Turn the Data Wheel if necessary, so that the 7 Segment Display shows “1”.
Disengage the MUTE button on the Channel 5-6 mixer strip.
Confirm a single voice is audible through both speakers.
Sweep the Input knob full counter clockwise, listening to confirm that the volume
decreases.
Sweep the Input knob full clockwise, listening to confirm that the volume increases.
Return the Input knob to 12 o’clock.
Ensure that Harmony button is lit.
Turn the Harmony knob fully clockwise.
Confirm multiple voices are audible through both speakers.
Press the Mute button on the Channel 5-6 mixer strip.
Listen through the headphones.
Turn the Headphone Level knob clockwise until you can hear multiple voices singing in both of the headphones.
13. Turn the Headphone Level knob to full counter clockwise.
Remove headphones.