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SCHEMATIC DIAGRAM-4
MD SERVO CIRCUIT
A
R107
1K
MD PLAY
3.3V
0V
0.5
s. 1V/DIV.
AK93C45BH-L
<0V>
1
R82
22K
<0V>
2
<0V>
3
<0V>
4
R81
22K
O
Q
R S T
: +B SIGNAL LINE
R21
22K
L
J
K
M
R108
R147
1K
1K
<0.8V>
<1.6V>
<1.7V>
<1.7V>
<3.3V>
12
11
10
9
8
MD PLAY
MD PLAY
3.3V
3.3V
P-P
0V
T=23
s.
T=0.36
s.
13
14
15
16
17
<3.3V>
<3.3V>
C103
4.7
R
L3
100
H
C85
4V10
IC12
EE PROM
<3.3V>
CS
VCC
8
C124
0.1
CLK
NC
7
DI
NC
6
DO
GND
5
U
P
: MD RECORD SIGNAL LINE
R66
470
C88
C92
560P
560P
C96
R61
R62
2.2
22K
22K
C89
560P
<3.3V>
<1.5V>
<1.5V>
<1.5V>
<1.5V>
7
6
5
4
3
2
IC4
MD PLAY
0.6V
AK4518VF-E2
P-P
AD/DA CONVERTER
F=16.9344MHz
18
19
20
21
22
23
<1.5V>
C97
4.7
R76
10
3.3V
K
J
I
H
13
12
11
10
9
IC72
C3ABKB000041
4M DRAM
14
15
16
17
18
L
M
N
O
P
N
R65
470
O
C93
560P
<3.3V>
<3.3V>
1
24
<3.3V>
<3.3V>
C101
4.7
P
Q
C
A
E
D
5
4
3
2
1
22
23
24
25
26
B
F
G
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