42LB4DS (CHASSIS:LA73A) - LG TV Service Manual (repair manual). Page 26

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- 26 -
Ch
eck A
n
ten
na
 C
able
 
Ch
eck 
T
u
n
er
(T
U
600
),
 5
V
, I
F
 o
u
t
Ch
eck LG
D
T
3303
(I
C604
in
pu
ts
 
po
w
er pins
Os
c(2
5Mhz), I
F
 pin
Ch
eck LG
D
T
3303 
O
u
tp
u
ts
3._ Check X260 
Input (
C
LK, 
S
O
P, V
a
lid, 
Error, 
Data)
Ch
eck X260 I
N
PU
T
 C
L
K
, SOP, 
Va
li
d,
 E
rror,
 D
ata
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