20 Most Recent Sharp R-1502 Microwave Oven Questions & Answers


There is to many parts that can cause no heat, and some are very expensive, plus the voltages in the microwave oven are lethal. I strongly recommend a professional because of safety, and he has the tools and test equipment to get to the bottom of the problem.

Sharp R-1502... | Answered on Mar 27, 2012


We have the owner's manual at our site here, and it contains the installation instructions.

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

Sharp R-1502... | Answered on Dec 28, 2010


It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 on high resistance range for short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.

Sharp R-1502... | Answered on Dec 15, 2010


No need to remove the oven from the wall since the auto touch panel is located behind the door of the oven

Sharp R-1502... | Answered on Nov 05, 2010


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.

Sharp R-1502... | Answered on Oct 02, 2010


When you say that the microwave won't turn on, can I assume that you mean that the food does not heat up! If that is the case, the problem lies with the magnetron circuit. This circuit consists of the transformer, rectifier and the magnetron, the part that generates the microwaves to heat the food. If it is the magenetron, then it probally not worth fixing since the cost to purchase the magnetron is almost as much as a new oven. To diagnose if it is the magnetron that has failed, when you turn on the oven, do you hear a louder that normal hum or buzzing sound? If that is the case, then it means that the magnetron is shorted and needs to be replaced.

Hope this helps.

Sharp R-1502... | Answered on Jun 18, 2010


This is probably a shorted high voltage rectifier diode. See this link:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

We have the service manuals you need and have uploaded them here and here to help you.
You can find links to helpful exploded view diagrams and part ordering help here.
I recommend that you bookmark that link to your favorites.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Sharp R-1502... | Answered on May 06, 2010


on the inside panel or bottom panel there is a fuse in there once you pull the panel you will see it, it is more than surly burned out and needs a new one thats all, but the company dont tell you that because you wont buy aother if you can fix the one you have ffor less than a buck

Sharp R-1502... | Answered on Apr 08, 2010


I had this problem too:
it turns out that it (apparently) just needed some 'warm-up' time!

After being plugged in for about 15 to 30 minutes,
the buttons suddenly "came to life"...

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).

Hope that helps.

Sharp R-1502... | Answered on Feb 15, 2010


We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

FixYa's Web site is currently not notifying us when replies to our Clarification Requests are posted, so please reply back directly to me or see our site for details.

Details of our service are at our Web site, along with a video showing how to remove a typical over the range control panel assembly in under 5 minutes.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Sharp R-1502... | Answered on Oct 06, 2009


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.

Sharp R-1502... | Answered on Sep 28, 2009


We regularly repair such control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) 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, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide


Sharp R-1502... | Answered on Aug 09, 2009


sound like a bad Key pad. contact sharp with modle number and the can tell you what you need.

Sharp R-1502... | Answered on Aug 09, 2009


Sorry, but it's still not clear, yet I can narrow it down.

First I would suggest you check the top & bottom door switches and mounts. (Don't worry about the middle one)

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.

Most computers will open this document automatically, but you may need the free Adobe Reader.

This is usually caused by either a bad door switch, a loose door switch mount (which are pretty simple problems to fix) or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

If it's not the switch or mounts, I would say the contacts of relay RY1 on the control board are shorted.

It's called the oven lamp relay, but it also runs the turntable motor and internal cooling fan when the door is shut.

If you or a friend have soldering skills, you can replace it (of course confirm first that it is shorted).

It's part number RRLY-A113DRE0 (zero on the end, not "oh").

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

If you prefer, we regularly repair such control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) 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, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Sharp R-1502... | Answered on Jun 30, 2009


This could be the breaker at the panel or the fuse inside the microwave.I would check the panel box for any tripped breakers and then the fuse inside the unit.

Sharp R-1502... | Answered on May 03, 2009


there are 2 fuses inmicrowave 1 for ac input 1 for high voltage transformer that will trigger the magnetron "for heating"

remedy;
uncrew the unit
replace fuse near the transformer this fuse.. usually enclose with plastic casing..
then test..


causes of blown fuse
improper ventilation

Sharp R-1502... | Answered on Apr 05, 2009

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