Technics SADV-280 Schematic

-

Z101 TUNER UNIT (RAN0005EM-2)

FM ANT

+B(FM)

RF AMP

FM

MIXER

FM OSC

+B(FM)

+B(FM)

24

1

AM
OSC
OUT

FM IF
IN

BUFFER

BUFEER

Vcc

9

+B2

IFT

AMP

3

REG

ALC

LEVEL

FM IF

DET

AM

OSC

FM IF

AMP

CURVE

FM

DET

FMDET

AFC

S-

AM ANT

Q607

MUTING

MUTING

+B4

(Q608)

Q605

Q902

MUTING

CONT.

17

GND

5

IN

PILOT

AM
OSC
COIL

+B2

16

MPX

PHASE

DET

VCO

+B2

FM / AM I F AMP,

DET /AM OSC,
MIX / FM MPX

(LA1833MN)

FM:ON

15

IN

OUT

PILOT

FF

STEREO
SWITCH

FM/AM

12

13

DECODER

FFFF

MONO

Lch

ST

7

14

Rch

PILOT

CANCEL

PILOT

DET

Rch

SD

DET

TUNER L/C

TUNER Rch

ToSOUNDPROCESSOR

(SH-DV280)

BLOCK DIAGRAM

A.GND

Lch IN
Rch IN

+B(10V)

SUR L
SUR R

S.W
MIC

-B(-10V)
V.GND

D.GND

CE/REQ

CLK

DATA

CT.GND

SH FL1

SH FL2

SYNC

W501

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19

20

+B5

-B3

From POWER

Rch

Rch

Rch

TRANSFORMER

BU4053BCFE2

IC201

SIGNAL SELECTOR

+B4

-B3

13

14

2

8

16

7

X1

X0

Y0

G

SW CONT.

VDD
VSS

ABC

11 10 9

12

1

Y1

15

AM

ANT

COIL

+B(FM)

19202122 23

18

AM

IN

OSC

AM RF

AM

AM

RF

MIX

AMP

AM

IF

AM/FM

IF

BUFFER

TUNING

DRIVE

AM

MIX

OUT

2

AM
IFT

AGC

AGC

COMP

AM IF

IN

4

AM

AM

DET

SD

68 1110

OUT

DET

STRQ

OUT

PLL FREQUENCY

SYNTHESIZER

(LC72131M)

+B(FM)

Power

+B1

supply

(FM:ON)

18

AOUT

17

AIN

REFERENCE

DIVIDER

1/6,1/17 4BIT

12 BIT

PROGRAMMABLE

DIVIDER

DATA SHIFT

REGISTER LATCH

BO4

BO3

BO2

98710

1/2

XOUT

FM IN

AM IN

VDD

PHASE DET

CHARGE PUMP

SWALLOWCOUNTER

IO2

IO1

12

16

PD

IFIN

11

UNIVERSAL

COUNTER

Power

Vss

19

ON

RESET

15

XIN

CE

BO1

7.2MHz

1

20

14

13

2
3

DI

4

CL

5

D0

CE1

DATA1

CLK1

DATA IN

6

+B2

SHSYNC

97

9596

SH DI

LC72 CE

SH DO

LC72 DI/ST

SH CK

LC72 CK

345

CE1

CLK1

DATA IN

21

94

SH CS

SH REQ

6

6CH

ST/AV.

C2BBFD000317

SYSTEM CONTROL / FL DRIVE

SD

LC72 DO

2

100

DATA1

SD

IC901

93

MUTE3

SEL/

TUNER

10

MIC DET

25

+B8

SA-DV280(EB,EG) BLOCK DIAGRAM

DET

4,10

2

7

VDDA/D

VssA/D

MPX IN

TEST

+B2

3,11

REFERENCE

VOLTAGE

ANTIALIASING

FILTER

TEST

C1BB00000527

RDS SIGNAL DEMODULATOR

1

57kHz

BPF

(SCF)

56

SMOOTHING

FILTER

CLK(4.332MHz)

IC151

CINFLOUTVREF

VREF

OSC/DIVIDER

XOUTXIN

89

X151

(4.33MHz)

Q606

MUTING

PLL

(57kHz)

MODE

12 13

CLOCK
RECOVERY
(1187.5kHz)

DATA

DECODER

RDS-ID

DETECT/

RAM

RST

CLK

DATA

IDR

Q609

(Q610)

15
14

16

MUTING

+B5

Q612

MUTING

CONT.

26

(25)

RSN311W64B

19

(18)

23

22

24

13

IC601

POWER AMP

POWER CONTROL

CIRCUIT

POWER CONTROL/

PROTECTION CIRCUIT

GND

1621

1047

-B2

D602

-B1

20

3

6

15

1

(2)

5

11

(12)

8

9

14

D601

N

+B7

+B3

Q601,602

PRO-

TECTOR

Q551,554,

555

Q553,556,

557

-B3 +B4

SIGNAL

LEVEL DET.

MOTOR

DRIVE

Rch

D906

Q503,D558

SWITCH-

ING

D974

D907

PHONES

SURROUND

Ω

(8 )

CENTER

Ω

(8 )

SPEAKERS

HF

Ω

(6 )

LF

Ω

(8 )

M

FAN MOTOR

AC IN

POWER

VR901

(VOLUME)

24 23

VR JOGA

30~37

FL901

VR JOGB

1~8G

FL DISPLAY

38~45,
47~50
52~71,
73~78

16

P1~38

X901

(6MHz)

17

XC IN

D931,933

XC OUT

79

(32.7kHz)

13 14

REGIN0

X902

XIN

80

X OUT

REGIN1

Z901
(REMOTE
SENSOR)

D954

( PLAY/REC)

29

82

REMO-

CON

TIMER

S.WOOFER)

+B8

D951

(DIGITAL

DD3VDD4

V

46 72

+B8

88

POWER

POWER

1

86

CHECK

MUTE

15

Vss

-VP

26

51

-VP

HP SW

Vss2

89

SA-DV280(EB,EG) BLOCK DIAGRAM

SASYNC

+B8

98

E DET

VDD1

VDD2

90

18

+B9

KEY

KARAOKE

11

AC IN

RESET

12

Q901,

RESET

D904

28

27

RDS CLK

RDS DATA

S.W LED

83

D306

()

91

MUTE2

C2BBFD000317

SYSTEM CONTROL / FL DRIVE

STAND-BY

81

IC901

KEY

SWITCH

(S901~908,

910~915)

KEY TU

19 20

AC IN

-B1

-B3

-B2

+B7

+B3

+B4

+B2

+B1

+B5

-VP

Q723

REGULATOR

Q711,712,725
REGULATOR

/STABILIZER

D702,704,

752,754,755

Q703,704

REGULATOR

Q701

REGULATOR

Q702,705

REGULATOR
/STABILIZER

Q707

REGULATOR

D701,703,

751,753,761

D717~720

D705

T701

POWER TRANSFORMER

+B6

RL702

RELAY
DRIVE

Q791

Z701

NOTES : SIGNAL LINE

F1

L701

AC IN

: FM SIGNAL
: AM SIGNAL
: FM OSC SIGNAL
: AM OSC SIGNAL
:AUDIO SIGNAL

( ) indicates pin No. Right channel.

SHSYNC

POWER

SASYNC

+B6

+B8

+B9

D902

D901

Q726

REGULATOR

Q708,709

SWITCH-

ING

D740

D746

FL DISPLAY
(FL901)

D741~744

FL1

FL2

T702

POWER

TRANSFORMER

SA-DV280(EB,EG) BLOCK DIAGRAM

Note: This printed circuit board diagram may be modified at any time with the development of new technology.

OPERATION P.C.B.

A

H

G

F

E

S915
(RDS
DISP MODE
PTY)

S914
(RDS
DISP MODE
PS)

S911

(TUNING )

S910

(TUNING )

J

R916

R913

R915

R914

J

S912

(TUNER/

R994

BAND)

R911

J

R940

R910

S908

R909

(INPUT

SELECTOR

D

R907

J

S907

(SET)

R906

J

S903

6

(FM AUTO/

MONO)

R905

J

C396

J

S905

(CLOCK/

TIMER)

C395

R904

R903

S902

C

S906

(TUNING

MODE)

(—DEMO)

B

JK903

(PHONES)

2

3

4

1

5

7

C923

W905

)

D904

J

C924

R902

J

R999

R976

Q901

B
C
E

J

J
J

R929

J

D905

C914

C916

C918

R928

D974

R946

R901

VR901

(VOLUME)

1

2
3

R930

R931

R932

R956

R987

R936

R935

J

R954

J
J

C901

100

C912

J

R952
C910

J

R944

C159

S904

( PLAY/

REC)

J

C905

1

C911

R921

C158

C157

C156

R926

L902

95

5

10

C925

R953

J

R918

R919

R934

R988

R937

R969

R958

C926

85

90

15

3
2
1

X902

J

R922

J

C917

(SENSOR)

3
2
1

X151

C915

R991

J

D906

81

20

X901

Z901

C154

R957

J

R959

R960

J

25

R925

910

D954

J

J

D961

R966

J

J

L901

IC901

30

J

R951

C908

R924

IC151

R157

REC)

( PLAY/

J

C902

Q902

E
C
B

J

C903

C921

R939
R986

J

80

75

R943

R945

C907

J

R961

R962

C151

15

R965

D151

158

16

R942

J
J

J

70

31

C155

N

R974

R993

65

35

J

R950

C919

C152

R941

R995

J

C928

D973

R990
R997

D933

60

40

C909

C904

J

L151

R158

J

J

C931

45

R949

C153

C160

J

J

R975

D931

55

D907

51

50

J

J

D901

C922

C927

R912

J

R996

FL901

W902B

15

14

J

13

12

11

S913

10

DIGITAL

9

8

S.WOOFER

7

6

5

4

3

2

D951

1

J

J

J

J

D902

W901B

C920

15

14

13

12

11

10

9

8

1

7

2

6

5

4

3

5

2

6

1
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

L153

34
35
36
37
38

J

39
40
41
42

J

43
44
45
46
47
48
49
50

53
54

L152

R151

R153

J

R155

R152

R154

To SOUND PROCESSOR

A

S901

( / )

D306

( )

(REP3337E-M)

MAIN P.C.B.

B

W902A

D607

J

CN781

14

10

12

9

10

R635

R719

8

8

7

6

6

J

5

4

4

2

3
2

J

1

J

J

C725

C664

J

Q723

14
12
10

8
6
4
2

J

J
J

C741

4
3
2
1

R764

R763

J

15
13
11

9
7
5
3
1

J

J

J

Q707

B
C
E

J

J

C731

J

J

C707

J

C761

J

J

R776

D717

D755

C702

C704

R708

E
C
B

D720

C714

D719

C740

C735

J

W501
19

17
15
13
11

J
J
J
J

R738

C708

20
18
16
14
12
10

9
7
5
3
1

J

8
6
4
2

C509

C706

ECB

ECB

R739

D703

J

D752

D702

J

Q609

ECB

ECB

Q610

J

R512

R510

J

J

D751

J

D701

J

J

J

J

R511

R509

C510

D721

J

J

J

Q708

Q709

C715

J

1234

J

J

J

R564

R693

R692
R597
R598

C602

J

J

D761

C703

J

C701

CP602

R563

J

J

J

R229

C656

J

J

C601

R204

C202

8

IC201

9

10

R202

Q704

J

Q703

D753

C629
C627

5678

J

J

R203

15

15

16

R205

D201

ECB

C723

J

C732

C626

C628

R651

CP101

J
J

C554

D583

Q554

C655

J

J

D552

J

R561

J

D757

Q555

R591

CB

E

C201

R559
R557

R211

C552

C724

D658

D756

Q551

R796

R797

R727

R729

ECB

J

Q503

J

R721

J

J

J

J

J

J

L606

R650

R649

R652

L605

J

J
J

1 2 3 4 5 6 8 910 1112

R570

B
C
E

R572
R544

R769

J

R558

E

Q556

D725

D558

J

R638

C709

Q553

D582

CB

D555

ECB

R569

C551

R556

C613

R608

C614

R555

B
C
E

R767

J

1234567891011

C559

ECB

D581

D554

C550

D551

R607

C721

C619

J

J

R722

J

J

J

J

J

CP601

7

R566

R560

C371

J

R623

C618

R637

J

Q557

R567

R622

R620
R546

R547

R624

C648

C617

J

C640

R568

ECB

JK551

12

E602

R552

R551

N

R648

E601

R642

J

C642

B
C
E

R621

C616
R627

J

C641

C660

C659

C612

R610

J

R619

J

D602
D601

C620

D553

C556

Q601

J

C622

Q602

R628

C647

R631

R615

R611

R691

J

R640

J

C630

B
C
E

C609

J

R647

J

C555

NN

NN

Q605

R688

Q607

R632

C611

J

J

L601

L602

C639

Q606

J

R604

R687

R614

J

R609

C605

C610

J

J

R639

J

C637

R601

C603

J

J

C606

R612

J

C632

C636

C635

E

E

C650

J

R605
R606
R617
R618

R684
R683

E
E

R603

R686
R685

CB

CB

R602

J

J

C621

CB
CB

C607

IC601

C604

C649

J

R641

JK602

JK601

Q608

26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

C631

C608

(REP3337E-M)

LF

(8 )

HF

(6 )Ω

LF

(8 )

HF

(6 )Ω

SPEAKERS

Ω

Rch

Ω

Lch

D737

J

Q612
B
C
E

J

R695

J

C733

J

J

J

D657

J

C705
J
J

C737

D705

W721A

10

9
8
7
6
5
4
3
2
1

J

J

R230

J

W901A

D659

J

J

J

J

D718

W722A

D704

D754

J

J

15
13

J

11

9
7
5

J

3
1

J

R761

R694

D611

J

R696

SA-DV280(EB,EG) OPERATION, MAIN P.C.B.

123456789101112

13

Note: This printed circuit board diagram may be modified at any time with the development of new technology.

H

POWER TRANSFORMER

E

(A) P.C.B.

POWER TRANSFORMER

F

AC IN P.C.B.

D

RL702

4

3

G

2

1

C791

F

E

F1 T2A

FC1 FC2

L701

JK701

W1

W2/W3

Z701

D

T702(Power transformer)

C644

C651

C646

C652

JK603

C
SR

SL

C753

J

L604

C625

C643

J

C755

C633

C645

D743

R643

Q791

C754
C758

J

R646

R644

R645

R794

ECB

D500

R777

J

D741

D742

C624

L603

R773

R774

Q726

ECB

J

D744

J

C634

R795
D740

J

D745

R771

D711

R772

R712

C759

D746

CN602

1
2
3

J

4
5

J

6
7

D747

8

CN601

1
2
3
4
5
6
7
8

9
10
11
12

REP3338A-S . . . [EG]
REP3338B-S . . . [EB]

W721B

10

R793

1
2
3
4
5
6
7
8
9

R798

W722B

1
2
3
4

FP791

FP792

J

(REP3337E-M)

CN701

CN702

CN703

CN704

CN705

CN706

CN707

CN708

CN709

CN710

AC IN

230V 50Hz . . . [EG]
230-240V 50Hz . . . [EB]

CENTER/
SURROUND
SPEAKERS

C

B

T701(Power transformer)

POWER SUPPLY P.C.B.

C

R725
R723

Q705

ECB

R724

D739

D738

B
C
E

D730
D758

C718

C722

R749

C717

R768

R765

W701B

C710

R720

C734

R753

R754

D723

10

9
8
7
6
5
4
3
2
1

Q701

Q702

Q711

Q712

B
C

C719

E

B
C
E

C720

B
C

Q725

E

J

B
C
E

(B) P.C.B.

CN711

CN713

W2

J

W3

CN712

J

REP3338A-S . . . [EG]
REP3338B-S . . . [EB]

J

W1

J

J

J

(REP3337E-M)

A

SA-DV280(EB,EG) AC IN, POWER TRANSFOMER(A)/(B), POWER SUPPLY P.C.B.

123456789101112

13

SCHEMATIC DIAGRAM-1

OPERATION CIRCUIT

A

H

G

F

E

D

C

B

150

R997

R996

150

D973

MA4030MTA

C921

1000P

JK903
PHONES

3.5mm STEREO

FL901 (A2BB00000084)

C922

35V33

W905

1 6 8 10 11 1213 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 42 43 44 45 46 47 48 49 50 53 542 5 7 9

C920

25V22

C928

25V22

S913

(DIGITAL

)

S.WOOFER

2
3
6
4
5
7
1

C923

NOTE:
The number which noted at the connectors onthe schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serial number located onthe left corner in the schematicdiagram.

FL DISPLAY

ABCDEFGHIJKLMNOPQRSTUVWXYZ

R912

4.7K

0.1

S908

S912

)

INPUT SELECTOR

(

(TUNER/ BAND)

C396

0.047

R907

3.3K

R911

3.3K

S907

S911

)
SET

(

)

TUNING,

(

C395

0.047

R906

2.2K

R910

2.2K

S906

S910

)

TUNING MODE

(

)

(TUNING,

R905

1.8K

R909

1.8K

S905

)

FM AUTO/MONO

(

R904

1.5K

S904

R916

1.5K

)

PLAY/ REC

(

ABCDEFGHI JKLMNOPQRSTU

R922

R921

10K

10K

R925

1K

R924

1K

C908

C907

C904

470P

470P

0.01

R944

C924

2.2K

0.1

R903

R9021KR901

1.2K

)

S903

DEMO
(-

R915

R9141KR913

1.2K

S

T

820

)

S902

CLOCK/ TIMER

(

820

)
PTY

S915

(

(RDS DISP MODE)

D974

MA165TA

S901

S914

)
/

(

)
PS

(

X

W

V

C919

C927

25V22

25V22

:AUDIO SIGNAL LINE: POSITIVE VOLTAGE LINE : NEGATIVEVOLTAGELINE

A
B

-

30.1V

-

30.1V
51

-

R990

100K

D306

29.3V

-

29.3V

-

29.3V

-

26.3V

-

20.5V

-

29.3V

-

29.3V

-

29.3V

-

23.5V

-

20.5V

-

23.4V

-

23.4V

-

23.7V

-

20.7V

-

29.6V

-

29.6V

-

29.6V

-

23.7V

-

26.6V

-

26.5V

5.1V

-

29.5V

-

29.5V

-

26.5V

-

17.2V

-

5.3V

-

10.3V

0.4V
0V

1.5K

R939

( )

SELS5223C

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

D954

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
Z

D931

MA165TA

D933 MA165TA

100K

R993

C916

6.3V100

C

ABCDEFGH I J K LMNOPQRST UVWX

23.4V-20.5V-26.3V-26.3V

-

P12

-

VP
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
V

DD4

P33
P34
P35
P36
P37
P38
REGIN0
REGIN1

STAND-BY

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

1.5K

R986

)

D951

PLAY/ REC

SELS5923C

LNJ301MPUJAD

(

5.1V

P11

P10

FM / AM

T 5.5ms.

F=32.7kHz

TIMER

S.W.LED

0V0V0V

220

R995

)

R994 100K

S.WOOFER

(DIGITAL

R999

23.4V-20.5V-26.2V

-

5.1V

P8P7P6P5P4P3P2

P9

DD3

V

IC901
C2BBFD000317

SYSTEM CONTROL/
FL DRIVE

FM / AM

2V
P-P

2V/2ms.DIV.

T

10ms.

LOUNGE

CHORUS

MUTENCPOWER

0V0V0V

4.8V

100K

R960 1.5K

R959 47

R958 1K

26.2V-26.2V-26.1V-26.3V-23.5V-23.5V

29.2V

-

-

FM / AM

4V
0V

-

30V

F=6MHz

FM / AM

F=32.7kHz

5V

0V

5V

0V

DD2

MUTE2NCMUTE3

Vss2

V

5.1V

5.1V

C905

1000P

2.7K

R969

23.5V

-

P1

1G2G3G4G5G6G7G

FM / AM

T 5.5ms.

FM / AM

F=6MHz

3.3V
P-P

5.2V
P-P

FM / AM

5.2V
P-P

F=32.7kHz

2V/2ms.DIV.

SHCS

SHDO

SHDI

0V

1.9V

1.4V

1.9V

R935 100

100

R936

27.5V-25.5V

-

4V
0V

-

30V

4.2V
P-P

KEY KARAOKE

SEL/ TUNER

5V

0V

SHCK

E DET

CR TIMER

5.1V

3.3V

R988 1K

R937 10K

R934 100

25.6V-27.5V

­3132333435363738394041424344454647484950

REMOCON

RDS DATA

RDS CLK

HP SW

MIC DET
VR JOGA
VR JOGB
NC(GND)

SH REQ

KEY TU

V

XC OUT

XC IN

X OUT

XIN

RESET

AC IN

SEL TUNER

ST/ AV.6CH

LC72 CK

LC72 DI/ ST

LC72 CE

LC72 DO

CHECK

SD

100

0V

C901

R987 1K

8G

DD1

Vss

6.3V100

30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

R926

2.2K

R919

15K

R991

47K

-

25.6V

5.1V

2.6V

2.6V

0.6V

5.1V
0V
0V

1.4V

5.1V

5.1V

5.1V

2.3V

2.3V

2.7V

1.6V
5V

2.2V
0V

5.1V

5.1V

4.6V
0V
0V

2.5V

R976

100K

R918 10K

C903

R953 100

D905 1SS291TA

R928 47K

L902 1 H

0.01

R954
100K

4.7K

R949

100

R950

0.1

C912

18P

C911

C926

1000P

D902

1SS291TA

5V

A
B
C

D
E

R952

10M

X902

(32.7kHz)

5.1V

Q901
UN4212TA

RESET

C925

R9561KR957

C915

R940

R929 1K
R930 1K
R932 1K
R931 1K

X901

(6MHz)

1

3

330K

R951

20P

C910

0V

1000P

0.01

1K

D901

1SS291TA

C914

D904

1K

2

50V2.2

MA165TA

L901

10 H

C902

10V1000

U
J

H

G
A
B
D
C

EFIKLMNO Q

A

SA-DV280(EB,EG) OPERATIONCIRCUIT DIAGRAM

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