Fuser Section - Kyocera TASKalfa 420i Service Manual

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Fuser section

The fuser section consists of the parts shown in Figure. When paper reaches the fuser section after the transfer process,
it passes between the press roller and heat roller, which is heated by fuser heaters 1 or 2 (FH1 or FH2). Pressure is
applied by the fuser pressure springs so that the toner on the paper is melted, fused and fixed onto the paper. The heat
roller is heated by fuser heaters 1 or 2 (FH1 or FH2) inside it; its surface temperature is detected by the fuser thermistor 1
and 2 (FTH1/2), and is regulated by the fuser heaters turning on and off.
If the fuser section becomes abnormally hot, fuser thermostat 1 and 2 (FTS1/2) operates shutting the power to the fuser
heaters off. When the fusing process is completed, the paper is separated from the heat roller by its separation claws and
is conveyed from the machine to eject and switchback section.
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10
2
3
1
Figure 2-1-16 Fuser section
(1) Heat roller
(2) Fuser heater 1 (FH1)
(3) Fuser heater 2 (FH2)
(4) Heat roller separation claws
(5) Fuser thermistor 1 (FTH1)
(6) Fuser thermistor 2 (FTH2)
(7) Fuser thermostat 1 (FTS1)
(8) Fuser thermostat 2 (FTS2)
(9) Press roller
(10) Press roller separation claws
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5
2KR/2KS
7, 8
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