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  • BristolA commented on korostelevm's instructable Fix a fried Arduino Mega10 months ago
    Fix a fried Arduino Mega

    Thanks for the response, but I found a video showing how to check the VR, its definitely cooked. I sent pics to Arduino to see if the board was genuine, but its not, just an excellent copy, right down to the gold chip. I bit the bullet and bought a 100% genuine Arduino, flashed the printer config, and plugged it in. It all worked perfectly.I will see about repairing the Chinese one, as a spare is always handy to have.

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  • BristolA commented on korostelevm's instructable Fix a fried Arduino Mega11 months ago
    Fix a fried Arduino Mega

    My 2650 is used in a 3D printer. A few days ago it decided to run the set up process before each print and then stop dead as soon as it got to the Gcode for the print itself. After replacing all of the plugs and wiring I discovered that if I printed from a stone cold printer, it would print. If I tried to print from a warm printer, eg print two successive items, then it would hang.I have just discovered this article and I am now wondering if it is the VR that is causing the problem. It's either that or a cold solder joint somewhere, but I have been over my 2650 and my Ramps boards with a magnifying glass, nothing visible that looks bad.I am wondering whether I can simply snip off the original VR and solder a new to the old legs that can remain in the board. It would make an awkward job ...see more »My 2650 is used in a 3D printer. A few days ago it decided to run the set up process before each print and then stop dead as soon as it got to the Gcode for the print itself. After replacing all of the plugs and wiring I discovered that if I printed from a stone cold printer, it would print. If I tried to print from a warm printer, eg print two successive items, then it would hang.I have just discovered this article and I am now wondering if it is the VR that is causing the problem. It's either that or a cold solder joint somewhere, but I have been over my 2650 and my Ramps boards with a magnifying glass, nothing visible that looks bad.I am wondering whether I can simply snip off the original VR and solder a new to the old legs that can remain in the board. It would make an awkward job a lot easier. I can get hold of LD1117S50TR's, so if the pinout is correct, would this be the way to go?

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