Ramps 1.4 Hot-End power always on

Has anyone had the problem of hot-end power fet staying on all the time?
I already replaced the fet to see if it was broken and replaced the heater element to the hotend. Still not working...
There's only one resistor between the gate of the fet and the arduino output and I was wondering if the broken fet could have also damaged the arduino board?
I'll measure the whole RAMPS soon but I was just wondering if you guys have had similar issue before?

Edited 1 time(s). Last edit at 05/16/2013 01:58AM by Big 15.

Dunno what you mean by "staying on all the time"? (as it would if getting ready to print) Do you mean it stays on even if its shut off in Pronterface?

Sort of. The hot end is drawing full current all the time independent of pronterface. So the gate and drain is shorcutted or arduino output is high all the time(broken) or smth else similar. I have to measure the lines when i get time...

There's isn't an inverse configuration for that pin is there?

Perhaps something is shorted out, keeping power to it all the time?

Trying using D9 instead of D10?

Hi Big 15,

Try changing the MOSFET, I once had similar problem and it disappeared when STP55NF06 MOSFETs were changed.

Hope this will solve you problem.

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