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preenfm2 and preenfm3 / Re: preenfm3 sd card error
« Last post by Olivier on October 30, 2020, 12:39:58 AM »
Next week i will try my screen with 3,3Volts instead of 5 Volts. I hope the built-in SD card will work.
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preenfm2 and preenfm3 / Re: preenfm3 sd card error
« Last post by Olivier on October 30, 2020, 12:30:55 AM »
Ili9341 TFT display's built-in SD card does not seem reliable (search on the internet). We are two with the same problem and need to use an external SDcard reader.
Another problem is about the dimension of this screen. Mine is shorter than the one you show on the Wiki/Build. This mean that it's impossible to fit a unique metal or 3D case.

Aliexpress or amazon are not reliable supplier for this screen. When we order a Ili9341 TFT, we do not get the same product.

The best case would be to define 1 reference for the screen and 1 reference for the  SD card reader(or micro Sd card) from a trust supplier (mouser, ...). I don't know if it's possible.
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preenfm2 and preenfm3 / Re: PreenFM2 SMD (rev6 board) - no sound
« Last post by autodafe on October 29, 2020, 10:48:43 PM »
thanks Xavier, I think I solved it.
In the "Flash Bootloader" instructions (https://github.com/Ixox/preenfm2/tree/master/flash) there's a link to the pfm2_flash.dfu, which is probably still an old version of the firmware,
I solved it by downloading the latest v. 2.2.20  and now I get sounds out of it...
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preenfm2 and preenfm3 / Re: preenfm3 sd card error
« Last post by Xavier on October 29, 2020, 10:44:05 PM »

Seems like your SD card reader from the screen does not work.
I bought almost 10 from amazon between 10€ and 15€ they all worked well  :-\

I still haven't found a SD card that does not work so i don't know how to debug that.

I'm glad you found a solution.
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preenfm2 and preenfm3 / Re: PreenFM2 SMD (rev6 board) - no sound
« Last post by Xavier on October 29, 2020, 10:40:57 PM »

You can try to hold INST and press buttons on the LEFT to play sound without midi input.

Check volume in the Eng> filter page.
Check number of voices is > 0 for the instrument you play.

Do you use a DAW ? or a midi keyboard direclty ?

Can you post a good quality picture of the back of you PCB to see if something obvious is visible.

Thanks,

Xavier
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preenfm2 and preenfm3 / [Solved] PreenFM2 SMD (rev6 board) - no sound
« Last post by autodafe on October 29, 2020, 08:43:30 PM »
hi, I just finshed assembling my new SMD PreenFm2 (rev6 board)
Everything seems to work
-I soldered encoders, jacks, buttons and so on
-I flashed the Firmware at 1st time
-There's MIDI acitivty using USB (I can see numers 1234 on screen)
-I load some DXt sounds from the USB stick

but I have no output.
Volume is turned on
Am I missing something really basic maybe?
what shoud I check ?
Most of components were presoldered on this board..

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preenfm2 and preenfm3 / Re: preenfm3 sd card error
« Last post by Olivier on October 29, 2020, 05:16:52 PM »
I have try 0.92 firmware. The Outputs are OK.

My  SDcard reader works with a micoSd card Sandisk Mobile Ultra 8GB Class 6. It doesn't work with SD card Kingston 8GB class4. It also doesn't work with a very old SD card SimpleTech 128MB.

I have try the SDCard reader from the screen, the SDcard become hot very quickly and the screen was black or White, didn't remember.
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preenfm2 and preenfm3 / Re: DIY help, frozen screen
« Last post by served on October 28, 2020, 12:57:33 PM »
Great!

Remove all the IC-s from the sockets.
Keep the preenf405 and USB stick in place and try to boot. See what happens.
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preenfm2 and preenfm3 / Re: DIY help, frozen screen
« Last post by zmberber on October 28, 2020, 12:11:12 PM »
Look over the USB Drive connector, make sure there is no excess stress on it.
It is angled slightly upwards, as you suggested in your instructions, and you are right, it won't fit otherwise.  What do you mean by stress?  It seems like the connectors are soldered well, and the drive connector is stable, but I can still check that.

The stick has been formated from 64GB to 1GB and FAT32 so that PreenFM can read it.
Dont change it.

Hm... I didn't change the partitioning, I just reformated the (only existent) partition itself (vfat) and copied the pfm2 folder onto the root directory again.  So there should be no problems there.  Also, it did read the stick, it just froze again.

Is your 5V coming from your eurorack bus or from the onboard regulator?

The 5V is coming from the Eurorack bus, which I selected via the jumper.
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preenfm2 and preenfm3 / Re: DIY help, frozen screen
« Last post by zmberber on October 28, 2020, 11:56:46 AM »
i would definitely start by just reheating all the preenf405 socket connections. remove the preenf405 first then reheat all the connections on the sockets, make sure they make good clean solder blops. do you have a multimeter?
yes i have a multimeter.  i thought i did have clean solder blops, i thought i paid attention but i will do as you say and try that.

did you solder the preenf405 headers on your own? this would be my next guess for failure.

no i didn't, the headers were presoldered by van daal electronics.  i don't know if they test it there (solder headers, then check with a socket of a working module etc EDIT: yes they do, see message by served).  but i did think about that too.
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