Making Two-Sided Copies - Oce 3121 Technical & Service Manual

2 Making Two-Sided Copies

Outline
The figure below shows the paper path used when making two-sided copies.
After it leaves the fuser, the copy is directed towards the output tray. A short
time after the copy passes the sensor PS7, the delivery roller reverses*. The
motor M8 is switched on at a specified time after the copy passes PS7.
For the second side of a two-sided copy, the delivery roller rotates clock-
wise**. Then, the copy is sent to the output tray.
Solenoid for the paper
deflector SL5
Motor for the output
roller M8
Paper deflector
Paper deflecting plate 1
Sensor for the
Delivery sensor
Delivery
Delivery roller
roller
Movement of the deflec-
tor
Details of the movement of
the paper deflecting plate
ed.1
Two-sided
1st side
OFF
CW -> CCW
Fuser sensor PS7
Fixing assembly paper sensor
Retarding roller
Set-back rollers
Path of the copy
*1 Flow of copy paper
SL5
ON
OFF
Overlay
2nd side 1st side
OFF ON
CW OFF
Registration roller
Registration roller
Re-pick up roller
Re-pick up roller
Path of the copy
*2
Flow of copy paper
SL5
OFF
OFF
2nd side
OFF
CW
16 Duplex 503