1. Recalibrate volume - Diagnostic menu

Poweroff Hold dowm Master and Presett buttons and Power up.

Boots to diagnostics. # 6 A-D calibrate. Hit enter.

Values on the upper left hand display will change. Press Master Edit button. Press Master Edit Button. Press Enter.

Slide volume all the way up and down several times. Then the Pitch wheel Mod Wheel. Leave all of these all the way down when done. Now hit master edit. Check volume control.

Hit enter turn off power and back on.