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53
2. Focus/Tracking/Sled Servo Circuit
2-1. Focus, Tracking & Sled Servo Process
F
E
D
C
A
B
H
G
Pick-up
Focus Error
Detector
Focus Error
Detector
A,B,C,D
A,B,C,D
E,F,G,H
A,B,C,D
E,F,G,H
IC121 AN22113A
FE
TE
IC201
Servo Control
MN103SA6G
TE
FE
A/D
D
A
C
SLED
COMPENSATOR
A/D
PARALLEL
DIGITAL
COMPENSATOR
SDRV
60
64
66
67
STEP2
STEP1
IC301 BD7956FS
29
30
M
Stepping Motor
Logic
A+
37
38
40
39
A-
B-
B+
Tracking Focusing
Actuator
T-
T+
F-
F+
5
4
LEVEL SHIFT
FDRV
TDRV
LEVEL SHIFT
53
54
51
52
Focus, Tracking, Sled Servo
Summary of Contents for GSA-4166B
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