Paul wrote:

Our Sharo R-1471 over-the-range microwave (about 10 years old) quit working.
The interior light and fan stay on continuously, and there is no response to
most of the front panel buttons. The Sharp web site had no indication that
parts/manuals were available directly from them. Is it possible to get a
service manual, or at least a schematic for this unit? How about parts
availability? I took the control panel out and found no obvious damage.
Tracing back from the 2 larger relays on the bottom edge of the board, it
seems that Q27 is open. Marking on the part is "A223" Does that stand for
2SA223, or is it a house number?

Thanks,
Paul

My first suspicion would be the interlock mechanism. You can check the
interlock switches with a multimeter.

Probably is 2SA223, the 2S is routinely left off.


NT