Hi tsvilenov,
Thank you for your reply. You can refer the service manual for information on how to replace the wireless card. The service manual in PDF can be downloaded from the following link:
http://dell.to/130Td7I
Dell Wireless 1520 (802.11 a/b/g/n) WLAN Half-Height mini-Card is compatible with Studio XPS 1647. You can purchase this card from the following link:
http://dell.to/12hfTTm
Please let me know if you need further assistance.
