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Focus/Tracking/Sled Servo Circuit - LG GWA-4164B Service Manual

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2. Focus/Tracking/Sled Servo Circuit

2-1. Focus, Tracking & Sled Servo Process
Focus, Tracking, Sled Servo
Pick-up
E
A,B,C,D
F
E,F,G,H
B
A
C
D
G
H
Tracking Focusing
Actuator
53
54
T-
T+
LEVEL SHIFT
LEVEL SHIFT
IC301 BD7956FS
Logic
37
38
A+
A-
B-
M
Stepping Motor
A,B,C,D
A,B,C,D
E,F,G,H
51
52
F-
F+
5
4
TDRV
29
30
40
39
B+
Focus Error
Detector
Focus Error
Detector
IC121 A N22113A
IC201
Servo Control
MN103SA6G
FDRV
D
60
A
64
C
STEP2
66
A/D
67
STEP1
FE
TE
A/D
TE
FE
PARALLEL
DIGITAL
COMPENSATOR
SLED
COMPENSATOR
SDRV
53

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Gwa-4166bGsa-4166b