CAUTION To avoid damage to the optical unit filter (callout 15), maintain an adequate clearance so that the filter will not catch on other parts. A damaged or missing filter causes poor-quality scans. Note When removing the optical unit, be sure to hold the ADF down to prevent it from springing open. 17 Remove one screw (callout 16). 18 Slide the optical unit to the right to disengage the shaft (callout 17). 19 Tilt the unit up and slide it to the left to disengage the other end of the shaft, and remove the unit. 15 6 17 16 17 7 Figure 103. ADF optical unit (8 of 8) To reinstall The ribbon cable is equipped with a ferrite block that can easily come off of the cable.
Make sure that the ferrite block remains reinstalled. CAUTION To avoid damage to the optical unit filter (callout 15), maintain an adequate clearance so that the filter will not catch on other parts. A damaged or missing filter causes poor-quality scans. C8523-90921 Internal 129