09-13-2012 02:45 PM
The WPA passphrase is set in the wireless router. The printer itself does not have anything to do with the passphrase, but it does need it to connect to the router. The passphrase should be the same you used to connect other wireless devices to this new router.
If you have a computer on the wireless network, you can try using the Print and Scan Doctor to retrieve your WPA passphrase. The provided link has the steps included on how to do this using this tool.
What brand and model is the router?