General Description Of Each Section - Epson EPL-N2700 Service Manual

EPSON EPL-N2700 / N2750

2.1.1 General Description of Each Section

Paper Feed Section
o
Paper is fed from either the MP Tray or Cassette 1 (universal
cassette). When the printer receives a print command, the paper
take-up solenoid turns ON and a sheet of paper is fed by the paper
take-up roller.
The timing roller front sensor (PC2) detects the fed paper and the
paper is fed to the timing roller for printing.
<Optional cassettes>
When optional cassette (500-sheet lower cassette/LCC) is installed,
paper can be fed from respective paper sources.
NOTE:The optional cassettes are the same as the Cassette 1
(universal cassette).
Print Head Unit (Exposure Section)
o
The laser diode in the print head unit emits a laser beam
corresponding to the print data. The laser beam falls on the rotating
heptagonal polygon mirror to produce a scanning beam, producing
an electrostatic latent image on the surface of the PC drum in the
imaging cartridge.
Imaging Cartridge
o
The imaging cartridge consists of the charging section and
development section. The moving parts of the imaging cartridge are
driven by the I/C drive motor (M1). In the development section, toner
is fed to the electrostatic latent image formed on the surface of the
PC drum to produce a visible toner image on the PC drum.
Transfer Section
o
The transfer section transfers the toner image on the surface of the
PC drum onto the paper.
Operating Principles
Fusing Section
o
Using a heated roller, the fusing section permanently fixes the toner
image onto the paper. The fusing temperature is controlled by using
a heat sensitive element (thermistor) attached to the upper fusing
roller.
Paper Exit Section
o
The paper which has passed the fusing section is ejected to the top
of the printer with the paper exit roller. The paper exit sensor (PC3)
senses the ejection of the paper.
When the optional duplex unit are installed:
For duplex printing, the trailing edge of the printed paper is drawn
inside the duplex unit by the switch back motor in the duplex unit.
Then, the paper is fed to the manual unit by the transport motor in
the duplex unit and waits for the 2nd print command.
Printer Mechanism Operating Principles
Revision B
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