OldSynths

Hi all,

i have a problem with a moog source... it was working very good, and
one day the OSC 2 went out of tune, i tryed to calibrate the OSC 2 but
i cant get the range and scale... i replaced the 3086 array transistor
and i made the calculation for the TEMP trimmer (-0.546 volts) but the
problem it's the same, i check the TEMP circuit and everything seems to
be fine.. i replaced some related componets (IC's, resistors and
tubular caps) but the problem persist. I Also checkd the PSU and
replaced the elec. caps. The problem seems to be the temperature of the
OSC 2.

Anyone had experience with this problem ?

Regards,

--- oxygeno1313 <oxygeno1313@...> wrote:

> Hi all,
> 
> i have a problem with a moog source... it was
> working very good, and
> one day the OSC 2 went out of tune, i tryed to
> calibrate the OSC 2 but
> i cant get the range and scale... i replaced the
> 3086 array transistor
> and i made the calculation for the TEMP trimmer
> (-0.546 volts) but the
> problem it's the same, i check the TEMP circuit and
> everything seems to
> be fine.. i replaced some related componets (IC's,
> resistors and
> tubular caps) but the problem persist. I Also checkd
> the PSU and
> replaced the elec. caps. The problem seems to be the
> temperature of the
> OSC 2.
> 
> Anyone had experience with this problem ?
> 
> Regards,
> 
> 
> 
> 
> 
> 
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Someplace in the OSC2 circuit you have a temperature
sensitive transistor - it's "stuck", find it, and
replace it.


		
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