Comment on Biqu B1 - Not heating the hotend
papalonian@lemmy.world 3 months agoso which board is defect? The little one in the hotend or the board on the other side of the USB-C cable?
My money is on the main board inside the printer. The “board” on your hotend (if it’s like others) doesn’t really have any computers or controllers on it, it’s more like a fancy cable connector between the main board and those components.
If you test the voltage and get nothing, it’s either the main board or the mosfet for the heater. If you test it and it gives you a stable 24v, the problem lies somewhere between the main board and the heat cartridge (cable, connector, the hotend board, cartridge itself).
UncleStewart@sh.itjust.works 3 months ago
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#3 goes up to a board back on the printer. This board has multiple outlets, and one USB-C that goes up to the hotend.
UncleStewart@sh.itjust.works 3 months ago
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This is the board that has a USB-C on the outside for the hotend
UncleStewart@sh.itjust.works 3 months ago
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The outside view
papalonian@lemmy.world 2 months ago
So that little board is simply connecting all the cables from the main board into one cable (the USB C cable). If you’re getting nothing from the main board, either the board itself or the mosfet for the heater is dying.
Honestly, I don’t know how you’d go about testing board vs mosfet, if it were me I’d just replace the board, but somebody else might be able to tell you if there’s a better route to take