LG CED-8081B Service Manual page 42

3. Focus/Tracking/Sled Servo Circuit
3-1. Focus, Tracking & Sled Servo Process
Focus, Tracking Serve
Pick up
E
F
C B
D A
G
H
Focus, Tracking
Actuator
_
T+ T F+
Level shift
Level shift
Sled control
Sled Motor
M
Hall sensor
4
H1 +
H1 -
H2 +
H2 -
28
A,B,C,D,E,F,G,H
A,B,C,D
8
A,B,C,D
E,F,G,H
F _
IC501
Driver
BA5983FM
IC501 Driver BA5983FM
SLD+
SLD-
IC502 BA5925FA
Speed
Detector
SLD-FG
IC401 OTI9071
FE
Focus Error
Detector
TE
Track Error
Detector
IC201
Servo control
OTI9790
FAO
FAO
D/A
TAO
TAO
Sled control
signal
TE
FE
TE FE
A/D
Digital EQ
Auto Adj. Circuit
SLO
SLED -MOVE
IC409
BU2500
IC301
µ-com