Yamaha A-S3000 Service Manual page 68

A B C
A-S3000
FUNCTION 2/2
1
R E S I S T O R
C A P A C I T O R
R E M A R K S P A R T S N A M E R E M A R K S
N O M A R K C A R B O N F I L M R E S I S T O R ( P = 5 ) N O M A R K
C A R B O N F I L M R E S I S T O R ( P = 1 0 )
M E T A L O X I D E F I L M R E S I S T O R N O M A R K
M E T A L F I L M R E S I S T O R
M E T A L P L A T E R E S I S T O R
F I R E P R O O F C A R B O N F I L M R E S I S T O R
C E M E N T M O L D E D R E S I S T O R
2
S E M I V A R I A B L E R E S I S T O R
P
C H I P R E S I S T O R
N O T I C E
( m o d e l )
J J A P A N
U U . S . A
C C A N A D A
R G E N E R A L
T C H I N A
K K O R E A
A A U S T R A L I A
B B R I T I S H
G E U R O P E
L S I N G A P O R E
E S O U T H E U R O P E
V T A I W A N
F R U S S I A N
3 P L A T I N A M E R I C A
S B R A Z I L
H T H A I
4
5
6
1 0 K 4 7 K
R 7 1 1 R 7 1 4
4 7 K 1 0 0 K
R 7 1 5 R 7 4 1
A 1 0 3 7 A K ( Q / R / S )
1 / 5 0
C 7 1 3
R 7 2 0 1 5 K
1 5 K D 2 7 0 4 ( K ) D 2 7 0 4 ( K ) R 7 3 9
1 0 0 K R 7 3 3
R 7 2 7 1 0 0 K
+18.6
7
1 . 5 K 1 . 5 K
R 7 2 9 R 7 3 1
3 3 0 K 3 3 0 K
R 7 2 2 R 7 4 0
1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2
N J U 7 2 3 2 1 I C 7 1 7
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2
C B 7 1 6
- 1 2 C
1
N _ M T _ M A I N M T _ M A I N _
8 P
2
R Y _ T C B Y P R Y _ T C B Y P _ 1 0 0 / 3 5
3
C 7 2 0 C 7 2 3
S W _ T R E S W _ T R E _
4
n o _ u s e
S W _ B A S S W _ B A S _
5 R 7 3 6
1 0 0 / 3 5 n o _ u s e
E V _ D T E V _ D T _
6
E V _ C K E V _ C K _ R 7 3 7
7 n o _ u s e
E V _ L B A S E V _ L B A S _ R 7 3 8
8
E V _ L T R E E V _ L T R E _
Page 66 D9 9
E V _ L C O M E V _ L C O M _
1 0
to INPUT (3)_CB908 E V _ R C O M E V _ R C O M _
1 1
E V _ R T R E E V _ R T R E _
1 2
E V _ R B A S E V _ R B A S _
1 3
M G
1 4
+ 5 S
1 5
B A L 2 _ P L T Y B A L 2 _ P L T Y _
1 6
B A L 1 _ P L T Y B A L 1 _ P L T Y _
1 7
B A L 2 G _ D E T B A L 2 G _ D E T _
1 8
B A L 1 G _ D E T B A L 1 G _ D E T _
1 9
1 9 P S L - J E
9
10
68
D E F
Page 69 B10
to MAIN (2)_CB201
T O P O W E R A M P
& H E A D P H O N E
P A R T S N A M E
E L E C T R O L Y T I C C A P A C I T O R
T A N T A L U M C A P A C I T O R
C E R A M I C C A P A C I T O R
C E R A M I C T U B U L A R C A P A C I T O R
P O L Y E S T E R F I L M C A P A C I T O R
P O L Y S T Y R E N E F I L M C A P A C I T O R
M I C A C A P A C I T O R OUT L
P O L Y P R O P Y L E N E F I L M C A P A C I T O R
S E M I C O N D U C T I V E C E R A M I C C A P A C I T O R
4 7 / 3 5 4 7 / 3 5
C 7 4 5 C 7 6 4 1 P 2 . 2
1 P 2 . 2 R 8 4 4
R 8 2 6
C R 5 1 3 P A R 5 1 3 P C R 5 1 3 P A R 5 1 3 P
Q 7 1 9 Q 7 2 5 Q 7 3 0 Q 7 3 5
1 P 6 8 1 P 6 8 1 P 6 8 1 P 6 8
R 7 7 2 R 7 8 5 R 8 1 6 R 8 2 2
1 0 0 P / 6 3 0 1 0 0 P / 6 3 0 1 0 0 P / 6 3 0 1 0 0 P / 6 3 0
C 7 4 1 C 7 5 1 C 7 5 8 C 7 7 1 C 7 7 9
C 7 6 0
1 0 0 / 5 0 C 3 3 2 4 - G R , B L ( T E 8 1 0 0 / 5 0
A 1 3 1 2 - G R , B L ( T E 8 A 1 3 1 2 - G R , B L ( T E 8 C 3 3 2 4 - G R , B L ( T E 8
Q 7 2 6 2 . 9 6 m A Q 7 2 9 Q 7 3 6
Q 7 1 8 D 7 1 1 D 7 1 3 D 7 1 5 D 7 2 1 D 7 2 3 D 7 2 5
2 7 0 2 0 0 2 7 0 2 0 0
R 7 6 2 1 S S 3 5 5 V M 1 S S 3 5 5 V M R 7 9 9 R 8 0 2 1 S S 3 5 5 V M 1 S S 3 5 5 V M R 8 3 8
1 0 0 0 P / 1 0 0 1 S S 3 5 5 V M 1 0 0 0 P / 1 0 0 1 S S 3 5 5 V M 3 . 0 m A
1 0 0 1 0 0
P P
C 7 3 9 R 7 6 7 C 7 5 9 R 8 0 7
D 7 1 8
D 7 1 6
3 3 K
R 7 8 7
1 S S 3 5 5 V M
1 S S 3 5 5 V M
R 7 0 2 7 . 5 K R 7 0 4 7 . 5 K
Q 7 2 3 Q 7 3 3
R 7 8 9 R 8 2 7
0 0
Q 7 2 0 Q 7 3 1
4 7 0 4 7 0
K 2 0 9 K 2 0 9
n o _ u s e n o _ u s e n o _ u s e R 7 9 0 n o _ u s e n o _ u s e n o _ u s e R 8 2 8
C 3 3 2 4 - G R , B L ( T E 8 C 3 3 2 4 - G R , B L ( T E 8
n o _ u s e n o _ u s e 1 . 2 8 m A
R 7 6 3 R 8 0 3
D 7 1 4 D 7 2 4
2 . 2 K 2 . 2 K
Q 7 2 1 Q 7 3 2
R 7 6 4 R 8 0 4
R 7 0 1 R 7 0 3
1 . 4 V
0 0
C 8 7 5 C 8 7 6
P P
1 0 0 P / 6 3 0 1 0 0 P / 6 3 0
1 M 1 M
D 2 7 0 4 ( K ) D 2 7 0 4 ( K )
R 1 0 0 2 R 7 9 7 R 8 0 8 R 1 0 0 3
0 0
R 9 9 9
1 0 0 K
E C 2 - 2 4 N U - F
E C 2 - 2 4 N U - F
E C 2 - 2 4 N U - F
R Y 7 1 1 R Y 7 1 1
R Y 7 1 1
1 S S 3 5 5 V M
D 7 1 7 R 8 1 9 R 8 2 9
2 . 2 M 2 . 2 M
0 . 0 4 7 / 1 0 0
R 7 4 9 4 7 K
R 7 5 1
1 0 K
& 4
Q 7 1 5
4 7 K
R 7 5 0 1 0 0 K
A 1 0 3 7 A K ( Q / R / S )
R 7 8 6
1 / 5 0 C 7 3 4
4 7 0
4 7 0
R 7 5 6 D 2 7 0 4 ( K ) D 2 7 0 4 ( K ) R 7 8 3
1 0 0 K 1 0 0 K
R 7 6 6 R 7 7 9
-18.7 +18.6 -18.7 +18.6
n o _ u s e n o _ u s e
2 . 2 K 2 . 2 K
R 7 6 9 R 7 7 1 R 8 2 1 R 8 2 5
3 3 0 K 3 3 0 K 3 3 0 K 3 3 0 K
R 7 5 8 R 7 8 4 R 8 1 2 R 8 3 7
1 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
N J U 7 2 3 2 1 I C 7 1 8 N J U 7 2 3 2 1 I C 7 1 9
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2
P P
1 0 0 / 3 5 1 0 0 / 3 5
0 0
C 7 4 3 C 7 4 7 C 7 7 2 C 7 7 5
R 7 4 3 R 7 9 1 R 8 4 0
0 n o _ u s e 0 n o _ u s e
R 7 4 4 R 7 8 0 R 7 9 2 R 8 3 3 R 8 4 1
1 0 0 / 3 5 n o _ u s e 1 0 0 / 3 5 n o _ u s e
0 0
R 7 4 5 R 7 8 1 R 7 9 3 R 8 3 4 R 8 4 2
0 n o _ u s e 0 n o _ u s e
R 7 4 6 R 7 8 2 R 7 9 4 R 8 3 5 R 8 4 3
C 7 2 9 C 7 5 5 C 7 8 4
1 0 P ( C H ) 1 0 P ( C H ) 1 0 P ( C H )
C 7 3 0 C 7 5 6 C 7 8 5
1 0 P ( C H ) 1 0 P ( C H ) 1 0 P ( C H )
C 7 3 1 C 7 5 7 C 7 8 6
1 0 P ( C H ) 1 0 P ( C H ) 1 0 P ( C H )
1 S S 3 5 5 V M 1 S S 3 5 5 V M
D 7 1 9 D 7 2 8
1 S S 3 5 5 V M 1 S S 3 5 5 V M
D 7 2 0 D 7 2 9
S W 7 1 1 S W 7 1 3 S W 7 1 2 S W 7 1 4
A T E 1 D - 5 M 3 - 1 0 - Z A T E 1 D - 5 M 3 - 1 0 - Z A T E 1 D - 5 M 3 - 1 0 - Z A T E 1 D - 5 M 3 - 1 0 - Z
B A L 1 G A I N S e l e c t B A L 2 G A I N S e l e c t
S T 7 1 1
B A L 1 P o l a r i t y S e l e c t B A L 2 P o l a r i t y S e l e c t
ATT. ATT.
BYPASS NORMAL INV. BYPASS (-6dB) NORMAL INV.
(-6dB)
ATTENUATOR PHASE ATTENUATOR PHASE
BAL 1 BAL 2
G H
Page 69 B5
to MAIN (1)_CB101
T O P O W E R A M P
& H E A D P H O N E
1 P 2 . 2
R 8 5 7
4 7 / 3 5
C 8 0 9
1 P 2 . 2
R 8 6 0
C R 5 1 3 P A R 5 1 3 P
Q 7 4 4 Q 7 4 9
1 P 6 8 1 P 6 8
1 0 0 / 3 5 1 0 0 / 3 5
R 8 7 2 R 8 7 7
C 7 8 9 C 7 9 0
1 0 0 P / 6 3 0 1 0 0 P / 6 3 0
C 8 0 8
C 4 5 1 1 ( O / P / Y ) A 1 7 2 5 ( O / P / Y ) C 7 9 9 C 8 1 5
Q 7 3 9 Q 7 4 0 1 0 0 / 5 0 C 3 3 2 4 - G R , B L ( T E 8
A 1 3 1 2 - G R , B L ( T E 8 A 1 3 1 2 - G R , B L ( T E 8
Q 7 5 1
Q 7 4 3 D 7 4 2 D 7 4 3 D 7 4 5
2 7 0 2 0 0 2 7 0
D 7 3 1 D 7 3 4
R 8 4 9 R 8 5 0 R 8 5 8 1 S S 3 5 5 V M 1 S S 3 5 5 V M R 8 9 4 R 9 0 0
1 0 0 0 P / 1 0 0 1 S S 3 5 5 V M 1 0 0 0 P / 1 0 0
2 7 K 2 7 K 1 0 0
U D Z V 2 0 B U D Z V 2 0 B P P
R 8 6 4
C 7 9 5 C 8 2 3
3 3 K
R 8 7 9
R 7 0 6 7 . 5 K
Q 7 4 7
R 8 8 2
0
Q 7 4 5
4 7 0
C 8 8 4
K 2 0 9
n o _ u s e n o _ u s e n o _ u s e R 8 8 1
2 . 2 / 5 0 C 3 3 2 4 - G R , B L ( T E 8
A 1 0 3 7 A K ( Q / R / S ) n o _ u s e
R 8 6 2
R 1 0 0 6 D 7 4 4
8 2 2 . 2 K
Q 7 4 6
R 8 6 3
R 7 0 5
R 1 0 0 0
0
1 0 0 K C 8 7 7
P
A 1 0 3 7 A K ( Q / R / S )
1 0 0 P / 6 3 0
1 M
D 2 7 0 4 ( K ) D 2 7 0 4 ( K )
R 1 1 3 6 R 1 0 0 1 R 1 0 0 4 R 8 9 0
4 7 K 4 7 K 0
1 P 1 0 0 M M
Z F 9 0 9 8 0
W 7 1 2
1 P U L 1 0 1 5 1 0 0 B L O T Y P
Page 65 F1
to INPUT (1)_ST901
E C 2 - 2 4 N U - F
R Y 7 1 2
E C 2 - 2 4 N U - F E C 2 - 2 4 N U - F
R Y 7 1 2 R Y 7 1 2
1 S S 3 5 5 V M
D 7 3 5
2 . 2 M
2 . 2 M R 8 8 6
R 8 7 1
+18.6 +18.6
-18.7 -18.7
R 9 0 3
T F Z G T R 1 8 B T F Z G T R 1 8 B
T F Z G T R 1 8 B T F Z G T R 1 8 B 1 2 K 1 2 K
1 2 K 1 2 K
1 0 K
R 8 5 5 Q 7 5 3
R 8 4 7 R 8 4 8 D 7 3 3 R 8 5 1 D 7 3 8
D 7 3 0 D 7 3 2
Q 7 3 7 Q 7 3 8 Q 7 4 1 Q 7 4 2 A 1 0 3 7 A K ( Q / R / S )
C 4 5 1 1 ( O / P / Y ) A 1 7 2 5 ( O / P / Y ) C 4 5 1 1 ( O / P / Y ) A 1 7 2 5 ( O / P / Y )
1 / 5 0
-18.7 +18.6 -18.7
n o _ u s e n o _ u s e
R 8 7 6 R 8 8 0
3 3 0 K 3 3 0 K
R 8 6 7 R 8 9 2
1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
N J U 7 2 3 2 1 I C 7 2 0
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2
P
1 0 0 / 3 5
0 0
C 8 0 6 C 8 1 1
R 8 9 6
0 n o _ u s e 0
R 8 8 7 R 8 9 7
1 0 0 / 3 5
0 n o _ u s e 0
R 8 8 8 R 8 9 8
0 n o _ u s e 0
R 8 8 9 R 8 9 9
C 8 2 0
1 0 P ( C H )
C 8 2 1
1 0 P ( C H )
C 8 2 2
1 0 P ( C H )
IN L
1 S S 3 5 5 V M 1 S S 3 5 5 V M
D 7 3 9 D 7 4 8
1 S S 3 5 5 V M 1 S S 3 5 5 V M
D 7 4 0 D 7 4 9
C 7 9 2 n o _ u s e
P
n o _ u s e
R 8 5 3
D 7 3 6
n o _ u s e J 7 1 2
1 S S 3 5 5 V M 1 S S 3 5 5 V M
n o _ u s e J 7 1 1
J 7 1 6 D 7 3 7
n o _ u s e
C 7 9 3 n o _ u s e
P
n o _ u s e R 8 5 4
S T 7 1 2
S T 7 1 3
I N P U T ( 1 )
I N P U T ( 1 ) C B 9 0 5
C B 9 0 2
Page 65 G1 Page 65 F1
to INPUT (1)_CB902 to INPUT (1)_CB905
I J K
FUNCTION (2)
4 7 / 3 5
C 8 2 4
T F Z G T R 1 3 B T F Z G T R 1 3 B
D 7 5 7 D 7 5 8
1 0 0 / 1 6 1 0 0 / 1 6
C 8 4 8 C 8 5 3
C R 5 1 3 P A R 5 1 3 P
Q 7 5 5 Q 7 6 0
1 P 6 8 1 P 6 8
1 0 0 P / 6 3 0 C 8 5 4
P
R 9 1 0 R 9 1 7
1 0 0 P / 6 3 0
C 8 4 9
1 0 0 P / 6 3 0 1 0 0 P / 6 3 0
5 . 1 K 5 . 1 K
C 8 3 0
C 8 2 5 C 8 3 7 R 9 5 7 R 9 6 2
1 0 0 / 5 0 C 3 3 2 4 - G R , B L ( T E 8
Q 7 5 4 Q 7 6 3
D 7 5 1 D 7 5 2 D 7 5 4
2 0 0
1 S S 3 5 5 V M 1 S S 3 5 5 V M R 9 3 2
1 S S 3 5 5 V M +13.3 -13.2
1 0 0
R 9 0 4 D 7 4 6
D 7 4 7 S 2 0 0 0 ( 7 5 m A ) - 2 9 m A
1 S S 3 5 5 V M 1 S S 3 5 5 V M
R 7 7 7 7 . 5 K
Q 7 5 8
R 9 2 6
0
Q 7 5 6
4 7 0
K 2 0 9
n o _ u s e R 9 2 4
n o _ u s e n o _ u s e C 3 3 2 4 - G R , B L ( T E 8
n o _ u s e
R 9 0 1
D 7 5 3
2 . 2 K
Q 7 5 7 Q 7 5 9
R 9 0 2
R 7 0 7 K 2 0 9
0
C 8 7 8
P
1 0 0 P / 6 3 0
1 M
R 9 0 6 R 1 0 0 5
0
Page 65 K1
T o I N P U T C B 9 0 3
to INPUT (1)_CB903
A 1 0 3 7 A K ( Q / R / S )
4 7 K
1 0 K R 9 5 8
R 9 0 7
R 9 5 6 4 7 K
& 4 4 7 K Q 7 6 5
R 9 0 8 1 0 0 K 4 7 K 1 0 0 K
R 9 5 9 R 9 9 6
R 9 5 1
1 / 5 0
C 8 2 6 C 8 5 1
R 9 1 6 4 7 0 1 5 K R 9 8 9
4 7 0 D 2 7 0 4 ( K ) D 2 7 0 4 ( K ) R 9 4 4 R 9 6 7 D 2 7 0 4 ( K ) D 2 7 0 4 ( K ) 1 5 K
1 0 0 K 1 0 0 K 1 0 0 K R 9 8 2
R 9 2 7 R 9 3 9 R 9 7 5 1 0 0 K
+18.6 -18.7 +18.6 -18.7
2 . 2 K 2 . 2 K 1 . 5 K 1 . 5 K
R 9 3 0 R 9 3 5 R 9 7 9 R 9 8 1
3 3 0 K 3 3 0 K 3 3 0 K 3 3 0 K
R 9 1 9 R 9 4 3 R 9 7 1 R 9 9 0
1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
N J U 7 2 3 2 1 I C 7 2 1 N J U 7 2 3 2 1 I C 7 2 2
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2
P P
1 0 0 / 3 5 1 0 0 / 3 5
0 0
C 8 3 5 C 8 3 9 C 8 6 1 C 8 6 4
R 9 4 7 R 9 9 2
n o _ u s e 0 n o _ u s e 0
R 9 4 0 R 9 4 8 R 9 8 6 R 9 9 3
1 0 0 / 3 5 n o _ u s e 1 0 0 / 3 5 n o _ u s e
0 0
R 9 4 1 R 9 4 9 R 9 8 7 R 9 9 4
n o _ u s e 0 n o _ u s e 0
R 9 4 2 R 9 5 0 R 9 8 8 R 9 9 5
C 8 4 5 C 8 7 0
1 0 P ( C H ) 1 0 P ( C H )
C 8 4 6 C 8 7 1
1 0 P ( C H ) 1 0 P ( C H )
C 8 4 7 C 8 7 2
1 0 P ( C H ) 1 0 P ( C H )
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
L M N
Page 69 M3 Page 69 M3 Page 66 L2
to MAIN (3)_ST325 to MAIN (3)_CB305 to INPUT (2)_CB801
T o M A I N ( 3 )
C B 3 0 5 I N P U T ( 2 )
1 0 0 / 5 0 1 0 0 / 5 0
C 7 8 C 7 9
U D Z V 6 . 2 B U D Z V 6 . 2 B
R 1 1 4 4 R 1 1 4 5
2 2 K 2 2 K
D 7 6 1 D 7 6 2
D 5 9 1 P 2 . 7 K D 6 0
R 7 5
R 6 6 1 P 2 . 7 K A 1 0 3 7 A K ( Q / R / S )
U D Z V 3 . 3 B C 2 4 1 2 K ( Q / R / S ) U D Z V 3 . 3 B
3 3 / 5 0 S - 2 0 2 T R 5 0 3 3 / 5 0
C 8 2 D 5 2 n o _ u s e C 8 3
n o _ u s e
1 0 K 1 P 3 3 0 1 P 3 3 0 1 0 K
R 6 9 A R 5 1 3 P R 6 7 R 6 8 R 7 0
-25.68V(Vceo) +14.26V(Vceo)
1 0 K 1 P 3 3 0 1 P 3 3 0 1 0 K
R 7 1 A R 5 1 3 P R 7 2 R 7 3 2 2 0 K C R 5 1 3 P R 7 4
-25.96V(Vceo) R 4 9 1 8 0 K +14.67V(Vceo)
2 2 0 K R 4 7
R 4 8 1 8 0 K
R 4 6
1 P 5 6 4 7 / 3 5 4 7 / 3 5
R 7 6
C 8 8 C 8 9
-7.76V(Vceo) 1 P 5 6
n o _ u s e
+2.11V(Vceo) R 7 7
R 7 8
C 4 5 1 1 ( O / P / Y ) n o _ u s e
4 7 / 3 5 4 7 / 3 5
1 P 3 3 R 7 9
-5.88V(Vceo)
R 8 0 n o _ u s e C 9 0 C 9 1
C 4 5 1 1 ( O / P / Y ) 1 P 3 3
n o _ u s e
+0.61V(Vceo) R 8 1
R 8 2
n o _ u s e
R 8 3
H S 5 2
n o _ u s e
A 1 7 2 5 ( O / P / Y ) 4 7 / 3 5 4 7 / 3 5
1 P 3 3 C 9 2 C 9 3 C 4 5 1 1 ( O / P / Y )
R 8 4
1 P 3 3
-6.09V(Vceo)
R 8 5
A 1 7 2 5 ( O / P / Y ) 4 7 / 3 5 4 7 / 3 5
+0.44V(Vceo)
C 9 4 C 9 5
1 P 3 3 C 4 5 1 1 ( O / P / Y )
R 8 6
1 P 3 3
-5.77V(Vceo)
R 8 7
A 1 7 2 5 ( O / P / Y ) +0.31V(Vceo)
1 P 4 7 4 7 / 3 5 4 7 / 3 5
C 4 5 1 1 ( O / P / Y )
n o _ u s e
R 8 8
C 9 6 C 9 7
1 P 4 7
-8.51V(Vceo)
n o _ u s e
R 8 9
A 1 7 2 5 ( O / P / Y )
+2.96V(Vceo)
4 7 / 3 5 4 7 / 3 5
1 P 4 7 C 4 5 1 1 ( O / P / Y )
n o _ u s e
R 9 0 C 9 8 C 9 9
1 P 4 7
-8.56V(Vceo)
n o _ u s e
R 9 1
1 0 0 / 5 0
+3.3V(Vceo)
1 2 0 K C 8 0
R 9 2 1 2 0 K 1 0 0 / 5 0
R 9 3
1 2 0 K C 8 1
R 9 4 1 2 0 K
1 8 0 K R 9 5
R 9 6
1 8 0 K
1 8 0 K R 9 7
R 9 8 1 8 0 K
R 9 9 L I N E 2 + 2 0 V
L I N E 2 - 2 0 V
V O L 1 + 1 8 V +18.6
V O L 1 - 1 8 V -18.7
V O L 2 + 1 8 V +18.6
V O L 2 - 1 8 V -18.7
S T 7 1 5
IC717–722: NJU72321
IC710-715: OP275GSR
2-ch electronic volume
Dual bipolar/JFET,
audio operational amplifier
OUT A 1 8 V+
-IN A 2 7 OUT B InL
26
+IN A 3 6 -IN B
3
V- 4 5 +IN B
InR
23
IC716: NJM2068MD-TE2
14
Dual operational amplifier
V+ Zero Cross Detection
OUT 1 1 8 +V CC
D_VDD
22,24 17
+5V
–IN OUT Control Logic
1 2 7 2
25,27
+ – + – 21
D_REF
30-32
+IN 1 3 6 -IN
2 18 19 20 29
V-
D_GND
–V CC 4 5 +IN 2
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
and must be replaced ● 印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。