Developing Process - Muratec F-110 Field Engineering Manual

Circuit Description

4-4-2. Developing Process

4-4-2-1 Feeder
Engine operates this unit. Solenoid rotates the feed roller and feeds one paper. Then the paper is fed into the set and hits the
actuator of the feed sensor. At this point, the engine detects the signal and prepares to spray according to the image data. If
any problem happens to this feed sensor operation, the system displays "paper jam error" on the OP panel.
Also, feed sensor unit is closely related to the paper margin.
4-4-2-2. Electrifier
This unit electrifies consistent negative voltage to OPC. When the high negative voltage (-1550V) is allowed to charge roller,
the OPC drum surface will be consistently electrified with approximately +1300V. This is the first process in generating the dig-
ital picture.
4-4-2-3. Exposer
After receiving bitmap image data from engine board, LSU turns the laser diode either on or off depending on whether the dig-
ital data is present or absent in order to expose the OPC drum with the switched laser beam data. The difference between the
voltages generated at this point is presented above. In other words, the part exposed to the laser will have -50V and its rela-
tive electric potential will increase and form electrostatic
latent image.
The part unexposed to the laser as it did not have the video data will consistently retain -800V. Eventually, the image will form
in the part electrified and rose to -50V(forms black dot) and the part retaining -800V will be white in order to make the basic
condition to form the video data.
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