http://books.jvcservice.com/booklist.asp?Model=KD-S570J Visit this link and it will show you the owner's manual in a PDF file, then go to page 19, and it shows you how to set the clock... Funny thing the same thing happened to me when I got a car recently and the CD receiver is the same and I pressed all of the buttons and NOTHING.. So I went on a search to find the owner's manual online and found it... Anyway this should hopefully work.... Kenny