LG GSA-4167B Service Manual page 47

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