Geeetech

Hey,

from one print to another, my heatbed does not heat anymore. :/ I messured the voltage at the powercord and there is no 24v coming in. I opened up the printer and found this heatbed board. It has 24v coming in from the power supply (working) and it recieves 24v from the mainboard, when I set the bed temperature (also working). The red LED turns on. When I heat the bed with a fan, the temperature sensor reports a higher temperature, so everything seems fine here as well.
But there is no outgoing 24v to the bed. Any ideas?

Hi, Are you referring to the fact that the heated bed itself cannot be heated?
You can check the temperature indicator by unplugging the hot-bed wire from the motherboard.
If -14 is displayed, measure the thermistor on the hot bed.

William wrote: ↑

Wed Jan 22, 2020 9:54 am

Hi, Are you referring to the fact that the heated bed itself cannot be heated?

Yes

William wrote: ↑

Wed Jan 22, 2020 9:54 am

You can check the temperature indicator by unplugging the hot-bed wire from the motherboard.
If -14 is displayed, measure the thermistor on the hot bed.

It does say -14. How would I measure the thermistor?

regards

Hi,you can measure the thermistor of the hot bed, generally about 80kΩ at 25 °