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2.1.1.5 Image Transfer
The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper.
2.1.1.6 Fusing
The toner image transferred onto the paper is fixed securely using a heat roller system as the fusing system.
The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which is securely fixed by
the pressure between the upper and lower fusing rollers. Thermistor TH1 detects and controls the temperature
of the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C (392° F), shutting
down power to the heater lamp.
Image Transfer Unit
Housing
Pre-Image Transfer Roller
Housing
Electrode Comb
Electrode Comb
Housing
Pre-Image Transfer
Roller
Housing Ground
Image Transfer Bias
PWB-F
CN1F
PWB-S
C180 MAIN
IC201
CN204
1
8
1
8
1
8
1
8
Figure 2-7. Image Transfer
Lower Fusing Roller
Thermal Fuse
Thermistor
Upper Fusing
Roller
Heater Lamp
Paper
Figure 2-8. Fusing
Operating Principles EPL-5500W Service Manual
2-6 Rev. A