Epson Expression 1680 - Manual (Page 70)

Options 4-1
Chapter 4
Options
Using the Transparency Unit
The optional Transparency Unit (B813183) makes it possible to
scan transparencies and slides. Once you install the Transparency
Unit, you can leave it in place even when you scan other types of
documents.
Unpacking the Transparency Unit
Make sure that all the items shown below are included and have
not been damaged during shipping. Contact your EPSON dealer
if any item is missing or damaged.
Transparency Unit
film holders
installation screws (2) reflective
document mat