Sharp MD-DR470HS Service Manual page 30

MD-DR470H/MD-DR480H
MAIN PWB-A
A
B
C
+B
+2.5V
D
E
TP238
F
G
+B
+B +B
VCC4_5
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 38.
1
+B
ROUTX
ROUT
LOUTX
LOUT
TP751
2 3
Figure 30 SCHEMATIC DIAGRAM (5/8)
+B
PCNT1
4 3
2
TP771
5 1
C774 C773
1 0.22
IC771
6209B23M
2.3V REGULATOR
LOGIC
IC751
74LCX00M
8 GND 7
9 6
10 5
14
11 4
12 3
13 2
+B
14 VCC 1
C750
1
R
Q752
MCH6630
6
1
S1 D1
G2
G1
2 5
D2 S2
3 4
CK5
Q751
MCH6630
1 6
D1
S1
G1 G2
2 5
4
– 30 –
C509
1
C510
1
+B
C500
1
C503
3.3/10
8 7 6 5 4 3 2 1
18 19 20
9 10 11 12 13 14 15 16
21
D751
MA132WK
R752
1M
74LCX86T
C752
8
0.47
9
R754 10
1M
11
C751
12
0.47
13
14 VCC
R753
1M
C760
1
+B
+B
+B
Q762
MCH6630
1
S1
G1
2
D2
3
C768
10
Q761
MCH6630
17
1
S1
G1
2
5
IC701
R719
5.6K
IR3R61U6
C734
0.47
AUDIO
INPUT
AMP.
10
MCINL
11
+B MOUTL
12
BIAS
13
MINL
14
MGND
15
16
R703
100K
+B
LOGIC
IC761
GND 7
6
5
4
3
2
1
L7
22
L
22
6
D1
G2
5
S2
4
L
2
6
D1
L
G2
5
22
6