While you wait for answers, we may have found some information which could help you.
Click here for About 10 YearsSharp Microwave oven Model R-330J(S) keypad problem?
is it safe to replace a magnatron in a sharp convection oven ??
sharp R259 800w?
How can I fix my Sharp Carousel Microwave Oven?
My Sharp Carosel Model R-5A98 blows its internal 20 amp fuse. Any idea?
Sharp r-953 stopped working?