-Should have read open the volume for OSC 2 and 3
-- In emlsynth@y..., "rob80b" <rob80b@y...> wrote:
> With the exception that the internal calibration has not gone out of wack
follow
> the procedure below∗ to tune the to 12 notes per octave.
>
> A.
> 1. Open the volume for Osc 2 & 3, all controllers off, sustain on
> 2. turn the Keys/Oct Coarse pot all the way to the left (counter clockwise)to
> #12
> 3. Set Osc 2 in KB1 position.
> 4. Set Osc 3 in KB 2 position
> 5. Play the top G on the keyboard and tune the two oscillators in unison
> 6. Play the bottom F, the two oscillators should still be in tune.(if not see
> below)∗
> 7. Now play the bottom F and the first F above (one octave) simultaneously,
If
> they are not playing exactly 12 notes per octave they will be out of tune.
> 8. Use the KEYS/OCT FINE pot to adjust the tuning until the beating
ceases.
> 9. To obtain a precise interval jam the lower F with something (cardboard,
or
> tape it down) to keep the key depressed and simultaneously play the third
> octave F, use the KEYS/OCT FINE pot to eliminate any beating.
>
> B.
> ∗
> Oscillators 2 and 3 have identical schematics, internal adjustments are
> necessary only if
> 1. You really cannot get even one oscillator to play an octave
> 2. Or after following the above procedures only Osc 2 plays an octave and
> Osc 3 goes out of tune.
> Try to adjust only the Linearity pot of OSC 3, follow the schematics or look
at
> the board and follow the traces, once found mark the pot position.
> a. tune both oscillators in unison as in step 5
> b. play one octave down, now carefully adjust the internal trim pot for OSC
3
> until both Oscillators are in tune.
> c. Play the bottom F, they should now still be in tune
> d. Now follow the tuning procedure in section A
>
> --- In emlsynth@y..., "Luther Rochester" <lrochester@s...> wrote:
> > hi
> > well, i've figured out the difference between serial numbers on the 101s.
the
> layout of board 1 (amps/keyboard voltage) is completely different. on my
> earlierl #280 there are 5 trimpots instead of 6 (my instructions are for #300+
),
> and they are scattered in different places. since the schematics are
different, i
> have no way of telling what is what,
> >
> > does ANYONE have calibration instructions for the early serial #s?
> schematics? experience? anything? this thing will not play 12 notes/octave
so
> something needs tweaking. i'll pay for photocopying...
> > thanks,
> > luther
> > lrochester@s...