Question about Sharp R-1502 Microwave Oven

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Plastic start button broken and start feature on board failed

I have a 5 year old Sharp R-1502 OTR that the start button failed. I took off the cover and discovered that the start button has broken away from the plastic frame that holds it in.

Also I discovered that on the start “square” on the board (circuit board?) does not work. All others appear to be working fine.

Are there replacement cover and board available? I do have photos of the parts mentioned above.


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You have to be sure the door switch connector is plugged into the board or it will not Start.

We have the service / repair manual for this model and have uploaded it to our site here to help you.

It will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.

You will need the
free Acrobat Reader to view or print it in case you don't have it already.

You can order a new and improved select button assembly here.

Other parts can be ordered from Encompass (formerly Tritronics). Or you can call them toll-free at 866-779-5835.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller

Posted on Mar 06, 2009


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They have no battery that I'am aware of, the problem is in the keypad control board. The long storage tends to cause issues if the parts have not been energized for a long time, capacitors start to deform overtime and they are the most likely to fail.

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I've had mine for approx. 5 years and this year the buttons started to not work. I could only use the One Minute Plus button. This morning nothing worked! I unplugged it, replugged it and still nothing....

On these models, each of the four plastic buttons on the right side of the control panel runs a hidden pad on the membrane keypad.

The other pads on the keypad are fully exposed once you open the door and you just press them directly to operate them.

These plastic button assemblies have been upgraded due to weakness and breakage.

Most often it's the bottom two buttons (Stop/Clear and Start/Minute Plus) that fail.

You can order the button assemblies here.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The service manuals you need to refer to are here and here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 01, 2010 | Sharp R-1502 Microwave Oven

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Microwave Sharp carousel model R-1440 appears to have had the child-proof lock feature accidentally activated--every time a button is touch on the face board, "lock" is displayed. As this unit is ~15 years...

I would expect that you have a shorting membrane keypad.

The original part number for the plastic frame with keypad was FPNLCB074MRK0 but it is no longer available.

The oven will have to be retired.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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Hi, I'm looking for the right cover for a sharp R-1501. It covers the 4 buttons on the right and is plastic. I'm also looking for the door button and spring. These are white in color. Thanks.

A lot of times these would warp from heat.

All of those parts once came as an assembly, which was formerly part number FPNLCB373MRK0 and then FPNLCB431MRK0 ("zero" on the end, not "oh") but both are now no longer available from suppliers.

If you think you can get by with just a door open button and spring, the part numbers for them are JBTN-B143MRF0A and MSPRTA050WRE0, respectively.

You can order them from Encompass here or you can call them toll-free at 866-779-5835.

Otherwise, the oven would have to be retired.

We're happy to help you with free advice and (hoping you don't kill the messenger) we'd appreciate your thoughtful rating of our answer.

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I had this problem too:
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After being plugged in for about 15 to 30 minutes,
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Note that when it's flashing 88:88 you are supposed to _start_ with the 'Stop/Clear' button. After that, set the clock (press "Clock", enter the time with the number pad, then press Clock again).

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Either your magnetron, cooling fan, or the magnetron thermostat is failing.

Since it's less than one year old, it would be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

Amana / Whirlpool customer service is here.

Please contact them to find your nearest authorized service center.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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