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JVC RX-F31S Service Manual page 21

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PWM modulator section
R 3 1 9
C 3 1 3
3 3 p / 5 0
4 . 7 k
R 3 1 7
1 0 0 k
R 3 0 9
C 3 0 5
C 3 0 7
1 8 k
0 . 0 0 2 2 / 5 0
0 . 0 0 2 2 / 5 0
R 3 0 7
1 . 5 M
C 3 1 7
C 3 3 3
C 3 3 5
4 7 0 p
C 3 0 1
R 3 0 3
1 0 0 p / 5 0
R 3 5 3
1 k
1 k
1 / 5 0
F R O N T + 6 d B
3 2
3 1
3 0
F R O N T _ L c h
-
+
I C 3 0 1
J C V 8 0 1 5 - X
S U R R O U N D _ R c h
1
2
3
C 8 0 2
R 8 0 4
1 k
1 / 5 0
R 8 0 8
1 . 5 M
0 . 0 0 2 2 / 5 0
R 8 1 0
C 8 0 6
C 8 0 8
1 8 k
R 8 0 2
0 . 0 0 2 2 / 5 0
R 8 1 8
1 0 0 k
C 8 1 4
R 8 2 0
3 3 p / 5 0
4 . 7 k
C 3 1 4
R 3 2 0
3 3 p / 5 0
4 . 7 k
R 3 1 8
1 0 0 k
R 3 1 0
C 3 0 6
C 3 0 8
1 8 k
0 . 0 0 2 2 / 5 0
0 . 0 0 2 2 / 5 0
R 3 0 8
1 . 5 M
C 3 1 8
C 3 3 6
4 7 0 p
C 3 0 2
R 3 0 4
1 0 0 p / 5 0
R 3 5 4
1 k
1 k
1 / 5 0
3 2
3 1
3 0
C N 5 2 2
F R O N T + 6 d B
F R O N T _ R c h
Q G B 1 2 2 4 J 1 - 1 3
0 V
F L
1
-
0 V
+
F . G N D
2
0 V
F R
3
0 V
S L
4
0 V
S . G N D
5
0 V
S . G N D
6
0 V
S R
7
0 V
C
8
0 V
C . G N D
9
0 V
I C 8 0 1
C . G N D
1 0
S U R R O U N D _ L c h
J C V 8 0 1 5 - X
0 V
S B
1 1
1
2
3
6 . 9 V
+ 7 V
1 2
- 7 . 0 V
C 8 0 1
- 7 V
R 8 0 3
1 3
1 k
1 / 5 0
R 8 0 7
1 . 5 M
0 . 0 0 2 2 / 5 0
R 8 0 9
C 8 0 5
C 8 0 7
1 8 k
R 8 0 1
0 . 0 0 2 2 / 5 0
R 8 1 7
1 0 0 k
C 8 1 3
R 8 1 9
3 3 p / 5 0
4 . 7 k
C 9 1 3
R 9 1 9
3 3 p / 5 0
4 . 7 k
R 9 1 7
1 0 0 k
R 9 0 9
C 9 0 5
C 9 0 7
1 8 k
0 . 0 0 2 2 / 5 0
0 . 0 0 2 2 / 5 0
R 9 0 7
1 . 5 M
C 9 1 7
C 9 3 4
C 9 0 1
4 7 0 p
R 9 0 3
1 0 0 p / 5 0
R 9 5 2
1 k
1 k
1 / 5 0
3 2
3 1
3 0
C E N T E R + 3 d B
C E N T E R c h
-
+
I C 9 0 1
J C V 8 0 1 5 - X
S U R R O U N D _ B A C K c h
1
2
3
E X C E P T B / E / E N / E V
C 9 0 2
R 9 0 4
1 k
1 / 5 0
R 9 0 8
1 . 5 M
0 . 0 0 2 2 / 5 0
R 9 1 0
C 9 0 6
C 9 0 8
1 8 k
R 9 0 2
0 . 0 0 2 2 / 5 0
R 9 1 8
O N L Y B , E , E N , E V
R 9 0 6 , R 9 0 8 , R 9 2 4 , R 9 3 2 , C 9 2 0 ; S H O R T
1 0 0 k
C 9 1 4
R 9 2 0
O T H E R ; O P E N
3 3 p / 5 0
4 . 7 k
R 1 3 7 3
1 k
F B 1 _ L
R 3 2 5
R 3 3 1
F B 2 _ L
1 0 k
1 0 0 k
C 3 2 1
C 3 1 5
Q 3 0 1
R 3 2 3
K T A 1 5 0 4 / Y G /
R 3 4 1
R 3 4 3
P W M _ L
1 / 5 0
1 M
- 2 . 5 V
8 2 0
4 7 0
- 3 0 . 5 V
- 2 . 2 V
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
-
8
7
-
+
-
+
-
+
+
L i m i t e r
Low V &
Termal
Warning
R e g u l a t o r
L i m i t e r
1
2
I C 3 0 2
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
R 8 2 4
C 8 2 2
1 M
- 2 . 2 V
C 8 1 6
R 8 3 2
R 8 4 2
R 8 4 4
1 0 0 k
- 2 . 5 V
P W M _ S R
0 . 0 0 1 8 / 5 0
Q 8 0 2
8 2 0
4 7 0
K T A 1 5 0 4 / Y G /
R 8 2 6
- 3 0 . 5 V
1 0 k
C 3 4 3
N I
R 1 8 7 4
F B 2 _ S R
1 k
F B 1 _ S R
F B 1 _ R
R 1 3 7 4
F B 2 _ R
1 k
R 3 2 6
R 3 3 2
1 0 k
1 0 0 k
C 3 2 2
C 3 3 4
C 3 1 6
Q 3 0 2
R 3 4 2
K T A 1 5 0 4 / Y G /
R 3 4 4
R 3 2 4
P W M _ R
1 / 5 0
1 M
8 2 0
- 2 . 5 V
4 7 0
- 3 0 . 5 V
- 2 . 2 V
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
-
-
+
+
-
-
+
+
L i m i t e r
Low V &
Termal
Warning
R e g u l a t o r
L i m i t e r
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
R 8 2 3
C 8 2 1
1 M
- 2 . 2 V
R 8 3 1
- 3 0 . 5 V
C 8 1 5
R 8 4 1
R 8 4 3
1 0 0 k
- 2 . 5 V
P W M _ S L
0 . 0 0 1 8 / 5 0
8 2 0
4 7 0
Q 8 0 1
R 8 2 5
K T A 1 5 0 4 / Y G /
1 0 k
C 8 4 3
N I
R 1 8 7 3
F B 2 _ S L
1 k
F B 1 _ S L
F B 1 _ C
R 1 9 7 3
F B 2 _ C
1 k
R 9 2 5
R 9 3 1
1 0 k
1 0 0 k
C 9 2 1
C 9 3 3
C 9 1 5
Q 9 0 1
K T A 1 5 0 4 / Y G /
R 9 2 3
R 9 4 3
R 9 4 1
P W M _ C
1 / 5 0
1 M
8 2 0
- 2 . 5 V
4 7 0
- 3 0 . 5 V
- 2 . 2 V
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
-
-
+
-
+
8
7
-
+
+
L i m i t e r
Low V &
Termal
Warning
R e g u l a t o r
L i m i t e r
1
2
I C 9 0 2
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
C 9 2 2
R 9 2 4
R 9 3 2
1 M
1 0 0 k
- 2 . 2 V
C 9 1 6
- 3 0 . 5 V
R 9 4 2
R 9 4 4
- 2 . 5 V
P W M _ S B
0 . 0 0 1 8 / 5 0
8 2 0
4 7 0
Q 9 0 2
R 9 2 6
K T A 1 5 0 4 / Y G /
1 0 k
C 9 4 3
R 1 9 7 4
N I
F B 2 _ S B
1 k
F B 1 _ S B
6
5
3
4
D 7 9 1
1 . 7 V
U D Z S 1 6 B
0 V
0 V
Q 7 9 3
0 V
1 5 . 1 V
Q 7 9 4
0 V
K R C 1 0 2 S
K T C 3 8 7 5 / Y G /
Q G B 1 2 2 4 J 1 - 0 9
C N 7 8 1
C N 7 7 1
Q G B 1 2 2 4 K 1 - 0 9
C 7 8 1
0 . 1 / 1 6
C 7 8 8
C 7 8 0
1 0 0 / 1 0
C 7 8 7
1 0 0 / 1 0
1 4
1 3
1 2
1 1
1 0
9
8
1
2
3
4
5
6
7
R 7 7 1
R 7 7 3
1 M
1 M
X 7 7 1
X 7 7 2
Q A X 0 7 3 4 - 0 0 1
Q A X 0 7 3 5 - 0 0 1
M a s t e r C l o c k 4 0 0 k H z & 4 2 0 k H z
C 7 8 4
1 0 0 p / 5 0
6
5
D 7 7 1
R 7 8 7
1 S S 1 3 3
2 . 2 k
C 7 8 3
3
4
1 0 0 p / 5 0
D 7 7 2
R 7 8 8
1 S S 1 3 3
2 . 2 k
F B 1 _ L
F B 1 _ L
F B 2 _ L
F B 2 _ L
P W M _ L
P W M _ L
P W M _ R
P W M _ R
F B 2 _ R
F B 2 _ R
F B 1 _ R
F B 1 _ R
F B 1 _ S L
F B 1 _ S L
F B 2 _ S L
F B 2 _ S L
P W M _ S L
P W M _ S L
P W M _ S R
P W M _ S R
F B 2 _ S R
F B 2 _ S R
F B 1 _ S R
F B 1 _ S R
F B 1 _ C
F B 1 _ C
F B 2 _ C
F B 2 _ C
P W M _ C
P W M _ C
P W M _ S B
P W M _ S B
F B 2 _ S B
F B 2 _ S B
F B 1 _ S B
F B 1 _ S B
P R O T E C T
C L K _ F _ C O N T
A M P _ C L K
P . G N D
A M P + B
P W M D u t y & P r o t e c t
1 / 4 W
R 7 9 8
+ 7 V
4 . 7
R 7 9 9
- 7 V
4 . 7
1 / 4 W
Q 7 9 2
N I
Q 7 9 1
N I
LVA10564-7
0 . 1 / 1 6
1 4
1 3
1 2
1 1
1 0
9
8
1
2
3
4
5
6
7
I C 7 0 6
S N 7 4 H C 7 4 A N S
G N D
S
D
Q
C L K
R
Q
S
D
Q
R 7 8 9
1 k
C L K
R
Q
R 7 8 6
V c c
2 . 2 k
SHEET 2
2-3

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