| Problem | Solution |
| VCO won't oscillate | Listen to the SawTooth wave form. Check that the FET is properly oriented. Increase capacitor from 18pF to 25 or 30 pF. |
| Voltage Drop on the power supply A hot or dis-colored 22 Ohm resistor on the center-line of the board. |
Tantalum Capacitor in Noise Section reversed |
| Distorted output - sounds like a buzz-saw or static | Hot input to filter - attenuate the input to +/-2.3V for 2 voices. Reduce resonance (Q) |
| Envelope Doesn't Trigger | Adjust Envelope Trimmers |
| Low Output from White Noise | Increase gain on noise trimmer. |
| White Noise Output pops or cuts out | Poor performing noise transistor. Test on a breadboard, listen and perhaps view on a scope to see the voltage swing. |
| Filter doesn't track at ALL | Adjust VCF tracking trimmer. Deflux. If that doesn't help, perhaps you have a bad transistor. |