gbfun
Wholenote
I eat cookies to provide you with the best possible experience.
Posts: 463
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Post by gbfun on Jan 18, 2020 3:33:54 GMT -5
From my growing list of bad ebay deals, I got a device with significant battery corrosion that completely covered a couple of important chips. I got most of it removed, but there is still a lot of it around and under the "feet" of the effects chip and it's shorting out the poor thing so I only get static ! The problem is, how can I safely get the rest of the corrosion out without wrecking anything else ? I really need this device to work well. Thanks !
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Wrnchbndr
Wholenote
Posts: 353
Formerly Known As: WRNCHBNDR
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Post by Wrnchbndr on Jan 18, 2020 11:14:07 GMT -5
When this happens its best to replace the circuit board unless you can replace the traces on the board. With surface mount tiny components its almost impossible to resolve. You can sometimes replace a run with a solid wire but dependability goes out the window. Just measuring basic continuity can be a problem during troubleshooting. A corroded connection may read good on a meter but the current flow of a meter is not the same as the current flow of the circuit in operation. You can end up chasing your tail. Sometimes its best just to let go.
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Post by Peegoo 🏁 on Jan 18, 2020 12:31:02 GMT -5
gbfun, here's how I do it.
I wear a magnifying visor and work under a very bright light. Use a small sewing needle as a little lever to pop the crystalline deposits off the parts.
Do not allow the point of the needle to poke the PC board because if it's a double-sided board, you can lift off or break the copper traces. Work very carefully and slowly. This is like brain surgery.
Nest step is to use vinegar and a soft toothbrush to clean the damaged area. I keep white vinegar in a wash bottle so I can keep the area flooded as I work. A plastic cafeteria tray lined with paper towels makes a great surface to work over.
Rinse well with water and blow it dry with compressed air.
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gbfun
Wholenote
I eat cookies to provide you with the best possible experience.
Posts: 463
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Post by gbfun on Jan 20, 2020 1:38:04 GMT -5
Ok, thanks for replies. Well, I probably should let it go but that's not the way I roll. I tend to keep at it until I totally break stuff ! Its a talent. And while I did a little vinegar and straight pin action before, I'm now donning my surgery smock and gloves and I'm going to get my sewing needles and dig in with zeal and passion ! The device is doomed now...  |
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Wrnchbndr
Wholenote
Posts: 353
Formerly Known As: WRNCHBNDR
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Post by Wrnchbndr on Jan 20, 2020 11:06:48 GMT -5
Been there dude.
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Post by LTB on Jan 23, 2020 18:25:12 GMT -5
I hope it works out for you. Last week when getting my Bicycle cleaned up and ready to ride I took the "bike computer" off to replace the batteries. It was horribly corroded. I cleaned it off but sadly it would not power up.
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