7. Insert the T-20 thin bladed torx screwdriver into the access hole at the rear of the printer. 8. Fully tighten the T-20 horizontal attachment screw which secures the OMAS to the printer. Removal & Installation 9. Clip the Media Sensor to the Center Guide. 10. Clip the OMAS access cover back into place by sliding one edge of the cover into the slot and then applying enough pressure to it so you can clip it into the other slot. 11. Calibrate the OMAS ⇒ See page 167 . 12. If the calibration fails, repeat the procedure from step 4 above to ensure it is correctly positioned. 1 2 356 Chapter 8 Removal & Installation