A5S Err. MAXTEMP: BED help..

wolle

Hello all here.

My name is Wolfgang and I´m from Germany. I need your help.

I bought an unused A5S over Ebay in Germany. After I started the printer it was not possible to move the bed or extruder over the move function. Also leveling didn´t work. Only a small move of the bed and the extruder then nothing. As first solution I decided to upload the new firmeware to the printer. Tested the original and the custom one.

In both cases I got this error message. I checked all cables and can´t see any damages.

Need your help...please

Samuel Pinches

This most likely means there is a short circuit on the wiring for the bed thermistor. If you unplug the bed thermistor plug from the motherboard, you should then get a mintemp error instead -- this would confirm the motherboard is ok.

wolle

Hi Samuel. 

Thanks for your reply. I will test it. So you mean I have to remove the cable from the heat 

Samuel Pinches

Try to unplug the bed thermistor cable first (the two pin purple plug) from the motherboard, and then see if you get a min temp error then (negative temperature, will show around -15C) . If so, then there is certainly a short circuit in the wiring for the bed, or a short circuit in the bed itself.

wolle

Thanks again. Will try later. Do you know if a bed from an A5 is compatible? I have one with mechanical issues. 

Samuel Pinches

Yes, it is compatible.

wolle

@Samuel Pinches I removed the purple cable only but the same error😞

Samuel Pinches

Oh dear... that probably means the motherboard bed temperature input is damaged 😔

wolle

Thanks for your help. It looks like it’s not possible to by the board anymore. Then I will try to reactivate my A5 with the mechanical parts from the A5s

Samuel Pinches

Maybe try to contact JGAurora directly? https://jgaurorawiki.com/contact-jgaurora

wolle

I will try at jg directly