Schematic Diagram; Cd Servo Circuit - Panasonic MD0004056C2 Service Manual

SCHEMATIC DIAGRAM-1

NOTE:
The number which noted at the connectors on the schematic diagram as
"SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serial number located on the left corner in the schematic diagram.
OPTICAL PICKUP
8
3
LD
11
12
2
10
5
4
9
6
1 2 3 4
8 7 6 5
TRACKING
COIL
FOCUS
COIL
TP36
A
M702
M
SPINDLE
MOTOR
B
TP35
TP38
C
M701
M
TRAVERSE
MOTOR
D
TP37
A

CD SERVO CIRCUIT

Q701
(3V)
2SA1037AKSTX
3.2V
LASER POWER
Vcc CN701
1 1 DRIVE
1.1V
PDF
A (2V)
2 2
PDE
B D
3 3
E
LD
4 4
C
A
GND
5 5
B
GND
6 6
NB
7 7
C
GND
8 8
D
NA
E
9 9
VREF
10 10
LPD
11 11
GND C712
12 12
0.1
T+
13 13
C711
0.1
T-
14 14
F+
15 15
C751 C750
0.1 0.1
F-
16 16
TP42
D C B A
VREF
B A D C
(0.4V) (0.6V)
0V 0V 0V 0V 0V
14 15 16 17 18 19
13 12 11 10 9 8
0V 0V 0V 0V
(0.1V) (0.7V) (0.7V)
A B D C
:POSITIVE VOLTAGE LINE
PLAY
0.8V
P-P
(2.3V)
0.5 *s. 0.2V/DIV.
2.7V
IC701
AN8839NSBE2
SERVO AMP
(0.2V) (2.3V)
1.6V 1.6V 3.3V 1.6V 1.6V 0V 2.7V
1 2 3 4 5 6 7
28 27 26 25 24 23 22
1.6V 1.6V 1.6V 1.6V 1.6V 1.6V 1.6V
C747 C710
180P 120P
R744
120K
C749
2ms. 0.1V/DIV.
2200P
TP40 TP33
I H G F
PLAY
0.1V
P-P
2ms. 0.1V/DIV.
IC703
AN8739SBE2
FOCUS COIL/
TRACKING COIL/
TRAVERSE MOTOR/
SPINDLE MOTOR DRIVE
B A
7.5V 7.5V 1.6V 1.6V
20 21 22 23 24
7 6 5 4 3
7.5V 1.6V 1.6V 3.2V
(0V)
7.4V 7.7V
:CD PLAYBACK SIGNAL LINE
3.3V 5V
3.3V
(RF)
TJ701
TP29
C716
820P
(1.4V) (3.2V)
0.9V 0.7V 1.9V 1.6V 0V 0V
8 9 10 11 12 13 14
21 20 19 18 17 16 15
1.6V 0V 3.2V
(0V)
PLAY
0.3V
P-P
C742
0.027
TP32
E D C
1.6V
25 26
2 1
A
B
1.6V 1.6V
R725 C715
390 2700P
R749 4.7K
R731 6.8K
5V
B
A
A
R728
3.9K
B
C
D
E
F
G