SHARP AR5012 Service Manual

AR-5012

SERVICE MANUAL

CODE : 00ZAR5012/A1E

DIGITAL LASER COPIER/ PRINTER

MODEL

CONTENTS

[ 1 ] GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

[ 2 ] SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1

[ 3 ] CONSUMABLE PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1

[ 4 ] EXTERNAL VIEWS AND INTERNAL STRUCTURES . . . . . . . . . 4 - 1

[ 5 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

[ 6 ] COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1

[ 7 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1

[ 8 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1

[ 9 ] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1

AR-5012

[10] SIMULATION, TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . 10 - 1

[11] MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1

[12] USER PROGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 1

[13] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - 1

[14] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 - 1

Parts marked with “ ” are important for maintaining the safety of the machine. Be sure to replace these parts with the replacement parts specified to maintain the safety and performance of the machine.

This document has been published to be used

SHARP CORPORATION

for after sales service only. The contents are subject to change without notice.

CAUTION

This product is a class 1 laser product that complies with 21CFR 1040 of the CDRH standard and IEC825. This means that this machine does not produce hazardous laser radiation. The use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

This laser radiation is not a danger to the skin, but when an exact focusing of the laser beam is achieved on the eye’s retina, there is the danger of spot damage to the retina.

The following cautions must be observed to avoid exposure of the laser beam to your eyes at the time of servicing.

1) When a problem in the laser optical unit has occurred, the whole optical unit must be exchanged as a unit, not as individual parts.

2) Do not look into the machine with the main switch turned on after removing the developer unit, toner cartridge, and drum cartridge.

3) Do not look into the laser beam exposure slit of the laser optical unit with the connector connected when removing and installing the optical system.

4) The middle frame contains the safety interlock switch.

Do not defeat the safety interlock by inserting wedges or other items into the switch slot.

LASER WAVE – LENGTH : 770 ~ 795nm Pulse times : 11.82µs/7mm Out put power : 0.17mW

± 0.01mW

CAUTION

INVISIBLE LASER RADIATION,

WHEN OPEN AND INTERLOCKS DEFEATED.

AVOID EXPOSURE TO BEAM.

VORSICHT

UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.

VARO !

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE ÄLÄ KATSO SÄTEESEEN.

ADVARSEL

USYNLIG LASERSTRÅLNING VED ÅBNING, NÅR SIKKERHEDSBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR STRÅLNING.

VARNING !

OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN. – STRÅLEN ÄR FARLIG.

At the production line, the output power

of the scanner unit is adjusted to 0.57 MILLI-WATT PLUS 20 PCTS and is maintained constant by the operation of the Automatic Power Control (APC). Even if the APC circuit fails in operation for some reason, the maximum output power will only be 15 MILLI-WATT 0.1 MICRO-SEC. Giving and accessible emission level of 42 MICRO-WATT which is still-less than the limit of CLASS-1 laser product.

Caution

This product contains a low power laser device. To ensure continued safety do not remove any cover or attempt to gain access to the inside of the product. Refer all servicing to qualified personnel.

Caution label on the unit

The label ( ) in the fusing area of the unit indicates the following: : Caution, risk of danger : Caution, hot surface

The foregoing is applicable only to the 220V model

230V model and 240V model.

VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.

VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA BRUKSANVISNING SPECIFICERATS, KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.

LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT

CONTENTS

[1] GENERAL

1. Major functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

[2] SPECIFICATIONS

1. Basic Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2. Operation specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3. Copy performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

[3] CONSUMABLE PARTS

1. Supply system table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

2. Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3. Production control number (lot No.) identification . . . . . . . 3-1

4. TD cartridge replacement . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES

1. Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

2. Internal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

3. Operation panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4. Motors and solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

5. Sensors and switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

6. PWB unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

7. Cross sectional view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

[5] UNPACKING AND INSTALLATION

1. Copier installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

2. Cautions on handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

3. Checking packed components and accessories . . . . . . . . 5-1

4. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5. Removing protective packing materials . . . . . . . . . . . . . . . 5-2

6. Developer unit installation . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

7. Toner cartridge installation . . . . . . . . . . . . . . . . . . . . . . . . 5-3

8. Loading copy paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

9. Power to copier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

10. Moving. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

[6] COPY PROCESS

1. Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

2. Outline of print process . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

3. Actual print process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

[7] OPERATIONAL DESCRIPTIONS

1. Outline of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

2. Scanner section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

3. Laser unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

4. Fuser section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

5. Paper feed section and paper transport section . . . . . . . . 7-4

[8] DISASSEMBLY AND ASSEMBLY

1. High voltage section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1

2. Operation panel section . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4

3. Optical section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5

4. Fusing section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7

5. Tray paper feed/transport section . . . . . . . . . . . . . . . . . . . .8-9

6. Manual paper feed section . . . . . . . . . . . . . . . . . . . . . . . .8-14

7. Rear frame section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-16

8. Power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-17

[9] ADJUSTMENTS

1. Optical section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1

2. Copy density adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . .9-4

3. High voltage adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .9-5

4. Duplex adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-6

[10] SIMULATION, TROUBLE CODES

1. Entering the simulation mode . . . . . . . . . . . . . . . . . . . . . .10-1

2. List of simulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2

3. Contents of simulations. . . . . . . . . . . . . . . . . . . . . . . . . . .10-3

4. Trouble codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-15

[11] MAINTENANCE

1. Maintenance table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1

2. Maintenance display system . . . . . . . . . . . . . . . . . . . . . . .11-1

3. Remaining toner indication . . . . . . . . . . . . . . . . . . . . . . . .11-1

4. Additional simulation and trouble code . . . . . . . . . . . . . . .11-2

[12] USER PROGRAMS

1. Functions that can be set with user programs. . . . . . . . . .12-1

2. Change the setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1

3. Density level adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .12-2

4. Toner save mode setup and cancel . . . . . . . . . . . . . . . . .12-2

[13] ELECTRICAL SECTION

1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1

2. Circuit descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-3

[14] CIRCUIT DIAGRAM

1. MCU PWB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-1

2. OPERATION PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-10

3. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-11

4. NOISE FILTER CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . .14-13

5. ACTUAL WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . .14-15

[1] GENERAL

1. Major functions

Configurations

Item

CPM SB/MB 2 Tray SPF R-SPF

Model AR-5012 12CPM SB 8M

Descriptions of items

CPM: Copy speed (Copies Per Minute)

SB/MB: SB = Manual feed single bypass, MB = Manual feed multi bypass

2 tray: Second cassette unit.

SPF: Original feed unit

R-SPF: Duplex original feed unit

Color scanner: Color scanner function

GDI printer: GDI printer function with USB.

PCL printer: PCL printer function with USB.

SOPM: Scan Once Print Many function (Many copies are made by one scan.)

Duplex: Auto duplex copy function

Memory: Standard page memory

FAX: FAX function.

Descriptions of table

: Standard provision : No function or no option available

Opt: Option

∗1: AL-12PKM ∗2: AR-PG2

Color

Scanner

GDI

printer

PCL

printer

SOPM Duplex Memory FAX

AR-5012

AR-5012 GENERAL 1 - 1

[2] SPECIFICATIONS

1. Basic Specifications

Item Type Desktop Copy system Dry, electrostatic Segment (class) Digital personal copier Copier dimensions AR-5012 20.4"(W)X18.2"(D)X11.6"(H) (518mm(W)X462.5mm(D)X295.6mm(H)) Weight

(Approximately)

2. Operation specifications

Paper feed section

Paper exit section Exit way Face down

Originals Original set Center Registration (left edge)

Optical section Scanning

Paper feed system

AB system Tray paper feed

Inch system Tray paper feed

section

Writing section

AR-5012 35.3lbs.(17Kg) TD and drum cartridges included

Section, item Details

AR-5012 1 tray (250 sheet) + single bypass

section

Multi bypass paper feed section

Single bypass paper feed section

section

Multi bypass paper feed section

Single bypass paper feed section

Capacity of output tray 100 sheets

Max. original size A4 (8-1/2" x 14") Original kinds sheet, book Original size detection None Scanning system 3 CCDs (RGB) sensor scanning by lighting white lamp CCD sensor Resolution 600 dpi Lighting lamp Type CCFL

Output data R, G, B 1 or 8 bits/pixel / A/D 16bit Writing system Writing to OPC drum by the semiconductor laser Laser unit Resolution 600 dpi

Paper size A4, B5, A5 (Landscape) Paper weight 56 - 80g/m Paper feed capacity 250 sheets Kinds Standard paper, specified paper, recycled paper Remark User adjustment of paper guide available Paper size A4, B5, A5, B6, A6 (Landscape) Paper weight 52 - 128g/m Paper feed capacity 50 sheets Kinds Standard paper, specified paper, recycled paper, OHP,

Label, Envelop (Single copy) Remark User adjustment of paper guide available Paper size A4, B5, A5, B6, A6 (Landscape) Paper weight 52 - 128g/m Paper feed capacity 1 sheet Kinds Standard paper, specified paper, recycled paper, OHP,

Label, Postal card, Envelop, Post card (Including

double postal without fold line) Remark User adjustment of paper guide available Paper size 8-1/2" x 14", 8-1/2 x 11", 8-1/2" x 5-1/2" (Landscape) Paper weight 15 - 21 lbs. Paper feed capacity 250 sheets Kinds Standard paper, specified paper, recycled paper Remark User adjustment of paper guide available Paper size 8-1/2" x 14", 8-1/2 x 11", 8-1/2" x 5-1/2", 3-1/2" x 5-1/2"

(Landscape) Paper weight 14 - 34.5 lbs. Paper feed capacity 50 sheets Kinds Standard paper, specified paper, recycled paper, OHP,

Label, Envelop (Single copy) Remark User adjustment of paper guide available Paper size 8-1/2" x 14", 8-1/2 x 11", 8-1/2" x 5-1/2" (Landscape) Paper weight 14 - 34.5 lbs. Paper feed capacity 1 sheet Kinds Standard paper, specified paper, recycled paper, OHP,

Label, Envelop Remark User adjustment of paper guide available

Voltage 1100Vrms (Min) Power consumption 9.6W (Max)

(15 - 21 lbs.)

(14 - 34.5 lbs.)

AR-5012 SPECIFICATIONS 2 - 1

Section, item Details

Image forming Photoconductor type OPC (30ø)

Life 25k

Charger Charging system Saw -tooth charging with a grid, / (-) scorotron

discharge Transfer system (+) DC scorotron system Separation system (-) DC scorotron system

Developing Developing system Dry, 2-component magnetic brush development system Cleaning Cleaning system Counter blade system (Counter to rotation)

Fusing section Fusing system Heat roller system

Upper heat roller type Teflon roller Lower heat roller type Silicon rubber roller Heater lamp type Halogen lamp

Voltage 120V/230V Power consumption 800W

Electrical section Power source Voltage 100V, 110V, 120/127V, 230V, 240V

Frequency Common use for 50 and 60Hz

Power consumption Max. Less than 1000W

Average

AR-5012 300 Wh/H *1)

(during copying) Average (stand-by) 80Wh/H *1) Pre-heat mode 18Wh/H *1) Auto power shut-off mode 4.5Wh/H *1)

*1) May fluctuate due to environmental conditions and the input voltage.

AR-5012 SPECIFICATIONS 2 - 2

3. Copy performance

Section, item Details AR-5012

Copy magnification Fixed

Manual steps (manual, photo) Copy speed First copy time Tray paper feed 9.6 sec. (Pre-heat mode:25 sec. / Auto power-shut-off mode : 40 sec.)

AB system A4 (Landscape)

AB system B5 (Landscape)

Inch system 8-1/2" x 14" (Landscape)

Inch system 8-1/2" x 11" (Landscape)

Max. continuous copy quantity 99 Void Void area leading edge 1 - 4mm

Warm-up time 0 sec. Power save mode reset time 0 sec. Paper jam recovery time 0 sec.

magnification ratios

Zooming magnification ratios

Copy speed (CPM)

Image loss leading edge same size: 3.0mm or less (OC) / 4mm or less (SPF/R-SPF/Duplex)

Same size 12 Enlargement 12 Reduction 12 Same size 12 Enlargement 12 Reduction 12 Same size 12 Enlargement 12 Reduction 12 Same size 12 Enlargement 12 Reduction 12

Trailing edge 4mm or less, 6mm or less (Duplex copying/both image) Side edge void area 0.5mm or more (per side)

3 Reduction + 2 Enlargement (AB system : 25, 70, 86, 100, 141, 400%) (Inch system : 25, 64, 78, 100, 129, 400%)

25 - 400% (376 steps in 1% increments)

5 steps

A4 or Letter/100%/Auto Exposure

4.5mm or less (total of both sides)

Enlarge: 2mm or less (OC) / 3mm or less (SPF/R-SPF/Duplex) Reduction (50%): 6.0mm or less (OC) / 8mm or less (SPF/R-SPF/ Duplex)

AR-5012 SPECIFICATIONS 2 - 3

[3] CONSUMABLE PARTS

1. Supply system table

No. Name Content Life Product name Package Remark

1 Toner CA(Black) Toner

(Toner: Net Weight 210g) Polyethylene bag × 10

2 Developer Developer

(Developer: Net Weight 170g)

3 Drum kit Drum × 1 25K AR-152DM 10

Drum fixing plate × 1

Note: Printing of the master/individual cartons is made in 4 languages, English/French/German/Spanish.

Packed together with the machine: DR 25K/Developer UN/Process UN

× 10 80K AR-152LT 1 LT=T ∗10

× 10 250K AR-152LD 1 LD=DV ∗10

2. Environmental

The environmental conditions for assuring the copy quality and the machine operations are as follows:

(1) Normal operating condition

Temperature: 20°C to 25 Humidity: 65 ± 5%RH

(2) Acceptable operating condition

Humidity (RH)

85%

60%

20%

10˚C 30˚C 35˚C

(3) Optical condition

Humidity (RH)

90%

60%

15%

–25˚C30˚C40˚C

(4) Supply storage condition

Humidity (RH)

90%

20%

3. Production control number (lot No.) identification

Production month Production day Destination code (Dealer, distributor, OEM, etc.) Production place (SOCC: Fixed to B.) End digit of year Version No.

∗: Destination

Division No.

EX Destination

Option Destination

The label on the drum cartridge shows the date of production. (SOCC production)

X000119Ver.A 1

A same pack G B same pack H

AP BQ

Production month Production day Destination code (Dealer, distributor, OEM, etc.) Production place (SOCC: Fixed to B.) End digit of year Version No.

Production month (1 - 9 = Jan. - Sep. 0 = Oct. X = Nov. Y = Dec.) Serial number of month Fixed to 1. Pack division (See table below) End digit of year Version No.

–5˚C45˚C

AR-5012 CONSUMABLE PARTS 3 - 1

Division No. Ex production 1 Option 2 Same pack 3

Production control label attachment position

4. TD cartridge replacement

1) Open the front and side cabinets of the copier.

2) Keep holding Toner lover, and

3) Carefully pull out Toner unit from the copier.

4) Put Toner unit in a collection bag immediately after removing it from the copier

Production control label attachment position(*1)

∗1 The production control label is not attached to the cartridge of a

China product.

Sub lot Production day Production month End digit of year Production place

Note: Never carry exposed Toner unit. Be sure to put it in the

collection bag.

AR-5012 CONSUMABLE PARTS 3 - 2

[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES

1. Appearance

1 Original cover 2 Original table 3 Operation panel 4 Front cover 5 Paper tray 6 Side cover 7 Side cover open button 8 Bypass paper guides 9 Single bypass

Paper output tray 11 Paper output tray extension 12 Power switch

10 13 Handle 14 Power cord socket ——

10 11

2. Internal

1 Toner cartridge 2 4 Charger cleaner 5 Photoconductive drum ——

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 1

Fusing unit release lever

3 Transfer charger

3. Operation panel

123 4 5 6

(AR-5012)

1 Exposure mode selector key and indicators

Use to sequentially select the exposure modes: AUTO, MANUAL or PHOTO. Selected mode is shown by a lit indicator.

3 Alarm indicators

Developer replacement required indicator Misfeed indicator Toner cartridge replacement required indicator *1 Maintenance indicator

5 Copy ratio display (%) key 6 Display

7 Power save indicator

Lights up when the copier is in a power save mode.

9 Zoom keys / indicator

Use to select any reduction or enlargement copy ratio from 25% to 400% in 1% increments.

11 Clear key

• Press to clear the display, or press during a copy run to terminate copying.

• Press and hold down during standby to display the total number of copies made to date.

2 Light and dark keys and exposure indicators

Use to adjust the MANUAL or PHOTO exposure level. Selected exposure level is shown by a lit indicator. Use to start and terminate user program setting.

4 Copy ratio selector key and copy ratio indicators

Use to sequentially select preset reduction/enlargement copy ratios. Selected copy ratio is shown by a lit indicator.

Displays the specified copy quantity, zoom copy ratio, user program code, and error code.

8 Paper feed location indicators

Light up to show the selected paper feed station.

10 Copy quantity keys

• Use to select the desired copy quantity (1 to 99).

• Use to make user program entries.

12 Print key and ready indicator

• Copying is possible when the indicator is on.

• Use to set a user program.

• Press to start copying

12111098

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 2

4. Motors and solenoids

No. Part name Control signal Function / Operation

1 Main motor MM Drives the copier. 2 Scanner motor MRMT Drives the optical mirror base (scanner unit). 3 Toner motor TM Supplies toner. 4 Cooling fan motor VFM Cools the optical section. 5 Resist roller solenoid RRS Resist roller rotation control solenoid 6 Paper feed solenoid CPFS1 Cassette Paper feed solenoid 1

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 3

5. Sensors and switches

No. Name Signal Type Function Output

1 Scanner unit home position

sensor 2 POD sensor POD Transmission sensor Paper exit detection "H" at paper pass 3 PPD2 sensor PPD2 Transmission sensor Paper transport detection 2 "L" at paper pass 4 Cassette detection switch CED1 Micro-switch Cassette installation detection "L" at cassette insertion 5 Manual feed detection

switch 6 PPD1 sensor PPD1 Transmission sensor Paper transport detection 1 "L" at paper pass 7 Door switch DSW Micro-switch Door open/close detection

MHPS Transmission sensor Scanner unit home position detection "H" at home position

MFD Transmission sensor Manual feed paper detection

(single only)

(safety switch for 24V)

"L" at paper detection

1 or 0V of 24V at door open

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 4

6. PWB unit

No. Name Function

1 Exposure lamp invertor PWB Exposure lamp (CCFL) control 2 Main PWB (MCU) Copier control 3 Operation PWB Operation input/display 4 Power PWB AC power input, DC voltage control, High voltage control 5 CCD sensor PWB For image scanning 6 LSU motor PWB For polygon motor drive 7 TCS PWB For toner sensor control 8 LSU PWB For laser control

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 5

7. Cross sectional view

No. Part name Function and operation

1 Scanner unit Illuminates the original with the copy lamp and passes the reflected light to the lens unit(CCD).

2 Exposure lamp Exposure lamp (CCFL) Illuminates original

3 LSU (Laser unit) Converts the original image signal into laser beams and writes onto the drum.

4 Paper exit roller Roller for paper exit

5 Main charger Provides negative charges evenly to the drum surface.

6 Heat roller Fuses toner on the paper. (Teflon roller)

7 Pressure roller Fuses toner on the paper. (Silicon rubber roller)

8 Drum Forms images.

9 Transfer unit Transfers images onto the drum.

10 Manual paper feed roller Transport the paper from the manual paper feed port.

11 PS roller unit Takes synchronization between the lead edge and the rear edge of the paper.

12 Paper feed roller Picks up a sheet of paper from the cassette.

AR-5012 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 6

[5] UNPACKING AND INSTALLATION

1. Copier installation

Improper installation may damage the copier. Please note the following during initial installation and whenever the copier is moved.

Caution: If the copier is moved from a cool place to a warm place, con-

densation may form inside the copier. Operation in this condition will cause poor copy quality and malfunctions. Leave the copier at room temperature for at least 2 hours before use.

Do not install your copier in areas that are:

• damp, humid, or very dusty

• exposed to direct sunlight

2. Cautions on handling

Be careful in handling the copier as follows to maintain the performance of this copier.

Do not drop the copier, subject it to shock or strike it against any object.

Do not expose the drum cartridge to direct sunlight.

Doing so will damage the surface (green portion) of the drum cartridge, causing poor print quality.

• poorly ventilated

• subject to extreme temperature or humidity changes, e.g., near an

air conditioner or heater.

The copier should be installed near an accessible power outlet for easy connection.

Be sure to connect the power cord only to a power outlet that meets the specified voltage and current requirements.

Also make certain the outlet is properly grounded.

Be sure to allow the required space around the machine for servicing and proper ventilation.

20cm (8")

Store spare supplies such as drum cartridges and TD cartridges in a dark place without removing from the package before use.

If they are exposed to direct sunlight, poor print quality may result.

Do not touch the surface (green portion) of the drum cartridge.

Doing so will damage the surface of the cartridge, causing poor print quality.

3. Checking packed components and accessories

Open the carton and check if the following components and accessories are included.

Power cord

Operation manual

Drum cartridge

(installed in unit)

10cm

(4")

10cm

(4")

20cm (

AR-5012 UNPACKING AND INSTALLATION 5 - 1

4. Unpacking

6. Developer unit installation

Be sure to hold the handles on both sides of the copier to unpack the copier and carry it to the installation location.

5. Removing protective packing materials

1) Remove pieces of tape and protective cover. Then open the original cover and remove protective materials (a) and (b).

AR-5012AR-5012

1) 2) 3) Open the side and front cabinets of the copier.

4) Remove the locking tape of the developer unit.

5) Remove the screw which is fixing the copier and Developer unit.

6) Remove Developer unit slowly from the copier.

7) Remove the screw (1 pc).

8) Remove Upper developer unit.

2) Release the scan head locking switch.

Grasp here and turn in the direction of the arrow.

Lock Unlock

3) Ensure that the bypass tray is open and then open the side cover by pressing the open button on the side cover.

9) Shake the aluminum bag to stir developer

10) Supply developer from the aluminum bag to the top of the MX roller evenly.

Note: Be careful not to splash developer outside Developer unit.

AR-5012 UNPACKING AND INSTALLATION 5 - 2

11) Attach Upper developer unit and fix it with a screw.

12) Rotate the MG roller gear to distribute developer evenly.

Note: Never rotate the gear in the reverse direction.

Note: When carrying Developer unit, do not tilt it extremely as

shown with the arrow in the figure below. (Prevention of splash of developer)

7. Toner cartridge installation

1) To prevent against uneven distribution of toner, hold Toner unit with both hands and shake it several times horizontally.

2) Hold the section of Toner unit shown in the figure below, remove the packing tape, and remove the cushion.

3) Pull out the cushion in the arrow direction.

13) Insert Developer unit carefully into the copier.

Note: Quick insertion may result in splash of developer. Be sure to

insert carefully.

14) Confirm that Developer unit is completely inserted to the bottom of the machine, fix Developer unit and the machine with a screw.

15) Completion of Developer unit installation

4) Insert Toner unit carefully into the copier.

5) Insert until the hook is engaged with the copier as shown in the figure below.

6) Pull out the shutter in the arrow direction.

Note: Do not hold and carry the shutter. Otherwise the shutter may

drop and Toner unit may drop.

7) Completion of Toner unit installation Close the front and side cabinets.

AR-5012 UNPACKING AND INSTALLATION 5 - 3

8. Loading copy paper

9. Power to copier

Note: This copier is equipped with two paper trays. Load copy paper

into the two paper trays.

1) Raise the handle of the paper tray and pull the paper tray out until it stops.

2) Remove the pressure plate lock. Rotate the pressure plate lock in the direction of the arrow to remove it while pressing down the pressure plate of the paper tray.

3) Store the pressure plate lock that was removed in step 2 and the screw that was removed when unpacking the machine in the front of the paper tray. To store the pressure plate lock, rotate the lock to fix it on the relevant location.

4) Adjust the paper guides on the paper tray to the copy paper width and length. Squeeze the lever of paper guide (A) and slide the guide to match with the width of the paper. Move paper guide (B) to the appropriate slot as marked on the tray.

Paper guide (B)

5) Fan the copy paper and insert it into the tray. Make sure the edges go under the corner hooks.

Note: Do not load paper above the maximum height line ( ).

Exceeding the line will cause a paper misfeed.

Paper guide (A)

1) Ensure that the power switch of the copier is in the OFF position. Insert the attached power cord into the power cord socket at the rear of the copier.

2) Plug the other end of the power cord into the nearest outlet.

10. Moving

Moving instructions

When moving the unit, follow the procedure below.

Note: When moving this unit, be sure to remove the TD cartridge in

advance.

1) Turn the power switch off and remove the power cord from the out-

let.

2) Open the side cover and front cover, in that order. Remove the TD

cartridge and close the front cover and side cover, in that order.

To open and close the side cover and front cover, and to remove the TD cartridge, see "TD CARTRIDGE REPLACEMENT".

3) Raise the handle of the paper tray and pull the paper tray out until it

stops.

4) Push the center of the pressure plate down until it locks in place

and lock the plate using the pressure plate lock which has been stored in the front of the paper tray.

5) Push the paper tray back into the unit.

6) Lock the scan head locking switch.

Note: When shipping the unit, the scan head locking switch must be

locked to prevent shipping damage.

7) Close the multi-bypass tray and the paper output tray extension,

and attach the packing materials and tape which were removed during installation of the unit. See "PREPARING THE UNIT FOR INSTALLATION".

8) Pack the unit into the carton. See "CHECKING PACKED COMPO-

NENTS AND ACCESSORIES".

6) Gently push the paper tray back into the copier.

Note: After loading copy paper, to cancel the blinking "H" without

restarting copying, press the clear ( ) key. The "P" in the display will go out and the ready ( ) indicator will light up.

AR-5012 UNPACKING AND INSTALLATION 5 - 4

[6] COPY PROCESS

1. Functional diagram

An OPC drum is used for the photoconductor. (Structure of the OPC drum layers)

Main charger

OPC layer (20 microns thick) Pigment layer (0.2 to 0.3 microns thick) Aluminum drum

(Basic operation cycle)

Laser beam

MG roller

Main high voltage unit

Cleaning blade

Drum

Transfer unit

Resist roller

Semiconductor laser

Focus correction lens

Exposure

To face down tray

Saw tooth

Cleaning blade

Waste toner box

Paper release Fusing

Heat roller

Heater lamp

Charge

Drum

Cleaning

Separation

Electrode

AR-5012 COPY PROCESS 6 - 1

Transfer

Transfer charger

Transfer high voltage unit

Developing

Cassette

paper feed

Synchronization

with drum

Toner

Developer

PS roller

Manual feed

Print process

Paper transport route

2. Outline of print process

This printer is a non-impact printer that uses a semiconductor laser and electrostatic print process. This printer uses an OPC (Organic Photo Conductor) for its photoconductive material. First, voltage from the main corona unit charges the drum surface and a latent image is formed on the drum surface using a laser beam. This latent image forms a visible image on the drum surface when toner is applied. The toner image is then transferred onto the print paper by the transfer corona and fused on the print paper in the fusing section with a combination of heat and pressure.

Step-1: Charge Step-2: Exposure * Latent image is formed on the drum. Step-3: Developing

Latent image formed on the drum is then changed into visible image with toner.

Step-4: Transfer

The visible image (toner image) on the drum is transferred onto the print paper.

Step-5: Cleaning

Residual toner on the drum surface is removed and collected by the cleaning blade.

Step-6: Optical discharge

Residual charge on the drum surface is removed, by semiconductor laser beam.

3. Actual print process

Step-1: DC charge

A uniform negative charge is applied over the OPC drum surface by the main charging unit. Stable potential is maintained by means of the Scorotron charger. Positive charges are generated in the aluminum layer.

Step-2: Exposure (laser beam, lens)

A Laser beam is generated from the semiconductor laser and controlled by the print pattern signal. The laser writes onto the OPC drum surface through the polygon mirrors and lens. The resistance of the OPC layer decreases for an area exposed by the laser beam (corresponding to the print pattern signal). The beam neutralizes the negative charge. An electrostatic latent image is formed on the drum surface.

Semiconductor laser

Exposure (semiconductor laser)

OPC layer

Pigment layer

Aluminum drum

Drum surface charge after the exposure

OPC layer

Pigment layer

Aluminum

Non-image area Image area

layer

About

DC5.5KV

( 580V/ 390V)

AR-5012 COPY PROCESS 6 - 2

Step-3: Developing (DC bias)

A bias potential is applied to the MG roller in the two component magnetic brush developing method, and the toner is charged negative through friction with the carrier. Non-image area of the drum surface charged with negative potential repel the toner, whereas the laser exposed portions where no negative charges exist, attract the toner. As a result, a visible image appears on the drum surface.

:Carrier (Magnetized particle) :Toner (Charge negative by friction) (N) (S) Permanent magnet

(provided in three locations)

Step-4: Transfer

The visible image on the drum surface is transferred onto the print paper by applying a positive charge from the transfer corona to the backside of the print paper.

About DC 5.2kV

400V 8V

Toner is attracted over the shadowed area because of the developing bias.

MG roller

Step-5: Separation

Since the print paper is charged positively by the transfer corona, it is discharged by the separation corona. The separation corona is connected to ground.

Step-6: Cleaning

Toner remaining on the drum is removed and collected by the cleaning blade. It is transported to the waste toner collecting section in the cleaning unit by the waste toner transport roller.

AR-5012 COPY PROCESS 6 - 3

Step-7: Optical discharge (Semiconductor laser)

Before the drum rotation is stopped, the semiconductor laser is radiated onto the drum to reduce the electrical resistance in the OPC layer and eliminate residual charge, providing a uniform state to the drum surface for the next page to be printed. When the electrical resistance is reduced, positive charges on the aluminum layer are moved and neutralized with negative charges on the OPC layer.

Semiconductor laser

Charge by the Scorotron charger

Function

The Scorotron charger functions to maintain uniform surface potential on the drum at all times, It control the surface potential regardless of the charge characteristics of the photoconductor.

Basic function

A screen grid is placed between the saw tooth and the photoconductor. A stable voltage is added to the screen grid to maintain the corona current on the photoconductor. As the photoconductor is charged by the saw tooth from the main corona unit, the surface potential increases. This increases the current flowing through the screen grid. When the photoconductor potential nears the grid potential, the current turns to flow to the grid so that the photoconductor potential can be maintained at a stable level.

Start

1) Because the grid potential is at a low level, the drum potential is at about -400V. (Carrier may not be attracted though the carrier is pulled towards the drum by the electrostatic force of -400V.

2) Developing bias (-400V) is applied when the photoconductor potential is switched from LOW to HIGH.

3) Once developing bias (-400V) is applied and the photo conductor potential rises to HIGH, toner will not be attracted to the drum.

Stop

The reverse sequence takes place. Retaining developing bias at an abnormal occurrence

Function

The developing bias will be lost if the power supply was removed during print process. In this event, the drum potential slightly abates and the carrier makes deposits on the drum because of strong static power. To prevent this, the machine incorporates a function to retain the developing bias for a certain period and decrease the voltage gradually against possible power loss.

Basic function

Normally, the developing bias voltage is retained for a certain time before the drum comes to a complete stop if the machine should stop before completing the normal print cycle. The developing bias can be added before resuming the operation after an abnormal interruption. Therefore, carrier will not make a deposit on the drum surface.

Process controlling

Function

The print pattern signal is converted into an invisible image by the semiconductor laser using negative to positive (reversible) developing method. Therefore, if the developing bias is added before the drum is charged, toner is attracted onto the drum. If the developing bias is not added when the drum is charged, the carrier is attracted to the drum because of the strong electrostatic force of the drum. To avoid this, the process is controlled by adjusting the drum potential and the grid potential of the Scorotron charger.

Basic function

Voltage added to the screen grid can be selected, high and low. To make it easily understood, the figure below shows voltage transition at the developer unit.

START STOP

Toner attract potentia l

Low

Print potential

Develop ing bias

High

Time

Drum potential

AR-5012 COPY PROCESS 6 - 4

[7] OPERATIONAL DESCRIPTIONS

1. Outline of operation

The outline of operation is described referring to the basic configuration.

(Basic configuration)

Scanner section

Operation

section

Printer section

CCD

MCU (Main control/image process section)

LSU (Laser unit) Laser diode, Polygon mirror lens

Laser beam

Process section

Cassette paper

feed section

Paper exit

Fusing section

Paper transport section

Manual paper

feed section

(Outline of copy operation)

Setting conditions

1) Set copy conditions such as the copy quantity and the copy density with the operation section, and press the COPY button. The information on copy conditions is sent to the MCU.

Image scanning

2) When the COPY button is pressed, the scanner section starts scanning of images. The light from the copy lamp is reflected by the document and passed through the lens to the CCD.

Photo signal/Electric signal conversion

3) The image is converted into electrical signals by the CCD circuit and passed to the MCU.

Image process

4) The document image signal sent from the CCD circuit is processed under the revised conditions and sent to the LSU (laser unit) as print data.

Electric signal/Photo signal (laser beam) conversion

5) The LSU emits laser beams according to the print data. (Electrical signals are converted into photo signals.)

6) The laser beams are radiated through the polygon mirror and various lenses to the OPC drum.

Printing

7) Electrostatic latent images are formed on the OPC drum according to the laser beams, and the latent images are developed to be visible images(toner images).

8) Meanwhile the paper is fed to the image transfer section in synchronization with the image lead edge.

9) After the transfer of toner images onto the paper, the toner images are fused to the paper by the fusing section. The copied paper is discharged onto the exit tray.

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 1

2. Scanner section

A. Scanner unit

The scanner unit in the digital copier scans images.

It is composed of the optical unit and the drive unit. The optical unit performs scanning in the main scan direction with the light receiving elements (color CCD). The drive unit performs scanning in the sub scanning direction by moving the optical unit.

B. Optical system

Two white lamps are used as the light source.

Light radiated from the light source is applied to the document on the document table. The reflected light from the document is reflected 5 times by No. 1 - No. 3 mirrors and passed through the reduction lens to form images on the light-receiving surface of 3-line CCD.

The light-receiving surface of the color CCD is provided with 3 line scanning sections for RGB. Separate images scanned in each color section are overlapped to complete color scanning. (When PC scanning)

The resolution is 600dpi.

When copying, only the green component is used to print with the printer.

The color component for printing can be switched to red or blue by the service simulation.

(Spectrum characteristics of the color CCD)

6.00E-01

5.00E-01

4.00E-01

3.00E-01

Intensity of UV

2.00E-01

1.00E-01

0.00E+00

Lamp : MBVM26W25W260NLH/G Lamp current : 5mA Temp. : 25 degree

0 200 400 600 800

MBVM26W25W260NLH/G

Wave length (nm)

(Spectrum characteristics of the lamp)

C. Drive system

The drive system is composed of the scanner motor, the pulley gear, the idle pulley, the idle gear, the belt 473, the belt 190, and the shaft.

The motor rotation is converted into reciprocated movements of the belt 473 through the idle gear, the pulley gear, the belt 190, and the idle pulley to drive the optical unit.

(Optical unit)

1 Table glass 2 Optical unit 3 Lens 4 Mirror 1 5 Mirror 2 6 Mirror 3 7 CCD PWB 8 Lamp 9 Reflector

34 6 285

1 Scanner motor 2 Pulley gear 3 Idle pulley 4 Belt 473 5 Belt 190 6 Optical unit 7 Shaft 8 Idle gear 9

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 2

3. Laser unit

The image data sent from the MCU (image process circuit) is sent to the LSU (laser unit), where it is converted into laser beams.

A. Basic structure

The LSU unit is the writing section of the digital optical system.

The semiconductor laser is used as the light source, and images are formed on the OPC drum by the polygon mirror and fθ lens, etc.

The laser beams are passed through the collimator lens, the cylindrical lens, the polygon mirror, the fθ lens, and the mirror to form images on the OPC drum in the main scanning direction. The laser emitting PWB is provided with the APC (auto power control) in order to eliminate fluctuations in the laser power. The BD PWB works for measurement of the laser writing start point.

B. Laser beam path

No Component Function

1 Semiconductor laser Generates laser beams. 2 Collimator lens Converges laser beams in parallel. 3 Polygon mirror,

polygon motor

4 BD (Mirror, lens, PWB) Detects start timing of laser scanning. 5fθ lens Converges laser beams at a spot on the

Makes the laser scanning speeds at both ends of the drum same as each other.

Reflects laser beams at a constant rpm.

drum. Makes the laser scanning speeds at both

ends of the drum same as each other. (Refer to the figure below.)

C. Composition

Effective scanning width: 216mm (max.)

Resolution: 600dpi

Beam diameter: 75um in the main scanning direction, 80um in the sub scanning direction

Image surface power: 0.17 ±0.01mW (Laser wavelength 770 - 795nm)

Polygon motor section: Brushless motor 20.787rpm No. of mirror surfaces: 6 surfaces

4. Fuser section

a ≠ b ≠ c

ab c

d = e = f

def

A. General description

f θ LENS

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 3

General block diagram (cross section)

Thermistor

Heat roller

Thermal fuse

Separator pawl

PPD2

Pressure roller

Paper guide

Top view

Heat roller

Thermistor

Thermal fuse

Heater lamp

5. Paper feed section and paper transport section

A. Paper transport path and general operations

Separator pawl

(1) Heat roller

A Teflon roller is used for the heat roller and a silicone rubber roller is used for the lower heat roller for better toner fusing performance and paper separation.

(2) Separator pawl

Three separator pawls are used on the upper heat roller. The separator pawls are Teflon coated to reduce friction with the roller and prevent a smear on the paper caused by the separator pawl.

(3) Thermal control

1) The heater lamp, thermistor, main PWB, DC power supply PWB, and triac within the power supply unit are used to control the temperature in the fuser unit. To prevent against abnormally high temperature in the fuser unit, a thermal breaker and thermal fuse are used for safety purposes.

Heated by the heater lamp. (950W)

Safety device (thermal breaker, thermal fuse)

Triac (in the power supply unit)

The surface temperature of the upper heat roller is sensed by the thermistor.

Level of the thermistor is controlled by the main PWB.

54 3

8 9 10

11121314

1 Scanner unit 8 Drum 2 Copy lamp 9 Transfer unit 3 LSU (Laser unit) 10 Pickup roller 4 Paper exit roller 11 Manual paper feed tray 5 Main charger 12 Manual paper feed roller 6 Heat roller 13 PS roller unit 7 Pressure roller 14 Paper feed roller

Paper feed is made in two ways; the tray paper feed and the manual paper feed. The tray is of universal-type, and has the capacity of 250 sheets.

The front loading system allows you to install or remove the tray from the front cabinet.

The general descriptions on the tray paper feed and the manual paper feed operation are given below.

(1) Cassette paper feed operation

1) The figure below shows the positions of the pick-up roller, the paper feed clutch sleeve, and the paper feed latch in the initial state without pressing the COPY button after lighting the ready lamp. The paper feed latch is in contact with the projection of the clutch sleeve.

With the signal from the main PWB, the triac is controlled on and off. (power supply PWB)

2) The surface temperature of the upper heat roller is set to 165 190°C. The surface temperature during the power save mode is set to 100°C.

3) The self-check function comes active when one of the following malfunctions occurs, and an "H" is displayed on the multicopy window.

a. When the heat roller surface temperature rises above 240°C.

b. When the heat roller surface temperature drops below 100°C during

the copy cycle.

c. Open thermistor

d. Open thermal fuse

e. When the heat roller temperature does not reach 190°C within 27

second after supplying the power.

(4) Fusing resistor

Fusing resistor

This model is provided with a fusing resistor in the fusing section to improve transfer efficiency.

Since the upper heat roller is conductive, when using copy paper that contains moisture and the distance between the transfer unit and the fusing unit is short, the transfer current may find a path to ground via the copy paper, the upper heat roller and the discharging brush.

2) When the COPY button is pressed, the main drive motor starts rotating to drive each drive gear. The pick-up drive gear also is driven at that time. Since, however, the paper feed latch is in contact with the projection of the clutch sleeve, rotation of the drive gear is not transmitted to the pick-up roller, which does not rotate therefore.

PFS

RRS

OFF

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 4

3) After about 0.1 sec from when the main motor start rotating, the tray paper feed solenoid (PFS) turns on for a moment. This disengages the paper feed latch from the projection of the clutch sleeve, transmitting rotation of the pick-up drive gear to the paper feed roller shaft, rotating the pick-up roller to feed the paper.

transferred on the paper, which is separated from the OPC drum by the drum curve and the separation section.

PFS

RRS

OFF

4) After more than half rotation of the pick-up roller, the paper feed latch is brought in contact with a notch on the clutch sleeve, stopping rotation of the pick-up roller.

5) At this time, the paper is fed passed the paper entry detection switch (PPD1), and detected by it. After about 0.15 sec from detection of paper by PPD1, the tray paper feed solenoid (PFS) turns on so that the clutch sleeve projection comes into contact with the paper feed latch to stop the pick-up roller. Then the pickup roller rotates for about 0.15 sec so that the lead edge of the paper is evenly pressed on the resist roller, preventing against skew feeding.

PFS

RRS

OFF

8) The paper separated from the drum is passed through the fusing paper guide, the heat roller (fusing section), POD (paper out detector) to the copy tray.

(2) Manual multi paper feed operation

1) Before paper feed operation, the manual paper feed solenoid (MPFS) is turned OFF as shown in the figure below.

PFS

RRS

OFF

6) To release the resist roller, the tray paper feed solenoid and the resist solenoid are turned on by the paper start signal to disengage the resist start latch from the clutch sleeve, transmitting rotation of the resist drive gear to the resist roller shaft. Thus the paper is transported by the resist roller.

7) After the resist roller starts rotating, the paper is passed through the pre-transfer guide to the transfer section. Images are

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 5

MPFS

2) When the PRINT button is pressed, the manual paper feed solenoid (MPFS) turns on to disengage the manual paper feed latch. A from the manual paper feed clutch sleeve A, rotating the manual paper feed roller and the manual take-up roller. At the same time, the manual paper feed stopper opens and the manual take-up roller is pressed to the surface of the paper to start paper feeding.

4) The lead edge of the transported paper is pressed on the resist roller by the transport roller. Then the paper is stopped temporarily to allow synchronization with the lead edge of the image on the OPC drum. From this point, the operation is the same as the paper feed operation from the tray. (Refer to A-5 - 8.)

5) The solenoid turns off to close the gate and return to the initial state.

MPFS

3) When pawl C of the manual paper feed clutch sleeve is engaged with the manual feed latch, the manual feed stopper falls and the manual take-up roller rises. At that time, the manual paper feed roller is rotating.

MPFS

(3) Conditions of occurrence of paper misfeed

a. When the power is turned on:

PPD or POD is ON when the power is turned on.

b. Copy operation

a PPD1 jam PPD1 does not turn off within 4 sec after turning

b PPD2 jam PPD2 is off immediately after turning on the

c POD jam POD does not turn on within 2.9 sec after turning

on the resist roller.

resist roller. PPD2 does not turn off within 1.2 sec after

turning off the resist roller.

on the resist roller. POD does not turn off within 1.5 sec - 2.7 sec

after turning off PPD2.

MPFS

AR-5012 OPERATIONAL DESCRIPTIONS 7 - 6

+ 78 hidden pages