TECHNICS SA-EH760 Service Manual

SCHEMATIC DIAGRAM- 1

OPERATION CIRCUIT

A

FL901 (RSL0298- F)

150

R997

C922

35V33

1 6 8 10 11 1213 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 3031 32 33 34 35 36 37 38 39 404142 43 44 45 46 47 48 49 50 53 542 5 7 9

C920

Y A A RQPONMLKJIHGFDCBBCDEFGHIJLLMNOPQRSTUVWX

50V4.7

C928

50V4.7

V

E

D973

C921

MA4030MTA

1000P

R996

150

NOTE:
The number which noted atthe connectors on the schematicdiagram as
"SCHEMATICDIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serialnumber located on the leftcorner in the schematic diagram.

FL DISPLAY

C908

470P

R925

1K

R922

10K

S901

R901

)
/

(

820

S902

)

MODE

(

1K

)

S903

DEMO

-

CLOCK/TIMER,

(

1.2K

S904

)

PLAY/ REC
(

1.5K

S905

)

FM AUTO/MONO

(

1.8K

S906

)

TUNING MODE

(

2.2K

S907

)
SET

(

R906

R905

R904

R903

R902

R907

3.3K

S908

R908

)

INPUT SELECTOR

(

4.7K

S909

INPUT)

(6CH DISCRETE

: SOURCE SIGNAL LINE

C927

C919

50V4.7

50V4.7

JK903
HEADPHONES

W905

R924

C907

R950

C924

C395

C396

470P

100

0.1

0.047

0.047

1K

10K

R921

4.7K

R949

0.01

C904

R51147R509

R51247R510

C509

C510

47

0.01

47

0.01

)
PS

(

S914

(RDS DISP MODE)

Q912

Q911

U

T

2.2K

R944

S

D974

MA165TA

8
7
3
2
4
5
1

0.1

C923

R913

820

S915

S

T
M

)
PTY

(

R914

1K

0V

R964

120

-

6.1V

R963

120

-

6.1V

0V

Q911,912
2SD2144STA

MUTING

R915

1.2K

R916

1.5K

-

6.2V 0.1V

Q961
UN4115TA

MUTING CONT.

R968

1M

K
0
1

R909

1.8K

S910

)

(TUNING,

D961

C961

MA4075MTA

16V10

R910

2.2K

)

S911

TUNING,

(

150K

R975

R911

3.3K

S912

C931

(TUNER/BAND)

16V10

R912

4.7K

S913

(DIGITAL

R967

2.2K

)

S.WOOFER

R966

3.9K

R965

3.9K

SCHEMATIC DIAGRAM- 2

-

27.6V

: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE

A
B
C

A VBCDEFGHIJK LMNOPQR UTS

-17.3V

-17.3V

-17.3V

-17.3V

-17.3V

-17.3V

-17.3V

-17.3V

-17.3V

-17.6V

-26.8V

-26.8V

5.2V

-22V

-17.3V

-12.5V

-17.3V

P10

-27.6V
51

-VP

-26.9V

A
B
C
D
E
F
G
H

I
J
K
L
M
N
O
P
Q
R
S
T

U
V

W

X
Y

D934 MA165TA

D933 MA165TA

R990 100K

100K

R993

-21.8V

-21.7V

-11.8V

-16.8V

-17.1V

-21.7V

-21.7V

-12V

-12.6V

-7.6V

-16.8V

-9.6V

-6.8V

-18V

-18V

-18V

-11.4V

-11.4V

-12.2V

5.2V

-18V

-12.4V

-9.6V

-4.8V

-11.7V

1.5V

52

P11

53

P12

54

P13

55

P14

56

P15

57

P16

58

P17

59

P18

60

P19

61

P20

62

P21

63

P22

64

P23

65

P24

66

P25

67

P26

68

P27

69

P28

70

P29

71

P30

72

DD4

V

73

P31

74

P32

75

P33

76

P34

77

P35

78

REGIN0

0V

79

REGIN1

0V

80

STANDBY

TIMER

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
0V

P9P8P7

T 3.1ms.

S.W LED

LOUNGE

0V

CAB

-12.7V

P6P5P4P3P2

DD3

V

IC901
LC8A524A5N28

SYSTEM CONTROL/
FL DRIVE

4V
0V

-25V

T 16ms.

2V/2ms.DIV.

T

10ms.

CHORUS

MUTE

POWER

/ECO

0V

5.1V

5.1V

0V

MUTE2

0V

C905

1SS291TA

F=6MHz

F=32.7kHz

5V

0V

0V

5V

SS2VDD2

V

5.2V

1000P

D915

P1

NC

F=32.7kHz

5V

NCNCRL4

C901

6.3V100

R937

NC

3.4V
P-P

2V/2ms.DIV.

10K

1G2G3G4G5G6G7G

4V
0V

-25V

T 3.1ms.

4.4V
P-P

F=6MHz

KEY KARAOKE

5.2V
P-P

1.8V
P-P

5V

0V

SH CS

SH DO

SH DI

SH CK

E DET

5.2V

3.8V

3.8V

R935 100

4.4V

R934 100

5.2V

R988 1K

1.2V

3132333435363738394041424344454647484950

REMOCON

RDS DATA

RDS CLK

HP SW

MIC DET
VR JOGA
VR JOGB
NC(GND)

SH REQ

KEY TU

DD1

V

XC OUT

XC IN

VSS

X OUT

XIN

RESET

AC IN

SEL/ TUNER

SEL TUNER

ST/ AV6CH

RL2
RL1

LC72 CK

LC72 DO/ST

LC72 CE

LC72 DI
CHECK

CR TIMER

SD

100

5.2V

D903

R987 1K

C913

NC

R926

MA165TA

16V10

2.2K

30

5.2V

29

2.6V

28

2.5V

27

0.5V

26

5.2V

25

5.2V

24

5.2V

23
22

1.3V

21

5.2V

20

5.2V

19

5.2V

18

2.5V

17

2.2V

16
15

2.7V

14

1.7V

13

5.1V

12

2V

11

0V

10

5.2V

9
8

5.1V

7

5.1V

6

5.2V

5

5.1V

4

0V

3

0V

2

2.6V

1

TP

820K

R955

R918 10K

R928 47K

R953 100

D905 1SS291TA

R954
100K

0.1

C912

L902 1 H

Q901
UN4212TA

RESET

5.1V

A
B
C
D

E
F

10M

R952

5.2V

22K

R956

1K

R938 1K

R941 1K
R942 1K
R929 1K
R930 1K
R932 1K
R931 1K

1

3

R951
330K

22K

X901

(6MHz)

X902

(32.7kHz)

0V

C925

C915

1000P

0.01

C910

20P

C911

18P

C914

D904

2

50V2.2

MA165TA

R957

1K

R976

100K

J

H

R

F
G
A
B
D
C

R919

15K

100

R936

R969 2.7K

R960 1.5K

R958 1K

R959 47

R933 470

5.2V

C916

6.3V100

D306

SELS5223C

R939

1.5K

A

R986

1.5K

B

R995

220

C

( )

D954

SELS5923C

(

PLAY/ REC

D951

LNJ301MPUJAD

(DIGITAL

S.WOOFER

D906

MA165TA

)

)

U

LEQ

OP

KIN

R991

47K

C903

0.01

C926

1000P

D902

1SS291TA

6.2V

D901

1SS291TA

L901

10 H

C902

10V1000

SCHEMATIC DIAGRAM- 3

OPERATION CIRCUIT

A

C151

16V10

1K

R158

5.2V

L151

100 H

C152
330P

C158

C154

6.3V47

560P

2.5V
1

VREF STDBY

2.5V
2

MPX IN

5.1V
3

VDD

4

VSS

2.5V
5

FL OUT

2.5V
6

CIN

7

T1

8

T2

9

PCL

10 11

X OUT

X151

IDR

RDCL

RDDA

RDS- ID

V

VSS

XIN

: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE

2.4V

3V

5.1V

2.5V2.6V

IC151
LC72721NMTLM

RDS SIGNAL
DEMODULATOR

100K

100K

R154

R153

C153

C155

1000P

1000P

C160

1000P

R151

1K

R152

1K

C159

6.3V47

20

19

T3

18

17

16

15

14

T4

13

DD

12

: SOURCE SIGNAL LINE

D
C

B

L152

100

H

D151

ABC

R155

120

H
1

MA4051MTA

L153

D956

SELS5923C

(TRI-AMPLIFIER)

D907

MA165TA

A
B
C
D
E

F
G
H

I

J
K

L

220

R984

W902B

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

47P

C157

VR901

EVQVBXFK124B

(VOLUME)

COM

BA

1 2 3

EFA

100

100

R945

R943

C909

1000P

22K

22K

R962

R961

0.01

C917

47P

C156

R946

1K

C918

6.3V100

5.1V

Z901
RCDGP1U28XD

(REMOTE SENSOR)

1

2

3

R923

22K

7.2V

- 27.6V
W901B

M
N
O
P
Q

R
S

T

Q902
UN411FTA

MUTING CONT.

U

0V0V

10K

4.7K

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

SCHEMATIC DIAGRAM- 4

MAIN CIRCUIT

B

W501

1

TU L/C ch

A.GND

MID Lch IN

DC 10V

TW Lch IN

TW Rch IN

S.W

MIC

- 7.5V

V.GND

D.GND

CS/REQ

CLK

DATA

CT.GND

SH FL1
SH FL2

SYNC

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

W902A
15
14
13
12
11
10

9
8

R626 1K

7

R629 1K

6
5
4
3
2
1

To
MAIN CIRCUIT
of SOUND
PROCESSOR

TUNER Rch

MID Rch IN

B
A

A
B

R597 2.2K
R598 2.2K

A

10.4V
B
C
D

-7.5V

A
B
C

E

F

G

2.2K

R712

C
D
E

F

G
H

I

J
B
A
C

:

POSITIVE VOLTAGELINE

:

NEGATIVEVOLTAGE LINE

2.7K

R563

R211

270

D201

R564

MA4056MTA

2.7K

:

FM SIGNAL LINE

:

AM SIGNAL LINE

C659

16V10

C660

16V10

C201

:

SURROUND SP.DRIVESIGNALLINE

:

CENTER SP.DRIVESIGNALLINE

7.5V

-7.5V

R631

3.9K
A

B

R632

3.9K

4.7K

4.7K

R614

R615

100K

C601

R617

53

Z0

X0X1

16V10

4.7K

R204

642

INH VSS G

11

0V0V0V0V5.5V

100K

0V 0V 0V 0V -7.5V

1

Y1 Y0

V

DD

15

0.1

B
A

R203

Z1

14 13 12

100K

R202

:

SOURCE SIGNAL LINE

C202

0.1

7

8

CBA

10

916

IC201
BU4053BCFE2

SIGNAL SELECTOR

R603

3.3K

R688 1.5K

R687 1.5K

ToTUNER UINT
on SCHEMATIC
DIAGRAM- 9

T.GND

+B(1)

+B(2)

DET

Rch IN

Lch IN

CDB

14.8V

1K

Q606

C602

16V10

0V0V

R606 4.7K

W901A
15
14
13
12
11

6.2V

10

9
8
7
6
5
4
3
2
1

CP101

1
2

3

SD

4

5

R230 1K

6
7

CE

DI

DO

CL

R229 1K

8

9
10
11

7.2V

K

L
M
N
O

G

B

F
A
E
D
C

Q707
2SB1548PQAU

REGULATOR

C708

0.047

-28.1V

C706

35V10

14.8V

Q723
2SC3940AQSTA

REGULATOR

C735

0.047

7.8V

C740

16V10

R707

0.047

R764

330

D721

R763

R708

MA4300MTA

4.7K

4.7K

1/4W4.7

D737

MA4082LTA

C737

50V100

D705

RL1N4003N02

C715

25V4700

PRQ

D718

D717

Q605,606
2SD2144STA

MUTING

C731

1000P

C741

0.1

D720

D717- 720
RL1N4003N02

-34.2V-27.6V

C707

14.8V7.2V

C733

0.047

R605 4.7K

R6831KR684

0V 0V

Q605

14.2V

D719

C714

1000P

SCHEMATIC DIAGRAM- 5

IC601

MA700ATA

RSN311W64A

POWER AMP

D756

D757

MA700ATA

: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE

: SURROUND SP.DRIVE SIGNAL LINE
: CENTER SP.DRIVE SIGNAL LINE

7.5V

-7.5V

: SOURCE SIGNAL LINE

123456789101112131415181920212223242526 1617

0V-61.9V 0V0V0V 0V 29.9V-30.4V0V-30.7V-61.6V0V 0V 0V 0V 0V 0V61.4V 30.2V -0.2V 0V 0V 61.5V

0V

Q608

O
M
A

G

C648

1000P

B

A

R602

3.3K

R601 3.3K

0V

0V

Q607

0V

0.01

C705

C603 470P

4.7K

R618

R685

1K

R686

1K

Q607, 608
2SD2144STA

MUTING

6.2V

10.4V

2.1V

10K

10K

Q708 Q706

C604 470P

R604

3.3K

Q706, 708
UN4211TA

SWITCHING

0V

0V

N

470K

R627

R647

1/4W390

R691

1/2W150

R702

C704

C702

C616

50V0.47

R620
120K

R619 120K

R622 120K

R621 150K

R624 150K

R623 120K

L
K

27K

D702,704,752
1N5402BM21

D704

D752

35V4700

35V4700

6.2V

R628 22K

C622 50V100

5.3V

0V

C761

0.1

D558

MA165TA

0V

R572

R703

R704

R705

15K

1W2.2K

1W2.2K

1W2.2K

Q601 Q602

R544

10K

-61.9V

D702

C607 470P

C608 470P

C649 1000P

C650 1000P

C605 1000P

C606 1000P

R612 56K
C610 56P
R611 56K
C609 56P

R610 150K
C612 15P
R609 150K
C611 15P
R608 56K
C614 47P
R607 56K
C613 47P

R648

MA165TA

10K

Q601,602
2SC5398RSTA

SWITCHING

D659

0V

D755 D754

0.01

C618

1/4W120

0.01

C617

R571

10.2V

10K

10K

5.6K

5V

10K

Q558
UN4211TA

SWITCHING

D754,755
RL1N4003N02

D602

5.3V

0V

0V

Q503
2SD2144STA

SWITCHING

D753,761
RL1N4003N02

D753D761

C703

C701

SB360L6508

D607

1SS291TA

15K

R637

D703

D751

35V4700

D701,703,751
1N5402BM21

35V4700

D601

SB360L6508

0.01

C619

68K

R638

0.1

C709

D701

-61.9V

61.5V

B

F

A
E
G
D
C

-30.7V

30.2V

D658

D657

MA165TA

MA165TA

10.4V

14.2V

14.8V

SCHEMATIC DIAGRAM-6

MAIN CIRCUIT

B

R570

2.2M

C552

R559

0.01

4.7K

-7.5V

0.3V

Q551

10K

R557

2SA1995RSTA

SIGNAL LEVELDET.

100K

R556

C551

D551

50V2.2

MA165TA

R546 5.6K

R551 18K

R552 47K

R553 5.6K

R554 5.6K

R555 22K

C553 50V0.47

A

5.6K

R635

2.2K

C724

R547

0.047

R719

C639

1000P

C640

1000P

C641

1000P

C642

1000P

C732

0.022

C647

1000P

3.3K

Q703
2SD2137PQTA

REGULATOR

R797

0

8.1V

C721

10V100

E601

E602

29.9V7.5V

14.8V

-7.5V

10.4V

C723

0.047

B

C

D

E

F

R729

220

14.2V

D738

D730

D725

MA165TA

Q555
2SD2144STA

SIGNAL LEVELDET.

-7.5V

R591

4.7K

2.2K

R558

3.9K

R727

D749

MA165TA

MA4082LTA

100

R768

D760

MA165TA

R770
100K

MA4091HTA

D758

C734 50V3.3

MA165TA

7.5V

-7.5V

D552

MA165TA

10.2V

R561

MA4100MTA

C554

10V220

A
B

C

D

G
E

R767

1/4W4.7

F

CN781

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

W701B

R749

1K

14.2V10.4V

13.5V

D739

MA165TA

13.5V

9.6V

R765

1/2W220

: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE

R548

1K

0.01

C550

100K

D555

Q554
2SA1995RSTA

SIGNAL LEVELDET.

D563

MA165TA

R722

Q711
2SB1548PQAU

REGULATOR

Q725
2SC5398RSTA

REGULATOR

7V

Q709
2SD2144STA

RELAYDRIVE

R738

3.9K

C564

16V10

1/6W2.2

0V

7.5V

47K

R739

-30.7V

R721

1/4W4.7

0.7V

: SURROUND SP.DRIVE SIGNAL LINE
: CENTER SP.DRIVE SIGNAL LINE

L605

B

R649

1/2W10

R650

1/2W10

L606

A

Q617, 618
2SD2144STA

RELAYDRIVE‘

R644

1/2W10

L604

E

R645

1/4W10

C625

0.047
R643

1/2W10

L603

F

R776 10K

D736

MA165TA

0V

D715

MA165TA

R766

1/2W47

6.2V

30.2V

J
N
R

Q

P

F

E

POWER SUPPLY CIRCUIT

C

Q702
2SB1548PQAU

REGULATOR

-8V

R720 3.9K

C722 16V100

-0.6V

Q705
2SA1995RSTA

REGULATOR

R667

3.9K

IH

RL701

5

6.2V14.2V

29.4V

-30.3V-7.5V

C720

0.047

-8V

R651

1/4W10

0.1

C627

R672

R675

47K

3.9K

3.9K

R724

C718

10V100

0.7V

0.7V

34126

Q618

0V

R668

47K

Q617

0V

DCFG

C710

0.047

Q701
2SD2374PQAU

REGULATOR

15.4V

C717

16V33

: SOURCE SIGNAL LINE

RL602

68

D613

MA165TA

31572 4

R652

R725

10

D723

RL605

W722

W721

MA4150HTA

C624

R723

1/4W10

0.047

1
2
3
4

1
2
3
4
5
6
7
8
9

10

5.6K

C626

R646

0.1

1/4W10

31

68427 5

R669

1/2W47

R670

1/2W47

D614

MA615TA

29.4V14.8V

C719

0.047

B
A

C
D

B

E
A

SCHEMATIC DIAGRAM- 7

A

C631

0.047

B

C635

0.047

C637

0.047

C

C666

0.047

D

C636

0.047

C632

0.047

R642

R640

1/2W10

L601

1/2W10

R639

C620

1/4W10

0.047

R641

C621

1/4W10

0.047

L602

C

D

SPEAKERS
ToSB-EH760

JK601

HIGH(6

MID(6 )

LOW(8 )

JK602

HIGH(6 )

MID(6 )

LOW(8 )

: POSITIVE VOLTAGELINE

AC IN CIRCUIT

D

Q726
2SC3940AQSTA

REGULATOR

10.9V6.2V

)

Lch

Rch

R774

1/2W18

R773

1/2W18

D711

RL1N4003N02

0.01

C754

ACB

6.2V

C759

10V47

14.2V

6.9V

C753

D500

MA165TA

R771

2.2K

: NEGATIVEVOLTAGE LINE

D746

RL1N4003N02

0.01

C758

D744

D742

0.01

RL702

3 1

0V

0.7V

Q791
2SD2144STA

RELAYDRIVE

MA165TA

D741
D743

D740

R777

D747

T702

24

1K

MA4068LTA

D741-744

RL1N4003N02

C755

16V1000

F1 TA2

C791

1000P

47K

R794

D745

MA4051MTA

: SOURCE SIGNAL LINE
: SURROUND SP.DRIVESIGNALLINE
: CENTER SP.DRIVESIGNALLINE

A

C652

1000P

C651

0.047

B

C644

1000P

C646

0.047

C

C643

C645

0.047

1000P

JK701

Z701

R795

3.9K

R772

L701

22K

JK603

CENTER

)

(8

Rch

SURROUND

)

(8

Lch

AC IN

230V 50Hz E,EG
230- 240V 50Hz EB

W2/W3

W1

POWERTRANSFORMER

E

(A)

CIRCUIT

W722
1
2
3
4

1
2
3
4
5
6
7
8
9

10

W721

A
B
C
D
E

F
G

R791, 792

RSFMB40KT-L

R791

R792

R793

1

AC

23.3V

AC

23.3V

GCFBA DE

AC
12V

1

1

AC30V

CN701

CN702

CN703

CN704

CN705

CN706

CN707

CN708

CN709

CN710

AC

4.8V

AC
12V

CN601

111098765432 12

111098765432 12

A

B

1

1

CP601

CDE FG

T701

CN602

765432 8

765432 8

CP602 CP603

POWERTRANSFORMER

F

(B)

CIRCUIT

CN711

CN603

4

13 2

4

13 2

W1

For E,EG areas.

CN712

W3

For EB area.

CN713

W2

SCHEMATIC DIAGRAM-8

FM ANT

(75 )

AM ANT

EXT

LOOP

Z120 TUNER UNIT(RAN0005EM)

2SK360

2.7K47P

5P ~ 12P

33K

RF AMP

5P

100K

100K

0~5P

22P 15P

22P0.022

0.47 H

0.47 H

6 ~ 220

1P ~ 5P

0.022

2P

100

2SK360

FM OSC

100K

:POSITIVE VOLTAGELINE

6P ~ 10P

33K

33K

2SC2413

BUFFER AMP

8P

27P

10K 10K

:FM SIGNAL LINE
:FM OSC SIGNAL LINE

2SC2059

1 H

1000P

330

FM MIXER

680

820K ~ 2.2M

4P

27P

1P ~ 5P

2P

220

0.022
5P

18P

2.2K

680 ~

A

:AM SIGNAL LINE
:AM OSC SIGNAL LINE

10K

0.022

0 ~ 220

150

0.01

0.022

100

100

0.01

10K

5.6K

1000P

27P

10P ~ 33P

330P ~

580P

0.047

7.2MHz

100K

3.3K

10K

5 ~12P

22

10K

4.7

560

A OUT

DI

1K

AIN

CL

1K

27P~ 33P

20 19 18 17 16 15 14 13 12 11

Vss

X OUT

XIN

CE

1 2 3 4 5 6 7 8 9 10

1K

1K

ABCD

C

B

D

DZS5.1B

DD

PD

V

LC72131M

PLL FREQUENCY
SYNTHESIZER

DO

B01

470

FM IN

B02

1K

AM IN

B03

0.58

1000P

I02

B04

H

1000P

100

390

A

220

B

27K

22K~100K

100P0.01

I01 IF IN

10K

C

D

E

F

SCHEMATIC DIAGRAM-9

:POSITIVE VOLTAGELINE :FM SIGNAL LINE :AMSIGNALLINE :AM OSC SIGNAL LINE

10K

0.01

270 ~ 680

LA1833MN

FM/AM IF AMP,

A

D

B
C

DET/AM OSC,MIX/FM MPX

1K ~ 10K

3.3
1000P

24 23 22 21 20 19 18 17 16 15 14 13

AM OSC

AM OSC OUT

AFC

1000P

270K ~ 680K

47K

AM RF IN

2SC2413

FM IF AMP

4.7

AGC

330

0.01 ~ 0.068 10K~100K

AM OUT

10P ~

39P

100P ~ 1000P

330

DET OUT

270K ~

680K

2SC2413

FM IF AMP

1022K4.7

1K ~ 10K

150P

PILOT IN

DTA114

POWER SUPPLY
(FM:ON)

68K 0.1

0.018

1000P ~ 0.01

0.018

MPX IN

PILOT OUT

Rch OUT

Lch OUT

1K1

11K

100K

100K

B

4700P

A

4700P

4.7K ~ 22K

100

AM MIX OUT

REG

1

GND

AM IF IN

0.01

FM IF IN

1 2 3 4 5 6 7 8 9 10 11 12

22

0.1

0.022

ST

SD

470

470

AB

FM DET

5 ~ 150

1000P

Vcc

0.1

470

STRQ

FM/AM

2.7K 1

MONO

1

0.47

3.3K

1K ~ 10K

68

BADFC E

A

B

A
B
D
C

11

CL

B

To MAIN CIRCUIT(CP101)
on SCHEMATIC DIAGRAM-4

2SC2712

SWITCHING

DI

DO

Lch OUT

A

B

13 245678910

CE

DET

+B(2)SD+B(1)

Rch OUT

T.GND