Purchased a dual from the 5 and dime with the same blown fuse issue. However, this dual would not spin after fuse replacement. The strobe light illuminated. Dissected it and found 2 caps on the power/speed supply. Replaced the small one first. Nada. Replaced the big one second. Bingo. Regarding yours, maybe remove the belt and see how long the motor will spin before blowing the fuse? If the fuses does not blow, maybe a bearing issue?
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