Moog Source - Page 7

OSC 2 HIGH END COMPENSATION
FILTER EMPHASIS ADJUST
Follow the same procedure used for Osc 1 except
adjust HIGH trim R39.
lugh
or OSC 2 TUNE CHECK
Using the same control panel settings as above ex¬
cept EMPHASIS at 80. adjust EMPH trim R164 until
filter just begins to oscillate (observe on scope).
Refer to Osc 1 Tune Check procedure.
FILTER. SCALE AND RANGE ADJUST
im OSC 2 RANGE ADJUST
Set the following controls:
OSC 1 OCTAVE
OSC 2 OCTAVE
INTERVAL
To access Osc 2 AUTO TUNE, press and hold
STORE and press OSC 2 LEVEL. Set to 50 using
incremental control knob. Adjust RANGE trim R78
for zero beats (unison).
INTERVAL MONOTONICITY
Turn OSC 1 LE VE L to 0 and connect scope to
U7A. pin 1 (2V/DIV DC). Turn up INTERVAL until
a 10V transition occurs on scope. Move INTERVAL
up and down through this transition and adjust INT
trim R70 for a minimum pitch change.
Return control panel settings to LEVEL BAL
ANCE setup and place KB TRACKING to FULL.
Connect reference oscillator in the same manner used
for Osc 1 Scale Adjust except set frequency at 80Hz. I
Depress low C and zero beat using SCALE trim R155.
Depress high C and zero beat by adjusting RANGE t
trim R152. Repeat above steps until both ends are
correct.
CUTOFF MONOTONICITY
Using the same control panel setup as in the pre¬
vious step except CUTOFF at 50, connect scope to
U8A. pin 1 (2V/DIV DC). Turn up CUTOFF control
while watching for a 10V transition on scope. Turn
CUTOFF control up and down just enough to cause
this transition to occur and adjust CUTOFF trim R146
for minimum pitch change.
O
FILTER CONTOUR ATTACK & DECAY TIME
FILTER LADDER BALANCE
ALE
e
Set the following controls:
TRANSPOSE
OSC 1 LEVEL
OSC2 LEVEL
CUTOFF
EMPHASIS
CONTOUR AMT
LOUDNESS SUSTAIN ATTACK-
DECAY-RELEASE
VOLUME
0
0
0
0
0
0
0
max
Strike low C repeatedly and with scope connec
ted to audio output jack J4. adjust LADDER BAL
trim R167 for pulse of <50mV.
Set the following controls: I'
II
ATTACK gg
DECAY 0
SUSTAIN 0 "
RELEASE 0 ar
Connect scope to pin 7 of U43B (2V/DIV DC).
Depress any key and adjust RANGE trim R201 for de
attack time of 8 seconds.
cri
FILTER CONTOUR BALANCE
mi
Set the following controls:
CONTOUR AMT gg E *
ATTACK 0
FILTER LEVEL BALANCE
Set the control panel the same as for Filter
Ladder Balance except set EMPHASIS to 99 and
LOUDNESS SUSTAIN to 99.
Hold down low C key. Measure voltage on pin 3
of U40A and adjust LEVEL BAL trim R168 to obtain
the same reading on pin 1 of U40A.
Short pin 9 of U26 to ground. Adjust CONTOUR
BAL trim R205 so that the voltage on pin 6 of U45 is del
0.000V */- lOmV with respect to ground. ten
LOUDNESS CONTOUR ATTACK & DECAY TIME OS(
Set up the same as for Filter Contour except
connect scope to pin 1 of U43A and adjust RANGE anc
trim R179. - ,