Question about Sharp R-540DK Microwave Oven

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Sharp Microwave Oven Timer Counts Down Very Fast (Demo mode)

I "mis-pressed" the touch screen when entering time/start in my Sharp "Smart & Easy" Model R3H83 (May 1982) microwave. Immediately on entering time/pressing start more carefully, the 90 seconds flashed by in microseconds. Note that when I pressed the touchpad incorrectly, the word "Demo" flashed for a split second on the digital read-out screen. I no longer have the User Guide and cannot find one online. So, somehow it "thinks" it is in a Demo mode . . . can this problem be undone?? Though OLD, it has always worked perfectly; in fact used it several times today.

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  • Tippybird Feb 09, 2009

    One more question, please. When I visited the link you provided above, the web page said that I have no Manuals saved, and for me to search for one. I entered the Model Number (R3H83), but the only hits were for a couple of spare parts for this microwave. Can you tell me what I'm doing wrong? Also, since this microwave is very old, I'm not sure which other models may be similar enough so that searching for a different model number might yield a Manual that provides the fix. Can you provide any other information? Thanks in advance!

  • Tippybird Feb 09, 2009

    Final Rating: 5 Platinum Stars (or whatever!). I was able to find the manual after posting the previous rating and comment (please ignore the earlier rating and comment). I could not believe how easy the fix was . . . via the touchpad, or to simply unplug the microwave (which is what I did). My antique microwave is back to normal, and I could not thank you enough!!!!!

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  • 1,902 Answers

Here is where you can download the manual
http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man

Yes the problem can be undone also.

Posted on Feb 09, 2009

  • Jeremy Reddick
    Jeremy Reddick Feb 09, 2009

    Hello, sorry about not getting back to you right away, Went to bed . I am glad that you got this to work. Have a good day

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