Read LG 52LG70-UA (CHASSIS:LA86A) Service Manual online
- 29 -
C
2008
S
pdif
&
Coaxial
Audio(Out)
Check the outp
ut (Pin AP11) o
f BCM3553(IC
100).
Measure
w
a
vef
orm at R2638 because its more eas
y to check.
Can you see the normal signa
l?
Check the input of JK500, JK501.
Can
you se
e the normal
w
a
vef
orm?
YES
NO
NO
T
h
is board has big problem because Main c
h
ip(BCM3553) have some troubles.
After checking
thoroug
hl
y al
l p
a
th once ag
ain
,
You should decide to replace
BCM3553 or not.
After checking audio signal line,
y
ou sh
ould decide to replac
e
item or not.
YES
After checking the Jack, y
ou s
hould
decide to
replace item o
r not.
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