11. From the bottom of the printer, remove and discard one T-20 screw which secures the OMAS vertically to the printer. 12. Carefully lower the OMAS from the printer as far as you can with the large ribbon cable still connected. Removal & Installation 13. Release the two locking clips of the large ribbon cable connector. 14. Disconnect the large ribbon cable from the OMAS. Optical Media Advance Sensor (OMAS) 353