1. Turn the unit off, and set the POWER CONTROL knob to STANDBY.
2. Press and hold the PANEL button and turn the Katana on. The Booster, Mod, Delay, and Reverb LEDs will flash.
3. Release the PANEL button. Once the PANEL button starts flashing, the factory reset is complete.
It takes approximately 30 seconds for the factory reset to be completed. Do not turn off the power while the factory reset is in progress.