Sharp R-930AK Convection/Microwave Oven Logo
Posted on Mar 25, 2010
Answered by a Fixya Expert

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Microwave turns on but doesn't heat. Turntable does not rotate

R930AK, microwave, internal fuse is good, turntable is very hard to turn with the hand. I ohmed out the motor, 3.2Kohms, where the motor wire is not plugged into the motor, it is 12v, when I plug it to the motor, it goes to 20mV. I assume if it is not rotating, the oven will not heat. Any ideas out there, I have been trying tofid a service manual to download, but can only find one to order.

1 Answer

Benjamin Patri

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  • Master 3,037 Answers
  • Posted on Mar 25, 2010
Benjamin Patri
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Joined: Mar 18, 2008
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The magnetron (the part that heats the food) is probably done, they tend to go out if the fuse didn't blow and it usually isn't worth fixing as the cost of the magnetron is almost what it would cost to buy a new microwave.
Sorry for the bad news.
Benjamin

  • Anonymous Feb 23, 2011

    Now this totally depends on when you bought your unit though.
    Sharp usually has a warranty of 5 years on the magnatron, but it is just for the part, you have to pay the labor.

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5. Test the microwave to make sure that the turntable motor is operating correctly. The Microwave Wizard website explains that the motor can make noises if it was not positioned evenly in the shaft. Reconnect all of the wires that were detached when removing the old motor.

6. Reinstall the microwave's bottom panel parts, and secure all of the screws in place. Reposition the turntable frame in the bottom of the microwave and place the turntable on top of it. Test the microwave in order to make sure that everything is working correctly.


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Most microwaves have different settings that the user can select with the press of a button, like a "Defrost" setting or a "Popcorn" setting. Certain microwaves may stop the turntable from turning during certain pre-programmed selection modes. Stop your microwave and don't use a pre-programmed mode. Instead, just specify the time using the number pads and start your microwave to see if your turntable begins to rotate again.

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* specific microwave information and part number


1 Open the microwave door, and carefully remove the turntable tray. Also, remove the frame that the turntable is positioned on. Both the turntable and the frame are not secured in the oven, so removing them is a quick process.

2 Remove the bottom panel of the microwave. The Microwave Wizard website explains that the number of screws securing the panel varies depending on the manufacturer and specific microwave. Once the bottom panel is loosened, disconnect its wiring harness in order to completely remove the panel.

3 Locate the turntable motor. The Microwave Wizard website explains that the motor compartment should be positioned below the center of the microwave. Unscrew the motor, disconnect the wires, and remove it from the microwave.

4 Determine the specific part number for the turntable motor so that a correct replacement can be purchased or ordered. Position the new motor into the shaft in the bottom of the microwave. Screw the motor securely into place.

5 Test the microwave to make sure that the turntable motor is operating correctly. The Microwave Wizard website explains that the motor can make noises if it was not positioned evenly in the shaft. Reconnect all of the wires that were detached when removing the old motor.

6 Reinstall the microwave's bottom panel parts, and secure all of the screws in place. Reposition the turntable frame in the bottom of the microwave and place the turntable on top of it. Test the microwave in order to make sure that everything is working correctly.

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