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