Traynor YCV40 slowly rising power
Hi!
I have this Traynor YCV40 on the bench. The problem is that the high voltage is not reaching adequate voltage. Also voltage A-B or C don't change when switching the standby. Being not familiar with this power supply topology and all the switching, I'd like some help to understand better what is going on and have a better idea on what to troubleshoot first. Also, since it is a time consuming type of amp to work on, I'd like to get to the point without having to connect and disconnect over and over.
I get like 275V at voltage A with no tubes, and around 67V with tubes. I did try with known good tubes also, so I know it is not the tubes. I guess the voltage drop is just because there is just not significant amount of current in the circuit. Otherwise, I get about 440V on the right side of D7/D8.