Kirisun PT558 User manual

PT558
PROFESSIONAL
TWO-WAY RADIO
V060802
SERVICE MANUAL
FM PORTABLE RADIO

DANGEROUS!
Do not connect the AC power or DC power over 8.6V
with any connector or terminals of the radio. Otherwise it will
cause fire or 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 bigger than 20 dBm (100mW).
Do not turn on the power before the antenna or load
connection is completed.
If the antenna has been damaged, do not use the radio.
Damaged antenna may cause lightly burning on skin.
Though the radio is waterproof, it's better avoid putting it
in rain or snow, or any other liquid to ensure its life and
performance.
STATEMENT
Kirisun Electronic (Shenzhen) Co., Ltd owns the
copyright of KSP20 software. KSP20 software is free for
duplication.
Kirisun Electronic (Shenzhen) Co., Ltd owns the
copyright of the MCU software.
Kirisun Electronic (Shenzhen) Co., Ltd owns the
copyright of the radio outward/structure/circuit design.
Kirisun Electronic (Shenzhen) Co., Ltd owns the
copyright of this service manual. Publication without
authorization is prohibited.
Kirisun Electronic (Shenzhen) Co., Ltd owns the
trademarks KIRISUN
CONTENTS
Chapter 1 Introduction...................................................1
Chapter 2 Radio Overview and Function Keys .................1
Chapter 3 Electrocircuit ..................................................2
Chapter 4 Function Description and Parameter Setting......7
Chapter 5 Service Assemble and Disassemble.................9
Chapter 6 Radio Debugging..........................................11
Chapter 7 Major Specifications......................................13
Chapter 8 Trouble Shooting...........................................13
Chapter 9 KBC-58L Charger.........................................14
Appendix 1 Abbreviations..............................................14
Appendix 2 Spare List..................................................15
Appendix 3 Framework Component List ........................15
Appendix 4 Electrical Component List............................16
Appendix 5 Accessory List............................................21
Figure 1 PT558 Top Board Position Mark Diagram.........22
Figure 2 PT558 Bottom Board Position Mark Diagram....23
Figur3 PT558 Schematic Circuit Pane Diagram............24
Figur4 PT558 Schematic Circuit Pane Diagram............25
Figure 5 KBC-58L Schematic Circuit Diagram................26
PT558 SERVICE MANUAL

1
Chapter 1 Introduction
1.1 Introduction
This manual applies to the service and maintenance of PT558
series of FM mobile radios, and is designed for the engineers and
professional technicians that have been trained by Kirisun. In this
manual you can find all the information of product service. Kirisun
reserves the rights to modify the product structure and specification
without notice in order to enhance product performance and quality.
You can also log on our website www.kirisun.com to download the
latest service manual or contact your local dealer or us.
Read this manual before repairing the product.
1.2 Service Precautions
Safety
Avoid skin contacting with the antenna connector and PCB.
Do not reverse the power polarities.
Do not turn on the power before the antenna and load
connection is completed.
Do not use the radio if the antenna has been damaged.
Contacting the damaged antenna will cause lightly burning on the
skin.
Repairing service can only conducted by professional
technicians.
Electromagnetism Interference
It's prohibited to use or repair the radio in the following
places:
Hospital, health center, air port
Any area with a potentially explosive atmosphere (where the air
contains gas, dust and smog, etc.), such as the storage or
transportation facilities.
Any area of dynamite or exploder.
Component Replacement
All the components used in repair service should be supplied by
Kirisun.
Other components of the same models available on the market
are not surely able to use in this product and we do not guarantee
the quality of the product using such components.
Please fill in a component application forms if you want to apply
for any components from Kirisun.
The following is one sample form that might be used to apply
for any components from Kirisun.
Component Application
PT558-3 FET Q11 RD07MVS1 105-RD07MV-001 1
PT558-3 Triode Q5 2SC5108 Y 104-SC5108-001 1
PT558-3 Belt Clip KBJ-05 1
1.3 Service
All the Kirisun products are subject to the service warranty.
The main unit of the radio is guaranteed for service of 18 months. In
one of the following situations, charge free service will not available.
No valid service warranty or original invoice.
Malfunction caused by disassembling, repairing or
reconstructing the radio by the users without permission.
Wearing and tearing or any man-made sabotage such as
mechanical damage, burning or water leaking.
Product serial number has been damaged or the product
trademark is difficult to identify.
After the warranty expires, lifetime service is still available. And
we also provide service components to service stations.
Chapter 2 Radio Overview and Function Keys
2.1 Radio Overview
LED Indicator
Lights red while transmitting; lights green while receiving a
signal.
Flashes red while in low battery power.
Channel Selector
Rotate to select channel 1-16.
Power/Volume Switch
Turn clockwise to switch on the radio.
Turn counterclockwise till a click is heard to switch off the radio.
Rotate it to adjust the volume after turning on the radio.
PTT (Push-to-talk)
To make a call, press and hold the PTT button, then speak into
the microphone in normal voice.
Release the PTT button to receive a call.
Monitor Button
Press to disable the SQUELCH, and release to enable the
SQUELCH again.
Channel Annunciation Button
Press it in standby state, and the channel number will be
annunciated. If press and hold this button, and at the same time
switch on the radio again, the type of voice annunciation of channel
number will be changed.
Emergency Button
Press and hold this button for over 2 seconds to activate
warning tone. Press it again to exit the emergency alert state.
Note: When warning tone sounds, all of the buttons are
disabled.
Microphone/Speaker Jacks
For connecting external Microphone/Speaker.
Model Component No . Model/
Specifications
Material
Serial
Quantity
No .
PT558 SERVICE MANUAL

2
Chapter 3 Electrocircuit
3.1 Frequency Configuration
Figure3.1 Frequency Configuration
This radio adopts the 2nd Mixer, the 1st IF 49.95MHz, the 2nd
IF 450kHz.
The receiver's first local oscillation is generated by the
frequency synthesizer. The second local oscillation is generated by
the crystal oscillator.
The transmitter signals are generated by frequency synthesizer.
The reference frequency of frequency synthesizer is generated
by TCXO.
3.2 Receiver (RX)
Figure 3.2 Receiver Illustration
The Receiver Front Terminal
Signals from the antenna pass through the RX/TX switch (D1,
D2, D4, D5); and then undesirable out-of-band signals will be
filtered out at the band pass filter (BPF) consisting of C227, L8, L15,
C70, C126, C218, L9, C217, L10, C127; then signals are amplified
at the low noise amplifier (LNA) consisting of Q20 and its peripheral
components.
The output from the LNA passes the BPF consisting of L5, L6,
L7, C228, C124, and C132 for filtering and then is sent to the first
grade frequency mixer (Q19).
MCU produces output voltages and alters the capacitance of
the variable capacitor diodes D21, D22, D23, D24, D26, D30 to
control the center frequency of the band-pass filter.
The First Frequency Mixer
After mixing the receiving signals and the first local oscillation
signals from the frequency synthesizer, the 1st IF signals
49.95MHz are generated. The first IF signals pass the crystal
filter (XF1, XF2) , which will filter the signals of adjacent channel
and those out of band.
IF Circuit
The 1st IF signals from the crystal filter are amplified at the first
IF amplifier (Q21), and then are sent to the IF processing IC (IC5,
MC3361). The IF IC consists of the 2nd frequency mixer, the 2nd
local oscillator, IF amplifier, limiter, phase frequency detector, and
noise amplifier.
IC5 inner circuit and X3 (49.5MHz) compose the 2nd local
oscillator. The 2nd local oscillation (49.5MHz) and the 1st IF signal
(49.95MHz) are mixed at IC5 to generate the 2nd IF 450MHz .
After the 2nd IF signal is amplified and its amplitude is limited at
IC5, and then filtered at porcelain filter (CF1,450kHz), IC5
demodulates and sends out audio signals.
Figure 3.3 IF System
Receiver Audio Signal Processing
IC6 and its peripheral circuit compose the receiver audio signal
processing circuit. IC5 sends audio signals to IC6-C for
amplification, and then to IC4 (CTCSS signaling filtering circuit) and
IC6-D. After the signals are amplified, de-emphasized, filtered at
IC6 and other cells, the HF (high frequency) and LF (low frequency)
will be eliminated, and the remaining 300-3000Hz audio is sent to
Q9 for amplification and then to volume potentiometer for
adjustment and finally sent to the audio amplifier (Ic8).
Figure 3.4 Receiver Audio Processing
Squelch Circuit
Demodulation output from IC5 is sent to the selection frequency
noise amplifier, which consists of IC5 inner noise amplifier and
C107, R124, R152, C33, and C35, to be filtered off the noise. After
being amplified at Q7, noise is sent to D17 and D18 for wave
checking and then sent to MCU, which determines the noise
volume to control the squelch.
Audio Amplifier
IC8 and peripheral components construct the audio amplifier.
Receiving audio signals, voice indication signals, indication tone
signals and warning tone signals are collected for audio
amplification to drive the speaker. Warning tone has no volume
control.
When AFCO is at the high level, Q37, Q8, Q33, and Q38 will be
connected, and IC8 starts working and voice comes out from the
speaker.
Q36: Receiving audio signal switch
Q35: Warning tone switch
Q25: Indication tone switch
PT558 SERVICE MANUAL

3
Figure 3.5 Amplifier and Antenna Switch Diagram
CTCSS Signal Filtering
The IC5 demodulated output audio signals may contain CTCSS
(continuous tone coded squelch system) and DCS (digital coded
squelch). The frequency spectrum of CTCSS/DCS is 2-250Hz. The
filtering circuit constructed by IC4 can filter out the signals out of the
CTCSS/DCS frequency spectrum to ensure MCU to decode
CTCSS/DCS more precisely.
3.3 Transmitter (TX)
Transmitter Amplifier
Figure 3.6 APC Circuit
The modulated signals from VCO are amplified at Q2, Q3, and
Q12 and then are sent to Q11 for amplification. Q11 output power:
4.5W.
The Q11 and Q12 gate offset is controlled by APC circuit.
Changing gate-offset voltage can control the transmitter output
power conveniently.
APC (Auto Power Control)
R167, R168, and R169 are the amplifier current checker; IC3A
is the sample amplifier of the amplification current; IC3B is the
power comparison amplifier.
If the transmitter output power is too big, the amplifier current
will increase, IC3A output will mount, IC3B output voltage decrease,
the offset voltage added to Q11 and Q12 will decrease, and then
the transmitter output power will decrease. Vice versa, such can
ensure steady transmitter output power in different working
circumstances.
MCU changes the input power to IC3B to set the power.
Transmitter Audio Signal Processing
Figure 3.7 Transmitter Audio Circuit
IC7 and the peripherals components construct the transmitter
audio processing circuit. After the audio signals from MIC are
amplified, the amplitude of them is limited, and are filtered, they are
sent to VCO together with CTCSS/DCS for modulation.
D13, D308, and Q24 constitute AGC circuit which decreases
signal amplitude to avoid signal distortion when MIC signal is too
big.
Q34 is the power switch of audio processing circuit. It supplies
power to IC7 only when in transmitting and it is controlled by MCU.
J2 is the external MIC socket. When external MIC is used, the
inner MIC will cut off automatically, but PTT will remain activated.
3.4 Frequency Synthesizer
Figure 3.8 Frequency Synthesizer
The radio adopts PLL (Phase Locked Loop) frequency
synthesizer.
The frequency synthesizer consists of standard oscillator,
voltage controlled oscillator (VCO), programmable frequency
demultiplier, phase comparator, and low pass filter.
Q14, L30, C120, C88, C142, C180, D8, and D9 constitute RX
VCO. D12 is the modulation circuit of VCO.
ICI (MB15E03) is PLL integrated circuit, including
programmable reference frequency demultiplier, programmable
swallowing frequency demultiplier, phase comparator, and charge
pump.
R244, c193, R202, R40, C207, R141, C205, R2, and C204
construct the low pass filter.
The standard frequency is supplied by X4 (TCXO, 13MHz).
The standard frequency fromTCXO (Temperature Control
Transistor Oscillator) are demultiplied by the programmable
reference frequency demultiplier at IC1 to acquire 5kHz or 6.25kHz
reference frequency (controlled by MCU according to the preset
channel frequency).
The oscillation frequency from VCO is sent to IC1, and
demultiplied by swallowing frequency demultiplier and compared
with reference frequency to acquire the error signals. Then pass the
low pass filter and are sent to VCO to change VCO oscillation
frequency to the preset value, and then VCO is locked.
N=FVCO/FR
N Frequency demultiplication times
FVCO VCO oscillation frequency
FR Reference frequency
Check Loss of Lock: When PLL is in loss of lock, IC pin14
sends out low level signals to MCU, which controls the transmitter
not to transmit and initiate warning tome.
Q6: Power filter to supply more pure power to reduce the noise
of the frequency synthesizer.
3.5 Voice Indication Circuit
The radio features voice indication, which is very useful at night
or in the environment of dim light.
PT558 SERVICE MANUAL

4
IC15 is a voice memory chip which stores the voice indication of
channels, and every time you change the channel, the speaker will
sound voice annunciation of the current channel number. Press
voice annunciation key will repeat the voice annunciation of the
current channel number.
If the voice annunciation function has been set, press voice
annunciation key in the stand by mode and the speaker will
sound voice annunciation of the current channel number. If turn on
the radio again with the voice annunciation key pressed, the
voice type will be changed. Repeat turning on the radio with the
voice annunciation key pressed, the voice type will change in the
sequence Chinese Male--- English Male--- Chinese Female ---
English Female ---- No Indication .
3.6 Power Supply
The radio is equipped with 7.4V, 1200mAh battery. The battery
supplies power directly to the transmitter amplifier circuit (Q11, Q12)
and the receiver amplifier (IC8). The power supply of other circuits
is the regulated 5V power.
IC12: 5V low voltage difference, micropower regulator, together
with Q10, and Q30 supply big current 5V power to the whole radio.
Q29: 5T switch, controlled by MCU.
5T: Supplies power for the front terminal of the transmitter.
Q31: 5R switch, controlled by MCU.
5R: Supplies power for the receiver RF amplification, mixing, IF
processing, audio signal processing.
Q32: 5C switch, controlled by MCU
5C: The 5V power controlled by power saving supplies power
for the frequency synthesizer.
3.7 MCU
Figure 3.9 MCU Diagram
MCU controls the working of each unit of the radio to realize all
the radio functions.
Connects with the PC
Accesses the radio status data
Controls PLL to generate the receiving and transmitting local
oscillation frequency.
Accesses the current channel status.
Controls the LED status indication
Controls the power supply of each location
Checks the action of each function key
Generates CTCSS signals
Generates DCS signals
DCS decoding
Squelch check and control
Controls the content of voice indication
2
Memorizer E PROM AT24C08
Memorizes the radio channel data, CTCSS/DCS data, and
other data of function setting and parameter adjustment.
CTCSS/DCS Encoding and Decoding
CTCSS/DCS signals generated by MCU (output form pin5) are
filtered at R155, R156, C242, and C243, and then sent to VCO and
TCXO for modulation.
CTCSS/DCS signals from the receiver are sent to MCU(pin1)
for demodulation. MCU determines whether the signals contain the
same CTCSS/DCS as that set on the radio and decides whether to
turn on the speaker.
Power Adjustment
MCU P56 output is sent to APC part to control the transmitter
output power.
CTCSS
CTCSS (continuous tone control squelch system) is a squelch
control system modulated on carrier wave with continuous subaudio
frequency as pilot frequency. If a channel is set with CTCSS, only
when both the CTCSS of the receiver and that of the transmitter are
identical, communication is available, which avoids interference of
other signals.
39 groups of standard CTCSS frequency is available on the
radio, see Table 3.1.
CTCSS signals generated by MCU pass the low pass filter
consisting of RC to be filtered off the high frequency over 300Hz
and then are sent to VCO for modulation.
Table 3.1 CTCSS Frequency Table
21
1 67.0 131.8
22
2 69.3 136.5
3 71.9 23 141.3
4 74.4 24 146.2
5 77.0 25 151.4
6 79.7 26 156.7
7 82.5 27 162.2
8 85.4 28 167.9
9 88.5 29 173.8
10 91.5 30 179.9
11 94.8 31 186.2
12 97.4 32 192.8
203.5
33
13 100.0
210.7
34
14 103.5
218.1
35
15 107.2
225.7
36
16 110.9
233.6
37
17 114.8
241.8
38
18 118.8
250.3
39
19 123.0
20 127.3
FREQUENCY
(Hz)
No
.FREQUENCY
(Hz)
No
.
PT558 SERVICE MANUAL

Port
Name
Pin
Name
I/O FunctionPin
No
.
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
5
DCS
DCS (digital code squelch) is a kind of continuous digital code
modulated with voice signals on carrier wave to control squelch.
83 groups of standard codes (positive and inverse code) are
available. See table 3.2.
DCS signals generated by MCU (PWM wave shape) pass the
low pass filter to be filtered off the high frequency over 300Hz and
then are sent to VCO and TCXO for modulation. VCO modulates
the high frequency of DCS signals; TCXO modulates the low
frequency of DCS signals.
CTCSS/DCS signals from the receiver are sent to MCU for
modulation. MCU determines whether the DCS encoding of the
receiving signals is identical with that set on the radio and decides
whether to turn on the speaker.
Table 3.2 DCS Encoding List
3.7 Semiconductor Component
MCU Description
Table 3.3 Microprocessor (M38034) Port Description
1 TI P1 I
QT/DQT signal input
2 BUSY P2 I Busy signal input
3 BATT P3 I Battery voltage check
4 ALARM P4 I Alarm key check
5 TO P5 O QT/DQT output
6 BEEP P6 O Beep output/warning tone output
7PF1 P7 I Voice indication key check
8ENC0 P8 I Encoding input
9ENC2 P9 I Encoding input
10 ENC3 P10 I Encoding input
11 ENC1 P11 I Encoding input
12 NC P12 I Not used
13 PTT P13 I [PTT] key input, connected with RXD
14 TXD P14 O RS-232C input
15 RXD P15 I RS-232C input
16 MONI P16 I [MONI] key input
17 SELF P17 I Self programming
L: Model setting mode
18 CNVSS P18 I Connect 10K resistor with VSS
19 RST P19 I Reset input
20 INT0 P20 I Power check input
21 ENC P21 I
Encoding switch selection.
-SEL
Connect the pull down resistor with
VSS.
22 XIN P22 I 7.3MHz Oscillator
23 XOUT P23 O
24 VSS P24 I
Earthing
Clock frequency shift H Open
25 SHIFT P25 O
Final power supply H Open
26 PABC P26 O
VCO crystal selection.
27 OSCSI P27 I
Connect the pull down resistor with
VSS H 13 L 16.8
28 WNTC P28 O Wide/Narrow band control
H Wide L Narrow
29 PS P29 O PLL power saving control H Normal
working L Power saving
2
30 SDA P30 I/O E PROM data wire
2
31 SCL P31 O E PROM clock wire
32 UL P32 I PLL unlock che ck pin H Locked
L Loss of lock
33 DT P33 O PLL data output
34 CK P34 O PLL clock output
35 LE P35 O PLL IC enabl ing pin H Latched
36 5MC P36 O Power control except CPU and
2
E PROM L Open
37 AFCO P37 O
Audio amplification power H:Open
38 RX P38 O TX/RX VCO Selection H Receiving
39 GLED P39 O Green indicator control H Light
40 RLED P40 O Red indicator control H Light
41 SAVE P41 O Battery power saving control
H Power supply L Power saving
42 MUTE P42 O Squelch control
H L Audio squelch
Mic squelch
43 5RC P43 O
eceiving power control L Open
R
44 5TC P44 O
Transmitter power control H Open
45 W588C P45 O
Voice indication H Voice
annunciation of channel
Alert control H Control by voice
46 AC P46 O
volume.It must be in low batterylevel
when in emergency alert state .
D/A output 1
47 DAOUT1 P47 O
D/A output 0
48 DAOUT0 P48 O
D/A output 7 frequency regulated
49 DAOUT7 P49 O
output VCCN
50 DAOUT6 P50 O D/A output6
51 DAOUT5 P51 O D/A output5
52 DAOUT4 P52 O D/A output4
53 DAOUT3 P53 O D/A output3
54 DAOUT2 P54 O D/A output2
55 NC P55 O Not used
56 APC P56
O
TX Auto
power
control output
RX BPF tuning output
57 VCC P57 I CPU power 5V input
58 VREF P58 I Connected with VCC
P59
59 AVSS I Connected with VSS
60 IF_SEL IIF selection. Connect the pull down
P60
resistor with VSS H 49.95 L 21.4
PT558 SERVICE MANUAL

6
3.4 Semiconductor Function Description
IC1 MB15E03 Frequency synthesizer
IC4 NJM2904 APC Voltage comparison, drive
IC5 MC3361 Receiver's 2nd local oscillation, 2nd IF
amplification, amplitude limit,
demodulation, noise amplification
IC6 NJM2902 Receiver demodulation signal
amplification, filtering
IC7 NJM2902 MIC amplification , amplitud e limi t, filterin g
IC8 KIA6278F Receive
r audi
o amplifie
r
2
IC9 AT24C08 E PROM , memor y channe l frequenc y data ,
function setting parameter,
Debugging state parameters
MCU
IC10 M38034
IC11 PST9140NR MCU rese
t circu
it
IC12 HT7150-1 Low voltage difference, low power
consumption, and regulator
IC15 W588A080 Voice storage IC
Q2 2SC5108 Transmitter 1st amplification
Q3 2SC3356 Transmitter 2nd amplification
Q4 2SC5108 VCO buffering amplifier
Q5 2SC5108 VCO buffering amplifier
Q6 2SC4617 VCO power filter
Q7 2SC4738 Noise amplifier
Q9 2SC4617 Receiver audio signals amplification
Q10 2SC1623 5V regulated outp ut current stretcher
Q11 RD07MVS1 Transmitter final power amplifier
Q12 RD01MUS1 Transmitter power amplifier drive
Q17 DTA144EE APC output switch
Q19 3SK318 The 1st frequency mixer
Q20 3SK318 Receiver HF amplifier
Q21 KTC4082 The 1st IF amplifier
Q22 DTC144EE Red LED drive
Q23 DTC144EE Green LED drive
Q24 2SK1824 Voice indication switch
Q26 DTC144EE 5C switch
Q29 KTA1298 5T switch
Q30 KTA1298 5V regulated output current stretcher
Q31 KTA1298 5R switch
Q32 KTA1298 5C switch
Q34 DTA144EE Power switch of MIC amplification unit
Q35 2SK1824 Audio output switch of receiver.
Cut off when in emergency alert state.
Q36 2SK1824 Receiver audio output switch
Table 3.5 Diode Function Description
D1 MA77 Transmitter antenna switch diode
D2 MA77 Transmitter antenna switch diode
D3 HSC277 VCO output switch
D4 HSC277 Antenna switch
D5 HSC277 Antenna switch
D6 HSC277 VCO output switch
D7 HSC277 5V regulated output current stretcher
D8 HVC376B VCO oscillation variable capacitance diode
D9 HVC376B VCO oscillation variable capacitance diode
D12 MA360 VCO modulation diode
D14 HZU5ALL APC output voltage-limiting diode
D15 MA2S111 Loss of lock check diode
D16 MA2S111 VCO power filtering accelerating diode
D17 1N4148 Noise detector
D18 1N4148 Noise detector
D20 LEDGreen Receiving indication
D25 MA2S111 APC individual diode
D28 LED Red Transmitting indication
D29 LEDGreen Receiving Indication
61 BUSY_V P61 I Voice indication of circuit busy check
62 DATA_V P62 I/O Voice indication data
63 SCLK_V P63 I/O Voice indication clock
64 NC Not used
P64 I
Table3.6 XF1 XF2 Crystal Filter Features
Item Specified Value
Nominal center frequency 49.95MHz
Transmission bandwidth 7.5kHz or bigger within 3dB
40dB Barrage bandwidth 20.0kHz or smaller
Pulse 1.0dB or smaller
Insertion loss 3.0dB or smaller
Guarantee attenuation 80dB or bigger within fo-910kHz
Terminal resistance ---
Table 3.7 CF1 LTVPC450EB Features
Item Specified Value
Nominal center frequency 450kHz
6Db bandwidth 3.5kHz or bigger
50dB bandwidth 12.5kHz or smaller
Pulse 2.0dB or smaller within f0 4kHz
Insertion loss 6.0dB or smaller
Guarantee attenuation 35.0dB or bigger within f0 100kHz
Terminal resistance 2.0k
Posi
tion
Type Function Description
Posi
tion
Type Function Description
PT558 SERVICE MANUAL

7
Chapter 4 Function Description and Parameter
Setting
4.1 Major Functions
4.1.1 16 Channels/15 Channels +Scanning Channel
The radio stores 16 channels including one scanning channel.
4.1.2 Scanning Function Control
If you switch the channel to channel 16, the radio is in the
scanning state. After starting scanning, it will pause when receiving
signals.
If you switch the channel to channel 1-15, the scanning function
is inactivated.
4.1.2.1 Carrier Wave Control Scanning
If the radio scanning setting is carrier wave control
scanning , switch the channel to channel 16 to set the radio in the
scanning working mode.
Each channel can be set the scanning added/deleted function
solely: if the setting is scanning added, the channel will be added in
the scanning list; if the setting is scanning deleted, the channel will
not be in the scanning list.
The radio starts scanning from channel 1 to 16 repeatedly in the
consequence of the scanning list. If signals are detected on a
channel ( if the channel is set with receiving signaling the carrier
wave must match the signaling), the radio pauses on that channel
and will restarts scanning 0.5~5 seconds (scanning delay time) after
the signals disappear.
If you switch the channel to channel 1~15, scanning is
inactivated.
4.1.2.2 Time Control Scanning
If the radio scanning setting is time control scanning , switch
the channel to channel 16 to set the radio in the scanning working
mode.
Each channel can be set canning added/deleted function solely:
if the setting is scanning added, the channel will be added in the
scanning list; if the setting is scanning deleted, the channel will not
be in the scanning list.
The radio starts scanning from channel 1 to 16 repeatedly in the
consequence of the scanning list. If signals are detected on a
channel (if the channel is set with receiving signaling the carrier
wave must match the signaling), the radio pauses on that channel
and will restarts scanning 0.5~5 seconds (scanning delay time) after
the signals disappear.
If you switch the channel to channel 1~15, scanning is
inactivated.
Figure 3.8 Semiconductor Component Packaging Illustration: 4.1.2.3 Priority Channel
You can set one channel in the scanning list as the priority
channel, which has the highest priority during scanning. The radio
scans the first non-priority channel in the canning list and then
scans the priority channel, the next non-priority channel in the
scanning list, and then the priority channel again. It goes on
scanning in such sequence.
4.1.2.4 Revert Channel
If you press PTT button when the radio is in scanning state, the
radio will transmit on the revert channel , which has 6 types:
Selected channel: The first channel in the scanning list.
Selected channel + current channel: If the radio is in the state of
scanning pause, it will transmit on the current communication
channel. Otherwise it will transmit on the first channel in the
scanning list.
Priority channel: The radio will always transmit on the priority
channel set in the scanning list when pressing PTT.
Priority channel + current channel: If the radio is in the state of
scanning pause, the radio will transmit on the current
communication channel. Otherwise it will transmit on the priority
channel in the scanning list.
Last called channel: The last channel that received signals.
Last called channel + current channel: If the radio is in the state
of scanning pause, the radio will transmit on the current
communication channel. Otherwise it will transmit on the last called
channel.
The current communication channel is the channel on which the
radio pauses in the 4 following situations:
1 When the radio receives signals and does not restart
scanning, the radio will stay on the current channel.
2 The radio will stay on the current channel during 0.5~5
seconds (scanning delay time) after signals disappear.
3 The radio will stay on the current channel when pressing
the PTT during scan.
4 After releasing the PTT to end transmitting, during the
preset transmitting dwell time, the radio will stay on the current
channel. After the preset transmitting dwell time 0.5~5 seconds, the
radio will restart scanning again.
4.1.2.5 Retrace Period
If the priority channel has been set in the scanning list and
retrace period is also set, when the radio receives signals on a non-
priority channel and pauses scanning, it will retrace the priority
channel in a certain period (0.3~5s). If signals are detected on the
priority channel, it will stay on the priority channel; if no signal is
detected on the priority channel, it returns to the original channel it
stays on.
4.1.3 CTCSS/DCS
CTCSS/DCS can realize selective calls and group calls. On the
same channel, only the two parties whose CTCSS/DCS are
identical can communicate. CTCSS/DCS signaling code on the
channel is preset.
4.1.4 TOT
The purpose of the time-out timer is to prevent any single
person from overlong using a channel to transmit and affecting the
whole group communication.
If the radio transmits longer than the preset TOT time limit, the
radio will stop transmitting and warning tone sounds. To stop the
warning tone, release the PTT button. Press the PTT again you can
resume transmitting.
4.1.5 Auto Power Saving
When no signals are being received or no operations are being
PT558 SERVICE MANUAL

conducted for over 10 seconds, the battery power saving will be
activated. When it is receiving signals or in operating state, battery
power saving is inactive.
4.1.6 Low Battery Warning
When the battery power appears low, the indicator flashes. If
the battery power is lower than the preset value during transmitting,
the status indicator flashes red. When the speaker sounds warning
tone, the radio will stop transmitting.
4.1.7 Monitor
When no signals are being received, the radio squelch circuit
mutes the speaker.
Press the MONI key to cut off the squelch control circuit, and
you will hear noise from speaker (no mater whether there are
signals). Such operation is very useful when you want to adjust
voice volume or receive weak signals (to avoid voice intermittence
when in weak signals).
When you press the MONI key, the green indicator lights, and
the radio is in the state of monitoring.
4.1.8 Busy Channel Lockout
If busy channel lockout has been activated, transmitting
signals is prohibited on the busy channel. If you press the PTT to
transmit on the busy channel, the speaker will sound busy channel
lockout tone, and you cannot transmit signals.
4.1.9 PC Programmable
You can program the radio functions and adjust some
parameters by PC programming software KSP20.
4.1.10 Wired Clone
The radio can transfer the stored data to another radio of the
same mode by a specified cable.
4.1.11 Squelch Level Selection
The purpose of the squelch is to mute the speaker noise when
no signals are received or the signals are weak. When the squelch
is activated, you can hear noise from the speaker; when the
squelch is inactivated, you will not hear noise form the speaker.
Selecting the squelch level is to select which the signal strength
level is strong enough to enable the squelch or weak enough to
disable the squelch. Over high squelch level will make the radio
unable to receive signals efficiently when signals are weak; over low
squelch level will make the radio communication affected by noise
or other irrelevant signals. The squelch level has 0-9 options.
4.1.12 Beep Tone
This option controls power on tone, channel busy tone and TOT
tone.
4.2 Parameter Setting (PC Mode)
The radio parameters have been programmed in the factory.
The user can program the radio parameters such as working
frequency, channels, CTCSS/DCS, auto scanning. We designed a
user friendly and convenient Chinese/English programming
software KSP20 for users to set parameters on the radio. The
programming steps are as follows:
a.Install the programming software KSP 20 on the computer.
b.Connect the radio to the computer serial port with the
specified programming line (KSPL02). See Figure 4.1
a.Turn on the computer power.
b.Turn on the radio power.
c.Click the KSP20 program to run the programming software.
d.Click the Tools in the KSP20 pull-down menu, and click
Read Data to read the radio parameters into the computer;
click Write Data to transfer the PC programming parameters
into the radio.
e.You can program the following parameters with the KSP20
software.
1) The RX and TX frequency of each channel.
2) The receiving and transmitting signaling of each channel.
3) Busy channel lockout option.
4) TOT
5) Squelch level option.
6) Power saving option.
7) Beep tone option.
8) Monitor mode option.
9) Scan mode option.
10) Scan the revert channel option.
11) Scan the priority channel option.
For more details, please refer to the Help in the KSP20
software.
Notice:
1) Turn off the radio before connection.
2) When the radio is being read data, the indicator lights green
and it's prohibited to press the PTT button; when the radio is being
written data, the indicator lights red.
3) Before the first time editing, you should read data form the
radio and backup the data.
4) If the radio cannot work normally after being written in with
the editing data, open the data backup and rewrite the backup into
the radio.
5) Model information is important radio data and is prohibited to
modify.
6) After programming, you need to turn on the radio power
again to make the radio resume the normal work.
4.3 Computer Test Mode:
Connect the radio to the radio communication port with the
specified programming line (KSPL02). See Figure 4.1.
Warning: Before enter the computer test mode, connect a HF
load of 50 to the radio antenna connector or connect the radio to a
comprehensive test device.
Under the computer test mode, you can modify the following
parameters with KSP20 programming software:
1) Frequency tuning;
2) Transmitting power;
3) Low voltage threshold;
4) The 9th squelch level;
5) The 3rd squelch level;
6) Sub-audio wide band modulation degreed;
7) Sub-audio narrow band modulation degreed;
8) Wide band sub-audio center.
4.4 Wired Clone (It can be prohibited by programming
software)
When the wired clone function is activated, the radio can enter
the wired clone mode. After entering the wired clone mode, the
Programming
Line (KSPL02)
PC
(RS232 Serial
Port)
Radio
(Speaker/ Mic
Socket)
8
PT558 SERVICE MANUAL

9
radio will not exit it automatically and you have to turn on the radio
again to enter the user's mode. Operating steps are as follows:
1) Turn on the radio with the MONI key pressed, and 2 seconds
later the red light flashes twice and two beep tones sound, and then
the radio enters the wired clone mode.
2) Press the PTT button on the host radio to activate/inactivate
the wired clone mode on the sub radio. But the wired clone mode of
the host radio will not be changed. When pressing the PTT button,
the green light flashing twice and one beep mean to activate the
clone mode; the red light flashing twice and two beeps mean to
inactivate the clone mode. When entering clone mode, the default
setting of the sub radio receiving data is to prohibit wired clone
mode.
3) Press the MONI key, red light flashes, and it starts cloning.
After cloning is finished, the red light turns dim.
Note: You can activate/inactivate the wired clone mode. Short
circuit the two SELF terminals, enter the model setting mode and
then the manually adjustment function and wired clone function will
become active automatically. If you press the MONI key at this
moment, the wired clone function will be prohibited.
You can also activate/inactivate the wired clone mode by PC
programming software.
If the wired clone function has been prohibited, it cannot enter
the wired clone mode. The wired clone mode has been prohibited in
the factory.
The cloning data includes all the data in 4.2 Parameter
Setting but the adjustment parameters in 4.3 Computer Test
Mode .
Chapter 5 Service Assemble and Disassemble
The radio is a precision communication equipment. Please be
careful when assemble or disassemble the radio during service.
5.1 Removing and Installing the Battery
To remove the battery, push the latch upwards and remove the
battery away from the radio. (See Figure 5.1)
Figure 5.1
To install the battery, match the tow bulges at the bottom of the
battery with the corresponding grooves at the radio aluminum alloy
frame and insert it in. Then press the upper end of the battery till the
latch secure.
5.2 Removing and Installing the Belt Clip
To remove the belt clip, use your nail or a tool to lift the metal
spring piece in the belt clip from the topside, and then pull the belt
clip away from the radio.
To install the belt clip, match the upper head of the belt clip with
the glides on the rear of the battery, and then press the belt clip
downwards to lock it in place. (See Figure 5.4)
5.3 Removing the Casing from the Chassis
1) Remove the knobs;
2) Remove the two knob nuts and the antenna nut;
3) Remove the two cross head screws that fix the top cover at
the top;
4) Remove the two cross head screws that fix the aluminum
alloy frame at the bottom;
5) Pull the aluminum alloy frame out of the casing.
See Figure 5.5
Figure 5.5
5.4 Remove the Chassis from the Main Board
1) Remove the screw of from the PCB;
2) Melt the solder at the antenna point with a electric soldering
iron and take off the main board;
3) Take away the two screws and the antenna connector.
See Figure 5.6.
Host Radio Sub Radio
Cloning Line
Figure 5.2 Figure 5.3
Figure 5.4
Figure 5.6
PT558 SERVICE MANUAL

2
1
1
2
1
1
1
1
1
2
2
1
1
1
9
1
2
1
1
1
1
1
1
44
43
42
41
40
39
38
32
33
34
35
36
37
24
23
22
25
26
27
28
29
30
31
AL LABLE
M2 SCREW
AL LABLE
NEGATIVE POLE CHIASSIS SPACE
ALUMINUM CHASSIS
ANTENNA SPRING
WATERPROOF WASHER
INSULATING WASHER
M1.7 SCREW
POSITIVE POLE CHIASSIS SPACE
POSITIVE TERMINAL WASHER
WASHER
POSITIVE TERMINAL FRAME
WASHER
WASHER
M2 SCREW
M2.5 SCREW
PUSH FASTENER
PUSH FASTENER SPRING
TOP COVER
AL ALLOY LABLE
PCB BOARD
WATERPROOF LABLE
204-000558-R03
301-20080G-R01
401-0201C1-R06
201-000558-R05
203-003208-R04
203-005583-001
203-003208-R01
202-000558-R07
201-000558-R07
202-000558-R06
202-000558-R08
203-003208-R02
302-17040G-001
202-003208-007
204-003208-R05
204-000558-R04
204-000558-R02
204-000558-R05
203-000558-005
201-000558-014
301-25050J-R01
301-20040G-001
1
1
1
1
2
2
1
2
1
1
1
2
1
1
1
2
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
21
20
19
18
17
16
EMERGENCY BUTTON COVER
EMERGENCY BUTTON
LIGHT PIPE
SPEAKER
SPEAKER WATERPROOF NET
MODEL LABLE
PTT BUTTON FRAME
PTT BUTTON
SPEAKER SPRING
LOGO LABLE
ANTENNA WASHER
SWITCH WATER PROOF WASHER
ANTENNA NUT
SWITCH NUT
KNOB CIRCLIP
VOLUME KNOB
MIC COVER
MIC CAP
MIC WASHER
FRONT COVER
CHANNEL KNOB
202-000558-R03
201-000558-R08
201-000558-R09
201-005583-004
121-100000-007
204-000558-R01
201-000558-R03
204-006800-006
202-000558-R09
202-000558-R01
201-000558-R02
203-003208-009
203-000558-R02
203-005583-R02
202-000558-R04
204-005583-001
401-0101E1-R57
203-000558-004
202-000558-R02
201-000558-R04
401-0101E1-R58
QTY
NO. DECRIPTION
MATERIAL NO.
5.7 Exploded View
10
PT558 SERVICE MANUAL

11
Chapter 6 Radio Debugging
Before test/debugging, make sure all the equipments have
been well connected to the ground.
Before test/debugging, make sure the antenna output terminal
has been connected properly to the corresponding devices and load.
The transmitter output must pass RF power attenuator before
being connected to the standard signal source/ frequency deviator/
frequency spectrum.
When testing the receiver, make sure not to conduct
transmitting operation.
When in debugging/testing/service, make sure static free
measures for human body and equipments.
6.1 Service Equipment and Software.
The following equipments and software in Table 6.1 are
necessary for the service and test of the radio.
Table 6.1 For Test and Service Equipment and Software
Figure 6.1 E xternal Speaker/Mic Connector Def in it io n
The equipments in item 6, 7, 8, 10, 11, and 12 can be replaced by a
comprehensive test instrument.
6.2 Debugging Items
During the course of maintenance, the radio needs to be tested
and debugged after replacing components. Some certain radio
parameters can be modified (computer mode) with our KSP 20
programming software. The modifiable parameters are as follows:
1) Frequency difference
2) TX power
3) Low battery power warning threshold
4) Squelch level
5) CTCSS frequency deviation
6) DCS frequency deviation
Debugging Procedures
a.Enter the computer test mode. Access method refers to the
instruction in 4.2 parameter setting.
b.Select the Test Mode option to enter the computer test
mode.
c.Select the options that you want to adjust and adjust the
parameters on the computer.
d.After adjustment, exit the computer test mode.
6.3 Debugging
6.3.1 VCO Modification
Turn off the power saving mode. Set the frequency at the low
frequency . In receiving status, test the PD power with the digital
multimeter. Adjust the trimming capacitor C180 to make the PD
power at 1V 0.1V.
Set the TX frequency at high frequency , press the PTT button,
test the PD power with the digital multimeter. The power should
lower than 3.5V.
6.3.2 PLL Frequency Adjustment
Under the computer test mode, select frequency tune
option and click adjustment to enter. Adjust the TX frequency
among 0~255 to the specified value. (Frequency error should less
than 200Hz.)
6.3.3 TX Frequency Adjustment
Under the computer test mode, select high power, low
frequency and click adjustment to enter. Adjust the TX power
among 0~255 to 4W. And watch the working current and make sure
it not higher than 1.5A.
Adjust high power, medium frequency , high power, high
frequency to set the TX power at 4W.
6.3.4 TX Low Power Warning
Adjust the power to 6.8V.
Under the computer test mode, select the low power
threshold , and click adjustment to enter. Adjust the figure
among 0~255 to make the red light flash.
6.3.5 Frequency Deviation Adjustment
Input 100mV, 1000Hz audio signals from the radio MIC, and
adjust the potentiometer VR2 to set the TX frequency deviation at
2.2kHz.
6.3.6 DCS TX Signal Wave Shape and Frequency
Adjustment
Under the computer test mode, select DCS wide band
modulation and click adjustment to enter Adjust the
PT558 SERVICE MANUAL
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Item
Computer
Programming
Software
Programming
Line
Cloning Line
DC Regulated
Power
RF power meter
Frequency Meter
Frequency
Deviator
Digital Multimeter
Audio Signal
Generator
RF power
Attenuator
Standard signal
source
Oscillograph
Audio voltmeter
Specifications
Higher than P2, compatible with IBM PC
WINDOWS 98/ME/2000/XP
KSP-20
KSPL02
KCL01
Output voltage 7.5V, Output current 5A
Test range 0.5---10W
Frequency range 100MHz500MHz
Impedance 50 SWR 1.2
Frequency range: 0.1600MHz
-6
Frequency precision: Higher than 1X10
Sensitivity: Higher than 100mV
Frequency range DC600MHz
Test range:0-- 5kHz
Input impedance:Higher than 10M /V DC,with the
ability of testing voltage, current, impedance.
Frequency range: 2---3000Hz
Output level: 1---500mV
Attenuation: 40dB or 50dB
Supporting power: Bigger than 10W
Frequency range: 10MHz---1000MHz
Output level: 0.1uV~32mV (-127dBm~ 17dBm)
Frequency range DC~20MHz
Test range 10mV~20V
Test range 10mV~10V

12
potentiometer VR1, and watch the demodulation signals. The wave
shape should be smooth (close to square wave) and then adjust the
figure to set the frequency deviation at 0.35kHz.
6.3.7 CTCSS Frequency Deviation Adjustment
Under the computer test mode, select CTCSS wide band
modulation , and click adjustment to enter. Adjust the figure to
set the frequency deviation at 0.35kHz.
6.3.8 Receiver Sensitivity
Repeat adjusting L9, L10, L6, and L5 to make the frequencies
at highest sensitivity.
6.3.9 Receiver Squelch Setting
Under the computer test mode, select the 9th squelch and
click adjustment to enter. Input the receiver with the signals of
1kHz modulation frequency, 3kHz frequency deviation, and -
117dBm level. Adjust the figure to make the green light flash.
Under the computer test mode, select the 1st squelch and
click adjustment to enter. Input the receiver with the signals of
1kHz modulation frequency, 3kHz frequency deviation, and 124dBm
level. Adjust the figure to make the green light flash.
6.4 Debugging
The above debugging refers to Table3, Table4, and Table 5.
Table 6.3 Voltage Controlled Oscillator (VCO)
Table 6.4 Receiver
Band
Pass
Filter
Spectroan-
alizer/
Item Test
Condition
Test
Equipment
Test
Point
Adjustment
Part
Require
-ment
Note
Setting
Battery
Power:
7.5V
Multimeter
PD
Locked
CH:RX
Low
Frequency
C180 1.0V 0.1V
Watch
Adjust
-ment
Digital
Power
Item Test
Condition
Test
Equipment
Test
Point
Adjustment
Part
Require
-ment
Note
Compreh
-ensive
Test
Device
Before
Mixing
L9 L10
L7 L6
L5
ModePass
Band
25MHz,
smooth
wave
Shape
Not
recom-
mend
the user
to adjust
it!
Audio
Level
Ch: RX
center
frequency
RF OUT
-53dBm
(501 V)
MOD:1kHz
DEV: 1.5
(kHz)
Audio
Load:16
RF Audio
Signal
Generator
Oscillator
Speak
er
Conne
ctor
(Turn the
volume
knob
clockwise)
Audio
power
0.3 W
Inner
speake
r power
1.2W
High
Frequency
CH:TX Lower
than 3.5V
Item Test
Condition
Test
Equipment
Test
Point
Adjustment
Part
Require
-ment
Note
CH: MF
Sensit
ivity CH: LF
CH: HF
RF OUT:
-116dBm
(0.35 V)
MOD:1kHz
DEV:
1.5kHz
(W/N)
RF Audio
Signal
Generator
Oscillator
Audio
Voltmeter
Distortion
Test
Device
/Comprehe
nsive Test
Device
Speak
er
Conne
ctor
SINAD
12dB or
higher
Ch: RX
Center
Frequency
Squel
ch
Activa
tion
Sensit
ivity
Computer
Test Mode
After
adjustmen
t, squelch
activation
is normal.
Computer
Test Mode
9th
RF OUT:
-117dBm
After
adjustment,
squelch
activation
is normal.
3rd
RF OUT:
-124dBm
Item Test
Condition
Test
Equipment
Test
Point
Adjustment
Part
Require
-ment
Note
Table 6.5 Transmitter
TX
Frequ
ency
Frequency
Meter/
Comprehe
nsive Test
Device
Anten Computer
Test Mode
Within
200Hz
±
Power Power
Meter/
Comprehe
nsive Test
Device/
Ammeter
Computer
Test Mode
Adjust to
4W
Within
200H
z
±
Maxim
um
Modul
ation
Frequ
ency
Deviati
on
CH: TX
Center
Frequency
AG:1kHz/
70mV
Frequency
Deviation
Meter/
Comprehe
nsive Test
Device
Adjust to
±2.2kHz
±200
Hz
Modul
ation
Sensiti
vity
AG:1kHz/
7mV
Checking
frequency
deviation:
1.1kHz~
2.0kHz
Wave
shape is
close to
smooth
square
wave.
DCS
Wave
Shape
(Balan
ce)
Oscillator /
Comprehe
nsive Test
Device
VR1
PT558 SERVICE MANUAL
VR2
L9 L10
L7 L6
L5

13
Chapter 7 Major Specifications
7.1 General Specification
Model PT558-03
Frequency 446MHz
Modulation 11K F3E
Number of Channels 16(15+S)
Channel Spacing 12.5 kHz
MF 1st MF 49.95 Mhz 2nd MF 450kHz
Working Voltage 7.5V negative grounding
Working Temperature -25 ~ +55
Antenna Impetance 50
Mic Impedance 2k
Battery (Standard) Model: KB-58A, Li-Poly Battery DC 7.2V ,
1200mAh
Dimension (WXHXD) 56 mmx120 mmx29 mm
Weight 235 With battery and Antenna
7.2 Receiver
Item Test
Condition
Test
Equipment
Test
Point
Adjustment
Part
Require
-ment
Note
CTCSS
DEV
CTCSS:
67Hz
Battery
Power
Warnin
g
Adjust
to 0.35kHz
±
After
adjustment,
the indicator
flashes.
±50Hz
Battery
Terminal:
6.8V
Computer
Test Mode
DCS
DEV
DCS
023N
Frequency
Deviation
Meter/
Comprehe
nsive Test
Device Adjust
to 0.35kHz
±±50Hz
Anten
na
Chapter 8 Trouble Shooting
No
display
after
switching
on the
radio.
A. Battery power may be insufficient. Recharge or
change the battery pack.
B. The power switch is broken, and please change it.
C. The CPU is broken, and please change it.
D.The regulator IC12 is broken, and please change
it.
PLL is
unlocked.
(Beep
sounds)
A. The PLL crystal oscillator C4 is broken, and please
change it.
B. The oscillatingtube is broken, and please change it.
C. The oscillatingtube is broken, and please change it.
Cannot
talk to or
hear
other
group
members.
A. Make sure the two communication radios are
using the channel of the same frequency.
B. Make sure the CTCSS/DCS tone is the same as
that of your group members.
C. Out of the effective communication range.
Cannot
receive
signals.
A. The antenna is not well connected, and please
screw the antenna again until secure.
B. The sensitivity is too low and minitrim L9, L10, L7,
L6, and L5.
C.HF amplifier Q20 is broken, and please change it.
D. The squelch level is too high and the squelch
cannot be activated. Reset the squelch level with a
computer.
E. Mixer tube Q19 is broken, and please change it.
F. MF processing chip IC5 is broken, and please
change it.
1
2
3
4
PROBLEM
SOLUTION
No.
Available Sensitivity
(12dBSINAD)
Squelch Activation
Sensitivity
Receiver Surplus
Output
Modulation Receiving
Bandwidth
Adjacent Channel
Selectivity
Intermediation
Reject Ratio
Spurious Response
Reject Ratio
Audio Output
Power
Receiving Current
Sinking
Standby Current
(Average)
0.35 V
0.20 V @level 3 squelch
-40dB
3.5kHz
60dB
60dB
70dB
500mW @distortion 5% 4
250mA
25mA
RF Power
Frequency Stability
Maximum Modulation
Frequency Deviation
Modulation Sensitivity
Modulation
300~3000Hz
Adjacent Channel
RF Power
Spurious and
Harmonics
Residential Frequency
Modulation
Transmitting Current
Sinking
4.0W @7.5V DC
-6
2.5x10
2.5kHz
16mV
3%
-60dB
-70 dB
-40 dB
1.8A @ 7.5V DC
PT558 SERVICE MANUAL

14
PROBLEM
SOLUTION
No.
The
indicator
lights red
when in
transmitti
ng but no
voice can
be heard.
A. The power amplifier tube Q11 is broken and
there is no power output and please change it with
a new tube.
B. The microphone is broken, and please change it
with a new one.
C. The operational amplifier IC3 is broken, and
please change it with a new one.
The
indicator
lights
green
when in
receiving
but no
voice can
be heard.
A. The speaker is broken, and please change it
with a new one.
B. The audio amplifier IC8 is broken and please
change it with a new one.
C. The switch tube Q36 and Q35 is broken, and
pleas change it with a new one.
D. The operational amplifier IC6 is broken, and
please change it with a new one.
Cannot
program
the radio
parameter
s
normally.
A. Make sure the programming cable is well
connected.
B. The computer RS-232 serial port output is
unmoral, and please fix the computer.
C. The MIC is not well connected with the SPK
socket. Check the socket and if it is unable to work
normally please change it with a new one.
5
6
7
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 electrically 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
Chapter 9 KBC-58L Charger
9.1 Charger Specifications
A) Idling Input Current: 30mA
B) Charging Terminal Maximum Idling Voltage: 8.8V
C) Constant current charging: 200 270mA
D) Maximum Charging Time: 7 hours
E) Maximum Charging Voltage Limit: 8.45 0.1V
9.2 Charging and Charging Indicator
A) When DC inputs power voltage 14~20V, the indicator lights
yellow.
B) When the battery is inserted into the charger, the red and
yellow indicator lights. (The battery power is lower than 8.1 0.1 V. )
(When the voltage is lower than 6.0V, the red indicator become light
slowly after about 20 seconds.)
C) When the battery voltage is lower than 8.1 0.1 V, the
charger charge the battery with constant current. (Charging current
is 200 270mA. It needs 3~4 hours to charge a battery that has
been discharged completely.)
D) When the battery voltage is higher than 8.1 0.1 V, the
charging current will decrease gradually; when the battery voltage is
8.2 8.4V, the charging current will decrease quickly; when the
battery voltage is 8.4 8.5V, the charging current will close to zero
(then the charger begins constant voltage output) and charging
stops. This course takes about 2~3 hours.
E) When the battery voltage is 8.2 8.4V, the red, yellow and
green indicator lights. When the battery voltage is 8.3 8.5V, the
red indicator becomes dime and the green and yellow indicator light.
LED red: Charging indication
LED yellow: Power indication
LED green: Charging completion
Note: After putting the battery pack that has been discharged
completely into the charger, its red indicator needs about 1~2
minutes to turn light.
PT558 SERVICE MANUAL
Red
Yellow Green
DC input

15
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Material Serial No.
201-000558-R02
201-000558-R03
201-000558-R05
201-000558-014
202-000558-R01
203-005583-R02
203-005583-R02
203-000558-005
203-003208-R02
203-003208-R04
301-20040G-001
301-20080G-R02
301-25050J-R01
302-17040G-001
102-MC3361-R01
103-L190YG-R01
103-MHC190-R02
104-MT717T-001
104-TA1298-R01
105-RD01MU-R01
105-RD07MV-R01
106-RD835E-001
108-455C24-R01
108-CF450H-R01
108-XF4995-R01
110-110473-R01
110-110683-R01
110-220103-008
121-200000-001
122-113M00-001
122-17M300-R01
122-249M50-001
124-050000-005
124-050000-R04
603-0W558A-001
Name/Specification
PT558 volume knob / PC+ABS,black
PT558 encoder knob / PC+ABS,blak
PT558 upper cover / PC+ABS,black
PT558 latch / PC+ABS,black
PT558 Earpiece-Mic jack panel cover / black silica gel(enhanced elasticity)hardness70
Pt558 antenna nut£¬
PT558 witch nut£¬brass£¬black passivation
PT558 latch spring, carbon spring steel wire¡Ó0.35£¬nickle plating
PT3208 positive terminal£¬phosphorus copper gold plating
PT3208 negative terminal£¬phosphorus copper gold plating
Woven belly-tooth screw,M2.0x4.0 flat round cross head, nickle plating
Woven belly-tooth screw,M2.0x8.0 flat round cross head, nickle plating
Woven belly-tooth screw,M2.5x5.0 flat round cross head,black zinc plating
Self-tapping screw,¦Õ1.7x4.0 flat round cross head nickle plating
IF(MF) modulation IC/MC3361BP,lead-free
Chip LBD/ 0603,green,CL-190YG-CD, lead-free
Chip LBD/ 0603,red,HSMH-C190,lead-free
Chip triode / FMMT717TA
Chip triode / KTA1298(Y),lead-free
Chip FET(field-effect transistor)/ RD01MUS1,lead-free
Chip FET(field-effect transistor)/ RD07MVS1,lead-free
Carbon-film encoder switch / RD835E-GA1-16C-0F01 18mm BAND HONGHUA
Plug-in phase frequency detector/ JTBM455C24,lead-free
Plug-in porcelain filter/ LTM450HT,450kHz¡À3kHz,lead-free
Plug-in IF filter / 49.95MHz 7.5KHz,U-5*2,lead-free
Chip trimming resistor/ MVR22HXBRN473,47K 25%,B Linear,lead-free
Chip trimming resistor/ MVR22HXBRN683,68K 25%,B Linear,lead-free
Volume switch / RD810S-JA1-A103-0C61
MIC / B6027AP402-65
Chip transistor / 13MHz 2.5PPm
Chip crystal resonator/ CSTCR7M30G53-R0,7.3M,lead-free
Plug-in crystal oscillator/ 49.5MHz 10PPM,UM-1
2.5mm Eearphone socket/ SP/MIC,EJ-2507-CCPA
3.5mm MIC socket / SP/MIC,ST-212,lead-free
Voice recording IC IC / W588A080,binding
Position
PCB, antenna head, negative
terminal screw
Aluminium alloy bracket fixing
Upper cover fixing
Positive terminal screw
IC5
D20, D29
D28
Q8, Q30
Q29, Q31, Q32
Q12
Q11
SW2
L57
CF1
XF1, XF2
VR2
VR1
SW1
MIC1
X4
X2
X3
J1
J2
Ic15
Quantity
1
1
1
1
1
1
2
1
1
1
9
2
2
1
1
2
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
No. Material Serial No. Description Position Quantity
Appendix 2 Spare List
Appendix 3 Framework Component List
PT558 SERVICE MANUAL
121-100000-R11
201-000558-014
201-000558-R02
201-000558-R03
201-000558-R04
201-000558-R05
201-000558-R07
201-000558-R08
201-000558-R09
201-005583-004
202-000558-R01
202-000558-R02
202-000558-R03
Speaker / 428648,4 ,0.5W, 40,lead-free
PT558 push fastener / PC+ABS,black,060522 remould
PT558 volume knob / PC+ABS,black,lead-free
PT558 channel/encoder knob / PC+ABS,black,lead-free
PT558 PTT cover / PC+ABS,black,lead-free
PT558 top cover / PC+ABS,black,lead-free
PT558 positive pole terminal chassis / PC+ABS,black,lead-free
PT558 emergency button press panel/ PC+ABS,black,lead-free
PT558 light guide lens/ PMMA,transparent,lead-free
PT558-03 front cover / PC+ABS,black,(to fix the 558 antenna), 060605 remould
PT558 jack panel cover/ black silica gel(enhanced elasticity), hardness 70,lead-free
PT558PTT button / black silica gel,hardness 50,lead-free
PT558 emergency button/ orange silica gel(enhanced elasticity),hardness 60,lead-
free
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13

16
Appendix 4 Electrical Component List
PT558 SERVICE MANUAL
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
202-000558-R04
202-000558-R06
202-000558-R07
202-000558-R08
202-000558-R09
202-003208-R07
203-000558-005
203-000558-R02
203-003208-009
203-003208-R01
203-003208-R02
203-003208-R04
203-005583-001
203-005583-R02
204-000558-R01
204-000558-R02
204-000558-R03
204-000558-R05
204-005583-001
204-006800-006
301-20030G-003
301-20040G-001
301-20080G-R02
301-25050J-R01
302-17040G-001
602-005583-004
710-445447-005
204-000558-R04
PT558 switch waterproof washer / black silica gel,hardness 60,lead-free
PT558 chassis waterproof gasket/ black silica gel,hardness 60,lead-free
PT558 big waterproof washer/ black silica gel enhanced elasticity ,hardness
40,lead-free
PT558 positive/negative terminal spacer/ black silica gel,hardness 40,lead-free
PT558 micropohone seal /orange silica gel,hardness 40,lead-free
PT3208 insulating spacer / thermally conductive rubber,2*6*9,blue,lead-free
PT558 push fastener spring / carbon spring wire 0.35,nickle plating
PT558 switch nut / brass,black passivation,lead-free
PT3208 knob retaining ring, / stainless steel ring ,0.18THK
PT3208 antenna terminal/ stainless steel nickel plating,PT3208446 ,lead-free
PT3208 positive pole terminal/ phosphorus copper gold plating,lead-free
PT3208 negative pole terminal /phosphorus copper gold plating,lead-free
PT558-03 Al alloy chassis / ADC12,abrasive, polished, (558 fixed antenna)
PT558-03 antenna nut /hexagon brass,black passivation,lead-free
PT558 speaker waterproof net/ black waterproof cloth,lead-free
PT558 waterproof spacer/ PORON,black,self-adhesive 0.8THK,lead-free
PT558 rating plate1 / PVC black,self-adhesive 0.3THK,lead-free
PT558 rating plate / PVC,black dull, 0.1mm thick, self-adhesive,lead-free
PT558-03 antenna terminal spacer/ black sponge,4mm thick,self-adhesive(to fix
the 558 antenna)
PT6800 MIC spacer / dustproof net,black
Woven belly-tooth screw/ M2.0*3.0 flat round cross head nickel plating,diameter
3.2
Woven belly-tooth screw/ M2.0*4.0 flat round cross head nickel plating
Woven belly-tooth screw/ M2.0*8.0 flat round cross head nickel plating
Woven belly-tooth screw/ M2.5*5.0 flat round cross head nickel plating
Self-tapping screw/ M1.7*4.0 flat round cross head nickel plating
PT558-03 electronic material / 446MHz,0.5W/4W,narrow
band,RD07+RD01,M38039FFHFP(FLASH)
Antenna / 558-03 fixed antenna,445-447MHz,cold-resistant material,no colored
dot,6.0 bottom exposed
Potentionmeter washer
2
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
8
2
2
1
1
1
2
Under the FET (field-effect transistor)
Negative termianl screw
PCB, antenna connector
To fix the Al alloy chassis
To fix the top cover
Positive terminal screw
1
1
1
1
1
1
1
3
1
1
1
1
1
1
3
1
4
2
1
2
2
1
1
1
6
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
101-004200-002
102-9140NR-R01
102-A6278F-R01
102-AT2408-R01
102-B15E03-R01
102-HT7130-R01
102-HT7150-R01
102-M2902V-R01
102-M2904V-R01
102-M38039-R02
102-MC3361-R01
103-00MA77-R01
103-0MA360-R01
103-1SS372-R01
103-A2S111-R01
103-DAN222-R01
103-HSC277-R01
103-HVC376-R01
103-HZU5AL-R01
103-IN4148-R01
103-L190YG-R01
103-MHC190-R02
104-A123JE-R01
104-A144EE-R01
104-C144EE-R01
104-MT717T-R01
104-SC1623-R01
PT4200PCB / U phase,PT4200U-060531
Reset IC / PST9140NR,lead-free
Audio power amplifier / KIA6278F,AUDIO,AMP,lead-free
Memory IC / AT24C08N-10SI2.7,lead-free
PLL IC / MB15E03SL,PLL,16-PIN,SSOP,lead-free
Regulator IC / HT7130-1,SOT-89,lead-free
Regulator IC / HT7150-1,lead-free
Operational amplifier / NJM2902V,OP-AMP,lead-free
Operational amplifier/ NJM2904V,OP-AMP,lead-free
MCU / M38039FFHFP,FLASH,lead-free
IF (FM) demodulation IC / MC3361BP,lead-free
Chip HF switch diode / MA77,0805,lead-free
Chip varialble capacitor diode / 0805,MA360(PANASONIC),lead-free
Chip switch diode / 1SS372(TOSHIBA),lead-free
Chip switch diode / 0603,MA2S111(PANASONIC),lead-free
Chip switch diode / DAN222,(ROHM),lead-free
Chip diode / wave phase switch ,HSC277(HITACHI),lead-free
Chip variable capacitor diode / HVC376B,lead-free
Chip regulator diode/ HZU5ALL(HITACHI),lead-free
Chip diode / IN4148,lead-free
Chip LED(light emitting diode)/ 0603,green,CL-190YG-CD,lead-free
Chip LED(light emitting diode)/ 0603,red,HSMH-C190,lead-free
Chip triode / DTA123JE(ROHM),lead-free
Chip triode / DTA144EE(ROHM),lead-free
Chip triode / DTC144EE(ROHM),lead-free
Chip triode / FMMT717TA,lead-free
Chip triode / 2SC1623,lead-free
IC11
IC8
IC9
IC1
IC14
IC12
IC4, IC6, IC7
IC3
IC10
IC5
D1
D12
D13
D15, D16, D25
D308
D3, D4, D6, D7
D8, D9
D14
D17, D18
D20, D29
D28
Q17
Q34
Q22, Q23, Q26, Q27, Q33, Q37
Q8, Q30
Q10

17
PT558 SERVICE MANUAL
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
104-SC3356-R01
104-SC4617-R01
104-SC4738-R01
104-SC4919-R01
104-SC5108-R01
104-TA1298-R01
104-TC4082-R01
105-2SK508-R01
105-3SK318-R01
105-RD01MU-R01
105-RD07MV-R01
105-SK1588-R01
105-SK1824-R01
106-0BA010-R01
106-454548-R01
106-LBE010-R01
106-RD835E-R01
108-455C24-R01
108-CF450H-R01
108-XF4995-R01
109-040000-R01
109-040100-R01
109-040101-R01
109-040102-R01
109-040103-R01
109-040104-R01
109-040105-R01
109-040122-R01
109-040123-R01
109-040124-R01
109-040153-R01
109-040154-R01
109-040182-R01
109-040183-R01
109-040184-R02
109-040203-R01
109-040221-R01
109-040222-R01
109-040223-R01
109-040224-R01
109-040272-R01
109-040273-R01
109-040274-R01
109-040332-R01
109-040333-R01
109-040334-R01
109-040392-R01
109-040393-R01
109-040394-R01
109-040471-R01
109-040472-R01
109-040473-R01
109-040474-R01
109-040562-R01
109-040563-R01
109-040564-R01
109-040682-R01
Chip triode / 2SC3356,lead-free
Chip triode / 2SC4617(S)(ROHM),lead-free
Chip triode / 2SC4738(GR),AF,AMPLIFIER(TOSHIBA),lead-free
Chip triode / 2SC4919,MUTING,CIRCUIT(SANYO),lead-free
Chip triode / 2SC5108Y(TOSHIBA),lead-free
Chip triode / KTA1298(Y),lead-free
Chip triode / KTC4082,(KEC),lead-free
Chip FET (field-effect transistor) / 2SK508NV(K52),lead-free
Chip FET (field-effect transistor) / 3SK318,lead-free
Chip FET (field-effect transistor) / RD01MUS1,lead-free
Chip FET (field-effect transistor) / RD07MVS1,lead-free
Chip FET (field-effect transistor) / 2SK1588(NEC),lead-free
Chip FET (field-effect transistor) / 2SK1824,lead-free
Button switch / SKHLLBA010,imported,lead-free
Touch switch / 4.5*4.5*4.8,lead-free
Chip touch switch / SKRTLBE010,lead-free
Carbon film channel/Encoder switch/ RD835E-GA1-16C-0F01 18mm
BAND ,lead-free
Plug-in phase frequency detector / JTBM455C24,lead-free
Plug-in porcelain filter/ LTM450HT,450kHz 3kHz,lead-free
Plug-in IF filte/ 49.95MHz 7.5KHz,U-5*2,lead-free
Chip resistor / 0402,0R 5%,lead-free
Chip resistor / 0402,10R 5%,lead-free
Chip resistor / 0402,100R 5%,lead-free
Chip resistor / 0402,1K 5%,lead-free
Chip resistor / 0402,10K 5%,lead-free
Chip resistor / 0402,100K 5%,lead-free
Chip resistor / 0402,1M 5%,lead-free
Chip resistor / 0402,1.2K 5%,lead-free
Chip resistor / 0402,12K 5%,lead-free
Chip resistor / 0402,120K 5%,lead-free
Chip resistor / 0402,15K 5%,lead-free
Chip resistor / 0402,150K 5%,lead-free
Chip resistor / 0402,1.8K 5%,lead-free
Chip resistor / 0402,18K 5%,lead-free
Chip resistor / 0402,180K 5%,lead-free
Chip resistor / 0402,20K 5%,lead-free
Chip resistor / 0402,220R 5%,lead-free
Chip resistor / 0402,2.2K 5%,lead-free
Chip resistor / 0402,22K 5%,lead-free
Chip resistor / 0402,220K 5%,lead-free
Chip resistor / 0402,2.7K 5%,lead-free
Chip resistor / 0402,27K 5%,lead-free
Chip resistor / 0402,270K 5%,lead-free
Chip resistor / 0402,3.3K 5%,lead-free
Chip resistor / 0402,33K 5%,lead-free
Chip resistor / 0402,330K 5%,lead-free
Chip resistor / 0402,3.9K 5%,lead-free
Chip resistor / 0402,39K 5%,lead-free
Chip resistor / 0402,390K 5%,lead-free
Chip resistor / 0402,470R 5%,lead-free
Chip resistor / 0402,4.7K 5%,lead-free
Chip resistor / 0402,47K 5%,lead-free
Chip resistor / 0402,470K 5%,lead-free
Chip resistor / 0402,5.6K 5%,lead-free
Chip resistor / 0402,56K 5%,lead-free
Chip resistor / 0402,560K 5%,lead-free
Chip resistor / 0402,6.8K 5%,lead-free
1
2
1
1
3
3
1
1
2
1
1
1
4
1
2
1
1
1
1
2
15
4
4
15
18
5
2
1
1
4
8
1
1
2
1
10
3
1
3
2
1
4
2
2
3
1
2
3
1
1
7
7
3
3
6
1
1
Q3
Q6, Q9
Q7
Q24
Q2, Q4, Q5
Q29, Q31, Q32
Q21
Q14
Q19, Q20
Q12
Q11
Q38
Q13, Q25, Q35, Q36
K1
K2, K4
K3
Sw2
L57
CF1
XF1, XF2
C67, C166, C247, C276, C277, R4, R24, R30,
R99, R154, R174, R217, R255, R260, R261
R98, R127, R200, R238
R12, R94, R128, R237
R29, R41, R42, R48, R49, R50, R111, R129,
R130, R131, R157, R184, R195, R199, R273
R109, R120, R121, R122, R123, R126, R133,
R140, R194, R205, R206, R212, R228, R254,
R264, R266, R268, R295
R105, R113, R114, R115, R116
R160, R162
R188
R208
R6, R7, R8, R9
C187,C188,C189,C265,R64, R76, R142, R192
R201
R224
R218, R219
R67
R27,R207,R225,R226,R227,R240,R263, R265,
R267, R269
R214, R215, R216
R294
R209, R210, R211
R87, R164
R223
R46, R171, R172, R257
R86, R231
R59, R60
R196, R258, R290
R82
R221, R222
R53, R149, R153
R165
R3
R118, R39, R125, R155, R156, R204, R248
R17, R18, R19, R20, R21, R22, R292
R166, R232, R293
R63, R65, R132
R173, R175, R176, R177, R178, R291
R163
R220

18
PT558 SERVICE MANUAL
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
109-040683-R01
109-040821-R01
109-040822-R01
109-040823-R01
109-040913-R01
109-060000-R01
109-060100-R01
109-060101-R01
109-060102-R01
109-060103-R01
109-060104-R01
109-060122-R01
109-060124-R01
109-060150-R01
109-060151-R01
109-060154-R02
109-060181-R01
109-060220-R01
109-060222-R01
109-060224-R01
109-060271-R01
109-060272-R01
109-060274-R01
109-060330-R01
109-060332-R01
109-060393-R01
109-060470-R01
109-060471-R01
109-060472-R01
109-060473-R01
109-060561-R01
109-060562-R01
109-060563-R01
109-060564-R01
109-060683-R01
109-060822-R01
109-060823-R01
109-070000-R01
109-100R47-R01
110-110473-R01
110-110683-R01
110-220103-R08
112-043100-R01
112-043101-R01
112-043102-R01
112-043103-R01
112-043104-R02
112-043105-R01
112-043152-R01
112-043183-R01
112-043222-R01
112-043223-R01
112-043273-R01
112-043332-R01
112-043333-R01
112-043392-R01
112-043393-R01
Chip resistor / 0402,68K 5%,lead-free
Chip resistor / 0402,820R 5%,lead-free
Chip resistor / 0402,8.2K 5%,lead-free
Chip resistor / 0402,82K 5%,lead-free
Chip resistor / 0402,91K 5%,lead-free
Chip resistor / 0603,0R 5%,lead-free
Chip resistor / 0603,10R 5%,lead-free
Chip resistor / 0603,100R 5%,lead-free
Chip resistor / 0603,1K 5%,lead-free
Chip resistor / 0603,10K 5%,lead-free
Chip resistor / 0603,100K 5%,lead-free
Chip resistor / 0603,1.2K 5%,lead-free
Chip resistor / 0603,120K 5%,lead-free
Chip resistor / 0603,15R 5%,lead-free
Chip resistor / 0603,150R 5%,lead-free
Chip resistor / 0603,150K 1%,lead-free
Chip resistor / 0603,180R 5%,lead-free
Chip resistor / 0603,22R 5%,lead-free
Chip resistor / 0603,2.2K 5%,lead-free
Chip resistor / 0603,220K 5%,lead-free
Chip resistor / 0603,270R 5%,lead-free
Chip resistor / 0603,2.7K 5%,lead-free
Chip resistor / 0603,270K 5%,lead-free
Chip resistor / 0603,33R 5%,lead-free
Chip resistor / 0603,3.3K 5%,lead-free
Chip resistor / 0603,39K 5%,lead-free
Chip resistor / 0603,47R 5%,lead-free
Chip resistor / 0603,470R 5%,lead-free
Chip resistor / 0603,4.7K 5%,lead-free
Chip resistor / 0603,47K 5%,lead-free
Chip resistor / 0603,560R 5%,lead-free
Chip resistor / 0603,5.6K 5%,lead-free
Chip resistor / 0603,56K 5%,lead-free
Chip resistor / 0603,560K 5%,lead-free
Chip resistor / 0603,68K 5%,lead-free
Chip resistor / 0603,8.2K 5%,lead-free
Chip resistor / 0603,82K 5%,lead-free
Chip resistor / 0805,0R 5%,lead-free
Chip resistor / 1206,0.47R 5%,lead-free
Chip trimming resistor/ MVR22HXBRN473,47K 25%,B
Linear,lead-free
Chip trimming resistor/ MVR22HXBRN683,68K 25%,B
Linear,lead-free
Volume switch/ RD810S-JA1-A103-0C61,lead-free
Chip capacitor / 0402,10P 0.5P,50V,C0G,lead-free
Chip capacitor / 0402,100P 5%,50V,C0G,lead-free
Chip capacitor / 0402,1000P 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.01uF 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.1uF 10%,16V,X7R,lead-free
Chip capacitor / 0402,1uF 10%,50V,X7R,lead-free
Chip capacitor / 0402,1500P 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.018uF 10%,25V,X7R,lead-free
Chip capacitor / 0402,2200P 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.022uF 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.027uF 10%,50V,X7R,lead-free
Chip capacitor / 0402,3300P 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.033uF 10%,16V,X7R,lead-free
Chip capacitor / 0402,3900P 10%,50V,X7R,lead-free
Chip capacitor / 0402,0.039uF 10%,50V,X7R,lead-free
R78, R245
R33
R229, R230
R52
R77, R213
L16, C1, C86, C266, C273, L22, L34, L42, R23, R28, R81,
R141, R182, R241, R262
R95, R96, R97, R101
R88, R89, R90, R180
R37, R38, R47, R234, R256, R54
R75,R92,R117,R119,R124,R136,R137,R138,R139, R203
R80, R102, R158, R197, R235, R243, R247, R249
R69
R5, R66
R31
R179
R143, R144, R145, R146, R147, R170
R70, R71, R189
L54, R73, R93
R2, R185, R186, R187
R233
R34, R35
R40
R85
R72
R55, R56, R57, R58
R68, R193
R15, R32
R25
R151, R152, R159, R183
R10, R11, R13, R14
R202, R244
R44, R61, R62, R191
R16, R239
R148
R190
R36
R51
L63
R167, R168, R169
VR2
VR1
SW1
C257
C171, C196
C75,C105,C106,C110, C111, C263, C278, C310
C50,C149,C155,C159,C160,C161,C162,C279
C85,C101,C167,C168,C173,C176,C177,C178,C271,C286,
C307
C170, C235, C252, C303
C289
C156
C215
C242, C243, C245
C179, C185
C113
C224, C244
C82, C222, C238, C284
C223
2
1
2
1
2
15
4
4
6
10
8
1
2
1
1
6
3
3
4
1
2
1
1
1
4
2
2
1
4
4
2
4
2
1
1
1
1
1
3
1
1
1
1
2
8
8
11
4
1
1
1
3
2
1
2
4
1