Yamaha MFC2 Service Manual download pdf (Page 14)

ABCDE

1

2

3

4

5

6

7

YST-SW800

IC11A

IC11B

IC7A

AUTO STANDBY

SW3

AUTO POWER

ON/OFF CIRCUIT

VR3

VOLUME

L.P.F.

6dB/oct

B.P.F

Q33—36

L.P.F.

12dB/oct

3

61

5

76

8

IC7B

IC3

Q26, 27

4

2

D36

D40

D43

D39

Q37

2

HIGH CUT

VR2

PROTECTION

H/L

OFF

PWR

R162

C84

TIMER

IC5

MUSIC

SENSOR

IC4

8

4

6

3

7

Q41

PWR

REGULATOR

IC202

Q201

L

R

+

–

–

+

INPUT 1

L

R

INPUT 2

L

R

+

–

–

+

OUTPUT

IC6A

4

3

2

SW2

PHASE

SELECT

IC6B

L.P.F.

12dB/oct

6

8

BASS

SELECT

SW4

+

–

PRE DRIVE

Q5—12

POWER DRIVE

Q39, 3A/C

Q16—19

A.N.I.C

LIMITER

RY3

IC1, 2

Q32

D32, 33, 35

Q28—31

D28—31

0.1

SPEAKER

Q1C, 2C, 4A

Q20, 22, 24, 40

Q1A, 2A, 4C

Q15, 21, 23, 25

–B

+B

H.P.F.

12dB/oct

+

+

+12

–12

REGULATOR

POWER SUPPLY

IC8

IC9

POWER

SW201

+B

–B

POWER SUPPLY

STANDBY/ON

SW1

SUB

POWER SUPPLY

D203

RY201

T201

+

D48

D47

D49

D50

F201

L201

SWITCHING

POWER SUPPLY

Q202—207

D201, 202

D205—209

T202

16

15

14

13

12

11

7

8

5

4

2

1

6

3

See page 15

See page 14

■ BLOCK DIAGRAM

13

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 25 26

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