Sharp AL-840, Digital Copier Paper feed, paper transport section, Outline, Major parts, Pus

Page 6

3. Operations of each section

A. Paper feed, paper transport section

(1) Outline

The paper feed tray contains about 200 (250) sheets of paper.

The paper is passed to the transfer section by the paper feed roller.

The paper feed operation is controlled by the paper feed roller clutch and the paper feed roller clutch solenoid. The paper feed clutch employs the mechanical spring clutch.

Paper mis-feed and paper jam are detected by the paper empty sensor and the paper entry sensor. The paper size (width) is detected by the paper size (width) detector to prevent toner from attaching to the area over the paper width.

(2) Major parts

2)

1) PE SENSOR

3)

9) PAPER SIZE SW

 

10)

11)

4)

4)

 

 

5) PUS

8)

 

6)

6)

 

 

 

 

7) PIN SENSOR

 

 

 

13)

12)

13)

 

 

 

 

14)

16)

 

 

16)

19)

 

18)

 

15)

8)

 

 

 

12)

 

17)

 

 

 

19)

 

1 – 5

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Contents Model AL-800/840 Operating Principle Power PWB Fusing/paper exit sectionHigh voltage power PWB Scanner read sectionCopy mode Paper path and imagingImage process and data flow 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 sectionSync Mcupcu PWB LSU PWBICU 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 potentialFusing/paper exit section ModelRTH Comp AC PowerHlon HLL AMP CN2Asic Wiring diagramDrive section CPU IC5 MEN MMT0 MMT1Electrical section Major sections operations and functionsHigh voltage power PWB Power PWBCopy lamp control PWB Operation PWB Copyright 1998 by Sharp Corporation
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