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sandblasting a PCB?
unix4hire:
I sent my faulty pacman PCB to twobits.com for analysis and was informed it had quite a bit of corrosion. They said the could fix it for $111 by sandblasting it.
First off, is sandblasting a somewhat standard procedure to fix corrision problems on PCBs?
Second, is that a good price? THey said they would run it for 24 hours after fixing it before sending it back to me, which sounded like a good idea.
I figure, for $111 I could have a fully working pacman cabinet (free gift from a church) and you can't really beat that.
--Erich
tommy:
If they say they could sandblast a pcb to make it work, thats news to me let me know how it goes :o
Trimoor:
I would suggest solvents. I played around with a answering machine PCB that suffered severe water damage, and found that acetone and alcohol will dissolve nearly all of the corrosive salts. I never tested it (it having previously suffered severe physical damage from me), but it looked fine.
Sandblasting will probably work, but it will remove the silk screen, and you would probably need to reflow all of the solder joints.
Grauwulf:
Actually, bead blasting is a prtty common practice used to clean up the battery corrosion on damaged pinball MPU boards. Yes it takes off the silkscreen, but you are pretty much assured that all of the corrosion wil be removed. As long as the person knows what they re doing, it is a very fast an d effective way to go about it. I have used chemical washes (50/50 mix of water and white vinigar) and then sanding to remove corrosion on MPU boards and it's not as effective as bead blasting.
paigeoliver:
Too bad you already sent your board off, you could have sold it on the bay nonworking for close to $100 and simply bought one of the jamma ones for $95.
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