BogdanSava

Well it doesn't humm with the shielded cable. I don't think the other cable i had was shielded. I will test again with both cables...

Also I forgot to mention. I would like to upgrade the spring clip terminals, and make a cover for the little board near the power...

I cleaned everything, changed the paste on the NEC AC16D triac and also soldered a lead for ground on the midpoint of C504 C505 and...

Finally found some spare time to play with the Yamaha. I removed the control board 1 and 2 pretty easy, just one screw. Once it was off...