4-Bin Mailbox - Epson EPL-N7000 Reference Manual

Note:
If you are using Windows, and EPSON Status Monitor 3 is not
installed, you have to make settings manually in the printer driver. Click
the Update the Printer Option Info Manually button on the Optional
Settings menu, and click Settings. Then select Lower Cassette 2 from
the Optional Paper Sources list on the Optional Settings dialog box and
click OK.
Removing the 500-Sheet Universal Paper Cassette Unit A3
To remove the optional 500-Sheet Universal Paper Cassette Unit
A3, perform the installation procedure in reverse.

4-Bin Mailbox

Installing the 4-Bin Mailbox
Follow these steps to install the optional 4-Bin Mailbox:
Note:
If you are installing the optional Duplex Unit at the same time,
install the 4-Bin Mailbox before installing the Duplex Unit.
If your printer already has the optional Duplex Unit installed,
remove the Duplex Unit first, install the 4-Bin Mailbox, and then
reinstall the Duplex Unit.
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Installing Options