Sony DAV-HDX277WC Operating Instructions Manual page 145

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SONY
You will find the product serial number on the main unit and the
carton box.
3-089-014-02 © Sony Electronics Inc.
Thank you for purchasing this Sony product. Proper registration will
enable us to send you periodic mailings about new products and other
important announcements. Registering your product will also allow us
to contact you in the unlikely event that it will need adjustment
or modification. Please take the time to register your new product
at our website:
If you have any operational questions regarding your new purchase,
please contact your retailer. For the location of a Sony dealer in your
area, or for any other questions, please call 1-800-222-S0NY(7669).
Thank you.