Internal ADF optical unit CAUTION Every effort should be made to keep the optical unit free of dirt and dust. Note After removing the optical unit, set it on a piece of soft material. 1 Remove the following covers: • ADF feeder cover—See page 104. • ADF back cover—See page 107. • ADF front cover—See page 108. 2 Disconnect three connectors (callout 1). Note The ribbon cable is equipped with a ferrite block that can easily come off of the cable. Make sure not to lose the block. 3 Disconnect one ribbon cable (callout 2). 2 1 1 Figure 96. ADF optical unit (1 of 8) C8523-90921 Internal 125