Electrical Discharge - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500
A total of 4 toner images is transferred from the drum to the Belt at the
"Repeat (Complete Toner Image Formation) step. During this time, the
toner image in the process of being formed on the Belt will be destroyed if
the 2ND BTR touches the Belt. The 2ND BTR must therefore be moved
away from the Belt (retract) except for when transferring the image to
paper (advance). Advance and retract are switched by the BTR CAM
SOLENOID.
Figure 2-16. Secondary Transfer-2
Operating Principles

2.1.3.8 Electrical Discharge

This is the step where the paper charge is neutralized/eliminated by allowing
the DC voltage to escape to the surface of the backside of the paper from the
Detack Saw (discharge plate).
The Detack Saw receives a supply of high voltage from the HVPS. Image
quality is negatively affected by splattering of toner caused by the positive
charge induced at the "Secondary Transfer" step. The paper is discharged
by the Detack Saw to prevent affecting the image quality.
Revision C
2-12