Lexmark X264 Service Manual - Page 138

is the second side of the media to be scanned., duplex sensor. When the duplex sensor is actuated

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7013-XXX 6. When the ADF scan sensor is actuated the paper advances to the scan area. While the paper is advancing to the scan area, the ADF motor generates pulses which are stored in an on-board counter. These counts along with the ADF scan sensor ensure that the media is travelling at the correct speed through the scan area. The speed the document travels through the ADF scan area is dependent on the image DPI specified by the user. 7. After a predetermined number of counts, the media reaches the scan area and the image acquisition process is initiated. While the image acquisition process is executing, the ADF scan sensor is being polled to determine if the trailing edge of the media has reached the sensor. 8. Once the trailing edge of the scan media has reached the ADF scan sensor, that sensor goes to the off position. After the ADF scan sensor is switched off, the image acquisition process continues for a predetermined length of time. 9. When the image acquisition process is completed, the trailing edge of the media continues to the reverse point. If the scan job is simplex, only the media continues to the exit roller and exits the ADF. 10. If the scan job is a duplex scan job, a solenoid on the ADF is actuated when the trailing edge of the media reaches the reverse point. This solenoid moves a diverter gate to the down position and engages a reversing gear on the exit roll. 11. The reversed exit roll pulls the paper back into the ADF. The transport roll then moves the media to the duplex sensor. When the duplex sensor is actuated, the exit roll stops. Also, the duplex sensor indicates that this is the second side of the media to be scanned. 12. After actuating the duplex sensor, the transport roll moves the media to the take away roll and the ADF scan sensor. Like the first pass of the media, the image acquisition process is repeated for the second side of the media. 13. When the trailing edge of the media reaches the reverse point the second time, the solenoid again moves the diverter gate to the down position and reverses the exit roll. The paper goes back into the ADF unit for a third time. The paper passes through the paper path, but no imaging occurs. This pass is to turn the paper over to the original side up. On the third pass of the media trailing edge over the reverse point, the solenoid is not actuated and the paper passes out of the ADF. 3-46 Service Manual

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3-46
Service Manual
7013-
XXX
6. When the ADF scan sensor is actuated the paper advances to the scan area. While the paper is advancing to
the scan area, the ADF motor generates pulses which are stored in an on-board counter. These counts along
with the ADF scan sensor ensure that the media is travelling at the correct speed through the scan area. The
speed the document travels through the ADF scan area is dependent on the image DPI specified by the user.
7. After a predetermined number of counts, the media reaches the scan area and the image acquisition process
is initiated. While the image acquisition process is executing, the ADF scan sensor is being polled to determine
if the trailing edge of the media has reached the sensor.
8. Once the trailing edge of the scan media has reached the ADF scan sensor, that sensor goes to the off
position. After the ADF scan sensor is switched off, the image acquisition process continues for a predetermined
length of time.
9. When the image acquisition process is completed, the trailing edge of the media continues to the reverse
point. If the scan job is simplex, only the media continues to the exit roller and exits the ADF.
10. If the scan job is a duplex scan job, a solenoid on the ADF is actuated when the trailing edge of the media
reaches the reverse point. This solenoid moves a diverter gate to the down position and engages a reversing
gear on the exit roll.
11. The reversed exit roll pulls the paper back into the ADF. The transport roll then moves the media to the
duplex sensor. When the duplex sensor is actuated, the exit roll stops. Also, the duplex sensor indicates that this
is the second side of the media to be scanned.
12. After actuating the duplex sensor, the transport roll moves the media to the take away roll and the ADF scan
sensor. Like the first pass of the media, the image acquisition process is repeated for the second side of the
media.
13. When the trailing edge of the media reaches the reverse point the second time, the solenoid again moves
the diverter gate to the down position and reverses the exit roll. The paper goes back into the ADF unit for a third
time. The paper passes through the paper path, but no imaging occurs. This pass is to turn the paper over to the
original side up. On the third pass of the media trailing edge over the reverse point, the solenoid is not actuated
and the paper passes out of the ADF.