I bought this scope earlier this summer as new old stock, never powered on. Due to covid illness I never opened it until a week ago. The scope powered on ,but the trace only covered about 2/3s of the screen and was jumping all over.
After it was warming up only got worse, I decided to check the voltages on the power supply and all were low.
So I did a full recap (caps are still old even though the scope has zero hours) and also replaced the following:
and the ac filter
all 3 rifa x class caps
Same problem still exist
Voltages as follows
resistance to ground;
also the trigger led blinks when the scope is on. I have been reading all the power supply post here and frankly, I'm stumped
This is my first attempt a troubleshooting a switch mode power supply. any and all suggestions would be greatly appreciated
Thanks in advance