If you actually have a K7201, and don't see any sparks or obvious big cracks in your flyback, then it is most likely NOT the cause of your blowing fuses. One thing about the 7201 is that it has built in isolation (not needing an isolation transformer). This means that - even if the flyback or HOT were bad - it wouldn't typically cause the fuse to blow at start up because there is no direct connection between these parts and the fuse - unless there was a lot of arcing going on. It would just go into HV shutdown.
In fact, it is quite simple to figure out if your blowing fuse is being caused by the flyback or HOT (if you see no arcing) or by something bad in the PS section. Find L002 (next to the big yellow transformer), unsolder one leg, and pull it out. This will completely separate the deflection section (where the flyback and HOT are) from the PS section (where the fuse is) just in case something is being reverse induced. Put in a new fuse and turn it on. If it blows, then your problem is in your PS section, and you need to start checking the rectifier, the diodes, the transistors, and IC001 in that section. If not, then your problem is in the deflection area, and you should check the HOT first...