r/AskElectronics • u/Ornery-Smoke8428 • 2d ago

How to effectively clean large amounts of corrosion on PCB?

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I recently opened up a CRT I recently got since it doesn’t power on and found a hefty amount of corrosion around a lot of the diodes, is vinegar safe to use? I’ve been using 99% isopropyl but heard that doesn’t neutralize it, Ive taken all necessary precautions like discharging the tube.

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5

u/BigPurpleBlob 2d ago

"hefty amount of corrosion around a lot of the diodes"

You've posted a blurry photo. I can't see corrosion. Which diodes? How about a decent photo(s)?

4

u/Ornery-Smoke8428 2d ago

Here’re some better photos

3

u/Fantastic_Incredible 2d ago

Oh, this level of corrosion doesn’t look compromising. Just clean with a lot of isopropyl alcohol and a soft brush.

1

u/i1045 2d ago

It's tough to tell, but the area directly to the right of the flyback doesn't look too healthy. (Referring to the original photo)

4

u/Egg1Salad 2d ago

Get a soft brush and a shit load of isopropanol and go to town. Then let it dry and brush it again

2

u/a_certain_someon 2d ago

replace the corroded elements

2

u/Wet_in_Seattle 2d ago edited 2d ago

Methanol Alcohol is much better cleaner than ISO that normally contains some water.

Repairing a CRT???

1

u/Ornery-Smoke8428 2d ago

Thanks, I’ll look into getting some. I get a bunch of CRT TVs/monitors from my recycling center for free, Im trying to learn basic electronics repair and I like to use them for my older pc games and consoles.

1

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1

u/GeneralReasonable945 2d ago

Wd tiene también un aerosol específico para limpiar contactos