PWM fan Helppppppp

[Mark88]

Hi Guys, I have a problem with my geeetech i3 pro b , gt2560 board the PWM fans will not want to leave, I tried them all .
which I have to modify the firmware section to have any hope for more? If you help me step by step , I'd be very grateful , Thanks a lot .

Greetings

[Toy]

PWM fans will not want to leave, what do you mean by that, it can't run or you can't control it?

[Mark88]

not starting from lcd , repetier , not moving

[Mark88]

not starting from lcd , repetier , not moving

[Bernd]

I have the same Problem Mark88 ! on PWM connector i have a Fan but they don´t work don´t run.
I have modify the firmware too. i can´t control the Fan.
when I turn the plug on PWM Port the Fan runs with 100% but i don´t can control it.
I try everything but don´t work with controls

[William]

Hi,
You guys can connect the JP2 port with a jumper cap,and it may be work.

[Mark88]

Hi guys , I have made the jumper to jp2 , but only increased the speed of the fans , pwm is dead , does not want to light up , I wrote geeetech care , and they told me to measure the voltage of the MOSFET , which to me is irregular , turning on and off by repetier the fan should have on pins 1 and 3 0v is turned off 12v , but I have 1V when it is turned on and 0V when power is off , so I would not want the mosfet is damaged , even misuranto the voltage between the pins of the mosfet and those of the pWM comes to me , Pin1 Pin1 12v , 5v pin 2 pin 2 , pin 3 pin3 5v .
Now I rewrote an email with these values ​​, and we see that they answer me

Greetings

[Mark88]

hi, sorry I was wrong to write , I have a fan on 1v , while off from 0v

[Bernd]

Mhhh i try everythink but i can´t control the Fan with software or hardware... the Fan have allways 100% speed.

what can i try next ?

[Mark88]

Hi Guys , I support the geeetech wrote to me that I have to take off the MOSFET , connect the pin 1 with pin 3 , however, after the fan is no longer controllable .