Vintage Synth Repair

I check the transformer's primary using a self-made (lopt) inductance tester running at 19KHz. The primary could have shorted turns due to overheating etc., althought usually there is a thermal fuse incorporated inside the transformer as protection that goes o/c. If it blows the main fuse (verify if this is correct) with the secondary disconnected then it is surely bad.

H9000

The psu board could be faulty but I haven't even got that far. Right now just having the transformer connected to the and power switch (with the rest of the synth disconnected) still blows the fuse. The primary checked out. The secondary show something like 3.5 megaohms. That was it. There may very well be more damage further on but as I said, I haven't got that far yet.