
C217
0.75P
C218
2P
L15
4T
C37 471C227 27P
3
4
5
6
7
R12 91KR13 0
1K
SCLK- V
DATA-V
R127
10R
R128
100R
0R
C2 1 2
18P
C303
105
KTC4082
Q1
C200
30P
2SK1824
Q25
L59
330n H
C314
C166
0R
330nH
L69
C319
30P
R36 3
2.7K
C234
225
C163 471
C165
4. 7u F/10V
105
C169
102
27K
R111
3.3K
C211
122
9
FIL I8AF
10
FILO
QUAD
11
DEC
IFO
12
RSSI
C214
13
VCC
NDET
14
MIXOUT
NREC
15
XOUT
GND
16
XIN
MIX I
IC5
TA3 113 6
C171
33 P
C2 6 8
471
5R
8P
471
D21
HV C 350B
L5 3 T
R297
1M
C329
471
D22
HV C 350B
C183
C182 3P
471
L6 3 T
D23
HVC350B
C327
471
C43
471
5R
100 K
R197
R112
R247 100K
*
C44
471
D24
HV C 350B
R84 1 M R103 1M R 107 1MR79 1MR43 1M
C229 1P
C186
471
L10 3T
D26
HVC350B
C261
471
C230 3P
D30
H VC35 0B
C328
471
C46
4.7uF/16V
C45
C189 15K
PS
C188 15K
C187
R502
C290
471
GND
C29 1
471
C292
4.7uF/10V
BUSY
R25
C35
2SC4617
R15
330 K
C38
C51
C153
5R
100K
R239
102
68nH
15K
CK
9
R12010K
DT
10
R12110K
DATA
LE
10K
11
LE
PS
12
R122
PS
13
ZC
R10910K
14
R41
1K
LD/FOUT
15
IC1
MB 15E03SL
P/
MA2S111
16
D15
R/
C164
*
R164220K
R123
10K
OUT IN
UL
R24 4
220R
5C
C193 0.1uF/35V
R202
BLM11A221 S
L44
C33
1u F/10V
D17
RB 706F
Q7
R92
10K
R158
C278
C1 2 2
7P
L53
Q13
2SK1824
R250
*
27K
R42
1K
56K
560R
R40
2.7K
C207
2.2uF/10V
R141
0R
C205
*
R2
2.2K
C204
0.1uF/35V
R11 9
10K
BLM11A221S
L47
RX
C103
102
L50
180nH
D32
*
D10 I SV2 78
D31
D11I SV325
*
C89
*
C19 4
39P
L52220nH
C195
15P
C181
10P
22 nH 2%
L51
420-470M Hz
Q15
2SK508NV(K52)
C12 1
3P
C137 3P
220nH
C206 6P
L29
3.3uH
R91
110R
100R
C10 4
102
C148 1P
5C
Q16
2SJ243
C28
471
R104 100K
D16
MA2S111
R151
C102
471
Q6
2SC4617
4.7K
C208
15uF/6.3V
C26
471
R1 5 0
1K
C23
103
C24 471
5C
D6 HSC277
5T 5T
C301
2P
L57
18nH
C309
4P
C311
8P
C302
3P
L63
18nH
C312
4P
C197
10uF/10V
D14
HZU5ALL
Q18
DTC 144EUA
R24
0R
R169
0.47R
R167
0.47R
R168
0.47R
R145
150K
R146
150K
C1 9 6
100P
R170
150K
R1 4 3
150K
C27
471
R147
150K
R144
150K
R142
15K
4
IC 3 NJM 2904
Aout1A-in2A+in3GND
B+in
Bout
B-in
V+
8
6
5
7
R171
C105
102
C29
471
R173
C68
*
C22
471
R160
1M
C106
102
R105
330K
R39
2.2K
Q17
DTA144EE
R29
105
OSCOUT
OSCI N
R11 7
10K
R14
47K
R90
100R
D12
RKV500KG
L49
R74
C236 1P
5 1
102
5T
BLM21P300S
L39
5T
A A
C198
10uF/6.3V
C12 3
C30
105
C264
102
BLM11A221S
L41
FIN8CLOCK
7
XFIN
6
R96 10R
GND
5
DO
4
VCC
3
C25
105
VP
C190
103
T1PD
T10P D
R102
100K
220nH
R89 100RL18
10 2
4
2
3
BLM11A221S
C100
10R
10P
C31
471
2
1
L20
2
BLM11A221S
C15 4
471
R257 100K
R259
C289 152
*
1
C172
102
R258 33K
R260
0R
R261 0R
C19 1
10uF/6.3V
VCCNOUT
L46
BLM11A221S
C96
102
180n H
L27
D34*
D18*
D8 I S V32 5
R13 47K
D9ISV278
*
C66
C14 4
100P
L36220nH
C142
10P
C180
L30
27nH 2%
C115 0.5P
10P
C88
Q142SK508N V(K52)
C120 3.5P
4P
C98
102
C136
C99
6P
L28
3.3uH
R70 180R
C147 0.5P
R66
180K
Q5
2SC5108(Y)
IC 2 KRX102 U L40
L3227nH
R88
100R
C14
471
20P
R240 100R
L35
C146
471
22P
47nH
R55
3.3K
R625.6K
Q4
2SC5108(Y)
R35 270R
C19 471
L3327nH
R95
R57 3.3KC18
5P
471
R56
HSC277
3.3K
R61
471
5.6K
47K
C13
471
2SC5108( Y)
R37
1K
C11
471
R72
33R
L12
27nH
5P
R36
8.2K
C16
2SC3356
471
R73
22R
C20
471
R38
1K
12n H
C119
100P
L31
C17
471
C134
*
0R
0R
C92
*
39K
R68
C97
102
R54
1.5K
R75 47K
C10
471
BLM21P300S
L24
5T
L38
C12
471
R11
47K
R31
47R
R51
82K
C8
471
C224
4.7uF/16V
L37 BLM21P300S
L25
8T
C9
471
C192
474
C149
103
C21
471
C80
474
C79
103
L26 220nHR34
5T
C15471
270R
C7
471
C65
*
D4
HVC131
HVC131
D5
R1
*
C288
10P
L45
10uH
GND
OUT
VC
VCC
12.8MHz
102
1K
15P
1
C282
C26 3 10 2
3
4
X4
C125
471
C75
R25 6
2
C86
370-420MHz
R241
0R
C14 1
C143
3
C87
D3
C6
R10
Q2
C118
Q3
L23
R23
4
Q12
RD 01 M US1
C95
6.8nH
L16
102
C139
56P
C81
*
2SK3476
C94
27P
C91
9P
C133
15P
C135
8P
D2
*
C116
5P
L4
3T
471
C3
2P
3T
C117
3.5P
4T
C129
4P
3T
C64
*
L17
*
5
Q11
C76
*
C77
*
C78
9P
L1
3T
C93
68P
D1
MA77
C5
C2
2P
L2
C62
1.5P
L14
C63
3.5P
L3
6
CN1
TO ANT
25
Page 26
Page 27
Page 28
PT568 Service Manual
Figure 5 PT568 Top Layer Position Value Diagram
28
Page 29
PT568 Service Manual
Figure 6 PT568 Bottom Layer Position Value Diagram
29
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