DOWNLOAD LG 37LG50D (CHASSIS:LJ82A) Service Manual ↓ Size: 2.31 MB | Pages: 39 in PDF or view online for FREE

Model
37LG50D (CHASSIS:LJ82A)
Pages
39
Size
2.31 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lg50d-chassis-lj82a.pdf
Date
PREV: LG 37LG50D (CHASSIS:LE81D) Service Manual

LG 37LG50D (CHASSIS:LJ82A) Service Manual ▷ View online

- 29 -
Digital TV Audio Trouble Shooting
Check v ideo output
Foll ow pr oc edure  All s ourc e audio  
trouble  shooti ng 
Y
Foll ow pr oc edure  digita l TV 
video trouble  shootin g
N
N
Maybe BCM3553 in tern al au dio 
DSP has prob lems . Repla ce it
- 30 -
Analog TV Audio Trouble Shooting
Check v ideo output
Foll ow pr oc edure  All s ourc e audio  
trouble  shooti ng 
Y
Foll ow pr oc edure  analog TV  
video trouble  shootin g
N
N
Maybe BCM3553 audio blo ck h as 
problems. Rep lace it
Check L 801 voltag e level 5V
Replace it
N
Y
Check SIF  sign al
C801 / C806 / Q800
Replace it
N
Y
Check SIF  sign al
R652 / C665
Replace it
N
Y
- 31 -
Compon
en
t / RG
B / AV 
Audio Trouble Shooting
Ch
eck v
id
e
o
 o
u
tp
u
t
Y
Foll
o
w
 pr
oc
edure
 
ex
te
rn
a
l input
 v
ide
o 
trouble
 s
h
o
o
ti
ng
N
Check Connector
J
K
700 / J
K
702 (Compone
nt)
JK70
3 (RGB)
JK70
1 / JK707
 & cab
le ( Rear, 
Side)
Replace connector
N
Y
Ch
eck sig
n
a
l
C734 / R74
6
 / C735 / R75
2
 
(Compone
nt1
)
C736 / R74
8
 / C737 / R75
6
 
(Compone
nt2
)
C733 / R76
1
 / C732 / R76
2
 (RGB)
C701 / R73
7
 / C700 / R73
8
 (AV
 Rear)
C729 / R73
3
 / C728 / R79
5
 (AV
 Side)
Rep
lace it
N
Y
Ch
eck IC50
0 p
o
w
e
r L
512 v
o
ltag
e 
lev
el 9V
Rep
lace it
N
Y
Ch
eck sig
n
a
l
R532 / R533 / C555 / R568 / C563 / 
R582
Rep
lace it o
r IC500
N
Y
Ch
eck IC50
3 p
o
w
e
r L
513 v
o
ltag
e 
lev
el 9V
Rep
lace it
N
Y
Ch
eck sig
n
a
l
C554 / R569 / R581 / C56
2
Rep
lace it o
r IC503
N
Y
Ch
eck IC50
2 p
o
w
e
r L
514 v
o
ltag
e 
le
v
e
l 3.3V & L
515 
v
o
ltag
e lev
el 
5V
Rep
lace it
N
Y
Ch
eck IC50
2 p
o
w
e
r L
514 v
o
ltag
e 
le
v
e
l 3.3V & L
515 
v
o
ltag
e lev
el 
5V
Rep
lace it
N
Y
Ch
eck I2S sig
n
a
l
R548 / R54
9 / R550
Rep
lace it o
r IC502
N
Y
Ch
eck A
u
d
io
 clo
c
k
R134
Rep
lace it
N
Y
May
b
e BCM3
553 h
as p
ro
b
lems
- 32 -
HDMI Audio Trouble Shooting
Check v ideo output
Foll ow pr oc edure  All s ourc e audio  
trouble  shooti ng 
Y
Foll ow pr oc edure  HDMI video 
trouble  shooti ng
N
N
Maybe BCM3553 audio blo ck h as 
problems. Rep lace it
Check EDID N VRAM (IC700, 603, 604)
Power &  I2C Sig nal (#5, #6)
Replace it o r red ownlo ad
Y
N
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