Hi there,
I hope you excuse my ignorance.
A friend of mine installed a heated bed for me some time back but now the temperature on the bed will only rise as soon as I turn my ultimaker on. I'm still a noob with electronics and my friend is not around any more. It was also nearly the price of a new machine to have it fixed locally. So I'm stuck trying understand whats causing this.
The problem first started when I noticed the amps read-out on the power supply started dropping to approximately 2amps and back up to around14amps when it powers the heated bed. Then it stayed at around 2 powering everything but the bed. I have a 19volt power supply, but dial it to use around 17volts.
So I checked around the wiring, and under the arduino board I found this wire disconnected from, what looked like the 2 connectors, or should it have only connected with 1? I soldered it back to the 2 connectors, as seen in the first image.
This image shows the other side. See the heat marks around the wires on the board? Does that look damaged?
The small thing burnt out in this image. I replace it but they heat up very quickly still to dangerous levels.
So I replaced the burnt thing (sorry:), reconnected the wire, all looks good but the bed starts heating without setting it to do so and the things in the last image still over heat. I'm guessing the board is damage, but I really don't have any idea. Any help would be greatly appreciated.
Thanks,
Jamie