Sharp AL-840, Digital Copier, AL-800 service manual Wiring diagram, Asic IC8 Mcupcu PWB

Page 12

(3) Operation

a. Wiring diagram

ASIC

IC8

MCU(PCU) PWB

 

IC112

CCDD0

 

CCDD1

 

CCDD2

A/D

CCDD3

CCDD4

5V

CCDD5

5V

CCDD6

12V

CCDD7

 

CLCNT

 

GND 1

A-GND 2

CCDOUT 3

A-GND 4

A5V

5

5V

6

12V

7

GND

8

f1

9

GND

10

f2

11

GND

12

SH-

13

GND

14

RS

15

GND

16

SP

17

GND

18

CP

19

GND

20

NC

21

GND

22

1D-GND

2A-GND

3CCDOUT

4A-GND

5A5V

65V

712V

8D-GND

9f1

10

D-GND

CCD UNIT

11

f2

12D-GND

13SH-

14D-GND

15RS

16D-GND

17SP

18D-GND

19CP

20D-GND

21NC

22D-GND

 

RAMP UNIT

 

 

 

 

 

 

 

 

 

 

CN2

 

 

1

CFL-H

 

 

2

 

 

 

3

 

 

 

4

FGND

 

 

5

PDA

 

 

6

PDK

INVERTER UNIT

7

CFL-L

 

 

 

 

CN10

 

 

 

24V

1

 

 

P-GND

2

 

 

CL-CNT

3

 

(Not used)

CL-IN

4

 

 

 

CPU

IC13

 

 

IC5

 

 

 

 

 

MRMT0

 

MRMT0

1

MRMT1

 

 

MRMT1

2

MRMT2

 

DRIVER

MRMT2

3

MRMT3

 

 

MRMT3

4

 

24V

24V-mir

5

MRPS1

 

 

 

MRPS2

 

 

 

MHPS

 

GND

1

 

 

MHPS

2

 

 

5V

3

 

 

CN1

 

1

24V

 

2

P-GND

 

 

3

ON/OFF

 

 

4

PD

 

SCANER MOTOR

 

 

 

 

 

1

GND

SCANER H.P

 

2

MHPS

 

SENSOR

 

3

5V

 

 

 

 

 

 

*Copy lamp

A cathode ray tube (Xenon lamp) is used as the light source for reading images.

To maintain the lamp light quantity at constant level, the following operations are performed.

The copy lamp light quantity sensor is provided in the scanner unit to detect the copy lamp light quantity.

The copy lamp drive voltage corresponding to the sensor output level (CLIN) is outputted.

The copy lamp is driven by the scanner lamp control PWB.

1 – 11

Image 12
Contents Model AL-800/840 Operating Principle Fusing/paper exit section High voltage power PWBPower PWB Scanner read sectionCopy mode Paper path and imagingImage 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 sectionSync Mcupcu PWB LSU PWBICU 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 potentialFusing/paper exit section ModelRTH AC Power Hlon HLLComp AMP CN2Wiring diagram Drive sectionAsic 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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