I just got an SC504 and it's blowing the .3A fuse. Presumably this goes to
the HV circuit as the vertical attenuator, trigger (based on perfromancs of
the trigger and power indicator LED) and calibrator work just fine. I have
no way to test the horizontal amp. I have a bad feeling about the HV
supply. I found a calibration procedure and parts list on Logsa, but no
service manual. Does anyone have a schematic of the HV supply?