Sharp AL-800, AL-840, Digital Copier service manual Operating Principle

Page 2

1. Block diagram

SCANNER (READING) SECTION

Control signal, detection signal,

[1]

drive signal, control data line

DOCUMENT

1 – 1

Image data signal line

Image (light)

Power line

Paper path line

OPERATION PWB

LAMP (LED)

KEY

MAIN MOTOR

PRINT PWB

 

COPY LAMP

 

 

 

 

 

SCANNER HOME

LIGHT QUANTITY

MIRROR

LENS

CCD

 

SCANNER

 

 

 

 

MOTOR

POSITION

SENSOR

 

 

 

 

 

SENSOR

 

 

 

 

 

 

COPY LAMP

 

A/D

CPU

 

ASIC

PARALLEL I/F

 

 

 

CONTROL PWB

MEMORY

 

ONVERTOR

 

 

 

 

 

 

 

 

 

 

 

 

ICU PWB

 

 

 

MEMORY

ASIC

 

 

 

FAN MOTOR

 

 

 

 

 

 

 

 

 

MCU (PCU) PWB

SCANNER (WRITE) SECTION

 

 

 

 

LASER

 

 

 

 

 

 

DIODO

LASER BEAM

 

 

 

 

 

 

 

 

 

 

SENSER

MOTOR

 

 

 

LENS

POLYGON

SCANNER

DRIVER

 

 

 

MIRROR

MIRROR

MOTOR

 

 

 

 

 

 

HIGH VOLTAGE POWER PWB

FUSING/PAPER EXIT SECTION

IMAGE PROCESS SECTION

PAPER FEED SECTION

TEMPERATURE

HEATER LAMP

 

 

 

PAPER FEED

PAPER

 

 

 

ROLLER

FEED

SENSOR

 

MAIN

 

 

CLUTCH

ROLLER

 

 

CHARGER

 

 

 

 

PAPER

 

 

 

DEVELOPING

PAPER WIDTH

 

PRESSURE

PHOTOCONDUCTOR

ROLLER

DETECTOR

 

EXIT

 

ROLLER

 

 

 

 

 

ROLLER

 

 

 

 

 

 

 

 

 

 

 

PAPER

 

 

 

 

PAPER EMPTY

PAPER

 

 

 

 

DETECTOR

TRAY

EXIT

HEAT

SEPARATION

TRANSFER

 

 

 

ROLLER

 

 

 

ROLLER

ELECTRODE

ROLLER

 

 

 

 

 

PAPER ENTRY

 

 

 

 

 

 

 

PAPER EXIT

 

 

 

 

DETECTOR

 

TEMPERATURE

 

 

 

 

 

DETECTOR

 

 

 

 

 

FUSE

 

 

 

 

 

 

 

 

 

 

 

HOST(PC)

PAPER

OPERATING PRINCIPLE

POWER PWB

AC POWER

Image 2
Contents Model AL-800/840 Operating Principle Power PWB Fusing/paper exit sectionHigh voltage power PWB Scanner read sectionImage process and data flow Copy modePaper path and imaging Data Flow Diagram Printer modeMajor parts Paper feed, paper transport sectionOutline PUSPIN Sensor PE Sensor PempPUS Paper SizeOperation Paper release operation Scanner reading section CCD MhpsCCD CCD OUT SensorWiring diagram Asic IC8 Mcupcu PWBBlock diagram Scanner writing sectionICU PWB SyncMcupcu PWB LSU PWB Image process section Image forming process diagram Photoconductor section OPCDevelopment section Transfer/separation section System diagram CPU IC5Transfer charger roller Photoconductor drum unitDeveloping unit Separation electrodeActual image forming process Paper Transfer roller Residual toner OPC drum OPC drum surface potential and developing bias OPC drum surface potentialRTH Fusing/paper exit sectionModel Comp AC PowerHlon HLL AMP CN2Asic Wiring diagramDrive section CPU IC5 MEN MMT0 MMT1Electrical section Major sections operations and functionsCopy lamp control PWB Operation PWB High voltage power PWBPower PWB Copyright 1998 by Sharp Corporation
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