Epson EPL-N2700 Service Manual page 67

EPSON EPL-N2700 / N2750
MP Cassette Size Sensor
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The paper size for the MP cassette is detected by the rear paper
guide. The paper size detection mechanism consists of the arm that
joins with the rear paper guide and four mechanical switches in the
printer body. When the rear paper guide is aligned with the paper
size, the arm swivel accordingly, as shown below. The arm has a
notch, which moves as the arm swivels to turn on/off the four
mechanical switches. The paper size is determined according to the
switches' on/off conditions.
Tray
Mechanical Switch
Arm
Guide Edge
Figure 2-9. Paper Size Detection Mechanism
Operating Principles
<A3>
<A4>
op01
<A5>
Printer Mechanism Operating Principles
A4 / Letter Detection
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The MP Cassette has the A4 / Letter detection mechanism. The
mechanism consists of the right paper edge guide, the arm that
engages/disengages with the right paper edge guide, and one
mechanical switch that is installed in the printer main body. When
the right and left paper guides are aligned with Letter size paper set
in the cassette, the arm turns around. This motion switches the
mechanical switch and Letter size paper is detected.
Arm
A4/LETTER Sensor
A4/LETTER Sensor
Figure 2-10. A4 / Letter Detection Mechanism
Revision B
Guide Edges (Right and Left)
A4
LETTER
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