I have a fault with my LG 50 plasma. Sound but no picture. I've substituted ysus board and have full picture and sound so now I know its the Ysus. Checked voltages VSC =120v is ok, but -VY is only 25v instead of -200v.
Theres an add on upriser board with a potentiometer for adjusitng the VY so I've swopped this board but voltage still remains low. I've also replaced ipm's for known working ones.
I'd like to trouble shoot this to component level if I can. Does anyone know what the -vy does and how the voltage is derived?
Ysus pics uploaded -board number 6871 QYH039B
Theres an add on upriser board with a potentiometer for adjusitng the VY so I've swopped this board but voltage still remains low. I've also replaced ipm's for known working ones.
I'd like to trouble shoot this to component level if I can. Does anyone know what the -vy does and how the voltage is derived?
Ysus pics uploaded -board number 6871 QYH039B
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