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14.3. SERVO BLOCK DIAGRAM
OPTICAL PICKUP UNIT
PHOTO DETECTOR
B1
B2
A1
A2
HEAD
A4
A3
B4
B3
AMP
Q8551, Q8552
LASER DIODE(DVD)
LD DRIVE
Q8561, Q8562
LASER DIODE(CD)
LD DRIVE
IC8001
IC8251
(DV3.2)
(MOTOR DRIVE)
VIN9
130
VIN10
TRSDRV
VIN2
129
DRV0
91
6
VIN5
131
VIN6
TRDRV
VIN4
132
PWM1
22
144
VIN7
133
VIN8
FODRV
VIN5
134
PWM0
23
145
VIN1
138
VIN2
SPDRV
VIN1
137
DRV1
90
5
VIN3
135
VIN4
AD1
OPOUT
136
27
AD1
140
LPC01
124
VIN3
FROM
7
LPC1
123
IC6001-16,17PIN
LPC02
126
LPC2
125
SP MUTE
CH1
DRV4
87
3
MUTE
RFINN
113
TRVFT MUTE
CH2,4,5
DRV3
88
4
RFINP
MUTE
114
RF SIGNAL
MOTOR DRIVE SIGNAL
LEVEL
SHIFT
-
+
BIAS1
LEVEL
SHIFT
-
+
+
-
LEVEL
SHIFT
-
+
BIAS2
LEVEL
SHIFT
-
+
LEVEL
SHIFT
-
+
CH3
MUTE
41
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 PICKUP 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)
TRAY MUTE
MUTE3
1
18
CLOSE SW
TRAY CLOSE
20
S2601
OPEN SW
TRAY OPEN
19
S2602
DVD-S42PC/S422PC
SERVO BLOCK DIAGRAM
DVD-S42PC / DVD-S422PC
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