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II-19
2)
Exposure Stage
After the drum is positively charged, it is exposed to the light emitted from the laser unit.
Fig. 2-27
The area exposed to the laser beam is the image to be printed. The surface potential of
the exposed area is reduced, forming the electrostatic image to be printed.
1 Cycle of drum
Surface Potential (V)
+1150
+700
+400
+300
1
2
3
4
(a)
(b)
Time
1
2
3
4
Primary charging
Laser beam exposure and developing
(a) Unexposed area
( Non image area )
(b) Exposed area
( Image area )
Transfer the image to paper
Erase the residual potential
Drum
Sleeve
Fig. 2-28
Drum
Paper
Laser beam
f
lens
Polygon mirror
Motor
Lens
Laser diode
Laser detector
Laser Beam
Summary of Contents for HL-P2000
Page 1: ......
Page 27: ...II 8 1 3 8 Engine I O Fig 2 10 shows the engine interface circuit Fig 2 10 ...
Page 69: ...III 28 4 PACKING Fig 3 48 Documents Accessory carton Pad Pad Printer Bag Carton Drum Unit ...
Page 115: ...Appendix 5 Main PCB Circuitry Diagram 1 3 CODE UK3981000 B512018 CIR 1 3 NAME A 6 ...
Page 116: ...Appendix 6 Main PCB Circuitry Diagram 2 3 CODE UK3981000 B512018 CIR 2 3 NAME A 7 ...
Page 117: ...Appendix 7 Main PCB Circuitry Diagram 3 3 CODE UK3981000 B512018 CIR 3 3 NAME A 8 ...
Page 118: ...Appendix 8 Panel Sensor PCB Circuit Diagram CODE UK4010000 B48K303CIR NAME A 9 ...
Page 119: ...Appendix 9 Scanner Panel PCB Circuit Diagram CODE UK3982000 B512019 CIR NAME A 10 ...
Page 120: ...Appendix 10 Scanner Sensor PCB Circuit Diagram A 11 B512020 CIR CODE UK3983000 NAME ...
Page 170: ......
Page 249: ...APPENDIX A 9 HP LaserJet IIP EPSON FX 850 IBM Propritner XL EPSON FX 850 ...
Page 260: ...Aug 98 84U007BE0 PARTS REFERENCE LIST MODEL MFC P2000 HL P2000 R LASER PRINTER ...