Panasonic SA-PM21PC, Service Manual

Page: 51 / 92

18 Schematic Diagram
18.1. CD Servo Circuit
15
14
13
12
11
10
2
4
6
8
9
7
5
3
1
16
C713
0.1
R754
5.6
Q701
B1ADCF000001
LASER POWER DRIVE
R701
4.7
C701
6.3V33
R729
1K
R728 10K
R749
18K
R727
1K
R725
330
R715
3.3K
C752
0.018
C715
0.47
C739
0.018
C738
0.056
R735
100
R731
22K
R723
3.3K
38
M701
TRV MOTOR
C735
0.1
C734
10V220
M702
SP MOTOR
36
R732
1K
R736
100
D3-
D3+
D4-
D4+
PVCC2 PGND2
NC
GND
NC NC NC
VCC
VREF
IN4 IN3
D2+ D2- D1+ D1- PVCC1 PGND1 NC GND NC NC NC PC1 IN1 PC2 IN2
IC703
BA5948FPE2
IC 4CH DRIVE
CN701
28 27 26
3 2 1
25
4
24
5
23
6
22
7
19
10
18
11
17
12
16
13
15
14
20 21
9
8
VCC
F
E
LD
LD GND
GND
A
GND
B
VREF
LPD
GND
T-
T+
F-
F+
C714
6.3V100
R739
1K
15
14
13
12
11
10
2
4
6
8
9
7
5
3
1
16
C1
0.47
C9 0.22
TRACKING COIL
FOCUS COIL
VCC
F
E
LD
LD GND
GND
A
GND
B
VREF
LPD
GND
T-
T+
F-
F+
HUL7213
E
Vref
A
NC
LPD
GND
GND
F
Vcc
B
LD
LDG
C2 0.22
37 39
R766
5.6K
30
29
M M
VR1
SCHEMATIC DIAGRAM - 1
CD SERVO CIRCUIT
: +B SIGNAL LINE : CD-DA SIGNAL LINE
OPTICAL PICKUP UNIT
48
35
55
52
49
29
82 83 89
87
60
93
94
95
84
90
51
SA-PM21PC