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6) VCF Resonance Adjustment
Obtain ground at TP5. Set the Octave to 8, Waveform to PW and PWM to 10. Measure CN05-7 (on the voice board or CN05-13 on the KiwiSix Board) using
the DVM and adjust the VCF cutoff control to as close as you can get to 0.000v. Check CN05-11 (on the voice board or CN05-9 on the KiwiSix Board) with
the DVM and adjust the Resonance control as close as you can get to 8.000v. Connect the oscilloscope probe to TP1 Signal Out (top left in the last picture).
Play any single key and adjust VR6 (left of VR7 - green arrow) to obtain 300mV peak to peak ±20mV. Repeat this for each voice.
7) VCF Cutoff Adjustment
Set Resonance to 10 and leave the other settings the same as in step 5. Play any key
and adjust VR8 (right of VR7 - green arrow) for a frequency of 523Hz (C4) (±10 Cents).
Repeat for each voice.
8) VCF EG Intensity Adjustment
Set Waveform to PW and PW/PWM to 10, Cutoff to 0, Resonance to 10, EG Int to + 5.
Leave others at normal setting. Play any key and adjust VR4 to obtain 5kHz (±500Hz)
(200uS for a full wave cycle on the oscilloscope). VR4 is located near the right hand end
of
CN12 and is marked EG INT ADJ on the board.
9) VCF Keytrack Adjustment
Set Octave to 16'. Connect DVM to CN05-6 and adjust VCF Keytrack to 1.6v.
Leave the other settings as in step 7. Adjust VR5 so that playing the bottom C to the next
C
up sounds like a scale. VR5 is located next to VR4 and is marked KBD T ADJ on the
board.
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KiwiSix Upgrade User Manual v3
