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Panosonic Microwave convection Model NN-8501V Touchpad appears dead

I have a NN-8501V unit and all the sudden It will not work at all, like a fuse in the unit blew. (is there one in the unit?)
The outlet is working and when you open the door the light comes on, but the touch pad on the outside is dead, does nothing. Worked fine last week.
Any ideas?
Also need to know where to find a users manual.

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  • 2 more comments 
  • ttcorn Oct 03, 2008

    The website you sent me to for the manual says the manual does not exist for that model.



    No matches can be found for the NN 8501V.

  • ttcorn Oct 03, 2008

    link for manual can not find the manual for this model #.

    Also question about microwave not working was not answered.

  • ttcorn Oct 03, 2008

    Ok so where do I find this ribbon cable you are talking about. This is an installed Microwave in

    my motorhome. Do I get to this from the back.



  • ttcorn Oct 03, 2008

    complete Model # is NN-8501V



    email is ttcorn@yahoo.com

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Hi there,

since the lights are on that means you have power to the microwave.

the only thing that does not work is the keypad.
that could be for one of 2 reasons, the keypad itself is faulty. it's attached to the control board behind it with a ribbon cable, so the cable is the only thing that could be faulty.

the other reason is the control board behind the keypad. the fuse that you are looking for is saudered on the control board, so if the fuse goes, you'll have to replace the control board.

i would start with the keypad first.

if you can provide me with the complete model # and an e-mail address, i will e-mail you the user manual. i only have access to the Panasonic dealer page but it's password protected.

thanks

Posted on Oct 03, 2008

  • Carmen Mikulic Oct 03, 2008

    hi there,



    you will have to pull the microwave out since it's an OTR.



    the ribbon cable is attached to the keypad from the inside of the microwave, which you won't be able to see unless you take the keypad off.



    here is the exploded view and parts breakdown for the better reference.



    http://servicemanuals.panasonic.ca/viewi...



    take a look at this diagram, it will give you a better idea of what you need to do.



    thanks

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There is a fuse inside and if it is busted, i think you would not even have a light.

i'm thinking the system hanged. you can try opening it up, remove the the ribbon cable from the touch pad to the main board. this would reset the touch pad.

after 10 mins, plug it back and see if it will work.

if it will work and the problem would re-occur, the problem is in the main board.

tnx 4 using fixya,

drcool

Posted on Oct 03, 2008

  • francis rivero Oct 03, 2008

    hi ttcorn,

    the ribbon cable is inside the microwave oven. you should bring it down first if it is installed in your motor home.then remove the housing of the microwave and you can see the ribbon, it is a flat thin strip of material that is locked in the main board. there would be a clip that you need to lift before you can remove the strip.

    tnx again,
    drcool


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HI,

Disconnecte power and remove the top of the microwave oven. loosen the touch panel (one screw holding it on the inside - yours may be different). Several wires running to a circuit board on the touch panel: loosen only one wire (a green ground wire) -

The touch panel has two parts: a circuit board screwed to the back of the panel with 2 screws and the touchscreen itself built into the panel. Remove the two screws and the panel (with touchscreen) which will completely free of the circuit board.


Posted on Oct 03, 2008

  • Priya darshan Oct 03, 2008

    Now see what connects the circuit board and the touchscreen - a very
    fine and narrow strip connector. If you look at it with a magnifying
    glass you will see that it is a connector of some sort: it presses into
    a corresponding connector on the circuit board.the connection (which relies on pressure and position) may be worn or loose or dirty over the years possibly due to relentless
    pressing and punching of the panel buttons and the door opening button.




    find a small smudge of material on the connector and remove it
    with your fingernail. Replace the circuit board, be careful to
    position it properly, and tighten the screws, reconnect the green
    ground wire and test the unit.





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The unit has a fuse in the power board, but when the fuse is gone it does not even start up. If it starts it is not the fuse.

Look rather a problem with a faulty touchpad, or the magnetron that is not working and need to be changed.

Check also the door sensor.

Posted on Oct 03, 2008

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