Contents5.4.3 Scanner Motor ........................................................................................................................................... 5-375.4.3.1 Removing the Reader Rear Cover ...................................................................................................... 5-375.4.3.2 Removing the Scanner Motor ............................................................................................................. 5-375.4.4 Contact sensor............................................................................................................................................ 5-385.4.4.1 Removing the Reader Front Cover ..................................................................................................... 5-385.4.4.2 Removing the Reader Rear Cover ...................................................................................................... 5-405.4.4.3 Removing the Copyboard Glass ......................................................................................................... 5-405.4.4.4 Removing the Contact Image Sensor (CIS)........................................................................................ 5-425.4.4.5 After Replacement of the CIS............................................................................................................. 5-445.4.5 Copyboard Cover Open/Close Sensor ....................................................................................................... 5-455.4.5.1 Removing the Reader Rear Cover ...................................................................................................... 5-455.4.5.2 Removing the Copyboard Cover Open/Closed Sensor (front/rear).................................................... 5-465.4.6 Contact Sensor HP Sensor ......................................................................................................................... 5-475.4.6.1 Removing the Copyboard Glass ......................................................................................................... 5-475.4.6.2 Removing the ADF Reading Glass..................................................................................................... 5-485.4.6.3 Removing the Contract Sensor Home Position Sensor ...................................................................... 5-495.4.7 Original Size Sensor .................................................................................................................................. 5-505.4.7.1 Removing the Reader Rear Cover ...................................................................................................... 5-505.4.7.2 Removing the Copyboard Glass ......................................................................................................... 5-515.4.7.3 Removing the Original Size Sensor.................................................................................................... 5-535.4.8 Reader Heater (option) .............................................................................................................................. 5-555.4.8.1 Removing the Copyboard Glass ......................................................................................................... 5-555.4.8.2 Removing the Reader Heater (right)................................................................................................... 5-575.4.8.3 Removing the ADF Reading Glass..................................................................................................... 5-585.4.8.4 Removing the Reader Heater (left)..................................................................................................... 5-58