Servo Block Diagram - Panasonic DVD-S49PC Service Manual

14.3. SERVO BLOCK DIAGRAM

OPTICAL PICK UP UNIT
PHOTO DETECTOR
B1 B2
A1 A2
A4 A3 HEAD
AMP
B4 B3
LASER DIODE(DVD)
Q8551, Q8552
LD DRIVE
LASER DIODE(CD)
Q8561, Q8562
LD DRIVE
IC8251
IC8001 (DV3.2) (MOTOR DRIVE)
VIN9
130
VIN10
129 TRSDRV VIN2
91 6
VIN5
131
BIAS1
VIN6
132 TRDRV VIN4
22
144
VIN7
133
VIN8
134 FODRV VIN5
145 23
VIN1
138
VIN2
137 SPDRV VIN1
90 5
VIN3
135
VIN4
136 AD1 OPOUT
140 27
LPC01
124
VIN3
FROM
7
LPC1 IC6001-16,17PIN
123
LPC02
126
LPC2
125
SP MUTE
CH1
87 3
MUTE
RFINN
113
TRVFT MUTE CH2,4,5
88 4
RFINP MUTE
114
RF SIGNAL MOTOR DRIVE SIGNAL
LEVEL
SHIFT
-
+
LEVEL
SHIFT
-
+
+
-
LEVEL
SHIFT
-
+
BIAS2
LEVEL
SHIFT
-
+
LEVEL
SHIFT
-
+
CH3
MUTE
39
TRACKING ERROR SIGNAL FOCUS ERROR SIGNAL
VO2+
12
-
+
TRAVERS MOTOR
VO2-
11
-
+
OPIN+
25
VO1+
14
-
+
SPINDLE MOTOR
VO1-
13
-
+
OPIN-
26
VO3+
10
-
+
M2601
LOADING MOTOR
VO3-
9
-
+
OPTICAL PICK UP UNIT
IC8251-15,16,17,18
4Vp-p(0.5msec./div.)
ACTUATOR
TRACKING
-
COIL
VO4+ ACT T+
+
17
VO4- ACT T-
18
-
FOCUS
+
COIL
VO5+ ACT F+
15
VO5- ACT F-
- 16
+
-
+
IC6001
(OPERATION CPU)
MUTE3 TRAY MUTE
1 18
CLOSE SW
TRAY CLOSE
25
S2601
OPEN SW
TRAY OPEN
24
S2602
DVD-S49PC
SERVO BLOCK DIAGRAM
DVD-S49PC