Sharp MD-M3 Service Manual page 38

MD-M3/M1
A
CD LID
SW1
7
7
K
6
6
E
5 5
B
4
4
A
3 3
F
2 2
C
1 1
B
CNS2 BI2
C
PICKUP UNIT(307)
LT0H41M1
7
K
K
6
E E
5
B B
4
A A
3
F F
2
C C
1
LD
MON
D
T–
TR+ 1
T+
2
FO+ F+
3
F–
FO– 4
GND
5
TR– PD
6
VR
ACTUATOR
7
LD
8
E
TR–
TR+
FO+
FO–
F
GND
PD
VR
LD
CNS1
+
M1
M
SPINDLE
–
6
+
M2
M
5
SLED
–
4
G
3
2
SW2
PICKUP-IN
1
CNS3
CD MOTOR PWB-F
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.
1
R51 68K
R52 68K
R53 68K
R54
68K
C54
R55
47/10
68K
R56
68K
C55
0.01
R50
330
D60
DS1SS133
R60
100
+B
5.05V
3.99V
Q52
KTC3199 GR
3.37V
R58
C51
3.3
47/6.3
3.37V
2.73V
Q51
KTA1266 GR
1.49V
C53
0.001
C52
0.01
CORE1
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
BI1
SP+
6 6
SP–
5 5
SL+
4 4
SL–
3 3
PU-IN
2 2
1 1
BI3
MAIN PWB-A(3/3)
2 3
Figure 38 SCHEMATIC DIAGRAM (6/14)
C5
100/10
IC1
LA9235M
SERVO AMP.
FIN1 1.64V 3.27V
1
30
ODRV
FIN2 1.64V 1.65V
2 29
TIN1 1.66V 1.65V
3
28
TIN2 0.85V
1/66V
4
PH 27
C7
0V
26
10/35
REFI 1.65V 0V
5 25
BH
C8 VREF 1.65V 1.48V
6
24
0.1
LDS 0V 0V
ODRV
7 23
LDD
2.73V 1.62V
PH/BH
8 22
GND 0V
1.65V
9 21
LPF
LDOF 0V
1.66V
10 20
ODRV 0V
1.65V
11
19
LPF
AGON 0V
1.64V
12 18
EFBL 1.81V
0V
13 17
TESO 1.66V
0V
14
LPF 16
TESI
1.65V
15
+B
24 23 22 21 20 19 18 16 15 14 13
17
IC3
LA6548
FOCUS/TRACKING/
SPIN/SLED DRIVER
1 2 3 4 5 6 7 8 9 10 11 12
4
– 38 –
C11
100/10
C18
1P
C16 6P
C12
0.1
VCC
R5
RFSW 39K
RF–
R6 C17 R8
27K 0.0027 330
RF
C13
C42
NC
0.01
68P
PH
5
BH
NC
C14
0.33
RFEV
FE– R3
100K
FE
TE– R4
10K
TE
HFL
TES
4
R43
220K
13
+B
R59
100K
CD SIGNAL
5
R12
C23
0.047 680
8
R79
1.5M
C24 R13
2.2/50
680
C26
0.047
R80
1M
C22
100P
R15
10K
C
0
1
R36
15K
R35
R38
R39
R40
MD SIGNAL
6