LG 32LG50D (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
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
- 30 -
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
- 31 -
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
USB T r ouble Shooting
Check USB 2. 0 Cable
Check L 205 voltag e level 5V
Y
N
Replace it o r IC202
Check P20 1
Replace it
Y
N
Check USB D evice
If de vice is 2.5 inch HDD, check po wer
adapto r
Y
Maybe BCM3553 has p roblems
Y
• Excep tio n
- USB p ower could be disabled by inrus hing curre nt
- In t his case, remo ve the dev ice and try to reboot the TV (AC po wer off/on)
- 32 -
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