Read LG 50PB4RT-MA (CHASSIS:PP78B) Service Manual online
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15. In case of becomes unusual display from component1 mode(main/sub)
16. In case of becomes unusual display from component 2 mode(main/sub)
17. In case of becomes unusual display from RGB mode(main/sub)
Is normal video
input of the JK102?
(Check L126, L127,
L128)
Check the input source
Is normal video
input of the JK103?
(Check L129, L130,
L131)
Is normal R, G, B input
and H,V sync of the JK500?
(Check R509, R511, R512
R513, R515)
Check the input source
Check the input source
Change IC(IC700 )
Change IC(IC700 )
Change IC(IC700 )
YES
NO
YES
NO
YES
NO
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