Cd Servo Circuit - Panasonic SA-AK18 Service Manual

SA-AK18
SCHEMATIC DIAGRAM-1
OPTICAL PICKUP
CIRCUIT
LASER DIODE
6
8
11
12
4
9
10
5
2
3
2 3
1 4
8 6 5
7
TRACKING
COIL
FOCUS
COIL
IC703
AN8739SBE2
FOCUS COIL/
TRACKING COIL/
TRAVERSE MOTOR/
SPINDLE MOTOR DRIVE
15 16
C735
0.1
C734
10V220
14
36
38

CD SERVO CIRCUIT

CN701
VCC
1 1
PDF
2 2
PDE
3
3
LD
4
4
LD GND
5 5
GND
6 6
NB
7
7
GND
(GUARD)
8
8
NA
9
9
VREF
10 10
LPD
11
11 GND
(GUARD)
12 12
T-
13
13
T+
14
14
F-
15
15
F+
16 16
17 18 19 20 21 22 23 24 25 26 27 28
IC703
13 12 11 10 9 8 7 6 5 4 3 2 1
C737
0.1
R735
35
100
M
M702
R724
SP MOTOR
18K
C736
0.1
37
M
M701
TRV MOTOR
: + B Line
PLAY
0.6V
C701
P-P
6.3V33
R701
4.7
0.5us. 0.2V/DIV
Q701
2.7V Q701
3.2V
2SA1037AKSTX
((2.3V))
LASER POWER
DRIVE
0.9V
((2V))
C713
0.1
1 2 3 4
C714
6.3V100
C750
0.1
28 27 26 25
C751
0.1
PLAY
0.1V
C747
P-P
180P
2ms 0.1V/DIV
R744
C712
120K
0.1
C749
C711
2200P
0.1
R708
22K
R707
39K
C715
2700P
C738
C752
0.01
1500P
R725
R729
390
3.9K
R715
R727 R749
1K
4.7K
3.9K
R723 R731
6.8K 6.8K
34
: CD Signal Line
J 701
RF
C703
6.3V100
29
C704
0.1
5 6 7 8 9 10 11 12 13 14
IC701
AN8839NSBE2
SERVO AMP
24 23 22 21 20 19 18 17 16 15
0V
((3.2V))
C710
120P
42
PLAY
C742
0.027
0.6V
P-P
2ms 0.1V/DIV
R706 R704
1K
1K
33
C739
1500P
R728
3.9K