Topics

1

preenfm2 and preenfm3 / Operator mixer

« on: August 27, 2023, 05:14:16 AM »

Preenfm3 here. Is there any operator mixer that I dont know of? I can change the levels at the level page but single knob for all the adsr would be wonderful.

Thank you!

2

preenfm2 and preenfm3 / PREENFM3 CONTROL PANEL CONNECTION PROBLEM

« on: August 08, 2023, 09:21:44 PM »

Hi,

Completely newbie here. Preenfm3 is my first DIY project.

I assembled everything as per the build but control board buttons and knobs were either not working or working randomly.

I thought this is because bad soldering, first tried to repair the suspected bad soldering and then tried to desolder 6 pin connector where I ruined some of the pads  :'(

At this point I took professional support and got the 3 ruined connections hardwired to the correct tracks. The unit returned to the initial build state where %99 of the time the buttons and knobs are not working.

I checked the forum treads with control board problems and followed the steps for checking.

I've done all continuity and shortcut tests on all the connector pins. All are ok.

I get 5v on all 4 74HC165

I've checked the continuity of all buttons, all are ok.

All led activity at the main board are ok.

Connecting a midi keyboard I get sound and midi activity but no blue light blinking on the control board.

I couldnt enter DFU mode with the DFU button, neither with the menu button (which is not working).

My control board version is V2.0.1 and the main board v2.1

Any advice on the next step?

Thanks!!!

Olus