I'm not familiar with your model or unit, but there are safety interlocks on
every microwave to assure the door is properly shut to prevent radiation
leakage. These usually come in two flavors, a normally open microswitch
that gets closed to "make" the connection to power the magnetron, and a
second normally closed microswitch that is normally shorted across the
magnetron and opens when the door is shut.

These two switches work in combination and if all works properly, the short
is removed and the power is then applied. In your case, I'd look at the
switch and the alignment to make sure the one that opens is in fact opening
properly. Sounds to me like it may have been jarred and is no longer aligned
properly so stays closed creating the short and blowing your breaker (most
units I've seen have a 15A slow blow fuse that goes first before the
receptacle breaker).

Good luck and hope this is helpful.

Bob

"Pat" wrote in message
news:a9omd.617800$8_6.3758@attbi_s04...
My Sharp convection microwave (model R-9H66) trips the circuit breaker
everytime it's turned on. It started doing this after its door was
slammed
shut by someone. It's obviously shorting somewhere when turned on, and
I
took the outer housing off to look at the wiring to see if there was
anything obvious,but didn't notice anything.

Does anyone have any idea what might be wrong or what to look for? It was
a
fairly expensive unit when I bought it 6 years ago, and I'd hate to just
through it away, especially if it turns out to be something relatively
easy
to repair.

Thanks for any help. I appreciate it.

Pat