Duplex 
 
SM  7-43  M0C3/M0C4/M0C5/M0C6/M0C7 
Descriptions 
7.11.2  MECHANISM 
Duplex Printing Process 
 
   
No.  Item 
1  Duplex motor 
2  Paper exit roller 
3  Paper exit sensor 
4  Registration sensor 
5  Duplex sensor 
   
An independent drive motor in the duplex machine handles paper ejection and reversing. Paper 
from the registration roller is sent to the paper exit roller. The paper exit roller reverses its 
rotation after the trailing edge of the paper has passed the paper exit sensor (but the paper has 
not fully exited into the output tray), and then sends the paper into the duplex paper path. When 
the trailing edge of the paper passes the duplex sensor, the paper exit roller again reverses 
rotation (reverting to its original direction), and ejects the paper into the output tray. 
   
The duplex sensor is also used to detect paper jams.