I am stuck again at the power supply level, somebody (sorry I forgot who, it must have been a private message) already told me to unplug the HV valves and start to check the lower DC voltages, a very useful suggestion which I followed.
All the AC voltages are there but the rest doesn't come up right.
the 88V is 31V and the -150 is next to 0
The v31 rectifier works and is anode V goes up to 300
then the fuse blows
In summary what I don't understand from the schematic is if I can unplug components (valves) to check each section separately, or additively until I get to the faulty components because they seem all interconnected. Could anybody help please?
The relevant schematic is
