Image Transfer And Paper Separation; Overview; Transfer And Separation Timing Control - Ricoh Aficio 480W Dolphin-C2 Service Manual

IMAGE TRANSFER AND PAPER SEPARATION

28 April 2005
6.8 IMAGE TRANSFER AND PAPER SEPARATION

6.8.1 OVERVIEW

The transfer corona unit [A] uses a
tungsten wire (φ80 µm) which at transfer
applies about +5.0 kV to transfer toner
from the drum to the paper.
The separation corona [B] applies about ac
4.5 kV and dc –350V to separate the paper
from the drum.
[B]
[A]
B188D946.WMFF

6.8.2 TRANSFER AND SEPARATION TIMING CONTROL

SP2925 002 determines when the machine switches the transfer current over from
the current for the leading edge (relatively weak) to the current for the image
(relatively strong).
If there is insufficient toner transfer at the leading edge of the image, adjust this SP
so that the switchover point is earlier. However, this can cause paper separation at
the leading edge to be less effective.
Also, if paper separation at the leading edge is poor, adjust the SP so that the
switchover point is earlier. However, this can cause insufficient toner transfer at the
leading edge of the image.
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