LoopA LED issue

d081c27a6572a96d

Hi,
I almost finished my LoopA, but I have an issue with the LEDs. the right part oft them mostly dont function, sometimes it run through all of them. Any idea where I should look? Thanks!
All buttons work, display is flawless too, just all the LEDs at the right side, both next to the display as below have an issue.

d081c27a6572a96d

The 3rd LED is only lighting up its blue channel, I guess I have to start at that resistor😏

17703227d9536da1

Hopefully it’s easy to fix! The signals from shift register IC4 onwards are missing so you can check:

The output pin of IC3 (pin 9)
The input pin of IC 4 (pin 14), also power (pin 16) and 0V (pin 8).

The serial clock and shift-out are in parallel, so I don’t think it’s that. My guess is that one or more of the pins are cold-soldered or shorted to the adjacent one.

Best,
Andy

d081c27a6572a96d

latigid on Thanks Andy! I’ll try that tonight.

d081c27a6572a96d

that solved it! Now I just have to mount it and will post again to get a serial number. Thanks again!

17703227d9536da1

Great news!

d081c27a6572a96d

Updated succesfully to firmware 2.09. one issue popped up though, the last knob isn’t working as it should….but Im confident can fix that tomorrow.

17703227d9536da1

If the last knob means EN4, the relevant pins are RN13 pins 11/12 and IC3, pins 13/14. Switch pin on RN3 pin 14/IC3 pin 11.

d081c27a6572a96d

Thanks, I hope I dont have to dissasamble the top stack though, that its just bad soldering when installing the switch… I tested the connections with a cable and assumed everything was fine. it’s a learning process I guess😏

d081c27a6572a96d

I meant switch, not encoder btw😊