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I recently purchaced 4 of the "Stairville Mini Stage PAR 7x4W RGB"'s.

Stairville Mini Stage PAR 7x4W RGBW – Musikhaus Thomann

(https://www.thomann.de/de/stairville_mini_stage_par_7x4w_rgbw.htm)

They worked fine for quite a while, until on one, the entire Blue Channel Died.

Here i'll document the process of fixing them!

The Diagnose

I had 3 Possible Diagnoses:

  • (DMX) Control Unit Error
  • LEDs Died
  • LED Driver Error

Spoiler: Final Diagnose

After Ordering new LEDs and Switching them for the Original ones, it still didnt work - in the end it was a Error in the LED Driver unit. More below.

Taking the Unit Apart

Its honestly pretty straight forward, not much to explain.

Replacing the LED's

I first thought the LED's had died since there was still a supply Voltage, so i ordered replacements.

I ordered these 3x1W RGB 6 PIN Leds from Aliexpress:

0.69C$ 91% OFF|10 stücke führte hohe leistung led perlen chip rgb 3w 9w rot grün blau flutlicht lampe modul bühne lampe lampen teile| | - AliExpress
Smarter Shopping, Better Living! Aliexpress.com
aliexpress.com

Honestly, I'm unsure if they are the right fit, since the full r,g,b color is slightly mismatched to the original ones, which could be bad for lightshows!

These are the original LED's

One LED Desoldered

Leds fully swapped

The Realisation

Blue Channel - Still Dead

So I take it apart - again - and inspect the Circuit Board closer

Take a look at the 3 Black chips in the Middle:

  • Top Chip: Bottom Right Pin - No Solder
  • Middle Chip: 2nd from Bottom Right Pin - No Solder

Factory Issue.

I simply Soldered the Pin back, and WELL - Blue works again.

Wrapping Up

So well - Problem solved.

I wouldn't have had to change the LEDs, but the issue was the Controller.

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