Hello!

Any updates on this issue? I have exactly the same problem.

I've changed R1023 D1023 and D1024 because they were shorted but i still have some arcing in those components.

 

hi Fer,
Welcome to AAC
Created your own New Thread, should improve replies.
E
Old Thread link.
https://forum.allaboutcircuits.com/threads/oscilloscope-repair.105900/#post-828984

@ScottWang