Xpres SubliJet IQ EPSON Stylus PRO 4880 (Windows Power Driver Setup): Power Driver Installation & Getting Started Guide - Manual (Page 11)

Sawgrass Technologies, Inc . SubliJet IQ ® Getting Started Guide for the EPSON Stylus PRO 4880
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2. Raise the ink lever to the unlocked position.
The ink lever is located to the right of each ink
compartment. If you are installing a complete
set of ink cartridges, then install using the
following order starting from left to right:
Jet Black, Cyan, Magenta, Yellow, Blue,
Light Cyan, Light Magenta and Red.
Note: The cartridge label should be facing left
as the cartridge is inserted into its slot.
Continue to step 5 below.
If you are just replacing an empty cartridge, then continue to step 3 and 4
below.
3. Remove the empty ink cartridge from the
printer.
4. Remove the replacement ink
cartridge from its packaging and insert it
into the slot with the label facing left. Do
not force the cartridge into the slot.