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Tracking & Sled Circuit - LG GSA-4040B Service Manual

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3. Tracking & Sled Circuit
3-1-1. Block Diagram (Tracking Following)
A1~A4
(F, E)
Disc
Optical
Motor unit
Pick-up
HOP-8511T
TACT-
TACT+
A+
A-
B+
B-
SLED MOTOR
Unit
TACT+
TACT-
A-
B-
A+
B+
MPPO
(A+D)-(B+C)
SPPO
DVD : (A1+A4)-(A2+A3)
CD : (EF1+EF2)-(EF3+EF4)-K*(E-F)
TRD
41
DAC
TVN
19
PWM
18
TVP
15
ENC1
SLIN2
SLIN1
48
IC501
47
SLO1+
BD7907
37
SL01-
36
SLO2+
35
SLO2-
34
27
VC
IC101
HD153721
L
P
G
F
Sled
Compensator
R630
2
C618
13
R635
C619
TRKIN
52
CTL1
22
MUTE2
CTL2
23
MUTE1
SLIN1
28
SLIN2
29
1.65V
HAVC
L
LS
P
to
F
V14
Tracking
ADC
Compensator
IC701
HD62604
IC602
BU2507
S-DAC
R624
C627
GND
5
TEI
R706
C708
GND
33
TE
ENC1
TVN
TVP
TRD
SLIN1
SLIN2
43

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