Replacing all leds in UM2

[luisito 12]

Hi everybody.

I want to replace all leds in my old UM2.

It is rather easy to replace the strips on both sides but i could not find an easy way to replace the strip on top, without disasemble the whole front panel!:-(

Any advice on how to do so, the easiest way, please?

 

E.

 

[tinkergnome 927]

As far as i remember: the leds are 3 strips with short (soldered) connector cables in the corners. All held in place with some (self-) adhesive on the front panel.

The whole strand came out in one piece on my printer. It's a while since i removed the (broken) strips, but i definitely did not disassembled any panels, that's for sure... 🙂 I just loosened the adhesive and pulled the strip out.

 

Do you have any pictures?

 

This picture is borrowed from the assembly manual:

https://github.com/Ultimaker/Ultimaker2/blob/master/um2 assembly manual V1.1 _english.pdf

 

[luisito 12]

ok. I have pulled up all the leds. I can see 8V at the wires coming in from from the controller board. is that correct?

I have tested the failing led strips and they light up at 15V or so, but not at 8V.

[tinkergnome 927]

It's a PWM output between 0-24V - depending on the "Brightness" setting.

The led strips are for 24V (at max. brightness).