| Electronics > Repair |
| Repairing carbon traces on a Casio WK-110 keyboard PCB? |
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| Agent24:
--- Quote from: VK2AZT on July 25, 2024, 07:53:09 am ---The Jaycar Wire Glue will work. I used it before for almost the same purpose. --- End quote --- Thank you! So you can confirm it will bond to the PCB substrate? |
| VK2AZT:
As long as they haven't changed the formulation of the product, it will adhere to the board. Don't worry if you apply too much as once it starts to dry you can carefully scrape away areas that you don't want. Use a sharp blade like an X-acto or scalpel type blade. I applied the wire glue with a toothpick at first which met with limited success. I had better luck with a fine tip precision flat blade screwdriver. Surface prep is important as usual. Make sure that there is no grease or oils on the board, including skin oils. Leave the dark areas where the original conductive traces were attached. Those are usually primer paints that help the conductive traces adhere. You don't have much time before the wire glue starts to skin so I recommend that you practice on some waste board to become familiar with this product's behavior. Keep the bottle well sealed when you've finished with it and I do recommended keeping it in the fridge. It will harden in no time at all otherwise after you first open it. |
| amyk:
They originally used carbon paint to print those contacts, so the resistance is not going to be a problem - these switches normally go to CMOS inputs and don't need to pass much if any current. |
| JohanH:
I once repaired a Roland D-50 synthesizer and used conductive paint (if I remember correctly, it was some silvery stuff). It worked fine. And yes, resistance shouldn't be a problem, it's just working as a switch with very low current. |
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