Desoldering tip, use low-melt solder to take those off without hassle. I would replace those fuse holders with new ones "3557-2" from digikey. The fuse melting means it pins were making poor contact. Those block are definitely better than what was there before, but those are rated for 15 amps. they do make 20 amp models that also accept 12g wire & 5mm "2861-EK500V-04P-ND" .
Chris, I had to do a similar repair to my MK2 and choose to solder the Heat bed wire directly to the motherboard. Wish I had thought of using the connector you came up with, great thinking! But what about just dropping the current draw by changing to the 24v heat bed from the MK3? That would require a new Heatbed, and frame support, the power supply and the Nozzle heater. Would that work, can the MiniRambo work on 24Volts?
That's a good question and I want to say that was part of the problem that the Mini Rambo couldn't handle 24v, but I will have to go back and check, because that would pretty much solve all these issues.
You may be able to bend the fuse slots slightly to tighten them up. I have always wished there was more room in the board case, it can be a bit of a struggle to see what you are doing in there.
Great Video. My MK2 has been working great for years - now if only they had silent stepper motors for this board without switching to an aftermarket board. These videos are great because just like having an old car, they will be around for a long time and good to know how to repair them!
@@ChrisRiley won't connect. , can't update, computers can't see it. I can still use it and it is currently working to print. The LED's on the board up near the port.. during testing they were not working.
Good way to extend the life of a still good board. You should put together upgrade kits. I looked at the parts you listed and they came in larger quantities than most people would need. Many of us do things like this and have so many extras when done.
This reminded me of the Melzi board on the old Maker Select V2 (which I still have) and everyone putting mosfets on them (which I did) because of melting connectors. Even after putting a 32 bit board in it I kept the mosfet because why not. The limited space in the control box wouldn't let you go that route unfortunately, so it was cool to see your solution.
