Google is your friend, here is the first link I got with your question:
http://www.laptopmanual.net/asus-x5dc-laptop-service-manual/
Here is the link for the general user manual:
http://www.laptopmanual.net/manual/Download_PDF_Asus_X5DC_Laptop_User_Manual/351/1
And for the Asus X5DC Laptop Hardware Service Manual:
http://www.laptopmanual.net/manual/Download_PDF_Asus_X5DC_Laptop_Hardware_Service_Manual/351/2
Hope this will help you.
Electro, September 2011