Sharp AL-800, AL-840, Digital Copier service manual Photoconductor section, Opc

Page 17

(3) Major parts

a. Photoconductor section

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			4)
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No.			Parts		Note
No.	Name	Type	Function/operation		Note
	Name	Type	Function/operation
1	OPC drum	OPC	Forms latent electrostatic images.
2	OPC drum earth electrode		Connects the OPC drum aluminum layer and
			the earth (high voltage PWB).
3	Main charger electrode		Connects the main charger output (high
			voltage PWB) and the main charger brush.
4	Discharge brush		Discharges (lower the potential of) the OPC		Japan only
			drum surface.
5	Main charger brush		Charges the OPC drum.
6	Toner seal		Shield to prevent toner from leaking outside
			the OPC drum unit.

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Image 17

Contents Model AL-800/840 Operating Principle High voltage power PWB Fusing/paper exit sectionPower PWB Scanner read sectionImage process and data flow Copy modePaper path and imaging Printer mode Data Flow DiagramOutline Paper feed, paper transport sectionMajor parts PUSPUS PE Sensor PempPIN Sensor Paper SizeOperation Paper release operation Scanner reading section CCD CCD OUT MhpsCCD SensorAsic IC8 Mcupcu PWB Wiring diagramScanner writing section Block diagramICU PWB SyncMcupcu PWB LSU PWB Image process section Image forming process diagram OPC Photoconductor sectionDevelopment section Transfer/separation section CPU IC5 System diagramDeveloping unit Photoconductor drum unitTransfer charger roller Separation electrodeActual image forming process Paper Transfer roller Residual toner OPC drum OPC drum surface potential OPC drum surface potential and developing biasRTH Fusing/paper exit sectionModel Hlon HLL AC PowerComp AMP CN2Drive section Wiring diagramAsic CPU IC5 MEN MMT0 MMT1Major sections operations and functions Electrical sectionCopy lamp control PWB Operation PWB High voltage power PWBPower PWB Copyright 1998 by Sharp Corporation

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