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Messages - Mortic

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PreenFM2 / Re: Big Problem..
« on: October 11, 2019, 06:26:05 PM »

Check jumper Jmp2 is ON.

Yes, that was it, thank you.  ;D

PreenFM2 / Re: Big Problem..
« on: October 04, 2019, 08:41:49 PM »
If it cannot read and write on the key : USB key problem.
As the Usb key is directly wired to the Microcontroller, that cannot be other components.
The first USB key must be burned as it cannot accept more than 5V.
Format it again copy the /pfm2/ fodler from the zip file.
If it still does not work try another USB Key.

I changed the key (for the third time) and it was good that was it!

"The usb power does not work either" : What do you mean ?
I thought we could feed the preen by usb port but apparently no.

In any case I love this synth and I want to say congratulations and thank you for creating it :)

PreenFM2 / Re: Big Problem..
« on: October 01, 2019, 09:13:34 PM »
Hi Xavier,
I changed the MCP4922 and the 6n1372, the sound came back and the midi too. (yeah!)
But I discovered a new problem ...
when I want to save patches or settings the PreenFm2 freeze, nothing responds ..
I changed usb key (in fat32), put the latest firmware (2.10) but nothing works.
The usb power does not work either and he does not read the dx7 presets too.
it's as if he could not read and write on the key .
Any idea what this can be?

Thank you in advance for your answers.

PreenFM2 / Re: Big Problem..
« on: September 25, 2019, 11:23:20 PM »
Hello, I received and changed the 7805, the preen restart all the knobs respond but unfortunately no sound comes out, the midi does not answer either and the 7805 heats a lot (I do not know if this is normal).

I redo the tests and the point supposed to be 5v are, apart from those of the screen that were 4v.

The points that are supposed to be 3.3v are also, except for the Shift registers (74HC165N) there is on one of them a point at 2.9v instead of 3.3v.

The points to be 2.5v are not at all ... less than 1v for each.

Matrix12x: I do this as soon as possible.

That's what I can give for now.

PreenFM2 / Re: Big Problem..
« on: September 21, 2019, 12:51:44 AM »
Thank you for your answers

- Observer: Thank you for your advice, I think I will follow it :)

_Xavier: I test with the USB nothing comes out of the voltage regulator usb and therefore for the rest of the circuit idem.

With the power supply here are the values I could have :

PreenFM2 / Re: Big Problem..
« on: September 18, 2019, 08:39:33 PM »
Hello,Sorry for the response time.

 I tried but it does not work ..

The screen does not display anything when I plug in the power supply but the LEDs respond the time of a blinking.

I noticed that the usb key had burned out, I replaced it but still nothing.

It's a shame I think it's a very good synth. :-\

PreenFM2 / Big Problem.. [Solved]
« on: September 14, 2019, 12:58:43 PM »
Hello everyone,

This morning not very awake visibly, I was wrong to power and plugged 16v into the PreenFM2 ...
This one does not turn on anymore, could you help me?

Thank you in advance for your answers.


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