Read LG 52LG72-UA (CHASSIS:LA86B) Service Manual online
- 35 -
C
2008
M
nt out
Audio(Out)
Check the output (Pin
A
N
28,
A
P
29) of BC
M355x(IC100).
Measure
w
a
v
e
form at R685, R686 because itís more easy
to check.
Can y
ou see t
h
e n
o
rmal sign
al?
NO
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.
Check th
e in
pu
t o
f JK704.
Can
y
ou see t
h
e n
o
rmal
w
a
v
e
fo
rm?
YES
NO
A
ft
e
r checking audio signal line, y
ou should
decide to
replace item or not.
YES
A
ft
e
r checking the Jack, y
o
u should
decide to replace item or not.
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