Read LG 32LC7D (CHASSIS:LA73E) Service Manual online
- 39 -
- Component doesn't display
Ch
eck J5
004,
J500
5.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
Check the input of Component
s
w
itch(IC5001,IC5002).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
Check th
e o
u
tput o
f Co
mponent
s
w
itch(IC5001,IC5002).
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
Check th
e in
put o
f MST
3361
(IC7004
Pin41,44,46).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
YE
S
YE
S
NO
J5004,J5005
may
ha
v
e
pro
b
lem. Replace this
Jack.
Check the output of
MST3361(IC7004 ).
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
Check th
e in
put an
d
output of
BCM3550(IC4006). Especially
y
ou should
ch
eck
The
H,V sy
nc and clock.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
NO
A
fter checking the i
nput
TR
of compo
nen
t, y
ou
should decide
to replace component s
w
it
ch or
not.
NO
NO
A
ft
e
r ch
ec
kin
g th
e Po
w
e
r of MST
3361
y
ou
should decide
to replace MST3361 or not.
NO
YE
X
This board ha
s big
problem
because Main
chip(BCM3
550)
hav
e some trouble
s.
A
fter checking thorough
ly
all path
once
again,
You should decide to replace BCM3550 o
r not.
A
fter checking the Po
w
e
r o
f component s
w
itch
y
ou should
decide to replace component s
w
itch
or not.
A
ft
e
r ch
ec
kin
g th
e Po
w
e
r of MST
3361
y
ou
should decide
to replace MST3361 or not.
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