Oki 2500 - Manual (Page 34)

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3
Maintenance
2. Place the color printhead in the printhead storage box.
If you have a high-capacity black printhead stored
in the box, remove it and install it in the printer
(because it is sealed, the optional high-capacity
black printhead can be left in the printer during
transportation).
As soon as possible after the move:
1. Remove the color printhead from the storage box and
reinstall it in the printer.
If you swapped the color and black printheads, you
will need to remove the black printhead from the
printer before reinstalling the color printhead.
2. Make sure paper is loaded, then press the Power/Reset
button to power up.
4. Press and hold the Resume/FF button for 2 to 5 seconds to
run a demo print.