Clock How do you set the clock on the DEH P4000?

To set the clock on a Pioneer head unit:
Hold the 'Source' button until the unit powers off.
Hold the 'Function' button until an item appears on the screen and starts flashing.
This is the 'Initial Settings' menu, where you can set the clock and more depending on the head unit model.
Press and release the 'Function' button to switch between options in this menu and use the left/right/up/down arrows to adjust settings for any option.