i need help with Heatbed MK2a

[gastipincha]

if i need to change the 2 fuses in the board, the ones of 5 ampere and 15 ampere , whic are the caracteristics ?

if i go to these page :
http://www.littelfuse.com/products/fuses.aspx

How do i find them ? pls i need help with these as soon as posible

[gastipincha]

hello
I need To remplace 1 of the fuses in the controler board, the one of 5 AMpere fuse.
ITS A littlefuse one , but i need to know which one is it , so i can buy a similar one andremplace it....

In this page you can look for the fuse , and if u can find it ,would u tell me Which one is it pls ? i need help with this im very frustated , because nathing is working at it should with my NEW printer so pls take a look
http://www.littelfuse.com/products/fuses.aspx

[zhangxueyou]

This one, I think:
http://www.littelfuse.com/products/fuse ... 49005.aspx

[gastipincha]

Hello i have mesured this voltage ... there is no voltage and the corresponding lead is not glowing i think thats the problem , but i dont know how to fix it ...

I have an other problem the Z axis cant move smoothly , it goes up but makes a lot of noice , but does not go down...
please can you help me ? this is its very frustrating
thanks for your time

[gastipincha]

Hello i have mesured the voltage here... there is no voltage and the corresponding lead is not glowing when i put the heat bed to heat. i think thats the problem , but i dont know how to fix it ...
i mesured the resistence of the heat bed too
992Ω 992Ω and 991Ω

I have an other problem, the Z axis cant move smoothly , it goes up but makes a lot of noice , but does not go down...
please can SOMEONE help me ? this is its very frustrating

[Sherry]

Hello i have mesured the voltage here... there is no voltage and the corresponding lead is not glowing when i put the heat bed to heat. i think thats the problem , but i dont know how to fix it ...
i mesured the resistence of the heat bed too
992Ω 992Ω and 991Ω

I have an other problem, the Z axis cant move smoothly , it goes up but makes a lot of noice , but does not go down...
please can SOMEONE help me ? this is its very frustrating

hi,the normal range of MK2A is 1-2Ω.if you measure the resistance in acorrect way,it's obvious that the hotbed is open circuit.

[gastipincha]

this is wat i mesured

[Sherry]

hi,this is a wrong way .please measure it as the picture shows.

[gastipincha]

OKey , i have mesured that its 2 omh

thanks for your help! ... what should i do next ?

[Sherry]

then,please check the fuse voltage on the mainboard.please refer to the following picture.