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Circuit board cleaner?

Discussion in 'Solid State' started by PAUL Camden, Dec 7, 2018.

  1. PAUL Camden

    PAUL Camden Member

    Messages:
    82
    What kind of cleaner solution would a guy use to wash down solid state circuit boards?
    I have an amp I want to clean up that has a lot of dusty gunk on the inside.

    Thanks
     

     

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  2. Jeff449

    Jeff449 AK Subscriber Subscriber

    Messages:
    194
    Location:
    Silver Spring, MD
    I use 90% isopropyl alcohol and a brush. You can use an old toothbrush if you don't have one made for electronics.
    Deoxit works too, but is expensive.
     
    Bill Ferris likes this.
  3. richs8778

    richs8778 New Member

    Messages:
    31
    Location:
    lincoln ne.
    i just carefully give it a good bath with small paint brush & hot soapy water , rinse & set out in the sun to dry. then clean the controls with deoxit , probably have to pull the front panel off & give a good wipe down with glass cleaner. never had a problem.
     
  4. Marine0811

    Marine0811 I love it loud! Subscriber

    Try a dry toothbrush first. Just go easy. Most dirt and dust will come off dry
     
  5. PAUL Camden

    PAUL Camden Member

    Messages:
    82
    Just ordered some wd 40 electronic cleaner. 6.50 a can, may try to rinse with some hot water in a squirt bottle.
    its a pioneer spec 4 amp and the boards come out pretty easy. I will see if the wd 40 loosens the grime. May try some
    hot water and dawn detergent. looks like this thing was in a nicotine environment.
    Everything gets sticky then the dust fuses to it.
     
  6. jheu02

    jheu02 AK Subscriber Subscriber

    Messages:
    3,162
    Location:
    North Carolina
    Simple green is also good when really gunked-up.
     
    Bill Ferris likes this.

     

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  7. merlynski

    merlynski Curmudgeon Electronicist Subscriber

    Messages:
    548
    Location:
    High Plains, Eastern Colorado
    Don't use WD40, it is not intended to be an electronics cleaner, it removes water, lubricates and leaves a residue.

    Here is how I did it with a really filthy SX-780.
    Remove wood covers and other likely to be damaged-by-water parts.
    Take chassis or boards outside, and set on hard surface so liquids can drain away.
    Saturate with Simple Green and let it soak for a while.
    Rinse it with water, you can brush with a soft brush if needed. Be careful not to flood it, just rinse and drain.
    Repeat Simple Green and rinse/brush treatment if needed.
    Blow away water with compressed air or similar, gently, don't blast it real hard, it is not necessary.
    Rinse down well with isopropol (99%) or denatured alcohol to remove the last of the water.
    Blow dry gently again.
    If it has a receiver with mechanical tuning capacitor rinse the fins with a non-residue electronic cleaner.
    Let it sit in a warm place overnight, to finish drying and alcohol evaporation, A warm incandescent light bulb and/or fan helps.
    Deoxit switches and controls with appropriate type.

    SX-780 before clean:
    DSCF0605.JPG DSCF0615.JPG

    SX-780 after clean:

    DSCF0630.JPG
     
  8. patra710

    patra710 Active Member

    Messages:
    233
    Location:
    Beecher, IL
    I use a shop-vac and duct tape a small hose to the one of the attachments, like a fish tank hose. Then use windex or simple green with a acid brush and scrub down the board staying away from the pots and coils. Get it nice and wet. Then vacuum it off. I do this a couple of times. Then let dry. I do use different size hoses so some will fit over caps and transistors and smaller ones to get into tight spots. Works great to get the 1970's party smells out of them.
     
    dlucy and merlynski like this.
  9. Watthour

    Watthour Electron Rancher - JS3600

  10. mkane

    mkane AK Subscriber Subscriber

    Messages:
    6,388
    Location:
    103 miles N. of S.F.
    ultra sonic bath
     
  11. Hipocrates

    Hipocrates Anti-Muppet Subscriber

    Messages:
    1,797
    Location:
    Costa Rica
    man that's some nice grime, courtsy of WD40 + dust+smoke I guess?
     

     

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  12. merlynski

    merlynski Curmudgeon Electronicist Subscriber

    Messages:
    548
    Location:
    High Plains, Eastern Colorado
    Yup, it was my shop music stereo for over 10 years, where I worked on motorcycles, trucks, cars, etc.: Wrenching, cleaning, grinding, cutting, welding , painting, exhaust fumes, wood stove smoke, Colorado wind-blown dust and grass fire smoke, mice and cats wandering around, a dog or two, an occasional bird flying by, just the usual shop residue.
     
    mkane and avionic like this.
  13. Hipocrates

    Hipocrates Anti-Muppet Subscriber

    Messages:
    1,797
    Location:
    Costa Rica
    Awesome!
     
  14. redk9258

    redk9258 AK Subscriber Subscriber

    Messages:
    1,594
    Location:
    Illinois, close to St. Louis.
    Deoxit is for controls, not circuit boards.

    WD40 sells different formulas now. They have a non residue cleaner. Of course keep the original WD40 away from electronics!
    https://www.wd40specialist.com/products/contact-cleaner/
     
    PooreBoy and merlynski like this.
  15. jheu02

    jheu02 AK Subscriber Subscriber

    Messages:
    3,162
    Location:
    North Carolina
    You SX-780 ws even worse than my Ugly Betty Kendwood Basic M-1...

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
    dlucy likes this.
  16. Tim D

    Tim D AK Subscriber Subscriber

    Messages:
    1,412
    Location:
    Melbourne, FL

    Poster was not talking about the basic WD-40. He was talking about this....

    product-electrical-contact.png
     

     

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  17. savatage1973

    savatage1973 Addicted Member

    Messages:
    6,384
    Location:
    NW Pennsylvania snow belt
    Sorry, I can't track down the pics (or even remember if I kept them), but a few years back I bought a couple Carver PM 1.5 (fan cooled pro amps) that had been used by a band that specialized in "barn dances"--as in being held in actual barns full of hay. Filters got clogged, so they pulled them--didn't replace them--just pulled them. You should have seen what was inside.
     
  18. PAUL Camden

    PAUL Camden Member

    Messages:
    82
    Im not talking about regular wd 40. they make a electrical contact cleaner like deoxit
     
    Last edited: Dec 8, 2018
  19. PAUL Camden

    PAUL Camden Member

    Messages:
    82
    right
     
  20. PAUL Camden

    PAUL Camden Member

    Messages:
    82
    Actually simple green works good on nicotine
     

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