Oce 3121, Technical & Service Manual

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504 TSM Océ 3121 Functional description
Sequence of operations (two-sided copying)
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 mo-
tor M8 is switched on at a specified time after the copy passes PS7.
The copy is directed down to the refeed unit, preparing for the imaging of the
second side. The figure shows the sequence of operations for two-side copies.
3 The refeed unit
Outline
The copies carried to the refeed unit, are arranged in a step formation: ready
for two-sided copying or for overlay copying.
The step formation: the leading edge of each sheet is slightly behind the lead-
ing edge of the previous sheet. This enables correct separation of the copies as
they are peeled off the bottom of the stack.
Parts name Notation
Main motor M1
Motor for the retarding roller M6
Motor for the exit roller M7
Sensor for the re-pick entry PS11
Lower feeding assembly inlet paper sensor PS12
Solenoid for the re-pick entry SL4
Clutch for the lower refeed CL5
SCFW SCRV LSTR SCFW SCRV LSTR
Fixing rear paper
sensor (PS7)
Paper deflecting plate 1
solenoid (SL5)
Delivery sensor (PS13)
Pick-up started for 2nd side
*1 *2
Copy paper is moved to the lower feeding assembly.
Copy paper is moved to the delivery assembly.
*1 :
*2 :
*2 Delivery roller motor
(PS13)
CW CCW