Read LG 42LG6000 / 42LG6100 (CHASSIS:LD89F) Service Manual online
- 15 -
C
2008
1-1. The whole flowchar
t which it follows in voltage output sta
te
1. Power
Board
No
No
No
St
art
c
h
eck
Do
es
no
t s
cr
ee
n
w
hol
e comes out?
Does not
low
v
oltag
e outp
ut comes
out?
Does n
ot
Inv
er
ter sign
al
outp
ut
comes out?
No
No
No
Ye
s
Ye
s
No
Ye
s
Is
the In
ter
face
sig
n
a
l oper
ated?
2.
Check the
In
ter
face
si
gn
a
l conditi
on
Ye
s
Ye
s
Do
es not
the
INV 24V
v
o
lta
ge output
co
m
e
s ou
t?
Ye
s
Ye
s
Is
it
identica
l with
po
w
e
r o
ff condi
tion?
1.
C
heck the
Pow
er
o
ff condi
tion
Ye
s
D
oes not
the
St
-b
y 5
V
(P
-5
V
) sign
a
l
comes
out?
Ye
s
D
oes not
the
VSC
sig
na
l IN
V_C
T
L
co
mes
out?
Ye
s
Man
u
fact
ure e
n
terprise
me
an
ing
of
a passage
No
6.
C
h
eck the
VSC
lo
w
Vol
tage output
Ye
s
Does not
the
AC Detect
si
gn
a
l
comes
out?
D
oes not
the
RL_ON/P
W
R
_ON/
O
F
F
co
m
e
s ou
t?
D
oes not
the
V
SC
Lo
w
Vol
ta
ge output
co
m
e
s out?
3.
C
heck the
S
t_by
5V
sig
n
a
l ci
rc
u
it
4.
Check the AC Detect signa
l circu
it
5.
C
h
eck the
VSC
R
L_ON
?P
W
R
_ON
/O
F
F
si
gna
l
7.
C
heck the
VSC
IN
V_C
T
L si
gn
a
l
8.
C
h
eck the
IN
V
24V
vo
lta
ge output
ci
rc
u
it
TROUBLE SHOOTING
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