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preenfm2 and preenfm3 / Re: Raystar oled : Screen Issue - what I am doing wrong?
« on: August 28, 2016, 07:43:14 PM »
Yep, I will check what OS I use ... could be the standard speed. Will give it a try ... thanks for your advice 
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preenfm2 and preenfm3 / Re: Raystar oled : Screen Issue - what I am doing wrong?
« on: August 27, 2016, 11:13:25 PM »
I understand this, but why do I observe that the encoders move - but the values as well as the sound don't change as usual. The encoders require many more degrees of turning until a value changes ... if this makes any sense.
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 27, 2016, 10:27:02 AM »
Xavier's note : Aouch..... Sorry SoundRider i edited you message instead of replying 
Could only restore the following :
------
May I ask a question ... can the screen error have a correlation to the use of the encoders? I had the screen issue only during twiddling the knobs. I had the PreenFM2 run for many hours - doing some burn-in like testing - never had the screen failure.
Could only restore the following :
------
May I ask a question ... can the screen error have a correlation to the use of the encoders? I had the screen issue only during twiddling the knobs. I had the PreenFM2 run for many hours - doing some burn-in like testing - never had the screen failure.
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 20, 2016, 10:39:42 PM »
Llet me try to check my USB sources ... I will report back, okay?
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 18, 2016, 02:55:00 PM »
Thanks, good to know ... maybe if I try and succeed I might become a DIY-er too 
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 18, 2016, 09:51:45 AM »
Thanks for your advice Xavier ... great support ... many kudos
will check out the link this evening definitely ...
Question ... do I have to disassemble the mainboard from the housing too, to get the OLED and the resistor mod done, or is it the dismounting of the OLED only. Maybe I did not understand the images of the mod correctly? I had the impression, the complete board assembly has to be dismounted from the housing.
will check out the link this evening definitely ...
Question ... do I have to disassemble the mainboard from the housing too, to get the OLED and the resistor mod done, or is it the dismounting of the OLED only. Maybe I did not understand the images of the mod correctly? I had the impression, the complete board assembly has to be dismounted from the housing.
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 18, 2016, 01:18:16 AM »
Thanks Xavier for the link ... and your answers
this gives me at least an idea, what has to be done. Today I carefully opened the box and had a look inside and closed it later. I have not decided how to proceed, but a DIY seems to be feasible. Where could I find a short description for disassembly of the unit? If I try it myself, I would like to know, if there are some tricks or tools I should better know about, before I brake something or end up with a mess
Since I am still in honeymoon with my PreenFM2 and want to continue with creating presets, I don't want to risk a damage or part from it right now. Maybe I will just use it as is for a while, because the sound generation seems not to be affected.
Xavier - this is an amazing synth - thanks for having made this available for us
this gives me at least an idea, what has to be done. Today I carefully opened the box and had a look inside and closed it later. I have not decided how to proceed, but a DIY seems to be feasible. Where could I find a short description for disassembly of the unit? If I try it myself, I would like to know, if there are some tricks or tools I should better know about, before I brake something or end up with a mess
Since I am still in honeymoon with my PreenFM2 and want to continue with creating presets, I don't want to risk a damage or part from it right now. Maybe I will just use it as is for a while, because the sound generation seems not to be affected.
Xavier - this is an amazing synth - thanks for having made this available for us
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 17, 2016, 09:02:14 AM »...
The 22ohm resistor lower the OLED VDD from 5V to 4.1V if i remember correcly, which makes 3.3v (data high output voltage) closer to 0.9VDD, which explains why the OLED mod fixes the problem.
SoundRider, i can mod for free your preenfm2 if you want.
PM me if interested.
Xavier
Xavier, thank you very much for your generous offer. I am interested.
But before I generate workload, I would like to ask, if Van Daal has provided this mod already? They state the following ... (from their web site)
"NEW: The Assembled PreenFm now contains a new custom made OLED screen shield for lower noisefloor."
In the formum community this seems to be a well known issue and seems to be soved. Is this related to the resistor?
Next question ... would using a 9V power DC adapter solve the problem? If yes, I would consider to go this way.
Last question ... is there information, how such a resistor has to be integrated? I have made some very basic soldering tasks myself and maybe it's basic enough to try a DIY. I only don't want to kill my little darling
I hope my questions are not too basic or stupid ... if ... then be merciful
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 16, 2016, 10:42:52 PM »
I think I will try this next ... there is no need to use USB power for me ...
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 16, 2016, 09:17:21 PM »
Thanks Norbim1 for sharing,
since I am not the electronic expert I will not open the box until there is no other solution around. But I will keep your info in my mind
since I am not the electronic expert I will not open the box until there is no other solution around. But I will keep your info in my mind
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 15, 2016, 09:52:29 AM »
I have used two different USB power sources now. Both are supposed to reacharge cell phones or tablets. One of them provides a special USB port to recharge iProducts and claims to provide higher current as usual. I havn't tested this port for very long now.
Fortunately the display crashes happen not every other minute. Yesterday I spend an hour with the Preen before it happened. After a reboot it did well for a longer time without any problems until I stopped using it.
The probability of the error seems to be linked to the complexity of the algorithm, how many voices I want to use, and if I have the sound playing along, when I turn the knobs quickly and use the shortcuts intensively to move between the menus.
Fortunately the display crashes happen not every other minute. Yesterday I spend an hour with the Preen before it happened. After a reboot it did well for a longer time without any problems until I stopped using it.
The probability of the error seems to be linked to the complexity of the algorithm, how many voices I want to use, and if I have the sound playing along, when I turn the knobs quickly and use the shortcuts intensively to move between the menus.
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 13, 2016, 06:09:39 PM »
Sad, but the OS update didn't solve the "screen-error" ... 
I create patches often supported by an external sequencer (midi) playing tunes or chords. It took about one hour today, until the error appeared, but then, moving an encoder, here it was again and this time lots of strange symbols srambled all over the screen. The sound was okay ... the little box played and played ...
Fortunately I have a workflow now to prevent total loss of my patch. Since every button is in function as it's supposed to be, I save a new raw patch out to it's destination and after having the screen error, I can use the menu button 5 times in blind flight, which saves the patch ... and reboot. Not perfect ... but not killing the fun at least
I create patches often supported by an external sequencer (midi) playing tunes or chords. It took about one hour today, until the error appeared, but then, moving an encoder, here it was again and this time lots of strange symbols srambled all over the screen. The sound was okay ... the little box played and played ...
Fortunately I have a workflow now to prevent total loss of my patch. Since every button is in function as it's supposed to be, I save a new raw patch out to it's destination and after having the screen error, I can use the menu button 5 times in blind flight, which saves the patch ... and reboot. Not perfect ... but not killing the fun at least
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 11, 2016, 12:44:38 PM »
Thank you very much Xavier,
downloaded the OS and will give it a try in the evening. Report follows
downloaded the OS and will give it a try in the evening. Report follows
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preenfm2 and preenfm3 / Re: Screen Issue - what I am doing wrong?
« on: August 08, 2016, 10:41:14 PM »i had similar issues with a macbook not delivering enough current to the preenfm2. try a different power supply (other usb port, different pc, wall wart instead of usb) and see if the error persists.
Thanks for your reply. I will try this and report back.
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preenfm2 and preenfm3 / Raystar oled : Screen Issue - what I am doing wrong?
« on: August 07, 2016, 09:34:15 AM »
Hi Everybody,
I am a HAPPY new user of a PreenFM 2 since one week. It's really a great little beast and I loved it from the first videos on the web. Since I am not an expert building electronics, I ordered a pre-assembled unit ... very professional done IMHO ... no complaints so far. OS is 2.03. I power my unit via USB (a simple converter plug from wall socket to USB socket and a standard USB cable, like for charging cellphones).
Now here is my issue with the screen. If I turn one of the encoders very fast - without using the "Instr" shortcut, the software seems to get a hick-up somehow and ...
either, the screen sweeps slowly from right to left or vice versa, the lines are somehow shifted ...
or, the two lines, which are supposed to show the parameters (line 2 and 4) are missing ...
During the screen issue, the rest of the unit seem to work propperly, including generating sound. A reboot is required to get to normal operation again.
So here is my question. What might be wrong? Maybe it's the powersupply? What is the minimum at volt/ampers required for an adequate power source?
Thanks for any advice in advance
EDIT: My impression is that the chance to get an "display error" is highest, if I change the frequency of an operator during generating a sound.
I am a HAPPY new user of a PreenFM 2 since one week
. It's really a great little beast and I loved it from the first videos on the web. Since I am not an expert building electronics, I ordered a pre-assembled unit ... very professional done IMHO ... no complaints so far. OS is 2.03. I power my unit via USB (a simple converter plug from wall socket to USB socket and a standard USB cable, like for charging cellphones).Now here is my issue with the screen. If I turn one of the encoders very fast - without using the "Instr" shortcut, the software seems to get a hick-up somehow and ...
either, the screen sweeps slowly from right to left or vice versa, the lines are somehow shifted ...
or, the two lines, which are supposed to show the parameters (line 2 and 4) are missing ...
During the screen issue, the rest of the unit seem to work propperly, including generating sound. A reboot is required to get to normal operation again.
So here is my question. What might be wrong? Maybe it's the powersupply? What is the minimum at volt/ampers required for an adequate power source?
Thanks for any advice in advance
EDIT: My impression is that the chance to get an "display error" is highest, if I change the frequency of an operator during generating a sound.
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