Yamaha MCX-CA15 Owner's Manual page 178

Restricting access to functions (Lock function)
8
Use u/j/d/i to select "OK" and press SELECT.
To cancel changing the password, select "Cancel" and press SELECT.
The password for the Lock function is changed to a new one.
Reset the password
To operate locked functions or change the Lock function settings, you need to enter
the password on the password entry screen. If you forget your password, you can
reset the password to the default setting of "mcx-1000" by carrying out the following
procedure. Please note that the password is case-sensitive.
1
Use u/j/d/i to enter "MCAST", and then select "OK" and press
SELECT.
To cancel resetting the password, select "Cancel" and press SELECT.
The password is reset to the default setting and the password entry screen
appears again.
2
Use u/j/d/i to enter "mcx-1000", and then select "OK" and press
SELECT.
To cancel accessing the selected function, select "Cancel" and press SELECT.
The selected function becomes accessible.
If you want to change the password from the default setting of "mcx-1000", carry
out the "Change the password" procedure (see page 6).
8 MusicCAST Version Upgrade 2