Calibration: No Affect When Turning Trim Pots

Tips and techniques for Minimoog Analog Synthesizers
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krismiller1982
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Calibration: No Affect When Turning Trim Pots

Post by krismiller1982 » Wed Jan 09, 2013 6:27 pm

I was blessed enough to get ahold of the Voyager tech manuals, but I'm running into a brick wall here. Simply put, when instructed to turn the proper trims for their associated OSC to adjust pitch & scaling, absolutely nothing happens. Not even a slight increase or decrease in pitch. Example: "Adjust RT2 (Range) so Osc1 is E3." so I find RT2 while listening to OSC 1 with the gate open at E3 & turn it..... Nothing.... I'm at a stand still here fellas. Any insight as to what I'm doing wrong here? hope I get some feedback soon. Thanks!!!!

krismiller1982
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Re: Calibration: No Affect When Turning Trim Pots

Post by krismiller1982 » Wed Jan 09, 2013 6:48 pm

I'M A BONE HEAD!!!! I was adjusting the trimmers on the wrong board!!! Now I definitely have to go through & calibrate the whole thing. I was adjusting the trims on board 406P. Anybody know what RT1 RT2 RT3 & RT4 adjust on board 406P so i can go about recalibrating what I moved already? Man what an amature mistake!!! :oops:

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thealien666
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Re: Calibration: No Affect When Turning Trim Pots

Post by thealien666 » Thu Jan 10, 2013 2:49 pm

Oh boy !

I'm sorry to say that, if someone doesn't know that all the oscillators adjustments are on board 11-404P (the easily recognizable big main analog board) inside a Voyager, and doesn't realize that board 11-406P is the touch panel, one should let a qualified tech do the job of calibrating it. Even if one got his hands on the Voyager Service Manual... In which RT1,2,3,4 on board 11-406P are surely described. Heck, they're even described on the board itself next to each trimpot (X and Y axis Hi and Low range, as seen in the photo below) ! :roll:

Image


This is most probably why the Voyager Service Manual is usually not made available to anyone by Moog Music, and rightly so...

Good luck anyway... :mrgreen:
Moog Minimoog D (1975)
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misterpete
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Re: Calibration: No Affect When Turning Trim Pots

Post by misterpete » Thu Jan 10, 2013 3:12 pm

Now I'M IMPRESSED! I thought it was scary enough putting the VX-351 adapter into my Electric Blue. Do you do repairs Alain?

ps: :lol: Destroyed By Technology is right ~ move over Geddy, that'll be me electrocuting myself with board 11-40 ~Bzzzzzzzt! :lol:

thealien666 wrote:Oh boy !

I'm sorry to say that, if someone doesn't know that all the oscillators adjustments are on board 11-404P (the big main analog board) inside a Voyager, and doesn't realize that board 11-406P is the touch panel, one should let a qualified tech do the job of calibrating it. Even if one got his hands on the Voyager Service Manual... In which RT1,2,3,4 on board 11-406P are surely described. Heck, they're even described on the board itself next to each trimpot (X and Y axis Hi and Low range, as seen in the photo below) ! :roll:

Image


This is most probably why the Voyager Service Manual is usually not made available to anyone by Moog Music, and rightly so...

Good luck anyway... :mrgreen:
Please Call Me, PETE
http://soundcloud.com/misterpete
"Mr. Pete" at MuffWiggler |@petedako on Twitter

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thealien666
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Re: Calibration: No Affect When Turning Trim Pots

Post by thealien666 » Thu Jan 10, 2013 4:24 pm

misterpete wrote: ...Do you do repairs Alain?


Having done successful repairs on many vintage synths (most of which I own, or owned) I probably could, but I don't. Sorry. I do, however, try to help others on forums like these to the best of my abilities and with my knowledge and experience of about 35 years of tinkering with electronics. And when I don't know something, or I'm not sure about it, I usually wait until a professional tech like Kevin Lightner comes along and usually learn another thing or two from him. :D
Moog Minimoog D (1975)
DSI OB6
DSI Prophet REV2
Oberheim Matrix-6
Ensoniq SQ-80
Korg DW8000
Behringer DeepMind 12
Alesis Ion

Mr Shave
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Re: Calibration: No Affect When Turning Trim Pots

Post by Mr Shave » Thu Jan 10, 2013 6:32 pm

I fixed my voyager with moog's help... Couldnt stand having it shipped out for a month to get a single IC resoldered... Works like a champ now!

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thealien666
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Re: Calibration: No Affect When Turning Trim Pots

Post by thealien666 » Thu Jan 10, 2013 6:34 pm

Yes, Moog Music's tech support is usually very helpful in most situations. Kudos to them ! :D
Moog Minimoog D (1975)
DSI OB6
DSI Prophet REV2
Oberheim Matrix-6
Ensoniq SQ-80
Korg DW8000
Behringer DeepMind 12
Alesis Ion

krismiller1982
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Re: Calibration: No Affect When Turning Trim Pots

Post by krismiller1982 » Thu Jan 10, 2013 10:15 pm

Just want to say that I got her all calibrated last night, including the touch pad. Thanks for all the help fellas. Andy & tech support was very helpful by sending the manuals.

voyager0500
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Re: Calibration: No Affect When Turning Trim Pots

Post by voyager0500 » Fri Jan 18, 2013 7:34 am

krismiller, check your PM.
'i used to be a plastic cup..'
-remarkable-

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