Vintage Synth Repair

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,