Fusing Process; Fuser Unit - Epson AcuLaser C1900 Service Manual

EPSON AcuLaser C1900/AcuLaser C900

2.4.6 Fusing Process

2.4.6.1 Fuser Unit

OVERVIEW
In this process, the toner transferred to the paper in the transfer process is fused to the paper.
For fusing, this printer uses the heat roller fusing system. The sheet with toner on passes
between the heat roller, which is heated up by the heater lamp, and the back-up roller.
During this passage, heat and pressure are applied to permanently fuse the toner to the
paper.
Thermostat (TS1)
Thermistor (TH1)
Fusing Roller
Fusing Roller
5
Heater Lamp (H1)
Figure 2-22. Fuser Unit
Operating Principles
DRIVE
The fuser mechanism is driven by the main motor (M1).
Pressure Spring
FUSING ROLLER PRESSING
Pressure Roller
The fusing roller and pressure roller must always be in the pressed position except when
they are released from pressure for maintenance work or parts replacement. At the
occurrence of paper jam in the fuser area, release the fusing roller from the pressure by
bringing the fusing jam removal lever into the release position.
Pressure Roller
Heater Lamp (H2)
Description of Mechanisms
Main Motor (M1)
Figure 2-23. Drive
Fusing Jam Removal Lever
Figure 2-24. Fusing Roller Pressing
Revision B
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