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More on the microwave oven saga

Discussion in 'Electronic Repair' started by Silver Surfer, Apr 8, 2007.

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  1. Ran a little experiment on the GE microwave oven that has been vexing me per
    my postings here a few days ago. As you may recall this GE oven will
    perform flawlessly with its control panel tilted out at about a 45 degree
    angle, but shuts off after only a few seconds with the panel in its normal
    position.

    Happened to notice that the display began to act weird as the board was
    tilted upward to nearly vertical. Got some aluminum foil and cut a piece
    that would fit inside a plastic sandwich bad. Carefully draped this
    "shield" over the control board on the inside of the cabinet where it
    mounts. Tried the oven. Worked perfectly. No more display problems. No
    more shutting off early.

    What do you think the shield is blocking? My intention is to permanently
    mount this shield and resume using the oven.
     
  2. Sounds more like an intermittent connection.
     
  3. JANA

    JANA Guest

    You may have an intermittent connection, and it is somehow moved. Or, there
    may be some radiation leaking, and it is effecting the circuit board when
    the foil is not present.

    If you want to add some shielding, just make sure it is properly insulated.

    --

    JANA
    _____


    Ran a little experiment on the GE microwave oven that has been vexing me per
    my postings here a few days ago. As you may recall this GE oven will
    perform flawlessly with its control panel tilted out at about a 45 degree
    angle, but shuts off after only a few seconds with the panel in its normal
    position.

    Happened to notice that the display began to act weird as the board was
    tilted upward to nearly vertical. Got some aluminum foil and cut a piece
    that would fit inside a plastic sandwich bad. Carefully draped this
    "shield" over the control board on the inside of the cabinet where it
    mounts. Tried the oven. Worked perfectly. No more display problems. No
    more shutting off early.

    What do you think the shield is blocking? My intention is to permanently
    mount this shield and resume using the oven.
     
  4. Chris Jones

    Chris Jones Guest

    You probably ought to check for RF leakage, perhaps microwaves are leaking
    into the casing of the oven. (and if they are getting into the casing then
    this increases the chances that microwaves would be leaking into the room
    as well.)

    If you don't have a leakage detector, perhaps a local repair shop would test
    it for leakage.

    Chris
     
  5. Simoc

    Simoc Guest

    Rather repair/have repaired the leakage. Check that the magnetron is
    properly mounted. However, if you measure the leakage to be in
    "normal" acceptable range and it can't be easily reduced more, then
    the controller circuitry might just be too sensitive. Then you can use
    the shielding, but make sure it won't cause shorts!
     
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