Use the following steps to assign the MIX IN signal to the Headphone Output only:
1. Press SETUP.
2. Press F2 (OUTPUT).
3. Press F4 (OTHER).
4. Press the CURSOR right (>) button to highlight the "MIX IN" tab.
5. Turn the VALUE dial to move the marker to so it lines up with "PHONES."
6. Press EXIT when finished. The setting is stored automatically.