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January 24, 2020
How do i open the display board JMC8127DDS
To put the circuit board that i bought from partselect in.
For model number JMC8127DDS
Hello and thank you for writing.
To replace the touchpad and control panel assembly in
your microwave oven first unplug the power cord now use a Phillip's head
screwdriver to unthread the screws securing the grill pull the grill
forward from the top to remove open the oven door and remove the mounting screws securing the control panel lift the
control panel up to detach note the orientation of the wires connected to
the control board then depress the locking tabs if necessary to disconnect
the wires free the hinge tab from the front panel
and remove the screw and washer securing the grounding wire release the ribbon connector remove the two screws securing
the main control board and housing to the control panel depress the retaining tabs and pull the housing out
prepare the new touchpad and control panel assembly for installation by
removing all of the protective coverings now align the control board housing in the new panel and snap it into place thread the screws to secure connect the ribbon connector secured the grounding wire with the screw and washer insert the hinge tab into the front panel and reconnect the
remaining wires to the appropriate terminals on the board insert the control panel tabs into the front panel slots and push the panel down replace the mounting screw to secure realign the grille and snap it into place then rethread the screws to secure with the repair completed plug the power cord back in and your microwave oven should be ready for use. We hope this helps. Please contact us anytime if you require further assistance.
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July 21, 2021
When i heat my oatmeal for 2 minuets then close the door, after about 2 minuets i hear the microwave running again for 2 minuets. It starts up by itself, with nothing inside.Thanks so much for any advise.
For model number JMC8127DDS
Thank you for your question. If your microwave is starting by itself, then there is an issue with one of the door switches and it will need to be replaced. Check to see that the switches are positioned correctly inside the microwave and that the door is completely shut. If the switches are in the correct position and the door is shutting correctly, you will need to test the door switches with a multimeter to see if they have continuity. Before removing the door switches and testing them, unplug the microwave from the electrical outlet. Set your multimeter to the Rx1 setting and ensure that the button is depressed. Touch the terminals with the meter’s probes. You should receive a reading of zero or nearly zero, indicating that there is continuity. Next, with the probes still touching the terminals, ensure the button is not pushed in, this test should indicate that there isn’t continuity.
If your test results differ from those above, you will need a replacement door interlock switch. We hope this helps! If you have any questions, please let us know.
1. I went to the internet to find the service manual for the Maytag microwave. 2. I opened up the oven and started measuring the resistance of the diode, capacitor, transformer, and magnetron between terminals and then to ground. The transformer and magnetron were well within the resistance limits. The diode was shorted in both directions(+-). The capacitor was fully open in both directions -- high resistance. 3. I ordered the 2 parts, installed them, and ran the oven. Worked perfect first time. 4. Reinstalled oven and worked ever since (1 week so far). 5. The secret was that the transformer had a load hum. I figured the transformer was OK. The magnetron had no short between filaments and ground to filaments. The only two left were the diode and capacitor. The first two are about $200 -- almost the value of a new microwave. The $70 repair was well worth it. If the first two were still bad, then tempted to buy a new oven.