Sharp R-990KS Service Manual page 37

[4] Printed Wiring Board (Figure S-3)
Figure S-3. Printed Wiring Board
R R
1
,F
B
1
2
R 91
R 80
R 92
R 81
R 93
R 73
R 72
R 71
R 70
D70
D71
D72
D73
C 7
D74
D75
D76
D77
R 79
R 78
R 77
R 76
R 75
R 74
8
10
11
12
(J 7) C 30
(J 5)
C 50
(J 3)
C 60
13
(J 2)
(J 4)
(J 6)
16
17
C ONV
18
HE A T E R C OM
R E D B R N
D25
C 21
19
R Y 3 D24
E
B Q25
E
B
Q24
D23
R Y 2
R 3
R Y 1
22
C 22
B
Q21
E
23
R Y 5
24
B
Q20
E
R Y 4
R Y 6
0
12 – 5
32
E
Q90
3
C 10
(C 81)
R 86(J 8)
(C 80)
(R 45)
(C 45)
3 1
(C N - D)
4
6
ZD3
ZD4
C 9
R 64 (R 47)
(R 48)
9
(R 49)
C 5
(C 46)
C 6
(C 47)
14
15
E
B Q40
C 3
D31
D30
C 4
21
C 2
C 1
C 11
R 10
R 11
R990K(W)