How to enter code for Clio CD Player using Keys and not Steering Switches?

Hi,
Got a Clio CD Player with code, problem is I can't get the dash board display although the player is alright ( My car is a Ford ). How can I input the code using only the keys on the Clio CD Player? Can you tell me the exact key sequence such that I can do that without seeing the dash board display say my code being '9201' ? Thanks