Mechanical Operations; Switchback Mechanism; Switchback Operation; Paper Exit Roller Drive Coupling Mechanism - Develop QC 2235 Plus Service Manual

Mechanical operations

4. Mechanical operations
4.1

Switchback mechanism

4.1.1

Switchback operation

• The Paper Exit Roller of the main unit 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.
Feeding the Paper into Duplex Unit
Paper Exit
Roller
4.1.2

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 unit (Fusing Rollers) and the Paper Exit Roller is driven by
the Switchback Motor.
Paper Exit Roller
4.1.3

Switchback Motor Control

• Rotation of the Switchback Motor is controlled by the signals output from the Duplex
Control Board.
QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
Exit Sensor (PC30)
Switchback Motor
(M1-DU)
2-4
Idle Lever
Duplex Unit
Lever