Printer still is not working

[Haralds]

Hi!

ok!

I agree non heating the hot bed is not a board problem. It works.

I connected the hot end and hotend termistor in place of hot bed and it works.
I connect the hot bed and left connected the hot end's termistor and hot bed start heat.

What You can advise for this case?

Haralds

[William]

Hi!

ok!

I agree non heating the hot bed is not a board problem. It works.

I connected the hot end and hotend termistor in place of hot bed and it works.
I connect the hot bed and left connected the hot end's termistor and hot bed start heat.

What You can advise for this case?

Haralds

So did you check the thermistor underneath the heat bed?See my picture:

QQ截图20161104122831.png (372 KiB) Viewed 8657 times

[Haralds]

Yes! I check it. Both wires are alive.

Haralds

[William]

Yes! I check it. Both wires are alive.

Haralds

Could you take a picture of it like mine?
At the same ,you can measure the resistance of your bed thermistor,whose value should be about 100K ohm.

[Haralds]

Hi there is pictures.

Resistance measurement shows there is no connection.

With original wires, attached too and measured directly too.

Haralds

[William]

Hi,Haralds
Sorry i didn't find the thermistor in your picture.Was it missing?
Tear out the tape on the bed so you can measure the resistance from the 2 pins of the thermistor directly.
You know what,i'm suspecting the thermistor is a bad one or it wasn't solder well...
See my picture:

QQ截图20161104150224.png (926.81 KiB) Viewed 8654 times

[Haralds]

Hi!
There are measurements

[William]

So you don't have this stuff(thermistor) on the surface of your bed?Or you unplugged it ?

QQ截图20161104154440.png (481.65 KiB) Viewed 8652 times

QQ截图20161104154630.png (182.19 KiB) Viewed 8652 times

[Haralds]

I do nothing with it.

It is as was at delivery time.

I thought that it is integrated in the bed inside...

If it should be on surface then it never was there.


So what is Your sudgestion? What I should say to seller?

Haralds

[William]

Yes,Haralds
You should tell your seller about it and let her resend a bed thermistor with previous broken stuffs together.
You can solder it on the two solder joints underneath the bed when it arrives.

Finally we find the problem,the thermistor is used to detect the bed temp,but it was missing and that's why you get "0/0" for bed on LCD.