Fusing-Ii - Epson ColorPage EPL-C8000 Service Manual

EPSON EPL-C8000

2.5.11 Fusing-II

1. Fuser Assembly
The Fuser Assembly fuses the toner on the paper with heat and
pressure and transfers the paper to and from the Fuser Assembly.
The Fuser Assembly consists of the Main Fuser Assembly and
Fuser Tray Assembly.
(a) Fuser Tray Assembly
The Fuser Tray Assembly consists of the Fuser In Sensor, the
Oil Cam Solenoid and the Exchange Solenoid. It transfers the
paper to and from the Main Fuser Assembly.
• Fuser In Sensor
The Fuser In Sensor detects a paper pass status from the
position change of the Fuser In Actuator. (It detects the paper
tip based on the detection timing of the Fuser Exit Sensor.)
• Fuser Chute Fan
The Fuser Chute Fan pulls down the paper to the Fuser
Paper Guide and the Horizontal Chute. This is necessary to
position the paper correctly so that the paper is properly
transferred to the Fuser Main Assembly.
• Cleaner Cam Solenoid
The Cleaner Blade in the Belt Cleaner Assembly needs to
touch the IBT Belt Assembly only immediately after the 2nd
toner transfer. It must not touch the belt at any other time. (If
the Cleaning Blade is touching the IBT Belt Assembly while
the toner image is being formed on the IBT Belt Assembly,
the toner image is damaged.)
The Cleaner Cam Solenoid transfers the driving force from
the P/H Main Assembly, via the P/H Drive Assembly, to the
Cleaner Cam Assembly and the Cleaner Cam Guide, and
controls the advance/retract operation of the Belt Cleaner
Assembly. (Advance: The Cleaning Blade moves forward to
the IBT Belt Assembly; Retract: The Cleaning Blade moves
away from the IBT Belt Assembly.)
• Oil Cam Solenoid
If the Oil Roll in the Oil Roll Assembly is constantly touching
the Heat Roll, the Fuser Oil may degrade and oil stains may
Chapter 2 OPERATING PRINCIPLES
appear on the paper. The Oil Roll needs to touch the Heat
Roll only during the fusing operation; at other times, the Oil
Roll must remain separated from the Heat Roll.
The Oil Cam Solenoid transfers the driving force from the P/H
Main Assembly, via the P/H Drive Assembly, to the Oil Cam
Assembly, and controls the advance/retract operations of the
Oil Roll Assembly. (Advance: The Oil Roll of the Oil Roll
Assembly moves forward to the Heat Roll; Retract: The Oil
Roll moves away from the Heat Roll.)
• Exchange Solenoid
After fusing, the paper may be ejected face up or face down.
The Exchange Solenoid switches the Exchange Chute and
controls the paper ejection modes.
• Exit-1 Roll Assembly
The Exit-1 Roll Assembly transfers the fused paper from the
Fuser Main Assembly.
2. Oil Roll Assembly
The Oil Roll Assembly has an Oil Roll in which Fuser Oil has been
impregnated. The Oil Roll in the Oil Roll Assembly follows the Heat
Roll rotation and applies the Fuser Oil evenly onto the Heat Roll
surface. The Fuser Oil prevents the following:
• Paper from being rolled into the Heat Roll.
• Heat Roll wear caused by contact with the Temperature Sen-
sor Assembly and the H/R Fingers.
Rev. B
2-37