I screwed up and shorted the middle pin on the “reserved” connection to ground and my controller went dead. C3D does not have any boards in stock so I’m dead in the water unless I can fix the board I have.
It’s a longshot, but I’m thinking there must be a step-down circuit on the board somewhere that supplies 5V to the middle pin of the “reserved” connector. Does anyone have a circuit diagram so I can try to trace the fault? Troubleshooting through-hole circuit boards are tough enough for me, but SMT is another level.
have you contacted support with that specific request ? I don’t think the circuit diagram is publicly available, but support may be able to ask someone who does have access to it and provide enough information to help you.
I described my problem and support sent me a link to the replacement boards. I just sent a request asking for a circuit diagram or other information that may be helpful for troubleshooting the board. Thanks.
While you are waiting for the answer from support, and for what it is worth ( = not much), the circuit diagrams for the ANCIENT “stepoko” board that is the grand-grand-mother of the current v2.4 board, are available here:
Make no assumption that this reflects the implementation of the current board, there are similarities and also differences. Since you asked for circuit diagrams I assume you know you way around them, so you may be able to get a few hints there and match that to your board. I usually refrain from referencing those old/obsolete diagrams, but since your question is about power management, there is a small chance that that specific part may still be similar enough.
Carbide 3D won’t help with a schematic or a regulator manufacturer and part number and new boards are out of stock with no ETA, so I’m on my own with this repair if I want to get back to work. I found what I believe is the failed 5V regulator (marked 93VF L53B) and I’ve ordered a few from DigiKey (LM2940IMP-5.0, $1.56/ea). Fingers crossed!
I have a V2.1 control board (looks like this) I replaced because I was getting static electricity disconnects. Turns out I could have put a big Panasonic capacitor on it and it would have been fine. I bought a couple of the caps from Digikey because I was going to make a large format draw bot, but then lost interest. Not sure if you are interested in it, but if you want it, I would sell it to you for $75.00 since I am not going to be using it. I’ll include the Panasonic caps to solder on as well. You only need one, but I have two, so you’ll get both.
