Focus/Tracking/Sled Servo Circuit - LG RHT497H Service Manual

2. FOCUS/TRACKING/SLED SERVO CIRCUIT

2-1. Focus, Tracking & Sled Servo Process
Focus, Tracking, Sled Servo
Pick-up
E
F
A,B,C,D
E,F,G,H
B A
C D
G
H
Tracking Focusing
Actuator
LIC301 BD7776ARFS
10 9 8
T- T+ F-
LEVEL SHIFT LEVEL SHIFT
Logic
30 29 31
A+ A- B-
M
Stepping Motor
7
F+
FDRV
6
TDRV
5
STEP2
25
STEP1
26
32
B+
LIC101 AN22117A
LIC201 Servo Control
MN103SC7G
A,B,C,D
Focus Error
Detector
FE
A/D
FE
69
D
A
C
73
76
A/D
75
4-35
MPX
Block
A,B,C,D E,F,G,H
Track Error
Detector
TE
A/D
TE
PARALLEL
DIGITAL
COMPENSATOR
SLED
COMPENSATOR
SDRV