Epson LX-300 User Manual page 66

2. Install the motor unit in the right hand corner of the printer,
with the gear facing the center of the printer. Push it down
firmly to fit the metal pins into the slots.
3. Insert the motor unit plug into the connector on the printer.
4. Slide the print head to the middle of the printer; then slide the
plastic part on the color ribbon to the center of the cartridge.
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Using the Printer