- Remove the ADF unit. (ADF Unit)
 - Remove the scanner front cover. (Scanner Front Cover)
 - Remove the scanner upper cover [A].
 Move the scanner carriage to the right.
- To move the carriage, hold the carriage belt and move it carefully.
 - Never hold the carriage itself.
 
- Remove the brackets [A][B].
 - Remove the scanner HP sensor [B] while lifting up the bracket [A] slightly.