Auto Off is a feature that shuts down the SPD-SX automatically when it hasn't been used for 4 hours. This can be helpful if you've mistakenly left the SPD-SX's power turned on. You can disable this feature if desired. Here's how.
1. Press the MENU button.
2. Press the Function 2(F2) button below the display to highlight the "SETUP" icon, and then press ENTER.
3. Use the cursor buttons to highlight "OPTION" and then press ENTER.
4. Cursor to AUTO OFF, and then press the (-) button to choose "OFF."
5. Press EXIT when you're finished. The new setting is saved automatically.