To remove the Micromoog's keyboard assembly, take out the four screws shown circled in this photo.

The 2 front screws are self-tapping and mount to #8A speed nuts on the front lip of the keyboard assembly.

The 2 rear screws are #8-32 x 3/4" machine screws with split-ring lock washers.

All 4 screws use cup washers.

On the underside of the keyboard, use a stick eraser to rub dirt and oxidation off of the buss rod and the "J-wires" that contact it.

You can do this with the synth turned on, so you can hear when intermittent notes are cleaned up.

If the buss rod is heavily oxidized you can bend a J-wire a bit to the side so it contacts a different spot on the rod.

Sometimes a key guide will be bent and rub against a key's metal frame, causing a slow or sticking action.

In this case, use a needle nose pliers to straighten the guide.

Micromoog Oscillator Adjustment

Tuning and scaling of the Micromoog is fairly easy.  Start by setting the top panel knobs and switches as shown here.

Unmarked controls are either unimportant or detailed in the following steps.

1. Stand the synth on end.  Holes let you adjust trimmers using a small blade screwdriver.  Their functions are labeled on the upper lip of the rear panel.



2. On the top panel, set OSCILLATOR to DRONE and OCTAVE to 2'.  On the rear panel, set FINE TUNE to vertical.  Monitor the tone with a tuner.



3. If you must adjust the FINE TUNE knob significantly for an F5 tone (700 Hz), then set the knob to vertical and adjust the OSC RANGE trimmer for F5.



4. Now, set OSCILLATOR to NORM and OCTAVE to 8'.



5. On the keyboard, hold down LOW-F.  (A matchbook wedged between keys is helpful.)  Adjust FINE TUNE for F3 (175 Hz).



6. Now hold down HI-F.  Adjust the OSC SCALE trimmer for exactly 2 octaves higher than LOW-F.

7. Now, set OSCILLATOR to 2' and hold down LOW-F.  Adjust FINE TUNE for F5 (700 Hz).



8. Hold down HI-F and adjust the OSC HI trimmer for F7 (2.8 kHz).



9. The OSC HI and OSC SCALE trimmers interact so repeat steps 4 thru 8 until all the tones are right.



10. Set OSCILLATOR to DRONE and adjust FINE TUNE for F5 (700 Hz).



11. Set OCTAVE to 16' and adjust the OSC OCT trimmer for F2 (87.5 Hz).



12. Finally, return OCTAVE to 2' and verify that the tone is F5 (700 Hz).