First try to download a free user manual here http://www.radioshack.com/ProdSupport/DocumentDetail/DocumentDetailIndex.asp?P=support_accessories&D=2513&T=htm
To obtain a manual for a compaq printer you need to ring compaq on this number:-
Alternatively you can email them via there website feedback pages
Please note compaq have taken over digital and digital manuals can now be obtained through the same telephone number.