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warpboy
Joined: Jun 09, 2010 Posts: 19 Location: paris
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Posted: Sat Sep 10, 2011 4:49 am Post subject:
ps3100 V1.0 pcb (no lfo) Subject description: doesn't work |
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hello,
I'm building the first version pcb designed by Fonik (no lfo).
At this time it doesn't work correctly.
. small problem : less sound when the mix pot is full wet (it may be a resistor value problem, but other problem :I have the same sound wet or dry...)
it doesn't change anything when I turn each of the 3 resonators pots (with a signal cv, square,sine or any other type).
I have to adjust the 3 trimmers, but what is the voltage required at the output of each trimmers. is this a critical parameter?
I'm triyng to understand how works the circuitry :
CV input---->bc550+bc560--->vactrol vtl5c3/2
it could help be in debugging the board.
thank you by advance
Warpboy |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Sep 10, 2011 9:35 am Post subject:
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is it hte single sided layout for self etching? _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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warpboy
Joined: Jun 09, 2010 Posts: 19 Location: paris
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warpboy
Joined: Jun 09, 2010 Posts: 19 Location: paris
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Posted: Mon Sep 12, 2011 12:28 pm Post subject:
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hello,
finally it works...
I've found 2 mistakes R9,R10 in parts list 270K and 10K in the schematic. the right value is 10K ( I've looked at the V4 resonator with lfo schematic)
I have added a wire between the cathodes of the second and third vactrols and 0V...
and it works
just a question : how can I adjust the 3 trimmers ?
Thank you
Fabien |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Sep 12, 2011 11:19 pm Post subject:
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warpboy wrote: | hello,
finally it works...
I've found 2 mistakes R9,R10 in parts list 270K and 10K in the schematic. the right value is 10K ( I've looked at the V4 resonator with lfo schematic)
I have added a wire between the cathodes of the second and third vactrols and 0V...
and it works
just a question : how can I adjust the 3 trimmers ?
Thank you
Fabien |
glad you solved the problem yourself.
from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then?
anyways, sorry for the inconvenience. i am glad you got it working now.
BTW i set the trimmers on my units so that the LEDs are off with no CV applied and with potentiometer fully CCW. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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warpboy
Joined: Jun 09, 2010 Posts: 19 Location: paris
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Posted: Tue Sep 13, 2011 12:15 am Post subject:
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hello,
thank you Fonik, I'll adjust the trimmers today.
Quote: | from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then?
anyways, sorry for the inconvenience. i am glad you got it working now. |
that's exactly.... as soon as I 'll have time, I'll post a picture with modifications...
for the rest : Thank you guy !!!!!! resonators are so nice.....
Warpboy |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Tue Sep 13, 2011 12:41 am Post subject:
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warpboy wrote: | Quote: | from what you are saying i understand that the BOM is wrong AND that there are traces missing on the layout (cathodes to GND)? sorry for that. i wonder how i did built mine back then? |
that's exactly.... as soon. as I 'll have time, I'll post a picture with modifications... |
this would be more than nice. would you mind if i uploaded this picture to my site then? _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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warpboy
Joined: Jun 09, 2010 Posts: 19 Location: paris
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Fri Sep 16, 2011 12:26 am Post subject:
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warpboy wrote: | Hello,
here is a copy of the parts placement with 2 modifications.
I've built the LPG too, really nice, it's a piece to built
Thank you Fonik |
great! thank you very much. i just uploaded your info to my site... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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