Pioneer DEH-P7950UB

[Type 100]

It's actually covered in the manual. There's a section called "Initial settings." (Medyo malabo nga lang talaga yung manual ng Pioneer.)

All of these settings can be accessed by powering down the headunit (hold the Source button for 3-5 seconds), then holding the Rotary Commander dial down for about 3-5 seconds. The HU's display should beep and turn on. This is the "Initial Settings" mode.

Among the things you can adjust in the "Initial Settings" mode are the auto-face-open ability, the reminder beep, hiding/showing the AUX1 and AUX2 sources, display brightness and dimmer function, and a lot of other things.

[Type 100]

By the way this is my tribute to the DEH-P7950UB.
http://bluepiranha.multiply.com/phot...er_DEH-P7950UB

Pioneer's 2008 headunit lineup now has 3 USB-capable HUs and they seem to have better-designed interfaces, but the 7950 is still the original USB daddy :D