I just bougth a M201 I3 3D printer with GTM32 board. My hotbed is not heating up. I've been following the steps on the this thread. When I measure the voltages in the mosfet (as indicated in the thread) I read 1,1V when not trying to heat it up. When I try to heat it up the mosfet still reads 1,1V.
The hotend does heat up nicely, but I have a different behavior than the one described here. When I measure the mosfet without trying to heat it up it reads 1,1V, when I heat the hotend up the mosfet reads 4,8V.
Also, the thermistor for the hotbed shows 0 degree on the LCD. The thermistor for the hotend works well. I swapped the thermistor's connector on the board and the one connected to the hotbed still shows 0 and the one connected to the hotend shows the right temperature.
Any help welcomed, best regards,
You mean the thermistor for the hotbed showed 0 degree before,and after the swapping it still reads 0 degree(now the port for hotbed connects to the thermistor for hotend)?
If so,your thermistor didn't have a good connection to the connector of the board,that is to say,the thermistor wasn't detected by the board.You should check the board by making the thermistor open circuit and short circuit,refer to the post for GT2560:
http://www.geeetech.com/forum/viewtopic ... 23&t=17030
-Keep your mind and try to test it.
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!