Hi! New user here. I have an AVIC Z1 and I want to delete everything; music library too. I want to also delete any and all software upgrades that have been done on the unit, Gracenote and firmware, too. Can someone tell me step by step how to do this? I want this to go back to the factory setting like it was when it was brand new out of the box.

From the manual:

To return the entire navigation system to the

default or factory settings, initialize the navigation

system in the following order:

 

1 Turn the ignition switch off.

2 Press RESET button.

3 Start the engine.

After a few moments, the start-up screen

comes on for a few seconds.

4 Touch and hold MAP button while the

start-up screen is displayed.

“Clear memory screen” appears.

5 Touch [Clear user information from

hard disk].

p This reset operation clears all music data

recorded in the music library. Note that the

cleared data cannot be restored.

6 Touch [Yes].

The user area in the hard disk drive is initialized.

After that, the navigation system restarts.

7 Press MENU button and then touch

[settings].

The setting menu appears.

8 Touch [Hardware] and then touch [3D

Calibration Status].

9 Touch [Learning Status] and then touch

[Reset All].