OLED65CX5LB PSU Feedback Loop Issues

[Davi.p]

the photo i see around are almost low quality but i surely see no signs of variable voltages in different modes in serigraph

[CiorapulUcigas]

Replaced TL431 and no fix.

[CiorapulUcigas]

I think I found the solution here. I have ordered parts and will find out in the coming days.

[CiorapulUcigas]

I guess we have our guilty parts.

[CiorapulUcigas]

Changing those caps fixed it, but the relay doesn't turn off when the tv turns off.

[thommyX]

Which brand did you use?

[Diah]

if the 12VM go back to 8.5V after you turn off the TV... then every things in good. dont bother.. but if VM remain high 12V.. not good

[CiorapulUcigas]

I have used wurth. The relay turns off most of the time now, but when the tv is off I hear reset clicks on the motherboard.

[Diah]

MB will never make click

[thommyX]

Always check all parts for the power supply. The capacitors usually have loss. LG Thomas

[CiorapulUcigas]

Always check all parts for the power supply. The capacitors usually have loss. LG Thomas

Thank you for this, will have to check all of these out as C601 and C602 were so bad.

The power supply seems to be functioning good so far. I think the relay doesn't turn off some of the times as the panel is doing pixel refresh. After 5-10 minutes I can hear it click off.