Schematic Diagram-1; Cd Servo Circuit; Optical Pickup - Panasonic SA-AK78 Service Manual

SCHEMATIC DIAGRAM-1

OPTICAL PICKUP

CIRCUIT
LASER DIODE
6
8
11
12
4
9
10
5
2
3
1 2 3
4
8 7 6 5
TRACKING
COIL
FOCUS
COIL
IC703
AN8739SBE2
FOCUS COIL/
TRACKING COIL/
TRAVERSE MOTOR/
SPINDLE MOTOR DRIVE
15 16 17 18 19 20
C735
0.1
C734
10V220
14 13 12 11 10 9
C737
0.1
36
M
M702
TRV MOTOR
38
C736
0.1
M
M701
SP MOTOR

CD SERVO CIRCUIT

C701
6.3V33
R701
4.7
Q701
2.7V
3.2V
((2.3V))
CN701
VCC
0.9V
1 1
PDF ((2V))
2
2
PDE
3 3
LD
4
4
LD GND
5
5
GND
6
6
NB
C713
7
7
GND
0.1
(GUARD)
8
8
NA
9
9
VREF
10 10
LPD
11
11 GND
(GUARD)
12 12
T-
13 13
T+
14
14
C750
F-
0.1
15
15
F+
16 16
C751
0.1
21 22 23 24 25 26 27 28
IC703
8 7 6 5 4 3 2 1
C715
2700P
R735 R725
35
100
390
R715
R724
R727
1K
15K
3.9K
37
: + B Line
: CD Signal Line
PLAY
0.6V J 701
P-P
RF
0.5us. 0.2V/DIV
6.3V100
Q701
29
2SA1037AKSTX
LASER POWER
DRIVE
1 2 3 4 5 6 7 8 9 10 11
C714
6.3V100
IC701
IC701 28 27 26 25 24 23 22 21 20 19 18 17 16
AN8839NSBE1
SERVO AMP
PLAY
0.1V
C710
C747
P-P
120P
180P
2ms 0.1V/DIV
R744
C712
120K
0.1
C749
C711
2200P
0.1
C742
0.027
R708
22K
R707 R706 R704
1K
1K
39K
C739
C738
C752
1500P
1500P 0.01
R729 R728
3.9K 3.9K
R749
4.7K
R723 R731
6.8K 6.8K
27
C703
C704
0.1
12 13 14
15
0V
((3.2V))
42
PLAY
0.6V
P-P
2ms 0.1V/DIV
33
SA-AK78