Read LG 42LB5RT (CHASSIS:LP7BA) Service Manual online
- 15 -
Sy
mptom
1) After on
c
e
shining,
it doesn
’t di
sc
h
a
rg
e
minutely
from module.
2) Th
e
re
la
y
fall
s. ( Th
e
sound i
s
au
dible
"C
lick
")
3) It i
s
con
v
erted
w
ith the
c
o
lor
w
h
e
re th
e front
LED i
s
re
d
fro
m
gr
e
e
n
.
2. Protectio
n mode
Start check
Is
t
he
PSU
no
rm
a
l?
Is
the
each
connecto
r
no
rma
l?
Is t
h
e
Y-
B
o
ard
no
rm
a
l ?
Is
output
the no
rm
a
lity
Lo
w
/H
igh
Vo
ltage e
xce
p
t
Stand-b
y
5
V
?
Re
pl
ace
the po
wer
boar
d
Afte
r connecting
we
ll each
connecto
r
the
nor
ma
lity it operates?
Re
pl
ace
the po
wer
boar
d
Is
no
rm
a
l
the output
vo
ltage
after
re
mo
ve
P1 connecto
r
of
Y-B/D?
Re
pl
ace Y-B/D
Is
no
rm
a
l
the fuse
(F
S
2
,F
S3
) on
Y
-B
/D?
Re
pl
ace the fuse
Is
the Z
-
Board
no
rm
a
l ?
Is
no
rm
a
l
the output
vo
ltage
after
re
mo
ve
P1
connecto
r
of
Z
-B/D?
Re
pl
ace Z
-B/D
Is
no
rm
a
l
the fuse
(F
S
1
,F
S2
) on
Z
-B
/D?
Re
pl
ace the fuse
Is t
h
e
X-
B
o
ard
no
rm
a
l ?
Afte
r
re
mo
ve
P100,110 output
vo
ltage no
rm
a
lity:
Re
pl
a
c
e
Ri
g
h
t X-B/
D
Afte
r
re
mo
ve
P200,210 output
vo
ltage no
rm
a
lity:
Re
pl
ace Left X-
B/D
Is
no
rm
a
l
the output
vo
ltage
a
fte
r
re
mo
ve
P100,110,20
0,
210
connecto
r of X-
B/D?
YE
S
YE
S
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
NO
NO
NO
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