II-24
2.5.5 Drum Cleaning Stage
In the image transfer stage, not all the toner on the photosensitive drum is transferred
onto the paper but some remains on the drum. In the drum cleaning stage, the drum
surface is cleaned by the cleaning roller, so that residual toner on the drum surface is
removed and collected on the cleaning roller itself. The residual toner on the cleaning
roller will be discharged to the drum when starting or non-printing time. The toner will be
collected by the developing roller and reused (for further developing).
2.5.6
Erasing Stage
Before the cleaning stage, the drum surface is exposed to the light emitted from the
erase lamp. (LED lamp) This stage prepares the drum by decreasing its surface voltage
uniformly, ready to receive uniform change in the primary charging stage.
2.5.7
Fixing Stage
An image transferred on paper by static electricity is fixed by heat and pressure when
passing through the heat roller and the pressure roller in the fixing unit. The thermistor
ASSY keeps the surface temperature of the heat roller constant by detecting the surface
temperature of the heat roller and turning on or off the halogen heater lamp.
,
,
,,,
,,,,
,,,
,
,,
,,,,
,,,,,
,,,,,
,,,,
,,
,
,,,
,,
,,
,,,,
,,
,
,
,
,
Fig. 2.31
Pressure roller
Thermistor ASSY
Halogen heater lamp
Heat roller
Cleaner ASSY
Summary of Contents for HL-1070 - B/W Laser Printer
Page 1: ......
Page 20: ...II 4 Fig 2 4 ...
Page 24: ...II 8 1 3 5 DRAM Four 16Mbit DRAM x 16bit are used as the printer memory Fig 2 7 ...
Page 28: ...II 12 1 3 11 Engine I O Fig 2 14 and 2 15 show the engine interface circuit Fig 2 13 ...
Page 29: ...II 13 Fig 2 14 ...
Page 64: ...III 24 4 PACKING Fig 3 39 Documents Accessories Carton Pad Pad PE sheet Bag Pad Pad Carton ...
Page 96: ...CODE UK3958 000 B48K302 1CIR NAME A 3 Appendix 3 Main PCB Circuit Diagram 1 5 ...
Page 97: ...CODE UK3958 000 B48K302 1CIR NAME A 4 Appendix 4 Main PCB Circuit Diagram 2 5 ...
Page 98: ...CODE UK3958 000 B48K302 1CIR NAME A 5 Appendix 5 Main PCB Circuit Diagram 3 5 ...
Page 99: ...CODE UK3958 000 B48K302 1CIR NAME A 6 Appendix 6 Main PCB Circuit Diagram 4 5 ...
Page 100: ...Appendix 7 Main PCB Circuit Diagram 5 5 CODE UK3958 000 B48K302 1CIR NAME A 7 ...
Page 101: ...Appendix 8 Driver PCB Circuit Diagram CODE UK3634000 B48K280CIR NAME A 8 ...
Page 106: ...Appendix 13 SR PCB Circuit Diagram CODE UK3653000 B48K284CIR NAME A 13 ...
Page 107: ...Apr 98 54U011BE0 PARTS REFERENCE LIST MODEL HL 1070 R LASER PRINTER ...
Page 241: ...APPENDIX A 11 HP LaserJet 6P EPSON FX 850 IBM Proprinter XL EPSON FX 850 PC 850 ...