Read LG 42LG50FD (CHASSIS:LJ82A) Service Manual online
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Component / RGB / AV Audio Trouble Shooting
Check v ideo output
Foll ow pr oc edure
external input video
trouble shooti ng
N
Check Connector
JK700 / JK702 (Compone nt)
JK70 3 (RGB)
JK70 1 / JK707 & cab le ( Rear,
Side)
Replace connector
N
Check sig nal
C734 / R746 / C735 / R752
(Compone nt1)
C736 / R748 / C737 / R756
(Compone nt2)
C733 / R761 / C732 / R762 (RGB)
C701 / R737 / C700 / R738 (AV Rear)
C729 / R733 / C728 / R795 (AV Side)
Replace it
N
Check IC50 0 power L512 voltag e
lev el 9V
Replace it
N
Check sig nal
R532 / R533 / C555 / R568 / C563 /
R582
Replace it o r IC500
N
Check IC50 3 power L513 voltag e
lev el 9V
Replace it
N
Check sig nal
C554 / R569 / R581 / C562
Replace it o r IC503
N
Check IC50 2 power L514 voltag e
level 3.3V & L 515 voltag e lev el 5V
Replace it
N
Check IC50 2 power L514 voltag e
level 3.3V & L 515 voltag e lev el 5V
Replace it
N
Check I2S sig nal
R548 / R549 / R550
Replace it o r IC502
N
Check A udio clo ck
R134
Replace it
N
Maybe BCM3553 has p roblems
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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