Soontone ST-518 Schematics

J1000

10
11
12
13
14
15

RF-CONTROL INTERFACE

J1003

ONEJACK STEREO SW

MK1000

ICROPHONE

16

R1003
10K

J1004

1
2
3

R1032

PTT&MONI

100R

C1013
471P

5

E

4

D

3

C

2

B

1

A

1

1

2

2

C1012

471P

BATT1 +5

U1000
5V-VOLTREG

2

Vin

C1000
103P E1003

100uF/10V
E1000

3

Vout

VSS

10uF/6.3V

1

VOLTAGE REGURATER

5T

1
2
3
4
5
6
7
8
9

BATT

C1035
102P

BATT

D1002
1N4007

L1004

271T

C1016
471P

+5

R1046

1K2

R1029
NOUSE

L1001
271T

+5

SUB MODULATION

AUDIO MODULATION
SAVE
SQUELCH-VOLTAGE
POWERCONTROL APC
AF SIGNAL

PLL STB ENABLE

PLL DATA LINE
RX/TX ENABLE
PLL CLOCK LINE

PLL LD LINE

R1019
1K

C1053

104P(J)

R1051
100K

E1008

4.7uF/6.3V

C1059

273P(J)

Q1007

2SC4181

R1023

560R

TP1000
POINT

+5+5

R1047
47K

C1009
103P

C1036
102P

C1060

223P(J)
R1054
18K

C1045
NOUSE

R1055
750K

D1003

1N4148

C1003
103P

2

3

C1017
104P

5T

R1012

2K2

R1013

2K2

8

4

VCC
VSS

U1006A

LM4558

1SS372

D1004

1

3

2

2

3

E1011

2.2uF/6.3V

1

C1018
104P

MOD/SUB

MOD/AUD

C1023
104P

1

1

U1001
HT7033

Vout

PB6
PB1
PD0
AF

PB7

PA5
PC2
PA6

PC4

PB3

PB2

R1049
22K

R1056
27K

C1061

153P(J)

R1000

10K

3

6
1
2
3

B

E1006
1uF/10V

C1058
473P(J)

C1001
103P

E

E

C

Q1002
2SA1362

C

R1034

470K

E1007
NOUSE

R1033
820R

SERIAL CLOCK

COMMAND DATA

R1060

4K7

BATT1

R1015
120K-1%

R1017

1K

R1016
150K-1%

C1028

474P

BATT

C1007
103P

XTAL

XTAL/CLOCK

REPLY DATA

A/D CAP

C1037
102P

PB0

C1002
103P

R1021
560R

R1022
560R

PC0

PB4

3107/2107ЎЎIЈЇOЅУїЪ·ЦЕдЈє
PA0ЈєBINKEY-1
PA1ЈєBINKEY-2
PA2ЈєBINKEY-3
PA3ЈєBINKEY-4
PA4ЈєCMX808Ј-CS
PA5ЈєCMX808Ј-DATA
PLLЈ-DATA
24C02Ј-SDA
PA6ЈєCMX808Ј-CLOCK
PLLЈ-CLOCK
PA7ЈєCMX808Ј-REPLAY

PB0ЈєBATTLOWЈ-DET
PB1ЈєTA31136Ј-SQ
PB2ЈєMONIЈ-KEY
PB3ЈєPTTЈ-KEY
RS232Ј-RX
PB4ЈєLEDЈ-REDЈЁTXЈ©
PB5Јє386Ј-POWER
PB6ЈєSAVEЈ-POWER
PB7ЈєPLLЈ-CS

PC0ЈєLEDЈ-GREEN

ЈЁRXЈ©

1

3

G

R1035
10R

C1022
104P

CCE

Q1001
DTC144EE

Q1003
2SK1588

D2S

C1008

103P

D1001

D1000

GREEN

RED

B

B

BATT

R1036
33K

R1045
56K

E

E1001

100uF/10V

C1046
221P

C1047
221P

1
2
3
4
5

LS1000

SP-36(4R)

R1018

1K

J1002

A
B
C
D
E

PHONEJACK STEREO SW

L1002
271T

PC1

PC1ЈєRS232Ј-TX
PC2ЈєRX/TXЈ-POWER

+5

R1007

1

2

3

4

5

6

CS

7

IRQ

8

NC

9

10

VSS

C1034

102P

C1025
104P

10K

OSC

PA6

PA5

PA7

PA4

PD1

AF

MOD/AUD

MOD/SUB

PC3Јє24C08Ј-SCL
PC4ЈєBEEP
PLLЈ-LD

PD0ЈєPOWERAPC
PD1ЈєCMX808Ј-IRQ

RP1000
47K

C1032

R1050

100K

Q1004

L1000

271T

19
10

9
8
7
2

1
28
27
17
18

R1027

NOUSE

102P

R1052

1M

R1058
4K7

C1052

104P(J)

R1038
33K

C1062

101P

Y1000

4.000M

C1033

VDD

20

OSC121OSC2
REST

VDD

PB0/AN0
PB1/AN1
PB2/AN2

PA3/PFD

PB3/AN3

PA4/TMR

PB4/AN4

PA5/INT

PB5/AN5

PA6/SDA

PB6/AN6

PA7/SCL
PB7/AN7
PD0/PWM0
PD1/PWM1

VSS

11

L1005

100NH

+5

R1025

R0

RP1001
1
2
3
4

1KX4

102P

NOUSE

C1014
471P

C1055

473P(J)

R1039

33K

7

R1059
4K7

C1057
473P(J)

R1042

33K

8
7
6
5

PA0
PA1
PA2

PC0
PC1
PC2
PC3
PC4

BATT

C1040

C1063
681P

C1019
104P

U1002

22
6
5
4
3
26
25
24
23
12
13
14
15
16

HT46R23(28)

C1004
103P

R1031

100R

C1050

332P
R1005
10K

5T

R1061
1M8

R1043
33K

C1051

332P

E1005

100uF/6.3V

Q1005
2SC1623

C1015
471P

R1030
NOUSE

R1028

NOUSE

Q1006
2SC1623

R1008
10K

BATT1

R1053
1M

R1040
33K

R1062
3K3

C1041
NOUSE

C1027
22P

C1005
103P

J1001

10
9
8
7
6
5
4
3
2
1

CON10

PC3

PA5

OSC

EEPROM

PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC0
PC1
PC2
PC3
PC4

PB5

B

C1006
103P

C1038

R1014

NOUSE

2K2

+5

C1054

104P(J)

R1063

150K

C1056
473P(J)

1

W

3

E1002
100uF/10V

VR1001

1

3

47K

R1006

10K

L1003

271T

C1043

NOUSE

R1020

1K

R1064
220K

2

R1010

10K

R1026

R0

C1042
NOUSE

R1041

33K

C1011
103P

3

VR1000
3
47K

2

W

1

1

R1009
10K

+5

R1001

10K

8

SDA5SCL

7

MODE

GND

AT24C08RM(8)

4

C

C

Q1000

B

DTC144EE

E

E

6

3

IN+

V OUT

2

VS

IN-

GAIN

7

BYPASS

GAIN

GND

U1004 LM386N4(8)

4

E1004
10uF/6.3V

20

19

E1010

18

17

2.2uF/6.3V

C1044

16

15

NOUSE

14

13
C1048
221P

12

11

C1024
104P

R1044

33K

U1003

CE0

VCC

CE1
CE2

R1011
2K2

R1002

10K

B

C1020
104P

C1029
474P

5
1
8

C1021
104P

U1005
CMX808AE3

VDD

VOLUME OUT

TX SUB AUDIO OUT

VOLUME IN

TX AUDIO OUT

TX AUDIO IN

RX AUDIO OUT

RX AMP OUT

RX AMP IN

VBIAS

C1064

105P

+5

2

Vin

VSS

REST
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PD0
PD1

PA0
PA1
PA2
PA3

PC4

R1024

R0

C1039
NOUSE

R1057

1K5

C1026
22P

MICRO

PROCESSOR

876

123

C1031

C1030

102P

102P

C1010

103P

+5

R1048
47K

2SC1623

R1004
10K

6

5

E1009

4.7uF/6.3V

5

4

C1049

332P

R1037

33K

U1006B
LM4558

R2000

233

22K

39K

C2041
103P

TX DRIVE

PHASE LOCKED
LOOP SYSTEM

1

2

TX FINAL

R2001
47K

TX DRIVE

C2007
102P

X2000

VSS

VSS

19.200MHz

P2000
RCA

R2006
47R

C2000
102P

R2054
10R

C2031
6P(C)

R2031
100R C2012

C2093

104P

R2066
22K

C2109
27P

L2019
18N

XOUT

R2077
560R

Q2016

R24

VCC
ADJ

TC

L2000
1uH

1

L2002
4N7

2SC3357(RF)

R2055
680R

103P

C2047

102P

6
5

4
3

C2019
102P

POINT

R2026

1stIF 21.7MHz

D

S

R2041
330R

C2121

221P

C2122

221P

R2005
47K

3

4

IF SYSTEM

R2072
33K

9

AF OUT

FIL IN

8

R2070
180K

R2085
4K7

1
2
3
4

100R

C2104

15P
L2022
330N

C2039

C2037
103P

103P

L2023
560N

C2038

R2027

103P

100R

R2043
1K

T2000
450K

C2110

27P

11

10

QUAD

IF OUT

7

C2087

104P

CF2000

CFW450F

APC

5T/R

MOD/AUD

SAVE

PLD
PCK
PDA
PEN

XOSC

MOD/SUB

12

RSSI

R2045
470R

Q2015
DTA114EE

C2088

104P

13

N-DET

VCC4IF IN5DEC6FIL OUT

C2089
104P

C2054
103P

SQAF

XOSC

MOD/SUB

MOD/AUD
SAVE
SQ
APC
AF

PEN

PDA
5T/R
PCK

PLD

C2040
103P

14

N-REC

MIX OUT

3

C2107
2P(B)

XF2000

38.85MHz

R2046
2K2

XF2001

38.85MHz

C2105
15P

R2014
100K

C2116
101P

C2123

224P

15

16

GND

MIX IN

OSC IN

OSC OUT

TA31136FN

C2070

1

2

NOUSE

Y2000
NOUSE

C2072
NOUSE

2nd Local

21.25MHz2nd IF 450KHz

SUB MODULATION

AUDIO MODULATION
SAVE
SQUELCH-VOLTAGE
POWERCONTROL APC
AF SIGNAL

PLL STB ENABLE

PLL DATA LINE
RX/TX ENABLE
PLL CLOCK LINE

PLL LD LINE

R2052
220K

U2001

C2108
2P(B)

Q2006

2SC4215

IF AMP

R2074
1K2

+5

L2029
271T

R2042
330R

C2124

47P

C2126
68P

BATT

5T

RF-CONTROL INTERFACE

5R

R2030
100R

C2046
103P

L2026
220N

C2101

5P(C)
L2025
220N

J2000

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

2SC4215

R

Q2007

R

ANTENNA SW

DO RF
DO IF
FO/LD

C2060

4T

471P

C2025

C2056

4P(C)

R2061

R2062

R33

R33

F2000
SHORT

BT2000

7.34V

R2032
100R

L2020
18N

Q2017
R24

R2081
22R

U2002

CLK

VP2VP

FIN RF

VCC1VCC

FIN RF

FIN IF
FIN IF

OSC IN

DATA

LE

GND4GND17GND14GND7GND

LMX2332ATM(20)

D2010

1N4148

R2018
150K-1%

R2019
150K-1%

11
5
6
16
15
8
12
13

C2068
NOUSE

D2000
1SS314

C2077

8P(C)

C2066

C2057

10P

4P(C)

R2021
150K-1%

C2069
NOUSE

2
C2061
471P

3

R2020
150K-1%

R2022
150K-1%

C2010
102P

5C

C2050
103P

D2009
1N4148

C2013
102P

R2083
15K

C2033

6P(C)

R2012

5C

3K3

L2027
271T

E2003
10uF/6.3V

C2065

C2073

471P

NOUSE

1P(B)
C2028
6P(C)

C2034

103P

C2009

102P

D2006

C2114
105P

C2032

6P(C)

C2049
103P

C2055
103P

19

20

9

L2003

L20044TL2005

4T

C2022

1P(B)
C2020
3P(C)

Q2000
D

G

S

NE5510

C2112

R2028

18P

100R

L2024

3TS

Q2008

R2056
6K8

5T

R2080
22R

R2057

6K8
C2048
103P

C2064

471P

R2048

2K2

R2082
180R

R2073
33K

C2024

1P(B)
C2027
6P(C)

2

1P(B)

3

C2023

L2006
8TS

102P
C2001

L2007
30T

L2008

30T

C2113

C2042

105P

103P

C2008
102P

BATT

C2043
103P

104P

VR2000
47K

D2003

HSC277

R2075
1K2

NOUSE

D2004
HSC277

R2011
3K3

3
18
10

R2044
1K

C2119
20P

R2058
NOUSE

R2010
3K3

C2090

5C

L2009
5T

L2010
100N

R2084
4K7

BATT

84

Q2009
2SC1623

E2001

4.7uF/6.3V

C2074
NOUSE

R2023
150K-1%

C2044

103P

U2000A
LM2904V

Q2010
DTC114EE

C2014
102P

C2079
7P(C)

D2001

HSC277

R2007
150R

C2002
102P

C2115

101P

R2038
10K

1

R2059
NOUSE

5T

C2011
102P

C2015

102P

C2051
103P

L2021
18N

C2106

15P

C2102
5P(C)

C2103
5P(C)

C2076

C2075

NOUSE

NOUSE

R2033
100R

D2002

HSC277

5T

C2021

L2012
5TS

3P(C)

L2013
4TS

C2067

C2058

10P

4P(C)

Q2001
2SB624

C2035
103P

C2062
471P

R2003
47K

R2060
NOUSE

VCC

C2052
103P

R2088
82K

C2097

0P5(B)
Q2018
R24

R2049
2K2

R2078
560R

C2082
104P

6

5

R2053
220K

R2063
22K

C2053
103P

L2028
271T

R2034
100R

E2004

0.1uF/6.3V

+5

R2002
47K

R2008
3K3

C2084
104P

R2067
1M

U2000B

LM2904V

R2004
47K

C2045
103P

R2035
100R

L2011
100N

C2081
7P(C)

C2078
8P(C)

R2079
560R

RF AMP

Q2004

3

5C

Q2011
DTA144EE

R2068
68K

R2087
4K7

1
2

C2003

Q2003
DTA114YE

R2064
22K

C2026
1P(B)

3SK240

102P

C2085
104P

D2011
1SV270(TF)

L2031
27N

G1
G2

C2071
NOUSE

CV2000
NOUSE

E2006

1uF/6.3V

R2013
100K

Q2012
DTC144EE

D

4

S

C2004
102P

R2024

100R
R2017
150K-1%

5R

C2036

C2005

103P

102P

R2047
2K2

Q2013
DTC144EE

R2015
100K

R2065
22K

D2005
HSC277

C2059
4P(C)

R2089
8K2

C2111
27P

D2012

1SV270(TF)
R2039
10K

L2017
18N

C2083
104P

7

C2098
0P5(B)

Q2019
K52

R2086
4K7

C2080
7P(C)

C2006
102P

E2005

0.1uF/6.3V

C2117
101P

L2001
1uH

D2013
1SV270(TF)

R2016
100K

Q2014
DTC144EE

C2095
0P5(B)

L2014
4TS

R2025
100R

E2000

4.7uF/6.3V

C2016
102P

C2096
0P5(B)

L2015

L2016

C2029

4TS

4TS

6P(C)

C2099
5P(C)

R2037
10K

D2007
LED

D2008
LED

C2086

104P

R2050
2K2

C2128

C2018

473P

102P

C2017
102P

L2030
271T

TP2002

R2040
10K

POINT

MIXER

Q2005

1

G1

2

G2

3SK240

C2030
6P(C)

C2100
5P(C)

L2018
18N

R2029
100R

E2002
10uF/6.3V

C2120
181P

TP2001
POINT

R2009
3K3

C2063
471P

C2118
20P

R2069
180K

R2071
3K9

C2091
104P

R2036
100R

+55C

Q2002
2SB624

C

EEC

B

B

C2092
104P

R2090
120K

RP2000
8
7
6
5

1KX4

C2094
104P

Specifications



General:

Frequency Range;


Number of Channels
Channel Spacing
Power Volta ge

750mAh NiMH battery
Wor king Tem perature
Size (W×H×D)


Weight (Net)

QX-518VHF QX-518UHF

M Type150-174MHz M Type450-470MHz Sensitivity (12dB SINAD) 0.12µV 0.125µV
M2 Type136-150MHz M4 Type400-440MHz

16 channels

25 KHz (PLL spacing: 5kHz/6.25kHz) (±25kHz ; EIA)

6.25 V DC ( ± 20%)


 Noise Respond

3W output, more than 10H 3W output, more than 10H

20~60

52×110×25mm (including battery)

190g (including battery and antenna)



Receiver:

Modulation Acceptance
Selectivity

Intermodulation Distortion

(±25 k/±50 k/±1 M±2 M)

Audio Power Output
Frequency Stability
Channel Frequency Spread

Transmitter:

RF Power Output (H/L) 3W / 1W 3W / 1W
Modulation
Spurious and Harmonics
FM noise (300-3000Hz) Less than  45 dB
Modulation Distortion (300-3000Hz) Less than 5%
Frequency Stability
Channel Frequency Spread
Max. Freq. Deviation

Sorry for no further advise for changing the specification.

QX-518VHF QX-518UHF

±7 kHz

More than 65dB

More than 65dB More than 60dB



More than 60dB

400mW when distortion less than 10%

±2.5 ppm

24MHz 40MHz

16kФF3E

Less than  70 dB

±2.5 ppm

24 MHz 40MHz

±5 kHz (1000kHz100%)