LG 42LC4D (CHASSIS:LA73E) Service Manual ▷ View online
- 33 -
- Before Video network
Video
Net
w
o
rk
Sw
it
h
Front
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 Block
BVB
Int
erf
ace
BVB
Int
erf
ace
Me
mo
ry
In
te
rf
ace
(S
C
B
)
Me
mo
ry
In
te
rf
ace
(S
C
B
)
SCB
BUS
SCB
BUS
Crom
a
Co
nv
ersi
o
n
Crom
a
Co
nv
ersi
o
n
Horizon
Pa
n
Sca
n
Horizon
Pa
n
Sca
n
Fra
m
e
Buffer
Fra
m
e
Buffer
De-Int
er
De-Int
er
MPEG Feeder
BVB
Int
erf
ace
BVB
Int
erf
ace
SCB
DA
TA
Buffer
SCB
DA
TA
Buffer
P
ixel
Croppin
g
P
ixel
Croppin
g
Color
Ex
pa
nsi
o
n
Color
Ex
pa
nsi
o
n
Color
Ke
y
Color
Ke
y
Al
pha
Pr
e-
Multipl
Al
pha
Pr
e-
Multipl
Gr
ap
hic
Feed
er
B
lock
Horizon
Sca
ler
Horizon
Sca
ler
Gamma
Corre
ction
Gamma
Corre
ction
Color
Con
ve
rto
r
Color
Con
ve
rto
r
BVB
Int
erf
ace
BVB
Int
erf
ace
Coef
T
abl
e
Coef
T
abl
e
CLUT
CLUT
???
???
RGB
Con
ve
rt
er
RGB
Con
ve
rt
er
Input
Ti
min
g
Ad
ju
st
Input
Ti
min
g
Ad
ju
st
DV
I-
Secondary
BVB
Int
erf
ace
BVB
Int
erf
ace
???
???
RGB
Con
ve
rt
er
RGB
Con
ve
rt
er
Input
Ti
min
g
Ad
ju
st
Input
Ti
min
g
Ad
ju
st
DVI-P
rim
ary
BVB
Int
erf
ace
BVB
Int
erf
ace
HDMI
R
ece
iv
e
De
cod
e
HDMI
R
ece
iv
e
De
cod
e
HDCP
De
cr
yp
t
HDCP
De
cr
yp
t
HDMI Blo
ck
HDMI
TMDS
Pins
HDMI
TMDS
Pins
Lbox
De
tect
Lbox
Det
ec
t
TAB
2D -
S
cal
er
TAB
2D
-
S
caler
2D -
S
cal
er
2D
-
S
caler
MAD-IT
MAD-IT
NULL
NULL
Feed Back
Feed
Ba
ck
SCB
BUS
SCB
BUS
Crom
a
Co
nv
ersi
o
n
Crom
a
Co
nv
ersi
o
n
Horizon
Pa
n
Sca
n
Horizon
Pa
n
Sca
n
Fra
m
e
Buffer
Fra
m
e
Buffer
De-Int
er
De-Int
er
Vide
o Feeder
BVB
Int
erf
ace
BVB
Int
erf
ace
ANALO
G
Pins
ANALO
G
Pins
HDMI
Pins
HDMI
Pins
DVI
Pins
DVI
Pins
- 34 -
- Scaler and MAD
Video
Net
w
o
rk
Sw
it
h
Front
Lbox
De
tect
Lbox
De
tect
MUX
MUX
BVB
R
ece
iv
er
BVB
R
ece
iv
er
Ve
rt
ica
l
Sca
ler
Ve
rt
ica
l
Sca
ler
TA
B
TA
B
MUX
MUX
MUX
MUX
Hoar
izon
al
Sca
ler
Hoar
izon
al
Sca
ler
TA
B
2D-S
caler
MUX
MUX
BVB
R
ece
iv
er
BVB
R
ece
iv
er
Ve
rt
ica
l
Sca
ler
Ve
rt
ica
l
Sca
ler
MUX
MUX
MUX
MUX
Hoar
izon
al
Sca
ler
Hoar
izon
al
Sca
ler
2D-S
cal
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
Pr
ocess
in
g
Blo
c
k
P
ixel
Pr
ocess
in
g
Blo
c
k
SCB
Outp
ut
SCB
Outp
ut
BVB
Int
erf
ace
BVB
Int
erf
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
ee
d
er
Blo
ck
- 35 -
- 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
ck
DM
A
DM
A
SCB
BUS
SCB
BUS
NULL
NULL
Feed Back
Feed Back
VBP
(Video By
pass)
VBP
(Video By
pass)
Gr
ap
hic
Feed
er
B
lock
BVB
Re
ci
e
ve
r
BVB
Re
ci
e
ve
r
CA
B
CA
B
422 TO
444
Co
nv
ersi
o
n
422 TO
444
Co
nv
ersi
o
n
LA
B
LA
B
Color
CLIP
Color
CLIP
Vide
o Int
ra-Surface (
W
it
h PEP)
Lum
a
Ke
yi
n
g
Lum
a
Ke
yi
n
g
BVB
Int
erf
ace
BVB
Int
erf
ace
Color Br
ight
Ad
ju
st
(Matri
x)
Color Br
ight
Ad
ju
st
(Matri
x)
Croppin
g
Croppin
g
BackGround
Color
Y/Cb/Cr Register
Y/Cb/Cr Register
BVB
Re
ci
e
ve
r
BVB
Re
ci
e
ve
r
Gr
ap
hics
Int
ra
-Su
rface
Croppin
g
Croppin
g
BV
B
In
te
rf
ac
e
BV
B
In
te
rf
ac
e
Sc
reen
Compositer
Sc
reen
Compositer
Surfaces
MUX
Surfaces
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
erf
ace
BVB
Int
erf
ace
PEP COMPOSITOR
BVB
Re
ci
e
ve
r
BVB
Re
ci
e
ve
r
422 TO
444
Co
nv
ersi
o
n
422 TO
444
Co
nv
ersi
o
n
Video Intra-Surface (Without PEP
)
Color Br
ight
Ad
ju
st
(Matri
x)
Color Br
ight
Ad
ju
st
(Matri
x)
Lum
a
Ke
yi
n
g
Lum
a
Ke
yi
n
g
Croppin
g
Croppin
g
BVB
Int
erf
ace
BVB
Int
erf
ace
- 36 -
- 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)
Digital
Vide
o
Form
att
er
Digital
Vide
o
Form
att
er
VIDE
O_ENC_P
R
IM_CO
NTROL.SE
LECT
656
656
CSC
(Matri
x)
CSC
(Matri
x)
Digital
Vide
o
Form
att
er
Digital
Vide
o
Form
att
er
DVI
Int
erf
ace
DVI
Int
erf
ace
Mux
Mux
Mux
Mux
Cro
ss
Ba
r
Cro
ss
Ba
r
CSC
(Matri
x)
CSC
(Matri
x)
Vide
o
Form
att
er
Vide
o
Form
att
er
SUB-Carr
ie
r
Modul
ator
SUB-Carr
ie
r
Modul
ator
Input
Ti
min
g
Input
Ti
min
g
VI
DEO
_E
N
C_BY
PASS_
CO
N
T
RO
L.
SEL
E
C
T
Digital
Ti
min
g
RA
M
Digital
Ti
min
g
RA
M
Digital
Ti
min
g
Generat
o
r
Digital
Ti
min
g
Generat
o
r
Digital
Ti
min
g
Generat
o
r
Digital
Ti
min
g
Generat
o
r
MI
SC
_I
T
U
656_
IN
_M
U
X
.S
ELE
CT
MISC_DVI
_
IN_
MUX.S
E
LECT
656
DVI
DAC3
DAC2
DAC1
DAC0
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