Focus/Tracking/Sled Servo Circuit - LG GCE-8240B Service Manual

3. Focus/Tracking/Sled Servo Circuit

3-1. Focus, Tracking & Sled Servo Process
Focus, Tracking Servo
Pick- up
E
F
C B
A,B,C,D,E,F,G,H
D A
G
H
Tracking Focusing
Actuator
LEVEL SHIFT
IC501
BD7902C
Sled Control
SLED MOTOR
M
A,B,C,D
A,B,C,D
E,F,G,H
LEVEL SHIFT
IC501 BD7902C
SM_A-
SM_A+
SM_B+
SM_B-
IC401 CXA2638R
Focus Error
Detector
Track Error
Detector
FAO
TAO
IC402
BU2500FV
(DAC)
FE
TE
IC201
Servo Control
OTI9797
TE
Low freq Gain Filter
Ditital EQ
Sled Control
Signal
SLO
A/D
A/D
FE
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