Epson TM-C7500 Series Technical Reference Manual page 44

4
Put the maintenance box into the plastic bag for disposal of used
maintenance box.
5
Push the new maintenance box gently in, with its labeled surface upward.
6
Close the maintenance box cover.
7
When the maintenance box replacement is completed, the INK LED turns
off, and printing can be performed.
8
The product goes into the pause state. Push the Pause button to release it,
and the product returns to the idle state.
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