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Topic: PCB cleaning. (Read 11650 times) previous topic - next topic

mirith



I buy a pack of tooth-brushes from our local pound store every couple of months, as the Acetone does affect them.


I'd be afraid that acetone would also affect components on the boards.


It definitely does, if you've cleaned with acetone, you'll notice a standard FR4 board will turn a little white.  Acetone will dissolve the adhesive that holds the fibgerglass together.  This doesn't count any parts.  IPA is less likely to do this.
Something I vaguely remember from something like 10-12 years ago, but don't know the validity of it, was to clean with warm distilled water, then use IPA to clean off the water, since it will evaporate much faster.

polymorph

Quote
...clean with warm distilled water, then use IPA to clean off the water, since it will evaporate much faster.


In cleaning boards with spills on them like coffee, soda, etc. I may use 409 set to stream with a toothbrush or part cleaning brush, then flush with distilled water, blow out with dry compressed air, then flush with 99% IPA, then blow out again, finally left to dry.

Steve Greenfield AE7HD
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SirNickity

I find it amusing that coffee and soda on your PCBs is a common enough occurrence that you've developed a procedure to deal with it.

polymorph

Well, I've worked on a lot of consumer electronics and arcade games. Remote controls are usually caked with sweat, skin, soda, and coffee, and for a while VCRs came with remotes that were not replaceable with a generic remote, and that cost $90 to replace. TVs occasionally get things spilled inside. And it used to be worth it to repair computer keyboards.

And all kinds of consumer electronics get really grotesque in smoking households. Smoke residue and dust turn into a tarlike substance coating everything.

I've been repairing electronics for a very long time. Now pretty much anything acts up, it gets tossed out and replaced, either because the item itself is cheap, or parts are very expensive. I've seen people giving away really large 3D TVs because the cost for a new screen is not much less than the cost of an entire new replacement TV.
Steve Greenfield AE7HD
Drawing Schematics: tinyurl.com/23mo9pf - tinyurl.com/o97ysyx - https://tinyurl.com/Technote8
Multitasking: forum.arduino.cc/index.php?topic=223286.0
gammon.com.au/blink - gammon.com.au/serial - gammon.com.au/interrupts

JChristensen


...then use IPA to clean off the water, since it will evaporate much faster.


Waste of good India Pale Ale. IMHO.

majenko



...then use IPA to clean off the water, since it will evaporate much faster.


Waste of good India Pale Ale. IMHO.

Agreed.  Use cheap vodka instead!

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