Paper Path Components - Epson EPL-N4000 Service Manual

EPSON EPL-N4000/EPL-N4000+

2.2.1 Paper Path Components

The Paper Path is made up of a number of major components and
subcomponents.


Tray Assembly
Holds plain paper of various sizes. Slides into the Feeder.


Feeder 1 and Feeder 2
Framework that is attached under the printer. A Tray Assembly
slides into the Feeder. The Feeder includes a number of paper feed
components.

Lift Up Motor raises the Tray Bottom Plate so the paper
contacts the Feed Roll.

No Paper Sensor monitors the level of paper in the Tray.

Paper Size Sensor monitors the size of paper in the Tray.

Feed Clutch transmits drive to the Feed Roll and Nudger Roll.

Nudger Roll drives the top sheet of paper into the Feed Roll.

Feed Roll drives the top sheet of paper out of the Tray.

Retard Roll prevents multiple sheet feed.

Take Away Roll and Pinch Roll continue to drive the sheet of
paper out of Tray 2 and toward the Registration Roll.


MSI Feeder
Paper feed assembly that is attached to the outside of the printer. A
small quantity or paper, or the optional Envelope Feeder, fit on the
MSI Feeder fold-out tray. The MSI Feeder includes a number of
paper feed components.

MSI No Paper Sensor monitors the level of paper in the MSI
tray.
Rev.B

MSI Paper Size Sensor monitors the size of paper in the Tray.

MSI Feed Clutch transmits drive to the Feed Roll and Nudger
Roll.

Nudger Roll drives the top sheet of paper into the Feed Roll.

Feed Roll drives the top sheet of paper out of the MSI tray.

Retard Pad prevents multiple sheet feed.

Take Away Roll and Pinch Roll continue to drive the sheet of
paper out of the MSI Tray and toward the Registration Roll.


Registration Roll and Pinch Roll
The Registration Roll is a driven roll. The Pinch Roll is an idler that
rides on the surface of the Registration Roll. The Registration Roll
and Pinch Roll register a sheet of paper with the toner image on the
surface of the Drum.


Registration Sensor
Monitors the movement of paper at the Registration Roll.


Drum and BTR (Bias Transfer Roll)
In addition to xerographic functions, the Drum and BTR drive the
paper out of the Xerographic area and into the Fuser area.


Heat Roll and Pressure Roll
In addition to fusing functions, the Heat Roll and Pressure Roll drive
the sheet of paper out of the Fuser and into the Offset Unit.


Fuser Exit Sensor
Monitors the movement of paper out of the Fuser.


Offset and Exit Unit
The assembly located above the Fuser. The Offset Unit drives
paper to either the standard Face Down Output Tray, to the optional
Face Up Output Tray, or to the Duplex Module. The Offset Unit
includes a number of components.
Chapter 2 Operating Principles
57