A10M Bed temperature

[Trust35]

Hi! The display of bed temperature is always on 70 degrees and the bed is off,cold.I can't set the temperature on 60,for example. Why? Thank you very much!

[William]

Hi，is it impossible to heat? What is the temperature of the hotbed when not heating?

[Trust35]

Hi!
Th temperature of hotend is ok. I put new termistor.Maybe is 5 degrees higher.But i can control it.
p.s is it possible to heat but only if a set the temperature at 72 degrees (on display 70/72).And the heat goes to max.

[William]

Hi, you should check the connection. May be caused by poor contact.
and then,you can Unplug the cable of the extruder.
If the extruder shows a temperature of -14°C, the motherboard is good. If not, the motherboard is broken.
You can also use a multimeter to test the continuity of the cable to see if the cable is damaged.

[Trust35]

Hi!
Yes. If i unplugged the termistor the temperature is -14.But the problem is not the extruder temperature. The problem is the BED temperature. On display is always 70 or 71. If i unplugged the cable ob motherboard notjng changes. See the picture in attachment. Thank you

IMG_20200601_120323 (768 x 1024).jpg (172.78 KiB) Viewed 7172 times

IMG_20200601_120323 (768 x 1024).jpg (172.78 KiB) Viewed 7172 times

[Trust35]

Nothing happens if i unplugged the cable.

[William]

Hi，if it is a hotbed problem, you can unplug the connection between the hotbed and the motherboard to see if the hotbed shows -14 ℃, if it shows, the motherboard is good.
Then it may be caused by the opening of the thermal bed thermistor. You can measure whether the resistance of the thermistor is about 80-120 kilohms, or the line of the thermal bed is broken.

[Trust35]

Hi!
If i unplugged the termistor the temperature on display is always 70.

[William]

Hi，the motherboard is broken, you need to replace it.
You can contact the salesperson on the purchase platform