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13.3. 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
(DV2)
(MOTOR DRIVE)
VIN9
130
VIN10
129
TRSDRV
VIN2
75
6
VIN5
134
BIAS1
VIN6
133
TRDRV
VIN4
147
22
VIN7
132
VIN8
131
FODRV
VIN5
148
23
VIN1
138
VIN2
137
SPDRV
VIN1
76
5
VIN3
136
VIN4
135
AD1
OPOUT
140
27
LPC01
124
VIN3
FROM
7
IC6001-16,17PIN
LPC1
123
LPC02
126
LPC2
125
MUTE1
CH1
79
3
MUTE
RFINN
110
MUTE2
CH2,4,5
83
4
RFINP
MUTE
111
RF SIGNAL
MOTOR DRIVE SIGNAL
LEVEL
SHIFT
-
+
LEVEL
SHIFT
-
+
+
-
LEVEL
SHIFT
-
+
BIAS2
LEVEL
SHIFT
-
+
LEVEL
SHIFT
-
+
37
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
-
VO4+
ACT T+
+
17
VO4-
ACT T-
18
-
+
VO5+
ACT F+
15
VO5-
ACT F-
-
16
+
-
+
IC6001
(OPERATION CPU)
CH3
MUTE3
TRAY MUTE
1
18
MUTE
CLOSE SW
TRAY CLOSE
25
S2601
OPEN SW
TRAY OPEN
24
S2602
DVD-K29GCS
SERVO BLOCK DIAGRAM
DVD-K29GCS
TRACKING
COIL
FOCUS
COIL
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