43
3. Tracking & Sled Circuit
3-1-1. Block Diagram (Tracking Following)
Disc
Motor unit
Optical
Pick-up
HOP-7532TS
A,B,C,D
(EF1~EF4)
TE
TE
R337
C328
GND
TE
ADC
Tracking
Compensator
DAC
TRD
TACT+
TACT-
IC101
HD153724TF
IC301
R8J32006FP
MPPO
(A+D)-(B+C)
G
HAVC
LS
to
V14
6
103
117
L
P
F
L
P
F
SPPO
(A+D)-(B+C)-K[(EF1+EF4)-(EF2+EF3)]
Sled
Compensator
DAC
SL2
119
SL1
118
A+
A-
B+
B-
SLED MOTOR
Unit
TRD
R348
IC601
R2S30200FP
TACT+
TACT-
EN1
EN2
CTL1
CTL2
REF
1.65V
TOIN
39
42
20
21
36
37
SL2
2
SL1
3
SL1IN
SL2IN
A-
B-
8
10
A+
B+
6
9
SL2N
SL1N
SL2P
SL1P
C339
1.65V
C381
C340
R347
1.65V
R374
R349
R384
R350