Epson DFX-9000 Reference Manual page 20

Note:
Be careful not to pull the paper too tightly when adjusting the right
sprocket.
10. Pull the printer's front cover out slightly and lower it until it
is closed.
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20
Paper Handling
Caution:
❏ Do not push the front cover directly down; always pull
it out slightly before closing.
❏ Before turning on the printer, be absolutely sure you
have removed all protective materials. (See the
Unpacking instructions that are provided with the
printer for more details.) Turning on the printer while
the print head cannot move may seriously damage the
mechanism.