Sharp Digital Copier, AL-840, AL-800 service manual Copyright 1998 by Sharp Corporation

Page 31

COPYRIGHT © 1998 BY SHARP CORPORATION

Printed in Japan.

No part of this publication may be reproduced, stored in a retrieval system, or transmitted.

In any form or by any means,

electronic, mechanical, photocopying, recording, or otherwise,

without prior written permission of the publisher.

Printing Reprographic Systems Group

Quality & Reliability Control Center

Yamatokoriyama, Nara 639-1186, Japan

1998 October Printed in Japan S

Image 31

Contents Model AL-800/840 Operating Principle Scanner read section Fusing/paper exit sectionHigh voltage power PWB Power PWBPaper path and imaging Copy modeImage process and data flow Printer mode Data Flow DiagramPUS Paper feed, paper transport sectionOutline Major partsPaper Size PE Sensor PempPUS PIN SensorOperation Paper release operation Scanner reading section Sensor MhpsCCD CCD OUT CCDAsic IC8 Mcupcu PWB Wiring diagramScanner writing section Block diagramMcupcu PWB LSU PWB SyncICU PWB Image process section Image forming process diagram OPC Photoconductor sectionDevelopment section Transfer/separation section CPU IC5 System diagramSeparation electrode Photoconductor drum unitDeveloping unit Transfer charger rollerActual image forming process Paper Transfer roller Residual toner OPC drum OPC drum surface potential OPC drum surface potential and developing biasModel Fusing/paper exit sectionRTH AMP CN2 AC PowerHlon HLL CompCPU IC5 MEN MMT0 MMT1 Wiring diagramDrive section AsicMajor sections operations and functions Electrical sectionPower PWB High voltage power PWBCopy lamp control PWB Operation PWB Copyright 1998 by Sharp Corporation

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