Sharp Digital Copier, AL-840, AL-800 service manual Image forming process diagram

Page 16

(2) Image forming process diagram

High voltage circuit

Main charger brush

Scanning mirror

No. 1 -

No. 3 mirror

Exposure

Cleaning, charging

Lens

 

Laser diode

 

 

 

Toner

Development, residual toner collection

High voltage circuit

Paper exit

Discharging

Discharging

brush

 

FusingSeparation

Development roller

High voltage circuit

Transfer

Separation electrode

Paper feed roller

 

Paper tray

 

Paper

 

 

 

 

 

Heat roller,

 

 

Transfer charger roller

 

 

 

 

pressure roller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High voltage circuit

 

Heater lamp

 

 

 

 

 

 

 

 

 

 

 

 

The operation of this section are composed of the six processes: charging, exposure, development, transfer, separation, and discharg- ing. An OPC drum is used as the photocoductor drum. Toner is of one-component. For charging, the rotation brush is used. For trans- fer, the roller is used and virtually no generation of ozone. It is also compact. The high voltage required in this section is provided by the high voltage power PWB.

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Contents Model AL-800/840 Operating Principle Fusing/paper exit section High voltage power PWBPower PWB Scanner read sectionPaper path and imaging Copy modeImage process and data flow Data Flow Diagram Printer modePaper feed, paper transport section OutlineMajor parts PUSPE Sensor Pemp PUSPIN Sensor Paper SizeOperation Paper release operation Scanner reading section Mhps CCD CCD OUTCCD SensorWiring diagram Asic IC8 Mcupcu PWBBlock diagram Scanner writing sectionMcupcu PWB LSU PWB SyncICU PWB Image process section Image forming process diagram Photoconductor section OPCDevelopment section Transfer/separation section System diagram CPU IC5Photoconductor drum unit Developing unitTransfer charger roller Separation electrodeActual image forming process Paper Transfer roller Residual toner OPC drum OPC drum surface potential and developing bias OPC drum surface potentialModel Fusing/paper exit sectionRTH AC Power Hlon HLLComp AMP CN2Wiring diagram Drive sectionAsic CPU IC5 MEN MMT0 MMT1Electrical section Major sections operations and functionsPower PWB High voltage power PWBCopy lamp control PWB Operation PWB Copyright 1998 by Sharp Corporation
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