EPSON AcuLaser C9200N Revision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 91
Confidential
2.3.2.3  Operation
SWITCHBACK MECHANISM
 Switchback operation 
The Paper Exit Roller of the main body is used to subject the 1-sided print 
to a switchback sequence so that the 1-sided print is to be transported 
through the Duplex Unit.
Switchback operation
 Paper Exit Roller drive coupling mechanism 
When the Duplex Unit is mounted, the tip of the Duplex Unit Lever raises 
the Idle Lever to cut off the drive from the main body (Fusing Rollers) and 
the Paper Exit Roller is driven by the Switchback Motor.
Figure 2-87.  Paper Exit Roller drive coupling mechanism
 Switchback Motor Control 
Rotation of the Switchback Motor is controlled by the signals output from 
the Duplex Control Board.