SHARP ARC360 Service Manual

SERVICE MANUAL

COLOR LED PRINTER

MODEL AR-C360P

SHARP CORPORATION

11.

01.2005

This document has been published to be used for after sales service only. The contents are subject to change without notice.

Document Revision History

Ver. Date

No.

Revision

In-Charge

Page Changes

Rev. 1 2 /

Preface

This manual describes the procedures of the maintenance of the AR-C360P printer.

The document is produced for maintenance personnel use.

Note!

• The descriptions in this manual are subject to change without prior notice.

• In preparing the document, efforts have been made to ensure that the information in it is accurate.

• The parts used for the printers are sensitive and, if handled improperly, may be damaged. It is strongly recommended that the products are maintained by maintenance men registered with Sharp Electronics Corporation.

• Errors may be crept into the document. Sharp assumes no responsibility for any damage resulting from, or claimed to be the results of, those repairs, adjustments or modifications to the printers which are made by users using the manual.

Rev. 1 3 /

In order to use the product with safety

In order to use the product with safety, make sure to read the user's manual (this manual) before using the product.

General Caution

Do not touch the safety switch of the internal parts of the printer. Electric shock may occur due to the occurrence of high pressure. The rotation of the gear may also cause injury. Do not use an extremely flammable spray around the printer. Fire may occur because of parts with high temperature.

Please let our staff in Customer Center know after unplugging mains connector when the cover gets extremely hot, is smoking, emits questionable odor, or is making strange noise. Fire may occur. Please let our staffs in Customer Center know after unplugging mains connector when liquid such as water goes into the printer. Fire may occur.

Please take a foreign object away after unplugging when you drop foreign objects such as clips into the printer. That situation may case electric shock, fire, and/or injury.

Do not conduct an operation or an analysis other than specified in user's manual. That situation may case electric shock, fire, and/or injury.

Please let our staffs in Customer Center know after unplugging mains connector when the printer has fallen down or damaged. That situation may case electric shock, fire, and injury. Do not connect the power cord, the printer cable, or the ground wire other than instructed in user's manual. Fire can be induced if misused.

Do not insert objects at the vent hole. Do not operate the printer with the rear cover opened. Electric shock, fire, and/or injuries may occur.

Do not place a cup with liquid on the printer. Electric shock, fire, and/or injuries may occur.

Risk of explosion if battery is replaced by an incorrect type. Battery of the printer need not to be replaced. Do not touch the battery. Replace the whole board to replace the CU main board. In the case of replacing batteries at board repairs, replace with the specified type ones. stallation of another type batteries may result in explosion. Caution for used batteries are as follows; do not recharge, force open, heat or dispose

of in fire. When open the printer cover, do not touch the fuser unit. You may get burned.

In-

Do not throw toner cartridges, or image drum cartridges into fire. You may get burned by dust explosion.

Rev. 1 4 /

Do not go near an ejection area while the power is on and in printing. You may get injured.

Rev. 1 5 /

Table of contents

1. Configuration .................................................................................................10

1.1 System Configuration ................................................................................................... 10

1.2 Printer Composition ...................................................................................................... 11

1.3 Optional Composition ................................................................................................... 12

1.4 Specifications ...............................................................................................................14

2. Descriptions of Operations..........................................................................16

2.1 Main Control PCB ........................................................................................................ 17

2.2 Engine Control PCB (S2V PWB) ................................................................................ 20

2.3 Power Unit .................................................................................................................... 21

2.4 Mechanical process ..................................................................................................... 22

2.4.1 Electrophotographic Processing Mechanism .................................................. 23

2.4.2 Paper Processing Mechanism ......................................................................... 27

2.5 Sensor .......................................................................................................................... 36

2.5.1 Paper-Related Sensor ..................................................................................... 36

2.5.2 Other Sensors ................................................................................................. 37

2.6 Color Drift Correction ................................................................................................... 38

2.7 Image Transfer Control According to Environmental Change (Room Temperature and

Relative Humidity) ........................................................................................................ 38

2.8 Paper Jam Detector ......................................................................................................39

2.9 Cover Open .................................................................................................................. 41

2.10 Toner Low Detection ................................................................................................... 41

2.11 Paper Size Detection ................................................................................................... 44

2.12 Power ON Process ...................................................................................................... 45

2.12.1 Self-Diagnostic Test ......................................................................................... 45

2.13 Color Drift Detection .................................................................................................... 46

2.14 Reading Version of Routine Replacement Units ........................................................ 47

2.15 Life Counter of Replaceable Units .............................................................................. 47

2.16 Toner Usage Level Detection ...................................................................................... 47

3. General Handling Operations ...................................................................... 48

Details undecided. ................................................................................................................... 48

4. Parts Replacement ........................................................................................49

4.1 Precautions When Replacing Parts .............................................................................49

4.2 Parts Layout .................................................................................................................51

4.3 Parts Replacement Method ......................................................................................... 67

4.3.1 Cover-Rear, Cover-Side (R), and Cover-Side (R) Rear ...................................... 68

4.3.2 Cover-Side (L) and Cover Assy-Front ..............................................................69

4.3.3 Stacker Assy-FU.............................................................................................. 70

4.3.4 Cover Assy-OP Panel, Cover-Guard (R), Cover-Guard (Front) and

Cover-Guard (L) .............................................................................................. 71

4.3.5 OP PCB ........................................................................................................... 72

4.3.6 Cover Assy-Top ............................................................................................... 73

4.3.7 FAN-PCB-Assy, CU-Board-Assy and S2V-PU-Board ..................................... 74

4.3.8 Job-Offset-Assy 723 and Basket-Assy ............................................................ 75

4.3.9 Plate Top Assy ................................................................................................. 76

Rev. 1 6 /

4.3.10 Eject-Assy ....................................................................................................... 77

4.3.11 Motor-Pulse-Belt and Sensor-Resist-Assy ...................................................... 78

4.3.12 FDR Unit-MPT ..................................................................................................79

4.3.13 FDR Unit-Resist .............................................................................................. 80

4.3.14 Duct Assy ........................................................................................................ 81

4.3.15 HV-Assy ........................................................................................................... 82

4.3.16 Power Unit ......................................................................................................... 83

4.3.17 Low Voltage Power Source Assy and Motor-FAN ........................................... 84

4.3.18 Belt-Assy ......................................................................................................... 85

4.3.19 Fuser Unit-LBT ................................................................................................ 86

4.3.20 Unit-Duplex ...................................................................................................... 87

4.3.21 Paper Feed Roller ........................................................................................... 88

5. Adjustment .....................................................................................................90

5.0 System Maintenance Menu ......................................................................................... 90

5.0.1 ID Check Pattern Print (“TEST PRINT MENU” Item) ...................................... 92

5.1 Maintenance Menu and Its Function .......................................................................... 92

5.1.1 Maintenance Menu .......................................................................................... 92

5.1.2 Engine Maintenance Mode .............................................................................. 94

5.1.2.1 Operation Panel .............................................................................. 94

5.1.2.2 Regular Self-Diagnosis Mode (Level 1) .......................................... 95

5.1.2.2.1 How to Enter Self-Diagnosis Mode (Level 1) ............... 95

5.1.2.2.2 Escape from Self-Diagnosis Mode .............................. 95

5.1.2.3 Switch Scan Test ............................................................................. 96

5.1.2.4 Motor/Clutch Test .......................................................................... 100

5.1.2.5 Test Print ....................................................................................... 104

5.1.2.6 Initialize NVM ................................................................................ 108

5.1.2.7 Consummable Parts Counter Display ........................................... 109

5.1.2.8 Consumable Continual Counter Display ....................................... 109

5.1.2.9 Panel Display Details .....................................................................110

5.1.3 Various Printing Methods with a Stand-Alone Printer Coming with a Controller 115

5.2 Adjustment After Replacing Parts ............................................................................. 116

5.2.1 Precautions when Replacing the Engine Control PCB................................... 116

5.2.2 Precautions Upon EEPROM Replacement ....................................................116

5.2.7 Replacement of the CU Board and Onboard Devices for the 1200-dpi System 119

5.2.8 Precautions When Replacing the KeyChip (1200dpi Model) ......................... 119

5.2.9 Precautions When Replacing the HDD (1200dpi Model) ............................... 119

5.2.10 How to Set Clock (1200dpi Model) ................................................................. 119

5.3 Density Correction ...................................................................................................... 120

Routine Replacement ................................................................................. 121

6.1

6.2

6.3

6.4

Rev. 1 7 /

Routine Replacement of Consumable Parts ............................................................ 121

Cleaning...................................................................................................................... 121

LED Lens Array Cleaning .......................................................................................... 121

Pickup Roller Cleaning .............................................................................................. 121

7. Malfunction Repair Procedure ..................................................................122

7.1 Precautions Before Repairs ....................................................................................... 122

7.2 Items to Check Before Remedying Abnormal Image .............................................. 122

7.3 Precautions Before Remedying Abnormal Image .................................................... 122

7.4 Troubleshooting Preparations .................................................................................... 122

7.5 Troubleshooting .......................................................................................................... 122

7.5.1 LCD Message List ......................................................................................... 123

7.5.2 Preparing for Troubleshooting ....................................................................... 133

7.5.3 Troubleshooting With Abnormal Image ......................................................... 146

7.6 Check Fuse ................................................................................................................ 162

8. Connection Diagram ...................................................................................163

8.1 Check Resistance Value............................................................................................ 163

8.2 Diagram of Part Layout of Various PCB .................................................................. 169

9. Interface Specifications ..............................................................................175

9.1 Parallel Interface Specifications ................................................................................ 175

9.1.1 Parallel Interface Overview ........................................................................... 175

9.1.2 Parallel Interface Connector and Cable ........................................................ 175

9.1.3 Parallel Interface Level .................................................................................. 175

9.1.4 Timing Chart .................................................................................................. 180

9.1.5 Parallel Interface Signal ................................................................................ 181

9.2 USB Interface Specifications ..................................................................................... 182

9.2.1 USB Interface Overview ................................................................................ 182

9.2.2 USB Interface Connector and Cable ............................................................. 182

9.2.3 USB Interface Signal ..................................................................................... 182

10. Error message list ......................................................................................183

Rev. 1 8 /

Rev. 1 9 /

1. CONFIGURATION

1.1 System Configuration

Figure 1-1 illustrates the System Configuration of this printer.

Motor

Geared

DC motor

Hopping

MT/

Resist

K ID

Pulse Motor

Y ID

C ID

Paper Conveyor Sensor

Paper Size Detector

Fuser Temperature Detector

Ambient Temperature/Humidity Detector

Remaining Toner Level Detector

<Sensor, Switch and Thermistor>

ID, Belt, Fuser Check

Heavy Paper Sensor

Density Sensor

Color Drift Sensor

LED Head

Operation Panel

Belt

Fuser M ID

M M

Connection PCB

IDE

HDD

Job

Offset

Paper Tray

2nd/3rd Tray

Large-Volume

Printer Unit

Double-Side

C-ID UnitM-ID UnitY-ID Unit K-ID Unit

Power Unit

High Voltage

Figure 1-1

Engine Controller

Power Unit

Low Voltage

DC FAN

Fuser Unit

Belt Unit

Area

Control

SDRAM DIMM 2

1200dpi PCB (ASP)

USB

Centro

Ethernet

Rev. 1 10 /

1.2 Printer Composition

The internal part of the printer consists of the following parts.

• Digital Photo Processor

• Paper Travel Path

• Control Unit (CU and PU)

• Operation Panel

• Power Source (High Voltage Area/Low Voltage Area)

Figure 1-2 illustrates the printer composition.

Figure 1-2

Rev. 1 11 /

1.3 Composition

This printer comes standard with the following options.

Double-Side Printer Unit

Large-Volume Paper Tray

Additional Memory: 512MB

Internal Harddisk

Rev. 1 12 /

Finisher Unit (AR-C36TF)

2/3 Hole Punch Unit (AR-C36HP)

(No Image)

Rev. 1 13 /

1.4 Specifications

(1) Dimensions (H × W × D): 462 mm × 640 mm × 615 mm

(2) Weight: 65 kg

(3) Paper

Paper Type: Regular paper and transparency

Paper Size: Post Card, Legal 13”or 14”, Executive, A4, A5, B5, A6,

Continuous Paper Feed: 1st Tray : 55 kg to 172 kg (64 to 203g/m

(4) Print Speed

Color: 36 ppm (OHP: 10 ppm) Monochrome: 40 ppm (OHP: 15 ppm)

(Recommended: ML OHP01)

A3, A3 Nobi, B4 (However, A6 and Post Card:1stTray and Front Feeder only)

Front Feeder : 55 kg to 172 kg (64 to 203g/m

)

Post Card, Label, Heavy Paper:

15 ppm

(5) Resolution: 1200 × 600/4bit gray scale

(6) Input Power: 100VAC ±10%

(7) Power Consumption Peak : 1500W

Normal : 750W average (Reference value) Idle : 200W (Reference value) Power Save Mode : 55W

(8) Frequency: 50/60Hz ±2Hz

(9) Noise

During Operations: 55dB (when second tray is not attached) Standby Time: 45 dB Power Save: 43 dB

(10) Life of Consumables

Toner Cartridge: 7,500 pages (5% Duty) Large-Volume Toner Cartridge: 15,000 pages (5% Duty) (Y, M, C, K each) Imaging Drum: 42,000 page (5% Duty, Continuous Printing)

or 30,00 pages (for 3P/J)

(11) Routine Replacement of Consumable Parts

Fuser Unit Assy: 100,000 pages

Transfer Belt: 100,000 pages Waste Toner Box: 30,000 pages

Rev. 1 14 /

(12) Temperature and Relative Humidity Temperature

Temperature Conditions

Operating

Not Operating

Storage (1 Year Max)

Transport (1 month Max)

Relative Humidity

Operating

Not Operating

Temperature

(°F)

50 to 89.6

32 to 109.4

-14 to 109.4

-20 to 122

Temperature

(°C)

10 to 32

0 to 43

-10 to 43

-29 to 50

Relative Humidity Conditions

Relative Humidity

(%)

Maximum Web Bulb

Temperature (°C)

20 to 80

10 to 90

26.8

Remarks

17 to 27 °C (Temperature guaranteeing full-color print quality)

Power OFF

Drum and Toner: Yes

Drum: Yes/Toner: No

Drum and Toner: Yes

Remarks

50-70% (Temperature guaranteeing full-color print quality)

Power OFF

Storage

Transport

10 to 90

Rev. 1 15 /

Rev. 1 16 /

2.1 Main Control PCB

Main Control PCB (ASP-PWB) (1200dpi)

Figure 2-2-1 illustrates the block diagram of the Main Control PCB (ASP PWB).

+1.8V

LT1764EQ

3.3V to 1.8V

+3.3V

ENG_CLK

CLK

VCLK2 SERIAL-

+2.5V

Regulator

5V to 2.5V

LTC3412EFE

+5.0V

nomount

X’tal

30.000

EEPROM

MHz

PCI

PCICLK

Slot

100pin

USB

USB2.0

NET2280

HW_

RESET-N

PCICLK3

Connector

120pinTQFP

+2.5V

+3.3V

Connector

IEEE1284

+5.0V

PCI

Slot

68pin

Regulator

PLLVDD

CVDD

PCICLK2

COREGOOD

PLVDD

MAX1718

5V to CVDD

StepDownCont

+5.0V

I/F

Engine

WDATA0/1/2/3

256pinBGA

Xilinx FPGA

XC2S200E-6FT256C

+3.3V

LM2636

Regulator

5V to 3.3V

+5.0V

Clock Generator

CY27EE16FZEC

14.318MHz

Crystal oscillator

W83783S

FAN Control

S_A[12:0]

8Mbit Flash

Resident 256MByte

+3.3V

Microwire

2kbit EEPROM

S_DQ[63:0]

DDR

512Mbit

PCICLK6

SDRAM

+2.5V

LED

XC9572XL

Xilinx FPGA

100pinTQFP

+3.3V

HW_RESET-N

CPU

TM5800

474pinCBGA

C_A[12:0]

C_DQ[63:0]

SDRAM DIMM

+3.3V

Parallel

74LVX161284

ASIC1

144pinPQFP

PCICLK1

+3.3V, 2.5V, CVDD, PLLVDD

+2.5V

CVDD

PLLVDD

+3.3V

CPU Sideband PCI_AD[31:0]

VIDEO_0/1/2/3

PCICLK5

PCI_CLK_CPU 33MHz

CPU_CLK 66MHz

Clock Gen

X’tal

14.318MHz

LPC BUS

ASIC2

256Kbit

I2CROM

PCI_CLK_SB=33MHz

CLK14MCLK48M

0.75% Center-spread

+3.3V

+2.5V

+1.8V

+3.3V

544pinPBAG

+1.8V

+3.3V

2Mbit

Boot Flash

+5.0V

XD[7:0]

SA[19:0]

PCI_CLK[6:0]

4MByte

Resident

BRDATA0[31:0]

BRDATA1[31:0]

BRDATA2[31:0]

BRDATA3[31:0]

Primary IDE

CompactFlash

P_DA[2:0]

P_DD[15:0]

M1535+

353pinBGA

SouthBridge

XD[7:0]

RTC

X’tal

32.768MHz

VCLK0/1

64MB

+5.0V

+3.3V

8Mbit

PIPELINED

Battery

SRAM

+3.3V

HDD 2.5inch

S_DA[2:0]

S_DD[15:0]

+2.5V

ICLK_VXP

MCLK_VXP

Clock Generator

0/1/2/3

MCLK_SRAM

20GB

Secondary IDE

+5.0V

+3.3V

+5.0V

14.318MHz

Crystal oscillator

CY27EE16FZEC

+3.3V +3.3V

HW_RESET-N

LEUS-T

MAX811

Reset IC

+5.0V

Figure 2-2-1

Rev. 1 17 /

The Main Control PCB of the 1200dpi printer consists of a CPU, RAM, HDD, CompactFlash, SouthBridge LSI, EEPROM, KeyChip, PCI Bus Option and Advanced Interface.

(1) CPU

1GHz Transmeta TM5800 CPU.

(2) RAM

There are 3 types of RAMs. SDRAM DIMM is the only user option RAM. The DDR and video RAM configuration is fixed and cannot be modified. Only the total memory of the DDR and SDRAM DIMM is recognized as a usable RAM within the system configuration.

DDR : This is 256MB and 266MHz in speed, and directly soldered on the ASP PCB.

SDRAM DIMM : 128, 256, and 512MB; 133MHz speed, 144p DIMM mounted in DIMM slot.

Video RAM : RAM that is directly soldered on ASP PCB for the video LSI.

(3) HDD/CompactFlash

The 1200-dpi program is stored in a storage medium. Depending on the model, the system is equipped with HDD or CompactFlash. However, HDD may be added as an option to a model with CompactFlash. HDD is a mold assembly similar to the one for the 600-dpi system.

(4) SouthBridge LSI

This is a ALI-make BGA package LSI. It mainly controls the USB I/F, Centro I/F, image processing LSI, Ethernet board, and MFP extension board via the PCI bus.

(5) Image Processing LSI

This is an EFI-make BGA package LSI. It is mainly for image processing.

(6) EEPROM

This is a 3.3V/256kbit EEPROM with an 8-pin DIP package mounted on the IC socket. It stores various settings that the control unit manages.

(7) KeyChip

The KeyChip is an 8-pin DIP package mounted on the IC socket. It is purchased from EFI and stores EFI management information.

(8) PCI Bus

100-pin: An MFP extension board is available as optional equipment.

68-pin: A LAN card is provided as standard equipment.

(9) Advanced Interface

Standard :Centronic Parallel I/F (IEEE-1284)

USB (USB2.0) I/F

Ethernet Board

Additional PCB : MFP Extension Board (PCI BUS Connection)

Rev. 1 18 /

Rev. 1 19 /

2.2 Engine Control PCB (S2V PWB)

Figure 2-3 illustrates the block diagram of the Engine Control PCB (S2V PWB).

Toner

Supply

Motor MC

Fuser

C-ID

M-ID

Y-ID

K-ID

Motor

999

Motor

Toner

Supply

BELT

Motor

Job

Offset

Toner

Disposal

Motor KY

Motor

FAN

Power

UNIT

LV-POWER

BELT

FAN

RFID

Regist

Tray1

/MPT

PU-

Motor

Geared

1st Regist

Registration

Board

Cover

Motor

Clutch

Shutter

(fuse)

Thermister*4

FUSER UNIT

MPT

1st Paper

Size SW

Waste toner

Hole IC

Waste toner

Box Hole IC

Belt

Hole IC

Driver

Tray1/MPT

Motor driver

Regist Motor

SUB

CPU

DUPLEX UNIT

BELT

Motor

Driver

19.66MHz

BOARD-MOTOR-DRIVER (S2M)

TonerSupply

Motor Driver

JobOffset/

Motor Driver

TonerSupplyMC

2nd Regist

Clutch

ENV Sensor

WR IN2

BOARD-

FRONT-SENSOR

(S2S)

BOARD-

Hum/Temp

END

PAPER

1st Paper

Near END

1st

Lifter

(S2C)

Media weight

MPT

Paper End

Hopping

TRAY-SENSOR

OHP

Sensor

MPT Paper

END

MPT Home

Position

1st

Cover

IN1

1st

Hopping

C LED HEAD

M LED HEAD

(S2H)

Y LED HEAD

K LED HEAD

44 44

BOARD-LED-HEAD-POWER-RELAY

100

10 10 10 10

COCOA

ASIC

COCOA

ASIC

COCOA

ASIC

COCOA

(S2R)

SENSOR

Job offset

BOARD-REAR-

Cover

Left

FAN

Position

FAN

Fuser

Unit

Contoroller

(X7G)

Solenoid

BOARD-

EXIT

Facedown

OPERATION PANEL

Stacker

Full faceUP

Stacker Full

faceDown

Job offset

ASIC

19MHz

paper end

Cover

Face UP

(top)

32kbit

SRAM

Flash

8Mbit

PU-BOARD

CPU

ASIC

MCON

28MHz

EEPROM

(S2V)

Short Plug

PCB

C-ID

UNIT

(fuse)

M-ID

Y-ID

K-ID

FAN

UNIT

(fuse)

(front)

Eraser

PCB

Eraser

PCB

Eraser

PCB

Eraser

Toner

Supply

UpDown

Toner

Supply

Toner-C

Sensor

Toner-M

Sensor

Toner-Y

Sensor

Toner-K

Sensor

3 3 3

C-Drum

Phase

(SGG)

M-Drum

Phase

Y-Drum

Phase

BOARD-CARTRIDGE-SENSOR

K-Drum

Phase

(S2J)

OPTIONAL

TRAY UNIT

UNIT

HV-POWER

Aligment

Right

Aligment

Left

BOARD-

REGIST-SENSOR

(S2Z)

23 3

FINISHER/

Disposal

COVER

INVERTER UNIT

Disposal

Toner Full

Hole IC

Toner Box

Upper

(fuse)

BELT UNIT

Density

Sensor

Slack

Paper

Fuser

release

Figure 2-3

Rev. 1 20 /

2.3 Power Unit

This is a high voltage power unit consisting of high voltage power source circuit and a low voltage power unit composed of a power unit consists of an AC filter circuit, low voltage power source circuit and heater drive circuit.

(1) Low Voltage Power Unit

This circuit generates the following voltage.

Output Voltage

+5V (1) +5V (2) +5V (3)

+24V

PU, Logic Circuit Power Source LED Head CU For Monitor Drive

Purpose

(2) High Voltage Power Unit

This circuit generates the following voltage that is more powerful than +24V necessary for the electrophotographic process, according to the control sequence from the control PCB.

Output

CH DB SB BB TR

-0.8 to -1.4kV

-100 to -450V/250V

-300 to -700V Drop from SB Output with Zener 0 to 7kV

Voltage

Purpose

Power to Electrification Roller Power to Development Roller Power to Toner Supply Roller Power to Development Blade Power to Transfer Roller

Remarks

Rev. 1 21 /

2.4 Mechanical process

Figure 2-4 illustrates the mechanical process of the AR-C360P.

tray

Multi purpose

Paper

cassette

Feeding

(MT, 1ST, 2ND)

Hopping roller

YMC

× 4

Control signal

LED head

Power supply

Exposure

Electrification

Toner

Paper feed sensor 1

container

roller

Development

Paper feed sensor 2

Development

Cleaning

regist

Paper

regist

Paper

Transfer

Regist roller 1Regist roller 2

Light sensor

Transfer roller

Power

supply

A motion of a paper

OPC drum rotation

roller

Discharge

(Face down)

Power supply

roller

Electrification

Cleaning blade

Backup roller

selection

Paper path

Fixing

Heat roller

roller

Discharge

Discharge Fixing Cleaning Transfer Paper conveyance Paper advance

(Face up)

Discharge

Discharge sensor

Figure 2-4

Rev. 1 22 /

2.4.1 Electrophotographic Processing Mechanism (1) Electrophotographic process

The overview of the electrophotographic process is described below.

1 Electrification

DC power is applied to the CH roller to evenly negatively electrify the surface of the OPC drum.

2 Exposure

The LED head irradiates light on the surface of the OPC drum that is charged with a negative electrical load. The negative electrical load attenuates according to the intensity of light, for the irradiation area of the OPC drum surface. Further, the electrostatic latent image is created on the OPC drum surface according to the electrical potential.

3 Development

The negatively charged toner comes in contact with the OPC drum to fuse the electrostatic latent image by electrostatic force, to create a significant image on the surface of the OPC drum.

4 Transfer

Paper is pressed against the surface of the OPC drum, then conveyed by the transfer roller from behind. The toner and positive electrical load of a reverse electrode is applied, then the toner image is transferred to the paper.

5 Cleaning

The cleaning blade removes residual toner on the OPC drum after the toner is transferred to the paper.

6 Fuser

Heat and pressure is applied to the toner image on the paper to fuse the image on the paper.

Rev. 1 23 /

(2) Electrification

A negative DC power is applied to the electrification roller to evenly negatively electrify the surface of the OPC drum.

Power supply

unit

Electrification roller

OPC drum

(3) Exposure

Power supply

unit

Electrification roller

OPC drum

LED head

Paper

LED head

OPC drum

Rev. 1 24 /

(4) Development

The negatively charged toner comes in contact with the OPC drum to fuse the electrostatic latent image by electrostatic force, to create a significant image on the surface of the OPC drum.

1 The sponge roller precipitates toner on the development roller. The toner is then

negatively electrified.

Electrification roller

Development blade

Sponge roller

OPC drum

Development roller

2 The development blade removes excess toner from the development roller, then a

thin toner layer is created on the development roller.

3 The toner is sucked into the electrostatic latent image where the OPC drum and

development roller comes in contact.

(5) Transfer

The transfer roller is made of a conductive sponge. Paper is pressed against the OPC drum surface, then the paper and OPC drum surface is adhered.

Paper is pressed against the surface of the OPC drum, then conveyed by the transfer roller from behind. The toner and positive electrical load (that is reverse with the toner) is applied, then the toner image is transferred to the paper.

When the power source applies powerful positive power on the transfer roller, the positive electrical load induced by the transfer roller is transferred to the paper surface at the contact point between the transfer roller and paper. The negative electrical load toner is then sucked from the OPC drum surface on to the paper surface.

OPC drum

Paper

Transfer roller

Rev. 1 25 /

Conveyance belt

Power

supply

unit

(6) Fuser

The toner image transferred on the paper is fused on the paper by heat and pressure when the paper passes through the heat roller and backup roller.

The Teflon coated heat roller is heated by a 800W or 350W internal halogen lamp, and backup roller is heated by a 50W internal halogen lamp. The fuser temperature is controlled according to the sum of the temperature that is not contacted with the thermistor ground against the heat roller surface and the temperature that is detected with the thermistor ground on the backup roller surface. There is also a thermostat for safety purposes. When the heat roller temperature rises above a certain temperature, the thermostat opens and shuts down the power supplied to the heater. The backup roller unit is pressed against the heater with a press spring on both sides.

Thermostat

Thermistor

Paper

Backup roller

Backup roller unit

Fuser belt

Thermistor

Thermostat

Heat roller

Pat

(7) Cleaning

The cleaning blade scrapes off residual toner on the OPC drum after the toner is transferred to the paper, then the disposal toner of the disposal toner box is collected at the rear.

(8) Cleaning

The cleaning blade scrapes off residual toner on the transfer belt then collects is in the disposal toner box of the transfer belt unit.

Cleaning braid

Disposal Toner Box

Rev. 1 26 /

2.4.2 Paper Processing Mechanism

Figure 2-5 illustrates how the paper transfers through the AR-C360P.

Face down stacker

Discharge roller

Backup roller

Fuser assembly

Heat roller

Cassette 1

Cassette 2

Cassette 3

Low-pressure power supply

Belt unit

Head x4

High-pressure

power supply

Unit x4

Regist roller Assy (B)

Hopping roller

Multipurpose tray

Cleaning blade

Regist roller Assy (A)

Transfer roller

Feed roller

Cassette 4

Cassette 5

Figure 2-5 Paper Path

Rev. 1 27 /

(1) Paper Supplied from the 1st Tray

1. Paper proceeds when the paper supply motor turns (CCW) and the paper supply clutch is connected, until the IN1 sensor turns ON.

2. When the IN1 sensor is turned ON, a certain volume of paper is further transported until it is against the 1st resist roller. (this corrects paper skew)

3. The paper is transported to the transport belt when the electromagnetic clutch which delivers power that the register strike motor is turning (CW) and the thrust reliance of a paper is completed to the 1st register strike roller is connected.

2nd regist roller

Write sensor

IN2 sensor

Middle transport roller

The clutch of

electromagnetism

Pickup roller

Feed motor

Feed roller

Paper

The clutch of

electromagnetism

Feed sensor

Retard roller

Figure 2-6

1st regist roller

IN1 sensor

Regist motor

Rev. 1 28 /

(2) Paper Supplied from the Option Tray

1. Paper proceeds when the paper supply motor turns (CCW) and the paper supply clutch is connected, until the IN sensor of the top tray to supply the paper, turns ON.

2. When the IN sensor is turned ON, a certain volume of paper is further transported against the regist roller. (this corrects paper skew)

3. The paper is conveyed to the AR-C360P when the electromagnetic clutch which delivers power that the register strike motor is turning (CW) and the thrust reliance of a paper is completed to the 1st register strike roller is connected.

electromagnetism

Regist motor

The clutch of

electromagnetism

The clutch of

1st Regist roller

IN1 sensor

Regist roller

Upper tray

Option paper tray

IN sensor

Pickup roller

Feed motor

Feed roller

Retard roller

Feed sensor

Regist motor

Figure 2-7

Rev. 1 29 /

(3) Paper Supplied from MPT

1. In the usual case, sheet receiving is depressed by the arm for rise and fall at a home position.

2. When a regist motor rotates in the direction of (b), the arm for rise and fall drives and sheet receiving is rotated. The paper on sheet receiving goes up to the position where a lift rise sensor is turned on, and feeding is attained because the arm for rise and fall goes up.

3. The hopping motor is shared with the tray and MPT feeding uses the inversion of tray feeding.

If a hopping motor reverse-rotates, a pickup roller and a feed roller will drive and a paper will be sent out.

4. After an entrance sensor (2) is turned on by the paper tip, a paper is sent by specification length. A paper will stop, if the tip reaches the 2nd register strike roller Assy.

5. A regist motor rotates in the direction of (a) simultaneously, and a paper is conveyed with the 2nd regist roller Assy. A hopping motor is rotated until a paper arrives at the position of the image drum cartridge (black).

6. A hopping motor is rebooted, in order to make paper feed to the following paper, when an after the end escapes from the hopping sensor.

7. When operation of 4 to 6 is repeated and a lift rise sensor turns off, a regist motor is rotated in the direction of (b), and the arm for rise and fall is driven, and it goes up until a lift rise sensor turns on the paper on sheet receipt.

8. After the completion of paper sending operation, when a lift rise sensor detects off, a regist motor is rotated in the direction of (b), and sheet receiving is returned to a home position by dropping the arm for rise and fall.

Rev. 1 30 /

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