Sanguinololu Rev 1.3a, MINTEMP on boot

[john]

Sorry, I don't know what's wrong to your board from these pictures.
Please contact with our custom sevice and ask them for a replacement of Sanguinololu.

[darraughbj]

Thank you for your help, I have contacted them via the form on the "Contact Us" web site.

[john]

It may be quick if you tell us where you purchased it and your order number.

[darraughbj]

I purchased the kit from Amazon, Order: 106-6565273-1087461

[XYZM]

Interesting. I am having the same exact problem with the GT2560 board.

I bought off ebay. Could it be the hotend that is bad?

[zhangxueyou]

Interesting. I am having the same exact problem with the GT2560 board.

I bought off ebay. Could it be the hotend that is bad?

When LCD displays "min error" , you should check if thermistor is well connected or connected to wrong slot. If it is well connected but LCD still displays "min error", you should use a multimeter to check if thermistor is open circuit.

[XYZM]

I used a multimeter to test for continuity, and there is no beep. I did this with the printer on and with the printer just connected to usb.

[zhangxueyou]

I used a multimeter to test for continuity, and there is no beep. I did this with the printer on and with the printer just connected to usb.

I don't know if we use same type of multimeter, when I use multimeter to check if cricuit is open, there will be beep if cricuit is normal.
So you should check resistance of thermistor, it is about 100k ohm when the temperature is 25°C.
You can test it with printer turned off.

[XYZM]

I tested ohms and got around 80, also tested voltage to be 4.7 or so

[zhangxueyou]

I tested ohms and got around 80, also tested voltage to be 4.7 or so

What is LCD displayin when you plug other thermistor?