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Service Guide OL810e
Chapter 2 Operation Description
2.3.2 Electrophotographic Process
The electrophotographic processing is outlined below. The electrophotographic printing process is shown
in Figure 2-4.
1 Charging
The surface of the image drum is charged uniformly with a negative charge by applying the negative
voltage to the charge roller.
2 Exposure
Light emitted from the LED head irradiates the negatively charged surface of the image drum. The surface
potential of the irradiated portion of the image drum surface becomes lower, forming the electrostatic
latent image associated with the print image.
3 Developing and toner recovery
When the negatively charged toner is brought into contact with the image drum, it is attracted to the
electrostatic latent image by static electricity, making the image visible.
At the same time, the residual toner on the image drum is attracted to the developing roller by static
electricity.
4 Transfer
When paper is placed over the image drum surface, the positive charge which is opposite in polarity to
that of the toner, is applied to the reverse side of the paper by the transfer roller. The toner is attracted by
the positive charge and is transferred onto the paper. This results in the transfer of the toner image formed
on the image drum onto the paper.
5 Temporary cleaning
Residual toner which remains on the image drum without being transferred is evened out by the cleaning
roller and is temporarily attracted to the cleaning roller by static electricity.
6 Fusing
The toner image transferred onto the paper is fused to the paper by heat and pressure.
An electrophotographic process timing chart is shown in Figure 2-5.
Summary of Contents for OL810e
Page 12: ...4 Universal Paper Cassette 5 High Capacity Second Paper Feeder 6 Power Envelope Feeder...
Page 20: ......
Page 52: ...Base unit...
Page 65: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 131: ...Page 68 Service Guide OL810e Chapter 6 Troubleshooting...
Page 134: ...Page 70 Service Guide OL810e Chapter 6 Troubleshooting 2 2 Paper feed jam...
Page 149: ...Page 84 Service Guide OL810e Chapter 6 Troubleshooting 8 White vertical belts or streaks...
Page 150: ......
Page 167: ...Page 99 Service Guide OL810e Chapter 7 Wiring Diagrams 7 3 Resistance Check...
Page 180: ...Page 106 Service Guide OL810e Chapter A RS 232 Interface Interface Parameter Setting...
Page 181: ......
Page 184: ...Connector pin arrangement 4 Signal Level LOW 0 V to 0 8 V HIGH 2 4 V to 5 0 V 5 Specifications...
Page 228: ...Paper Inlet Jam...