shorty4040

I have just bought an old casio ctk 601 very cheap but with no user manual I have looked on the casio site but there are lots of manuals but not for the ctk 601 I have looked on line for downloads but every one I found you had to put in credit card details I do not want to do this can anyone help I have sussed how to record with the memory but cant suss how to delete the recordings i would be grateful if anyone can help me THANKS