Re: TV LG 50PA4500 Plasma : bad image noisy

Hello,

Finally after reflexion, I found how to measure Vy and Vsc and Vzb, everything seems ok. So I don't have any idea of what check now to find the origin of these very dark colors.

Re: TV LG 50PA4500 Plasma : bad image noisy

Hello R_J,

Thank you for your answer. Ramp_up & Ramp_dn signals were at their best value but indeed Vy value was wrong. Unfortunately even by moving it at his maximum, the image is going better but never good enough, far from that.

I will resend the Yboard just reconditioned to have a new one and will keep you in tuch.

Thank you again !

Hello everyone,

I have an issue and didn't find any solution by myself or on every forum about my LG plasma TV 50PA4500.

Originaly the TV stopped to work and didn't want to turn ON again.

After visual inspection, few transistors were broken, I tried to change them but some burned again, so I ordered on full new board. So, I changed the Yboard which was burned by a new one

It now turns ON and the image and sound are present. But the image is very noisy and only visible when the room is in the dark.

I check Vs and Va voltages...

Re: New Members - please post your introductions here

Hello,

My name is Guillaume and I'm an electronical engineer. I wish to help and get help to on this forum which seems to be a piece of hevean for electronical passionate