LG 22LN4000 (CHASSIS:LM91N) Service Manual ▷ View online
- 17 -
8. Abnormal sound (AV)-Main PCBA
wGGh}GG f
Abnormal sound (AV)
YES
NO
Insult AV cable tight
1
Change IC600
WAVEFORMS
pGG Gj]__Sj]_`
2
Check Line between JK101 and IC600
is open or short, Another is
change AV cable
NO
YES
j]__Sj]_`G OGP
2
- 18 -
19
V
19
V
_am
p
D
C
/D
C
3.
3V
S
tan
d
by
5v
_t
un
er
19
V
_a
m
p
3.
3V
S
ta
nd
by
5v
_t
un
er
`
TM
D
S
/H
D
M
I R
X
V
IF
D
e-
m
od
e
D
ec
od
er
sa
w
fil
te
r
A
D
C
A
ud
io
pr
oc
es
so
r
S
ca
lar
V
id
eo
pr
oc
es
so
r
LV
D
S
TX
S
ys
te
m
E
E
P
R
O
M
A
D
C
S
pe
ake
r
A
m
p(
5W
)
LC
D
m
od
ul
e
Fl
as
h
vi
de
o
A
D
C
au
di
o
sa
w
fil
te
r
O
S
D
/L
U
T
C
ry
sta
l
IR
LE
D
To
uc
h
S
IF
D
e-
m
od
e
LD
O
2.
5v
_S
D
R
M
C
U
64
M
S
D
R
A
M
C
V
B
S
R
F
3.
3v
_A
V
C
C
1.
1V
_V
C
C
K
1.
25
v_
AV
D
D
LV
D
S
13
66
X
76
8
60
hz
76
M
hz
24
M
hz
M
T8
22
3L
D
C
/D
C
D
C
/D
C
D
C
/D
C
LD
O
A
da
pte
r
B
JT
12
v_
m
od
ul
e
B
ur
st
up
(2
2”
)
24
V
BLOCK DIAGRAM
- 19 -
A2
A31
900
200
400
540
910
120
122
300
510
502
51
1
501
800
LV
1
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
AP
C
PC
W
M
_4828539
:W
P_GLOBAL_P
FW
P_GLOBAL_PF
APC
PC
WM
_4828539:W
P_G
LO
BAL_
PF
WP
_G
LO
BAL_
PF
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