Smoothie thermistor input T1 bad?

Controllers Smoothie
1

My printer got done running a 15-16 hour job and after setting turned off for a few hours I turned it back on to start another but my T1 thermistor is reading 644-691. I thought my thermistor went bad so I was going to swap it out but then decided to just use the other extruder instead so I unplugged the T1 thermistor and turned the smoothie back on and it is still reading those numbers. I checked the others and when unplugged the others read 999 as they usually do when there is nothing plugged into them.

I flashed the firmware again to see if that would fix. Nope. Checking the voltage across the pins and reads 0.00v, the others read 3.27v.

Imported from wikidot

2

OOPS Sorry not T1, I meant T2.

3

Can you try using another thermistor input instead ?

It *sounds* like something ( short, EMI, electrostatic short ) killed your thermistor input unfortunately.

4

Yep its dead. All the others work fine so I moved it to another input. Is there a way to replace the part that is bad by desoldering and installing a new one?

5

It’s very likely the damage is inside the microcontroller.
This is one reason why Smoothieboard has extra thermistor inputs, mosfets and endstop inputs, makes damage much less important if it’s only on one thing.