2. Focus/Tracking/Sled Servo Circuit
2-1. Focus, Tracking & Sled Servo Process
31
Focus, Tracking Servo
C
B
D
A
F
1
F
2
F
4
F
3
E
1
E
2
E
4
E
3
Pick - up
A,B,C,D,E, F,G,H
A,B,C,D
Focus Error
Detector
Track Error
Detector
A,B,C,D
E,F,G,H
IC200 MT1616E
FE
TE
TE
FE
A/D
PARALLEL
DIGITAL
COMPENSATOR
DAC
SLED
COMPENSATOR
PWM
FMSO
FMSO2
IC100
Servo Control
MT1618E
Tracking x5
Focus x5
Tracking Focusing
Actuator
FOSO
TRSO
F+
F-
T+
T-
Sled Control
M
Stepping Control
Logic
SL1+
IC300
M63028FP
SL1-
SL2-
SL2+
IC300 M63028FP
27
12
28
13
18
14
1
2
MT1628E