Ricoh Di-C1 Manual page 309

Di-C1 Training
Overview
The side tray is an additional output tray.
This can be installed when the 500-sheet finisher
is installed, so that the user can (for example)
send copy-mode outputs to the finisher tray, and
fax-mode outputs to the side tray.
This is because, when the finisher is installed,
the one-bin tray cannot be installed.
Slide 309
No additional notes
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