Lexmark X7500 Service Manual - Page 24

4036-501 Step 2: Scan of side 2 • The paper is re-fed to the large roll by the counterclockwise rotation of the exit/reverse roll. • After the paper passes the gate through the upper path and at the timing when the top of the paper actuates the paper present sensor flag of the pre- registration sensor 2, the movement is interrupted for the specified time to synchronize the paper feed timing and then restarted. • The paper is moved toward the DADF platen glass. • The paper it is interrupted to synchronize the feed timing with the scanning timing of the scanner by the command signal sent from the DADF registration sensor card. • Paper is conveyed on to the platen glass by the rotation of the large roll, and side 2 of the paper is scanned at the platen glass. • After scanning, paper is moved toward the exit/reverse roll passing the gate through its lower path. • Paper movement is interrupted for a specified time when the end of the paper passes on the exit/reverse sensor. 1-14 Service Manual