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1
Sorry for not replying.
And thanks you very much for the update and
The 2 last weeks were really busy.

I'm really glad you found solution for your 2 problems  :)

Yes those displays are very sensitive to any electronical noise, and some models just lost the connection with the preenfm3.
That's very usefull for me to know you fixed the problem by swaping the screen.
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preenfm2 and preenfm3 / Re: A failed PM3 build
« Last post by Xavier on June 24, 2022, 04:22:18 PM »
Sorry for the delay.
It the blue led stays on it means the firmware stays in the preenfm3 bootloader.
Can be because the firmware is not flashed (although the bootloader is).

Have you tried turning it on while pressing the MENU button ?
That should enter the bootloader in graphical mode.
So you should see the bootloader on the display.


Bridging J1 on the screen requires to power it with a 3.3v power.
Not sure it's possible with PCB 1.1.
It's not good to power it with 5v if J1 is bridged.

Even if the screen is broken, you should not have the blue led solid and you should get sound when paying midi.

Let me know if you find something, i have spare parts so we'll find a solution.
3
Well, I took it all apart, reflowed the solder points connecting MIDI out and retouched a bunch of stuff and cleaned and cleaned and cleaned and initial testing shows that MIDI through is working perfectly well, so I assume MIDI out is working correctly too, although I have not completely verified this with the MIDI controller mode. It will be very nice if that happens to work.

Mark this one as 'solved.'
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preenfm2 and preenfm3 / Re: A failed PM3 build
« Last post by jabberwalky on June 21, 2022, 04:22:46 PM »
Any ideas anyone? Solid blue LED. Everyone else posts about a blinking LED. Does solid indicate something? My only assumption is the touch screen is dead, and it's an expensive part.
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preenfm2 and preenfm3 / Re: FM3 MIDI CC list?
« Last post by Megalomidiac on June 20, 2022, 11:38:39 AM »
In case anyone can't be bothered going through the source code list linked above by Toltekradiation, here is a pdf. I think I have filled in all the CC numbers correctly but please let me know here if you find an error.

Xavier feel free to remove this post if it is not helpful or accurate. Thanks.

Thank you very much, this helps me a lot!
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Sorry I have not given you a chance to reply Xavier, I have put a new screen in my new unit and it seems to have fixed the problem. This is the screen that I used: https://www.amazon.com/dp/B073R7BH1B?psc=1&ref=ppx_yo2ov_dt_b_product_details If anyone experiences this problem I would first replace the screen

Note it is a touch screen, perhaps this makes a difference. It is a little expensive but it looks much better and also doesn't white-screen (or hasn't yet in the time period I would expect it to) I am sure this is a DIY unit, there's a few other aspects of the construction I'm not happy with but I can fix back at the shop. I would expect that the screen the builder used was not a high-quality screen and so it wasn't reliable.

Now the only issue is the lack of MIDI out, there's a lot of debris on the board and the solder points around the jack look like something I would do.
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preenfm2 and preenfm3 / Re: FM3 MIDI CC list?
« Last post by ericd on June 19, 2022, 01:17:56 PM »
In case anyone can't be bothered going through the source code list linked above by Toltekradiation, here is a pdf. I think I have filled in all the CC numbers correctly but please let me know here if you find an error.

Xavier feel free to remove this post if it is not helpful or accurate. Thanks.
8
I have now also discovered that my unit is not passing MIDI out of the MIDI port. I will open it up again this weekend and check out the solders around the MIDI port. It is possible that I bought a poorly-assembled DIY unit.
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preenfm2 and preenfm3 / Re: FM3 MIDI CC list?
« Last post by Megalomidiac on June 17, 2022, 12:12:42 PM »

Hi,

I know the midi doc is not very up to date.
Don't hesitate to ask any questions if you need more details.

Is there any new development in the MIDI list?

I think it would be very handy if there where more deep MIDI control over the FM.
So you could just use it like the OP6 with its sliders. Just add a LaunchControlXL to it and here you go. ;)

Of course it would be the best, if the Preen had a MIDI learn feature, so there would not be a hardcoded list and you could just do it learn what is needed.
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FYI I've ordered some new screens to test out. I wonder if this problem is caused by a certain batch of screens that don't act right. Even with the TFT set to auto-reset, sometimes it stays white, sometimes it successfully autoresets. I'm going to try the new screens and see if they fix things.
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