LG 42LB9RTE (CHASSIS:LP7BB) Service Manual ▷ View online
- 17 -
LG Electronics. Inc. All right reserved.
C
2008
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 vide
o
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)
Chan
ge the IC(
IC300)
Check the po
wer
( Check L10
04
)
Chan
ge 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
- 18 -
LG Electronics. Inc. All right reserved.
C
2008
5. In the case of becomes unusual
displ
ay
from rear AV mode(main)
6. In the case of becomes unusual di
spl
ay
from rear S-Video mode(main)
7. In t
h
e case of becomes unusual displ
ay
from side AV mode(main)
Is normal video input
of the A/V jack?
Is normal video input
of the A/V jack?
Is normal video input
of the A/V jack?
Check the in
put source
Same as Block
A
Same as Block
A
Same as Block
A
Check the input source
Check the input source
YE
S
NO
YE
S
NO
YE
S
NO
- 19 -
LG Electronics. Inc. All right reserved.
C
2008
8. In the case of becomes unusual di
spl
ay
from side S-Vi
deo mode(main)
Is normal video input
of the A/V jack?
(Check R339, R341, L310)
Check the input source
Same as Block
A
YE
S
NO
- 20 -
LG Electronics. Inc. All right reserved.
C
2008
13. In case of becomes unusual display
from RF mode(Sub)
Is normal video output
of the
T
uner?
(Check T
U
201
_Pin1
4)
Is normal the I2C communication ?
(Check Pin5,
Pin4)
Is normal vide
o
output
of CXA2069Q?
(Check R3
12, In case of S-Video
check R312, R314)
Is the
T
uner Cable
connected w
e
ll?
Is normal the Input voltage ?
(Check Pin8,
Pin6)
Is normal the Input voltage ?
(Check L3
08)
Is normal the
I2C communication ?
(Check R309, R310)
Chan
ge the IC(
IC300)
Check the po
wer
( Check L10
04
)
Chan
ge the IC(
IC700)
Is the LVDS Cable
connected w
e
ll?
Cabl
e inserts
w
e
ll
Change the T
uner
Check the po
wer
( L1103)
Cabl
e inserts
w
e
ll.
B
NO
NO
NO
NO
NO
NO
NO
YE
S
YE
S
YE
S
YE
S
Y
E
S
YE
S
Y
E
S
14. In case PIP d
o
esn’t display from other modes(Sub)
S
a
m
e
as the
case
of main
exc
e
p
t block A
should be
change to B
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