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  1. #1

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    cleaning contacts in mfd

    I have my oval mfd cut apart and in the process of cleaning the contacts. I'm using rubbing alcohol and not sure if it is good enough cleaner. Also, do you clean the the part of the lcd that contacts the circuit board? It's not metallic, some other material & don't want to screw it up.


  2. #2
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    I used contact cleaner, and I didn't mess with the rubber deal on the lcd. You can attach the board and plug it in without sealing it up to see if you cleaned it well enough. I had to do that a couple of time to get it right. Then I found I had a bad mode switch. But the display was beautiful!

  3. #3

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    I cleaned it & plugged it back in & presto! It works! Should I use dielectric grease on board contacts before sealing it back up? Thanks

  4. #4
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Quote Originally Posted by stuby View Post
    I cleaned it & plugged it back in & presto! It works! Should I use dielectric grease on board contacts before sealing it back up? Thanks
    I was afraid to. I was thinking the grease would make its way into the connection and mess up the display again.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Arrow Dielectric grease is an insulator, not an electrical contact enhancer

    Quote Originally Posted by stuby View Post
    ...Should I use dielectric grease on board contacts before sealing it back up?...
    NO

    Dielectric grease is an insulator, not an electrical contact enhancer.


    Do not contaminate the interior of the MFD with anything.

    Dielectric grease is for protecting exposed electrical connections from possible degradation caused by air and/or water after the connection is established (assembled and tightened).

    Inserting dielectric grease inside an electrical connection means that only those small spots that manage to poke through the grease will actually make electrical contact. Sometimes this is OK, other times it prevents proper contact.

    The main problem is with connections that have a low contact pressure (low clamping force) between the metal surfaces. If the pressure is not enough to force the grease out from between the metal surfaces, the electrical contact will be poor.

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