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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Sharp Microwave R-1471
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 |
#2
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Sharp Microwave R-1471
"Paul" wrote in message ... 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? Someone slam the door? |
#3
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Sharp Microwave R-1471
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 |
#4
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Sharp Microwave R-1471
wrote in message ups.com... 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 It appears that both of you are correct. The clip holding the upper door switch is broken. I never would have guessed that an interlock switch would have caused the symptoms that I was having. Apparently this particular switch turns on the interior lamp and disables the touchpads when the door is open. Thanks for the help. Paul BTW, according to Tritronics, the full P/N for Q27 is VSKRA223M//-3. |
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