Prusa i3 pro b not working

[aaron_515]

Hi,

Just finished assembling my printer, plugged into the mains and both fans automatically turn on and so did the lcd screen. I then installed the correct driver and plugged the USB into the computer which resulted in a burning smell and the usb Cable getting extremely hot.

I turned everything off and when turned back on, the LCD no longer turns on and the computer no longer recognises the printer.

Please advise,

Thanks.

[_kaktus_]

The printer electronics are suitable for sending to the service. (controller module + display module).
Did you check if the usb port on your computer is working?

[aaron_515]

Apologies for the late reply on this one - I have been waiting for a replacement board from Geetech which came today...

Exactly the same problem again, except this time I was quicker to unplug the USB before getting too hot. The USB socket on my computer appears to be working fine? I unplugged another device (which was working) in order for me to free up the USB.

Any ideas?

[William]

Have you tried to use another USB cable?

[aaron_515]

Hi.

Yes, used other usb cables with the same outcome.

Now trying to get the printer to work stand alone to my pc but no motors work at all. Checking the voltage on the drivers I get maximum of 0.5v and any additional adjustments results in the voltage dropping back to 0. This is the same for all 4 drivers

[William]

Could you upload some pictures of the issue?
(Mainboard wiring;
info of Pc device manager )

USB串口.png (2.33 KiB) Viewed 8896 times

[_kaktus_]

I think you should check if the voltage from the printer's power supply (5v after linear stabilizer or step down converter) enters the power pin of the USB cable.
You can do this test with a continuity meter.

If so, this is the cause of continuous faults.