Chapter 44-9F-4-244) Open the DADF fully.5) While opening the pickup middle guide found to the left of the feeding belt, aim a blower brush against the prism of the reflecting face of the reversal sensorin view in the rear to clean.F-4-254.2.4.12 Manual Feed Registration 0011-26861) Remove the body front cover.2) Remove the main cover.3) Aim a blower brush against the detecting hole of the registration sensor on the delivery upper guide to clean.F-4-264.2.4.13 Pickup Roller 0011-26871) Open the pickup assembly upper cover.2) Remove the pickup cover.3) Clean the surface of the roller using lint-free paper or cloth moistened with alcohol.F-4-274.2.4.14 Separation Belt/Feeding 0011-26881) Obtain a single sheet of A4 or LTR copy paper.2) Remove the ADF controller cover, and set the DIP switch (SW1) on the ADF controller PCB as indicated.[1]