I don't own or have access to a CF-73 myself, but came across this stuff when I was helping a friend find out some more information on this model. Since there was nothing here yet, I thought I would post what I found in case someone might find it useful.

Here is the service manual for the CF-73E mk1 model:
(From: http://www.eserviceinfo.com/download.php?fileid=30805)



Here is the Panasonic Canada support web site. It is better than the US support website for downloading drivers and such.
http://www.panasonic.ca/english/customercare/sandd/softwareQuery.asp
Just type CF73 in the Model Number field.

Here is the Panasonic Japan support web site. It is even bettter than the Canadian web site for finding drivers.
https://eww.pavc.panasonic.co.jp/pc/itn/drivers/d_menu_en.html#CF-73

Thanks, and good luck!