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18 Block Diagram
OPTICAL PICK UP UNIT
PHOTO DETECTOR
B1
B2
A1
A2
HEAD
AMP
A4
A3
B4
B3
LASER DIODE
Q8551,8552
LD DRIVE
LASER DIODE
Q8561,8562
LD DRIVE
IC8271
C0GBF0000004
SPINDLE MOTOR DRIVE
SPINDLE MOTOR UNIT
2
A3
DRIVER
4
A2
GAIN
7
A1
CONTROL
HALL AMP
CURRENT
SENSE AMP
9
H1+
+
-
+
-
TL
HALL1
+
10
H1-
-
11
H2+
R
+
D
-
TSD
HALL2
Q
+
12
H2-
CK
-
Q
VCC
13
H3+
+
-
HALL3
+
14
H3-
-
TRAVERSE SW
IC8001
MN2DS0003APH
DV2
138
VIN1
137
VIN2
136
VIN3
135
VIN4
131
VIN8
132
VIN7
133
VIN6
134
VIN5
PWM1
129
VIN10
130
VIN9
PWM0
124
LPC01
DRV0
123
LPC1
126
LPC02
125
LPC2
110
RFINN
111
RFINP
DRV8
PS
23
MUTE3
79
TL
DRV4
EC
22
SP DRV
76
DRV1
P8
ECR
21
128
VHALF
P9
FG
24
72
FG1
SW
81
DRV6
IC8251
C0GBG0000044
TRACKING COIL/FOCUS COIL/TRAVERSE MOTOR DRIVE
-
1
BIAS1
+
147
TRV DRV
2
VIN1
148
F0 DRV
3
VIN2
75
TRS DRV
23
VIN3
24
LDIN
-
+
BIAS2
27
MUTE3
CH3
MUTE
83
MUTE12
9
MUTE12
CH1,2
MUTE
IC8611
C3EBGC000055
EE PROM
60
SDA
5
SDA
59
SCL
6
SCL
(Not Supplied)
55
VOL4+
-
+
LEVEL
VOL4-
SHIFT
-
+
VOL3+
17
-
TRAVERSE
+
MOTOR
VOL3-
18
LEVEL
SHIFT
-
+
OPTICAL PICK UP UNIT
VOL1+
14
ACTUATOR
-
+
ACT T+
VOL1-
13
ACT T-
LEVEL
SHIFT
-
-
+
+
ACT F+
ACT F-
VOL2+
12
-
+
LEVEL
VOL2-
11
SHIFT
-
-
+
+
SA-HT670PC
TRACKING
COIL
FOCUS
COIL
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