Read LG 42LB5RT (CHASSIS:LP7BA) Service Manual online
- 17 -
4. In case of becomes u
nusual
display
from
RF mod
e
(Main)
A
Is normal video output
of the
T
uner?
(Check T
U
200
_Pin1
4)
Is normal the I2C communication ?
(Check Pin5,
Pin4)
Is normal the Input voltage ?
(Check L3
08)
Is normal the Input voltage ?
(Check Pin8,
Pin6)
Is normal video
output
of CXA2069Q?
(Check R3
24, In case of S-Video
check R324, R328)
Is the
T
uner Cable
connected w
e
ll?
Change the T
uner
Check the po
wer
Cabl
e inserts
w
e
ll.
Is normal the
I2C communication ?
(Check R309, R310)
Change the IC(
IC300)
Check the po
wer
( Check L10
04
)
Change the IC(
IC700)
Is the LVDS Cable
connected w
e
ll?
Cabl
e inserts
w
e
ll
NO
NO
NO
YE
S
NO
YE
S
Y
E
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
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