A) Cd Servo Circuit - Panasonic SA-VK31GC Service Manual

18.1. (A) CD Servo Circuit

OPTICAL PICKUP CIRCUIT
E GND
Vref F
A Vcc
NC B
C3
0.22
LPD LD
GND LDG
VR1
TRACKING
COIL
FOCUS
COIL
C7335
0.1
C7334
10V220
SCHEMATIC DIAGRAM - 1
CD SERVO CIRCUIT
R7601
4.7
Q7601
VCC
1 1
2 F 2
R7650
C1
E
3 3
5.6
0.47
W7035
LD
4 4
5 5
LD GND
GND
6 6
C7613
B
7 7
0.1
GND
8 8
(GUARD)
9 A 9
10 10
VREF
W7023
11 LPD 11
GND
12 12
(GUARD)
13 T- 13
14 14
T+
15 F- 15
16 16
F+
CN7001
14 15 16 17 18 19 20
IC7003
13 12 11 10 9 8 7
IC7003
AN8739SBTE2
FOCUS COIL/
TRACKING COIL/
TRAVERSE MOTOR/
SPINDLE MOTOR DRIVE
36 35
M
38 37
M
W7033 W7031 W7030
0 0 0
W7034 W7032
0 0
Q7601
W7036
B1ADCF000001
0
LASER POWER DRIVE
W7046
0
0
C7614
6.3V100
0
1 2 3 4 5
32 31 30 29 28
C7112
2700P
C7111
2700P
39
28
R7107
150K
40
21 22 23 24 25 26
6 5 4 3 2 1
R7335 R7325
100 390
C7315
0.039
53
: CD-DA SIGNAL LINE
: +B SIGNAL LINE
C7103
6.3V100
C7104
0.1
30
R7152
R7151
15K
4.7K
6 7 8 9 10 11 12 13 14
IC7001
AN22004A-NF
SERVO AMP
27 26 25 24 23 22 21 20 19
C7110
C7147
560P
470P
R7144
39K
W7015
C7149
0
2200P
C7142
0.047
41 34 31
R7108 R7106 R7104
150K
1K 1K
42 33 32
R7336
10
C7352 C7338 C7339
8200P 3300P 0.01
R7329 R7328
3.9K 3.9K
R7327 R7349
3.9K 4.7K
R7323 R7331
6.8K 6.8K
SA-VK31GC / SA-VK31GS
15 16
18 17