Read LG 52LG72-UA (CHASSIS:LA86B) Service Manual online
- 28 -
C
2008
HDMI
Check input c
onnect
JK600,JK601,
JK602,JK708
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
Check DDC communication lines
(IC601, IC602,I
C603, IC701)
JK60
0,JK6
01,
JK70
8 ma
y
h
a
v
e
p
roblem. R
e
place th
is Jack.
Check the output of
PI3HDMI341
A
T
R(IC600).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
A
ft
e
r checking the Po
w
e
r
of this chip, y
ou should
decide to replace this or not.
Check HD
CP co
mmunicatio
n lin
es(IC102)
A
ft
e
r checking the Po
w
e
r
of this chip, y
ou should
decide to replace this or not.
YES
YES
YES
NO
NO
NO
YES
This board ha
s big
problem
because Main chip(BCM355x) ha
v
e
some troubles.
A
ft
e
r ch
ec
kin
g th
orou
ghly
all p
a
th
once again
, You
sho
uld d
ecid
e
to rep
lace BCM
355x o
r n
o
t.
Video
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