Sharp MD-R3H Service Manual page 41

IC750
M62472FP
VO CONTROL
R758
10K 12K
HF–
42
+ –
AMP. 10K
48K
HF AMP. HFO
41
C773
HFI
0.001
K HFOK
42
10K
HFD
39
+ –
C772
HFC 0.033
38
72K
72K
330K
FE AMP.
C771
MRC 0.068
MR 37
5P
Vcc
00K
36
E1 AMP.
R780
47K
Current IREF
35
Reference
C770
10/16
C–FSR
FZC
34
C768
MCK 22/16
47K
33
MLA
32
C780
Det
0.001
MSD
Focus 31
Search
AMP.
I/F
ACLR
30
DOUT
29
2K
JP1
28
22K
APC SW
27
RESET
10µA
C767
AMP. 10K 2.2/50
Vcc/2
26
10K
VREF
22K +
25
–
GND
24
C766 R751 C765
FSR 100K 10/16
0.1
23
20µA
FSR IN
AMP. 10K
R779
12K
+
22
–
FS AMP. C763
FS OUT
10/16
R811
10K
9 8 7 6 5 4 3 2 1
12 11 10
CNS903
P45 8 - H
TO DISPLAY PWB
NOTES ON SCHEMATIC DIAGRAM can be found on page 33.
7
+B
R760
C774
4.7K
9P
(CH)
R759
47K
R781
1.2K
C811
100/10
+B
C769
0.1
D
C
E
L
F
+B
R812
100K
CNP800
8
Figure 41 SCHEMATIC DIAGRAM (2/10)
CD SIGNAL
C817
10P
(CH)
R808 560K
R809 560K
42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
IC800
M65821FP
SERVO/SIGNAL CONTROL
SIGNAL PROCESSOR
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
DIGITAL 5V
C806
0.001
C803
C819
270P
0.01
C808
0.1
IC800
21 0V
PIN
VOLTAGE
NO.
22 2.3V
1 5V 23 2.5V
2 0V 24 5V(0V)
3 0V(5V)
25 2.3V(0V)
4 0V(5V)
26 2.2V
5 0V(0V) 27 2.5V
6 0V(5V) 28 2.5V
7 5V 29 0V(2.5V)
8 5V(0.2V) 30 2.5V
9 5V 31 5V
10 5V
32 2.3V
11 5V 33 2.5V
+B
12 0.8V(4.3V) 34 2.5V
13 0.8V(4.3V) 35 2.5V
14 0V 36 2.5V
15 5V 37 0V(2.3V)
16
1.2V 38 0V(1.6V)
17 5V(0V) 39 0V(0.1V)
18 0.2V(2.3V) 40 2.5V
19 0.1V(2.8V) 41 0V
20 0.1V(2.8V) 42 0V
( ):PLAYBACK
:STOP
9 10
– 41 –
CD 5V
CD GND
R883
X801
330
8.46MHz
C823
10P
(CH)
C822
10P
(CH)
DIGITALOUT
R805
33K
R803
3.3M
R804
2.2K
C807
0.022
C805
C809
0.56
47/10
CD SERVO PWB-C
11
MD-R3H
CNS502
1 1
P47 8 - H
2 2
CNP502
3 3
TO MAIN PWB
+B
4 4
P46 3 - H
1
CNS801
2
TO MAIN PWB
+B
12