Press Menu.
Press or to display the [General Setup] option, and then press OK. Press or to display the [Security] option, and then press OK. Press or to display the [Setting Lock] option, and then press OK. Press or to select the [Set Password] option, and then press OK. Enter the current four-digit password.
Press OK.
Enter a new four-digit password.
Press OK.
When the LCD displays [Verify:], re-enter the password.
Press OK.
Press Stop/Exit.