EPSON EPL-N3000/AcuLaser M4000N Revision C
Operating Principles Functions of Major Components 56
Confidential
2.5.10 DUPLEX
With this printer, the DUPLEX is available as an optional unit. Duplex printing is
permitted if this DUPLEX unit is installed at the rear of the base engine.
SWITCH DUPLEX
This switch detects that the HSG LOWER DUP and COVER HSG DUP are closed.
SENSOR DUP
This sensor detects presence/absence of paper in the DUPLEX unit.
FAN DUPLEX
To prevent abnormal temperature rise inside the DUPLEX unit, this fan sends out the
air inside the DUPLEX unit and takes in outside air.
ROLLER DUP
This roller feeds the paper whose first side was printed to the printer again through the
DUPLEX unit in order to print the second side.
PWBA DUPLEX
The PWBA DUPLEX, incorporating a CPU, receives commands from the HVPS/
MCU and information from sensors and switches and controls paper feeding operation
in the DUPLEX unit.
The CPU mounted on the PWBA DUPLEX uses flash ROM so that the firmware can
be rewritten by communication.
MOTOR DUPLEX
Gives driving force to the three rollers named ROLLER DUP that convey paper into
the printer.
Figure 2-34. Major Components of the DUPLEX
JG6615AA
PWBA DUPLEX
SWITCH DUPLEX
SENSOR DUP
MOTOR DUPLEX
ROLL DUP
FAN DUPLEX
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