LG 32LC7D (CHASSIS:LA73E) Service Manual ▷ View online
- 33 -
- Scaler and MAD
Video
Net
w
o
rk
Sw
it
h
Front
Lbox
D
e
tect
Lbox
D
e
tect
MUX
MUX
BVB
R
ece
iv
er
BVB
R
ece
iv
er
Ve
rt
ica
l
S
c
al
er
Ve
rt
ica
l
S
c
al
er
TA
B
TA
B
MUX
MUX
MUX
MUX
Hoar
izon
al
S
c
al
er
Hoar
izon
al
S
c
al
er
T
A
B
2
D
-S
caler
MUX
MUX
BVB
R
ece
iv
er
BVB
R
ece
iv
er
Ve
rt
ica
l
S
c
al
er
Ve
rt
ica
l
S
c
al
er
MUX
MUX
MUX
MUX
Hoar
izon
al
S
c
al
er
Hoar
izon
al
S
c
al
er
2D-S
c
al
er
BVB
R
ece
iv
er
BVB
R
ece
iv
er
P
ixel
Distr
ibuti
on
Blo
c
k
P
ixel
Distr
ibuti
on
Blo
c
k
P
ixel
P
rocess
in
g
Blo
c
k
P
ixel
P
rocess
in
g
Blo
c
k
SCB
Outp
ut
SCB
Outp
ut
BVB
In
te
rf
ace
BVB
In
te
rf
ace
Fi
el
d Contro
l B
loc
k
Fi
el
d Contro
l B
loc
k
MAD
Video
Net
w
o
rk
Sw
it
h
B
ack
CRC
CRC
Captur
e
0
Captur
e
0
Captur
e
1
Captur
e
1
Captur
e
2
Captur
e
2
NULL
NULL
NULL
NULL
Feed
Ba
ck
Feed
Ba
ck
VBP
VBP
Composito
r
Composito
r
PE
P
PE
P
Gr
aph
ic
F
e
e
de
r Blo
c
k
- 34 -
- PEP and Compositor
Video
Net
w
o
rk
Sw
it
h
Front
CRC
CRC
Video
Net
w
o
rk
Sw
it
h
Front
BVB
R
ece
iv
er
BVB
R
ece
iv
er
Pack
in
g
&
RDM
A
Tri
g
Pack
in
g
&
RDM
A
Tri
g
Burst
FIF
O
Burst
FIF
O
Captur
e
Blo
c
k
DM
A
DM
A
SCB
BUS
SCB
BUS
NULL
NULL
Feed
Back
Feed
Back
VBP
(Video By
pass)
VBP
(Video By
pass)
G
ra
p
hic
Feed
e
r B
lock
BVB
Re
ci
e
v
e
r
BVB
Re
ci
e
v
e
r
CA
B
CA
B
422 TO
444
C
o
n
v
ersi
o
n
422 TO
444
C
o
n
v
ersi
o
n
LA
B
LA
B
Color
CLIP
Color
CLIP
Vide
o
In
tr
a-Su
rf
ace (
W
it
h
PEP)
Lum
a
Ke
y
in
g
Lum
a
Ke
y
in
g
BVB
In
te
rf
ace
BVB
In
te
rf
ace
Color Br
ight
Ad
ju
s
t
(Matri
x)
Color Br
ight
Ad
ju
s
t
(Matri
x)
Croppin
g
Croppin
g
B
ackGround
Co
lor
Y/Cb/Cr Regi
ster
Y/Cb/Cr Regi
ster
BVB
Re
ci
e
v
e
r
BVB
Re
ci
e
v
e
r
G
ra
p
hics
In
tr
a
-Su
rf
ace
Croppin
g
Croppin
g
BV
B
In
te
rfa
c
e
BV
B
In
te
rfa
c
e
Sc
reen
Composite
r
Sc
reen
Composite
r
Su
rf
aces
MUX
Su
rf
aces
MUX
Bl
end
0
Bl
end
0
Bl
end
1
Bl
end
1
Bl
end
2
Bl
end
2
For
e
Gr
ound
For
e
Gr
ound
For
e
Gr
ound
B
ack
Gr
ound
B
ack
Gr
ound
B
ack
Gr
ound
BVB
Int
e
rf
ace
BVB
Int
e
rf
ace
PEP COMPOSITOR
BVB
Re
ci
e
v
e
r
BVB
Re
ci
e
v
e
r
422 TO
444
C
o
n
v
ersi
o
n
422 TO
444
C
o
n
v
ersi
o
n
Video Intra-Surface (Without PEP
)
Color Br
ight
Ad
ju
s
t
(Matri
x)
Color Br
ight
Ad
ju
s
t
(Matri
x)
Lum
a
Ke
y
in
g
Lum
a
Ke
y
in
g
Croppin
g
Croppin
g
BVB
In
te
rf
ace
BVB
In
te
rf
ace
- 35 -
- Back end(Digital and Analog)
VBP
(Video By
pass)
VBP
(Video By
pass)
Video
Composito
r
Video
Composito
r
Mux
Mux
Mux
Mux
CSC
(Matri
x)
CSC
(Matri
x)
Digit
al
Vide
o
Form
a
tt
er
Digit
al
Vide
o
Form
a
tt
er
VIDE
O_ENC_P
R
IM_CO
N
TROL.SE
L
ECT
656
656
CSC
(Matri
x)
CSC
(Matri
x)
Digit
al
Vide
o
Form
a
tt
er
Digit
al
Vide
o
Form
a
tt
er
DVI
In
te
rf
ace
DVI
In
te
rf
ace
Mux
Mux
Mux
Mux
Cro
s
s
Ba
r
Cro
s
s
Ba
r
CSC
(Matri
x)
CSC
(Matri
x)
Vide
o
Form
a
tt
er
Vide
o
Form
a
tt
er
SUB-Carr
ier
Modul
ator
SUB-Carr
ier
Modul
ator
Input
Ti
min
g
Input
Ti
min
g
V
IDEO
_
E
N
C_BY
PASS_
CO
N
T
RO
L.
SEL
E
C
T
Digit
al
Ti
min
g
RA
M
Digit
al
Ti
min
g
RA
M
Digit
al
Ti
min
g
Gener
at
o
r
Digit
al
Ti
min
g
Gener
at
o
r
Digit
al
Ti
min
g
Gener
at
o
r
Digit
al
Ti
min
g
Gener
at
o
r
M
IS
C
_I
T
U
656_
IN
_
M
U
X
.S
ELE
C
T
MISC_DVI
_
IN_
MUX.S
E
LECT
656
DVI
DAC3
DAC2
DAC1
DAC0
- 36 -
- Explanation
Mpeg Feeder And Video Feeder (MFD and VFD)
-Mpeg Feeder is a data path
of VSB or QAM decoded si
gn
al. These signals go to
the Mi
nitita
n
of BCM3
55
0.
-In the mini
titan
bl
ock do pr
ocessi
ng the MPEG and video.
VDEC ( Video Displ
ay Decoder)
-This block has several
detai
led bl
ock. It can handle the
input composite signal
for example, Y/C separation,
color decodi
ng, auto gai
n control, etc.
AF
E
AF
E
Front
End
Front
End
Y/C
Se
pa
ra
ti
on
Y/C
Se
pa
ra
ti
on
Chrom
a
De
mo
Chrom
a
De
mo
B
ack
End
B
ack
End
VDEC Detai
l
Block
BVB
In
te
rf
ace
BVB
In
te
rf
ace
Digital Input
-Digital input
can handle digit
al video signal.
In our
syst
em
through this pat
h,
com
ponent
,R
G
B
PC,
HD
MI
/DVI
signals
are deco
d
ed. So this path is very impo
rta
nt block i
n
o
u
r system.
Explanation
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