Epson Aculaser C9200N, Service Manual

Page: 77 / 441

EPSON AcuLaser C9200N Revision D
OPERATING PRINCIPLES Operating Principle of Main Unit Mechanism 77
Confidential
THERMOSTAT CONSTRUCTION
The Fusing Drive Roller has two thermostats. (One on the Heating Roller and one on
the Fusing Pressure Roller)
When the temperature of the Fusing Roller increases abnormally high, the
Thermostat will detect it and shut down the power supplied to the heater lamp. This
controls the High Temperature Protection/Thermostat Protection.
FUSING ROLLER PRESSURE/RETRACTION MECHANISM
†
The Pressure Roller is always pressed to the Heating Roller (Normal
position).
†
By switching the Release lever, the pressure of the Fusing Pressure Roller can
be switched between Envelope position/Paper jam countermeasure position.
„
Envelope position
• By switching the Release lever to the lower direction shown below, the
pressure of the Fusing Pressure Roller will be Envelope position.
• Envelope position is for preventing the wrinkle when feeding Envelopes.
• To switch from Envelope position to the normal position, move up the
Release lever to the normal position.
Figure 2-69. Envelope position
„
Paper jam countermeasure position
• By switching the Release lever to the position Fusing Pressure Roller will
retract from the Heating Roller as shown below.
• Paper jam release mechanism is equipped for removing the stuck paper.
Figure 2-70. Paper jam countermeasure position 1
4038T2C199AA
4038T2C200AA
Normal position
(Normal pressure) Envelope position
(Low pressure)
Release lever
Leaving the printer for 30 days or more with the Release lever
placed in the normal position will deform the pressing part of
Fusing Roller. Deformed Roller may cause "Uneven Gross"
or other image troubles when printing images with high
density (high duty image) such as photographs.
Therefore, be sure to switch the Release lever to the
"Envelope" position when leaving the printer for a long
period of time.
4038T2C199AA
4038T2C201AA
Normal position
(Normal pressure) Paper jam release
position (No pressure)
Release lever