Xerographics (Pl11.1) - Epson AcuLaser C4000 Service Manual

EPSON AcuLaser C4000/C4100/C3000

2.5.8 Xerographics (PL11.1)

2.5.8.1 Main Functions
ROS ASSY (PL11.1.1)
The ROS ASSY (Raster Output Scanner Assembly) is an exposure device
that sends out laser radiation to form electrostatic images on the surface of
the drum.
In this manual, items related to the ROS ASSY are simply called ROS.
The ROS ASSY is constructed of the following main components:
• Quad Beam Laser Diode
• Scanner Motor Assy
• SOS PWB
• Lens
• Mirror
• Window
PHD ASSY (PL11.1.3)
The PHD ASSY (Print Head Assembly) handles the charging, developing
and transferring steps of the print process.
The PHD ASSY is constructed of the following components:
• Drum (Y)
• Drum (M)
• Drum (C)
• Drum (K)
• HTC (Y)
• HTC (M)
• HTC (C)
• HTC (K)
• IDT 1 (2)
• IDT 1 Cleaner (2)
Operating Principles
• Developer (Y)
• Developer (M)
• Developer (C)
• Developer (K)
• Refresher (Y)
• Refresher (M)
• Refresher (C)
• Refresher (K)
• IDT 2
• IDT 2 Cleaner
Functions of Main Components
CHUTE ASSY REGI (CLUTCH REGI) (PL10.1.1)
The CHUTE ASSY REGI is constructed of the CLUTCH REGI (PL10.1.12),
the ROLL REGI RUBBER (PL10.1.10) and the ROLL REGI METAL.
Driving force is transferred from the DRIVE ASSY MAIN (PL14.1.2) to the
ROLL REGI RUBBER by the CLUTCH REGI (PL10.1.12), and the paper is
conveyed toward the PHD ASSY from either the Tray path or the MSI path.
In addition, when the leading edge of the paper reaches the CHUTE REGI
(PL10.1.14), the CLUTCH REGI becomes a retaining loop for the paper
until the ROLL REGI RUBBER begins rotating, and it corrects skew of the
paper edge to ensure proper feed.
SENSOR REGI (Regi Sensor) (PL10.1.20)
Detects the leading edge of the paper when it reaches the CHUTE REGI.
(Paper present: sensor receiving)
SENSOR OHP (PL10.1.16)
Regular paper scatters radiated light, and the SENSOR OHP catches that
reflected light, detecting the paper. OHP (Over Head Projector)
transparencies do not scatter much direct light, so the SENSOR OHP
cannot catch any reflected light. This method determines if the sheet being
fed from the MSI is an OHP transparency or regular paper.
Figure 2-28. Xerographics
Revision F
2-77