Danny,
I am glad that you are back to the forum now.
There should be some reason that Ketron is using the 3 amp fuse in your X1. A fuse is used for protecting your equpment from the upsurge of too much current. If you replace your original fuse with the one with larger capacity, you are effectively eliminating the proctection and may risk further damage of your equipment. My advice is to get an equivalent fuse.
My experience with fuse blowing is usually associated with voltage fluctuation and sometimes fuse blowing is just an indicator that something else in the circuit board has become defective. So, if your case belong to the first situation, then fuse replacement is enough. But after you put in the right fuse and it is blown again then you have to send your equipment to its service center for further check up and repair. For expensive equipment like computers and top of the line keyboards I usually hook up to UPS (uninterrupted power supply) for stable voltage/current supply and power brown/black out - fuse blowing seldom happens with this setup.
Regards,
Paul Ip
from Texas