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14.3. SERVO BLOCK DIAGRAM
OPTICAL PICK UP UNIT
PHOTO DETECTOR
B1
B2
A1
A2
HEAD
A4
A3
AMP
B4
B3
LASER DIODE
DVDLD+
LASER DIODE
CDLD+
IC2651
(SPINDLE MOTOR DRIVE)
SPINDLE MOTOR UNIT
A3
2
DRIVER
A2
4
GAIN
CONTROL
A1
7
CURRENT
SENSE AMP
+
-
HALL AMP
H1+
9
+
-
HALL1
TL
+
H1-
-
10
H2+
11
+
-
HALL2
+
H2-
R
-
12
D
Q
CK
Q
H3+
13
+
-
HALL3
+
H3-
-
14
TRAVERSE SW
IC3004
(DV3.2)
VIN5
131
VIN6
132
VIN7
133
VIN8
134
VIN1
138
VIN2
TRDRV
137
PWM1
144
VIN3
135
VIN4
136
FODRV
PWM0
145
VREFH
127
Q5201,Q5211
LPCO1
124
LD DRIVE
TRVDRV
DRV0
91
LPC1
123
Q5202,Q5215
LPCO2
LD DRIVE
126
LPC2
125
RFINN
113
RFINP
114
RNF
28
M+5.5V
ACTMUT-L
DRV3
88
IC2651-24
3.4Vp-p(5msec./div.)
TSD
PS
SS
PS
23
87
DRV4
TORQUE
SENS AMP
EC
SPDRV
+
22
90
DRV1
-
VCC
ECR
VHALF
21
128
FG
HFG
24
85
FG
TRV-SW+
89
DRV2
RF SIGNAL
MOTOR DRIVE SIGNAL
IC2601
(TRAVERSE MOTOR DRIVE)
VIN1
2
VIN2
3
LEVEL
SHIFT
VIN3
23
-
+
LEVEL
CH3
27
SHIFT
MUTE
-
+
BIAS1
CH1,2
9
MUTE
LEVEL
SHIFT
-
+
47
DVD-LS91EE / DVD-LS91GN / DVD-LS91GCS
TRACKING ERROR SIGNAL
FOCUS ERROR SIGNAL
VO3+
DC1
17
-
+
TRAVERSE MOTOR
VO3-
DC2
18
-
+
OPTICAL PICK UP UNIT
IC2601-11,12,13,14
0.4Vp-p(0.5usec./div.)
ACTUATOR
TRACKING
COIL
-
VO1+
TR+
+
14
VO1-
TR-
13
-
FOCUS
+
COIL
VO2+
FO+
12
VO2-
FO-
11
-
+
-
+
DVD-LS91EE/GN/GCS
SERVO BLOCK DIAGRAM
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