LG GSA-4167B - Manual (Page 47)

3-1-2. Block Diagram (Seek)
51
Disc
Motor unit Optical
Pick-up
HOP-7632TS
SUMF
RFIP
RFIN
(EF1~EF4)
A,B,C,D
TACT+ TACT-
IC101
R2S35002 MPPO
(A+D)-(B+C)
G
HAVC
LS
to
V14
1
L
P
F L
P
F SPPO
[(EF1+EF4)-(EF2+EF3)]
A+
A-
B+
B-
SLED MOTOR
Unit
A+B+C+D
G
HAVC
LS
to
V14
L
P
F
L
P
F
38
79
80
81
EQ
MIRR
DET
AGC
TOP
HOLD
63 62
BOTTOM
HOLD
-
+
-
+
TE1
MIRRTOPH MIRRBOTH
C128
GND
MIRR
VREF1
VREF1
SL2
D
A
C
Tracking
Compensator
IC301
R8J32007
173
Sled
Compensator
A
D
C
149
M
U
X
Short
Seek
Algorithm
Loog
Seek
Algorithm
D
A
C
182
181
183
TRD
SL1
Track Counter
and Timer
R101
C101
GND
MIRR
TE1
TE
IP2MIRR
C127
GND