Problem with UV LEDs of my new SL1 and support (or lack of thereof)
 
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Problem with UV LEDs of my new SL1 and support (or lack of thereof)  

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arthur.k7
(@arthur-k7)
New Member
Problem with UV LEDs of my new SL1 and support (or lack of thereof)

So I build this SL1 kit, finally had time to do it. Everything went well until 'preflight check' and Setup Wizard Step 6 - Display test:

UV LED never came on and I've got the following error:

UV voltages differ too much.
Values are 14.154, 13.471, 14.200

I unplugged the connector  and plugged it back on - no change. So I started the support chat - but that was not much help - I send the guy a picture of the connector, and screen with the error and he didn't have any suggestion and it was gatting late here (1 am Mountain Time). I asked for a troubleshooting procedure to be emailed to me and the person responded:

"Alright, no problem. We will contact you back, if you find more details about issue you can use our email [email protected]"

So next day I didn't get any emails from support and did some toubleshooting on my own:

- unplugged the UV LED cable at the controller and plugged it again
- restarted the setup wizard with the same error
- measured the power supply voltage at the controller board = 24.0 V
- checked the UV LED cable at the UV LED disconnected and plugged in again
- restarted the setup wizard with the same error 
- re-flashed the firmware to 1.3.0 and repeated the wizard, same error
 
Described above in a nice e-mail (send Friday June 05 my time)  with a copy of support chat and no response so far.
Follow up with another email yesterday and no response.
In my opinion, there is an issue with LED panel or drive circuitry on the control board.
I am attaching a couple of pictures, perhaps someone has any ideas. 
UV LED connector and the control boardUV LED panelUV LED Error
Posted : 11/06/2020 4:49 am
Olef
 Olef
(@olef)
Honorable Member
RE: Problem with UV LEDs of my new SL1 and support (or lack of thereof)

Support chat is really the only way to deal with support. The emails are rarely answered in under 3 days or more. All you can do is to get on chat and complain that you have been sent a defective product. If the person you are speaking to is not helpful ask to be escalated.

Once upon a time every Prusa support helper used to be good and go the extra mile. Lately they seem to be employing the more common type of useless helpdesk chair filler which is very sad.

Good luck!

Posted : 12/06/2020 8:31 am
matthewkear
(@matthewkear)
New Member
RE: Problem with UV LEDs of my new SL1 and support (or lack of thereof)

I have a similar problem to you Arthur.  My LED voltages are reading [24.14, 14.13, 24.11].  Only LED strip 2 is actually illuminating. 

Did you manage to get this resolved? 

Posted : 23/06/2020 6:58 am
gnat
 gnat
(@gnat)
Noble Member
RE: Problem with UV LEDs of my new SL1 and support (or lack of thereof)

Running into the same error. While it sounds like my Live Chat experience was better, I still did not get an answer and was sent to email support.

In my case, with the case partially open UV light does spill out so the LEDs are working to some degree. My live chat person had me remove the print LCD and run the display test. The expectation was that one or more individual LEDs would not be lit up indicating a board problem or an entire row would be out indicating a cable issue. It looks like all my LEDs lit up though as shown in this video: https://photos.app.goo.gl/jaqydpH18aTHwnew5

Figuring that maybe it really was a loose cable I reassembled it and tried again, but still got the same error. Here is a video showing the UV light spill out during the (failed) test: https://photos.app.goo.gl/mzkQuUyRirkdDQXN6

MMU tips and troubleshooting
Stop SL1 tank leaks with a simple o-ring...
Posted : 22/08/2020 9:27 pm
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