Sharp CD-EA235V Service Manual page 20

CD-EA235V
A
PICKUP UNIT
VCC
VREF
E
A
B
B
F
C
C
TR–
TR+
TR+
FO+
FO+
FO–
PD
TR–
VR
LD
GND
D
+
M1
M
SPINDLE SPIN
MOTOR –
+
M2
M
SLED SLIDE
MOTOR
–
SW4
PU-IN
PICKUP IN
E
CD MOTOR PWB-D
F
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 34.
1
VIDEO CD PWB-C (1/2)
VCC
+B
7 7 7
7
VREF
6 6 6 6
E
5 5 5 5
A
4 4 4 4
B
3 3 3 3
F
2 2 2 2
C
1 1 1 1
TR–
1 1 1 1
TR+
2 2 2 2
FO+
3 3 3 3
FO–
4 4 4 4
GND
5 5 5 5
PD
6 6 6 6
VR
C38
7 7 7 7
0.01
LD
8 8 8 8
SP+
6 6 6 6
SP–
5 5 5 5
SL+
4 4 4 4
SL–
3 3 3 3
PUIN
2 2 2 2
GND
1 1 1 1
2
Figure 20 SCHEMATIC DIAGRAM (9/13)
CD SIGNAL
+B
C3
R9
47/25
10
C4
0.0033
+B
+B
15 16 17 18 19 20 21 29
14 13 12 11 10 9
+B
C20
0.01
3 4
– 20 –
R7
47
+B
C5
0.047
C8
R12
0.0033
330
C6 0.01
RF
1
LPF
2
AIN
3
CIN
4
BIN
5 DIN
6
AVSS1
+B
7
AVDD1
TP2
C21
8 FEC
0.056
9
RFMON
C9
10 VREF
330/6.3
C12
11 JITTC
100P
12 EIN
13 FIN
14 TEC
C11
15
TE
C46
0.22/50
0.01
16 TEIN
17 AVSS2
+B
AVDD2
18
LDD
19
LDS
20
FDO
2
+B
+B
1
CONSTANT
VOLTAGE
Q2
KTA1271 Y
+B
+B
+B
22 23 24 25 26 27 28
8 30 7 6 5 4 3 2
+B
5
C34 100P
C33 0.022
C32 100P
C55 100P
C30 100P
C54
100P
C28 100P
+B
C27
0.022
80 79 78 77 76 75 74 73 72 71 70 69 68 67
5
8 7 3
IC1
LC78637E
CD SERVO
4
6
21 22 23 24 25 26 27 28 29 30 31 32 33 34
+B
R44
15K
R20
3.3K
1
+B
R50
1
+B
R49
1
+B
6