Schematic Diagram/Wiring Side Of P.w.board - Sharp MD-R3H Service Manual

MD-R3H
VCC
A
1/2VCC
–
+
–
+
–
+
–
+
–
+
LD
MON
B
LD GND
LTOH41M
HOE-LD-PD
ACTUATOR
FO–
FO+
TR+
TR–
C
PICKUP UNIT
IC750
21 2.3V
PIN
VOLTAGE
NO.
22 2.3V(2.6V)
1 2.3V 23 2.3V(2.4V)
2 2.3V 24 0V
2.3V 25
3 2.3V
4 2.3V 26 2.3V
5 2.3V 27 0V(5V)
6 5V(3.2V) 28 5V(5V)
7 0V(0.2V) 29 0V(5V)
D
8 2.3V 30 5V(5V)
9 2.3V 31 5V(130mA)
10 2.3V 32 5V(5V)
11 2.3V 33 5V(4.7V)
12 2.3V 34 2.3V
13 2.3V 35 0.7V
14 2.3V 36 5V
15 2.3V 37 1.7V(2.8V)
16 2.3V 38 1.7V(3.5V)
17 2.3V 39 5V(0V)
18 2.3V 40 2.3V
19 2.3V 41 2.4V(3.5V)
20 2.3V 42 2.3V
( ):PLAYBACK
:STOP
E
F
M702
M
SPINDLE
MOTOR
M701
M
SLED
MOTOR
SW702
PU-IN
G
CD MOTOR PWB-G
H
The numbers 1 to
1
E
7 7
A
6 6
B
5 5
4 4
F
3 3
2 2
C
1 1
VR1A
(1K)
LD
8 8
VR
7 7
MON
6 6
GND
5 5
F–
4 4
F+
3 3
T+
2 2
T–
1 1
IC700
PIN
VOLTAGE
NO.
1
3.5V(3.1V)
2
3.5V(3.9V)
3
2.3V(2.6V)
4
2.3V
5
0V
6 1.6V
7 5V(0V)
TP751
8
0V
9
2.3V
10
2.3V
11
3.5V
12
3.5V
13 0V
14
2.3V(2.2V)
15
2V(2.2V)
16
2V(2.2V)
17
3.5V(3.8V)
18
3.5V(3.2V)
19
2.3V(2.2V)
20 2.3V
21 7.5V
22
7.5V
23
2.3V
24
2.3V
25
2.3V
26
3.5V
27 3.5V
28 0V
( ):PLAYBACK
:STOP
+
–
6 6 6
+
5 5 5
–
4 4 4
3 3 3
2 2 2
1 1 1
10 are waveform numbers shown in page 59.
2
Figure 40 SCHEMATIC DIAGRAM (1/10)
Q751
2SA1015 GR
+B
C750
0.1
VCC
7 7
1/2VCC
6 6
E
5 5
A
4 4
B
3 3
F
2 2
C
1 1
CNP752
LD
+B
8 8
R754
VR
7 7 47
PD
6 6
GND
5 5
FO–
4 4
FO+
3 3
TR+
2 2
TR–
1 1
CNP751
TRACKING
OFFSET
1
TG2
2
HF
3
FOCUS
TG1
4
OFFSET
FG2
5
1/2Vcc
6
C756
0.0082
Q701
KRA103 S
F–
F+
SL+
SL–
SP+
6
SP–
5
SL+
4
SL–
3
PU–IN
2
GND
1
CNP700A
3 4
– 40 –
R753
18
C751
4.7/25
R793 120K
R792 120K
R790 120K
R794
68K
R795
68K
C752
C753
120P
120P
(CH)
(CH)
TRACKING ERROR
BALANCE
R757
1K
R761
1K
TRACKING
R762
GAIN
R765
15K
VR752
10K
M0999
R764
10K
47K
R763
270K
C757 R766
220
0.15
R769 R770
27K 27K
VR754
47K
C759
R771 R772
10/16
27K 82K
VR753
47K
C760
0.1
R773
R774
5.6K
47K
R775
C761
1K
0.022
R776
R778
R777
22K
220K
33K
C762
0.1
IC700
BA5914FP
FOCUS/TRACKING/SPIN
/SLIDE DRIVER
1
28
T–
27
2
T+
3
26
25
4
5
24
1/2Vcc
6
23
7
22
8
21
9
20
10 19
SPIN –
11 18
SPIN +
17
12
16
13
14 15
5
IC750
M62472FP
SERVO CONTRO
A+C
48K
10K
1
–
+ –
+
R791 I/V AMP.
10K
B+D
48K
120K HF AMP.
2
–
+
R755
E
60K HFOK
22K
3
10K
–
R756
+
F
22K
4 + –
7.7K
R750
180K EF BAL
50K
72K
72K
5 330K
FE AMP.
VR751
APC OUT
180K + –
MR
6 5P
100K
APC IN
TE1 AMP.
7
APC
Current
FE OUT
Reference
8
FS+
FZC
33K
9
1K 47K
C755
–
0.0033
TC IN
+
10
TC Det
TE
11
Focus
Search
TE+ TE2 AMP.
12 I/F
+
R767
–
2.2K TE–
13
C758 82K
TE OUT
0.33
14
22K
TG
15
R768 22K
TS–
39K
16
RESET
–+
10µA
1
TS OUT TS AMP.
17
1
SS FIL 22K +
–
18
SS–
19
FSR
–+
20µA
SS OUT
SS AMP.
10K
20
+
FS–
–
21
FS AM
C701
100/10
C702
0.1
R701
10K
R811
10K
6