Read LG 52LG72-UA (CHASSIS:LA86B) Service Manual online
- 31 -
C
2008
A
V/Component/RGB-PC
Audio(In)
Check JK
701,
JK70
7, JK70
0, JK702, JK
703
.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
NO
JK701, JK707, JK700, JK702, JK703 may
h
a
v
e
problem. Replace this
Jack.
Check the input (Pin 7,8,9,10,11,12,21,22,26,27) of CS5
345(IC500).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
NO
NO
NO
NO
NO
NO
NO
YES
A
ft
e
r checking audio signal line, y
o
u should
decide to
replace item or not.
Check the Output (Pin LOUT1,ROUT1) of CS5345(IC500).
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 &
I2C of this chip
, y
o
u should decide to replace this or not
YES
YES
Check the input (Pin INPUT1-,INPUT2-) of MC33078DR2G(IC504).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
A
ft
e
r checking audio signal line, y
o
u should
decide to
replace item or not.
YES
Check the Output (Pin OUTP
U
T1,OUTPUT2) of MC33078DR2G(IC504).
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.
YES
Check the input (Pin
A
INL,
A
INR) of CS5340(IC502).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
A
ft
e
r checking audio signal line, y
o
u should
decide to
replace item or not.
YES
Check the Output (Pin SDOU
T,SCLK,LRCK) of CS5340(I
C502).
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 &
MLCK & reset of this chip,
y
ou should
decide to replace this or not.
YES
Check the input (Pin
A
H
24,A
J24,
A
K
24) of
BCM355x((IC100).
Measure
w
a
v
e
form at R559,
R560,R
561 b
e
cause itís mo
re eas
y
to
ch
e
ck.
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
A
ft
e
r checking audio signal line, y
o
u should
decide to
replace item or not.
Click on the first or last page to see other 52LG72-UA (CHASSIS:LA86B) service manuals if exist.