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50PH4700-SD, 50PH470H-SA (CHASSIS:PB32A) - LG TV Service Manual (repair manual). Page 86

Read LG 50PH4700-SD / 50PH470H-SA (CHASSIS:PB32A) Service Manual online

16. OPTIC Audio Out Trouble Shooting
Ch k Si
l (JK3606 #3 i )
Check SPDIF signal (R3662)
Replace LGE2122 (MTK Main 
IC, IC105)
Y
N
R
l
JK3606
N
Check  Signal (JK3606 , #3 pin)
Y
Maybe LGE2122 (MTK Main IC, 
IC105)
has problems. Replace It.
Replace JK3606
N
has problems. Replace It.
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