Moog Source - Page 6

ALIGNMENT PROCEDURE All other contour functions
KB TRANSPOSE
Center Pitch Wheel
0
0
osc 2 I
In normal service. The Source does not require
tuning. However, when components are replaced,
the alignment procedure outlined below should be
followed in the sequence indicated in order to pro¬
vide proper adjustment. Component designators
refer to P.C. Board Schematics. Access to some trim
adjustments require removal of the keyboard. Allow
the instrument to warm up for approximately 30
minutes prior to starting alignment procedure.
POWER SUPPLY ADJUSTMENTS
POWER SUPPLY, BOARD 1
Set +15V supply by adjusting +15V trim R14
for -1-15.000V +/- lOmV. Set -15V supply by adjus
ting -15V trim R4 for -15.000V */- lOmV. Check
both +5V supplies for +5.0V +/- 0.2V.
SYNTH, BOARD 2
Connect DVM to emitter of Q1. Set ♦ lOV supply
for +10.000V +/- lOmV by adjusting 10V ADJ trim
R12.
D/A CONVERTER ADJUSTMENT. BOARD 3
Put OSC 1 LEVEL in edit and set to 0. Adjust
D/A ZERO trim R60 for 0.000V ♦ /- 2mV. (Connect
DVM to U12 pin 1 on Synth Board 2.) Set OSC 1
LEVEL to 99. Adjust D/A FULL SCALE trim R62
for 10.000V +/- 2mV, Connect DVM to KB buss.
Connector (P36 4), press high C and adjust KY8D
trim R72 for 8.824V +/- 5mV.
Connect reference oscillator set to 65Hz, through
series 4.7K resistor and lOuf capacitor, to connector
P23-7. Depress low C and zero beat using RANGE
trim R127.
Depress high C and zero beat using SCALE trim
R123. Check low C and repeat above procedure if
necessary.
OSC 1 OCTAVE ADJUST
Set up the same as for Scale Adjust.
Depress low C and zero beat using rear panel
FINE TUNE R228. Change OSC 1 FOOTAGE to
8' and zero beat using OCT trim R122. Repeat until
both ends zero beat.
OSC 1 HIGH END COMPENSATION
Set up the same as for Scale Adjust except set
OCT 1 to 8' and KB TRANSPOSE to +1.
Depress low C and zero beat using rear panel
FINE TUNE R228. Depress high C and zero beat with
Osc 1 HIGH trim R100.
OSC 1 TUNE CHECK
When high end compensation is set. check SCALE
and OCTAVE adjustments. If they have changed, re¬
peat steps above until all are correct.
SYNTHESIZER CIRCUIT ALIGNMENT, BOARD 2 0“ 2 SCALE
OSC 1 SCALE ADJUST
Set control panel to the following:
GLIDE 0
MOD OFF
OCT 1 32'
W/S1 SAW
SYNC OFF
OSC 1 LEVEL 99
NOISE 0
OSC 2 LEVEL 0
CUTOFF 0
EMPHASIS 0
COUTOUR AMT 99
Both SUSTAINS 99
Set control panel the same as for Osc 1 Scale
Adjust with the following exceptions:
OSC 2 LEVEL 99
OCT 2 32'
INTERVAL 1
The procedure is the same as for Osc 1 Scale
Adjust except use OSC 1 as a reference pitch and
adjust SCALE trim R72.
OSC 2 OCTAVE ADJUST
Follow the same procedure used for Osc 1 except
change OSC 2 FOOTAGE between 32' and 8' (OSC 1
FOOTAGE remains at 16') and adjust OCT trim R71.
Fi
adjust
OSC 21
OSC 2 F
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