Sharp AL-1000, AL-1010 Service Manual. Parts Guide

SERVICE MANUAL

CODE:00ZAL1000/A1E

DIGITAL COPIER

AL-1000/1010

AL-1000

MODEL

CONTENTS

[ 1 ] GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 1

[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1

[ 3 ] CONSUMABLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 1

[ 4 ] EXTERNAL VIEWS AND INTERNAL STRUCTURE. . . . . . . . . . . . 4 – 1

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

[ 6 ] COPING PROCESS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1

[ 7 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1

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

[ 9 ] ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 1

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

[11] USER PROGRA MS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 1

[12] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 – 1

AL-1010

[13] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 – 1

Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintain in g th e sa fty and performance of the set.

SHARP CORPORATION

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

AL-1000/1010

CAUTION

This product is a class 1 laser product that complies with 21CFR 1040.10 and 1040.11 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 : 780 ~ 795 Pulse times : 0.481ms/6mm Out put power : 0.20 ± 0.03mW

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.

AL-1000/1010

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 cove r or attempt to gain acce ss to the inside of the product. Refer all servi ci n g to qu al ified perso nn el.

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.

The foregoing is applicable only to the 220V model

230V model and 240V model.

LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT

AL-1000/1010

CONTENTS

[1] GENERAL

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2. Target User Copy Volume. . . . . . . . . . . . . . . . . . . . . . . . 1-1

3. Main features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

(1) High-speed laser copying . . . . . . . . . . . . . . . . . . . . 1-1

(2) High-quality digital image. . . . . . . . . . . . . . . . . . . . . 1-1

(3) Substantial copying functions . . . . . . . . . . . . . . . . . 1-1

4. Environmental

(1) Normal operating condition . . . . . . . . . . . . . . . . . . . 1-1

(2) Acceptable condition . . . . . . . . . . . . . . . . . . . . . . . . 1-1

(3) Optional condition . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

(4) Supply storage condition . . . . . . . . . . . . . . . . . . . . . 1-1

[2] SPECIFICATIONS

1. Basic specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2. Operation specification . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

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

4. Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

[3] CONSUMABLE PARTS

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

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

[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES

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

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

3. Internal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

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

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

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

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

[5] UNPACKING AND INSTALLATION

1. A WORD ON COPIER INSTALLATION . . . . . . . . . . . . . 5-1

2. CHECKING PACKED COMPONENTS AND

ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

3. UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

4. REMOVING PROTECTIVE PACKING MATERIAlS . . . . 5-2

5. INSTALLING THE TD CARTRIDGE . . . . . . . . . . . . . . . . 5-2

6. LOADING COPY PAPER (installing the paper tray) . . . . 5-3

7. PLUGGING IN THE COPIER . . . . . . . . . . . . . . . . . . . . . 5-3

[6] PRINTING PROCESS

(1) Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

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

(3) Actual print process . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

[7] OPERATIONAL DESCRIPTIONS

(1) Outline of operation . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

(2) Scanner section. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

(2) Laser Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

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

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

Process unit new drum detection mechanism . . . . . . . . . . . . 7-8

[8] DISASSEMBLY AND ASSEMBLY

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

2. Operation panel section. . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

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

4. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

5. Tray paper feed/transport section . . . . . . . . . . . . . . . . . . 8-7

6. Manual paper feed section. . . . . . . . . . . . . . . . . . . . . . . 8-12

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

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

[9] ADJUSTMENTS

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

(1) Image distortion adjustment. . . . . . . . . . . . . . . . . . . 9-1

(2) Copy magnification ratio adjustment . . . . . . . . . . . . 9-4

(3) Lens unit attachment reference . . . . . . . . . . . . . . . . 9-6

(4) Image position adjustment. . . . . . . . . . . . . . . . . . . . 9-7

2. Copy density adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 9-8

(1) Copy density adjustment timing . . . . . . . . . . . . . . . . 9-8

(2) Note for copy density adjustment. . . . . . . . . . . . . . . 9-8

(3) Necessary tool for copy density adjustment. . . . . . . 9-8

(4) Features of copy density adjustment . . . . . . . . . . . . 9-9

(5) Copy density adjustment procedure. . . . . . . . . . . . . 9-9

3. High voltage adjustment . . . . . . . . . . . . . . . . . . . . . . . . 9-10

(1) Main charger (Grid bias)

(2) DV bias adjustment . . . . . . . . . . . . . . . . . . . . . . . . 9-10

[10] SIMULATION , TROUBLE CODES

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

2. List of simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

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

4. Trouble codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11

[11] USER PROGRAMS

Function which can be set with the user program. . . . . . . . . 11-1

Charge the setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

[12] ELECTRICAL SECTION

1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

2. Circuit descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

A. Main PWB(MCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

(1) CPU signal table . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

(2) ASIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-6

(3) Reset circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13

(4) Heater lamp control circuit . . . . . . . . . . . . . . . . . . 12-14

(5) Driver circuit (solenoid). . . . . . . . . . . . . . . . . . . . . 12-15

(6) Toner supply motor drive circuit. . . . . . . . . . . . . . 12-15

(7) Main motor drive circuit . . . . . . . . . . . . . . . . . . . . 12-15

(8) Mirror motor circuit . . . . . . . . . . . . . . . . . . . . . . . . 12-16

(9) Power circuit block diagram . . . . . . . . . . . . . . . . . 12-17

(10) CI invertor PWB (circuit). . . . . . . . . . . . . . . . . . . 12-20

(11) CCD PWB operational description. . . . . . . . . . . 12-20

Operation section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21

[13] CIRCUIT DIAGRAM

AC INTERLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2

OPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-8

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-9

ACTUAL WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . 13-10

AL-1000/1010

[1] GENERAL

1. General

This model is a digital personal copier produced with key words of “Comfort able copy, Clear copy, Easy copy” providing high copy performances and copy productivity.

2. Target User Copy Volume: Monthly Average

Copies: 300 ∼ 600 (Max. 800) Prints: 300 ∼ 600 (Max. 800)

3. Main features

(1) High-speed laser copying

● Since warm-up time is zero, copying can be started imme-

diately after the power switch is turned on.

● First-copy time is only 9.6 seconds (normal mode).

● Copying speed is 10 copies/min., which adapts to business

use, allowing improvement of working efficiency.

(2) High-quality digital image

● High-quality image copying at 600 dpi can be performed.

● In addition to the automatic exposure mode, the manual ex-

posure can be adjusted in five steps.

● The photo mode copying function allows clear copying of

delicate halftone original images such as monochrome photos and color photos.

4. Environmental

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

(1) Normal operating condition

Temperature:20˚C~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%

(3) Substantial copying functions

● Zoom copying from 50% to 200% in 1% increments can be

performed.

● Continuous copying of maximum 99 sheets can also be per-

formed.

● Toner save mode reduces toner consumption by ap-

proximately 10%.

● User programs allow setting/modification of functions for

customer’s needs.

60%

15%

–25˚C 30˚C 40˚C

(4) Supply storage condition

Humidity (RH)

90%

20%

1-1

–5˚C 45˚C

AL-1000/1010

[2] SPECIFICATIONS

1. Basic Specifications

item type Desktop Copy system Dry, electrostatic Segment (class) Digital personal copier External dimensions (W × D × H)

(mm) Weight Approx. 43.3lbs (19.6kg), TD and drum cartridges included

2. Operation specification

Section, item Details

Paper feed system

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 – 130g/m Paper feed capacity 50 sheets

Kinds Remark User adjustment of paper guide available

Paper size A4, B5, A5, B6, A6 (Landscape) Paper weight 52 – 130g/m Paper feed capacity 1 sheet

Kinds Remark User adjustment of paper guide available

Paper size 8-1/2″ × 14″, 8-1/2 × 11″, 8-1/2″ × 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 Paper weight 14 – 34.5 lbs.

Paper feed capacity 50 sheets Kinds Remark User adjustment of paper guide available

Paper size 8-1/2″ × 14″, 8-1/2 × 11″, 8-1/2″ × 5-1/2″ (Landscape) Paper weight 14 – 34.5 lbs. Paper feed capacity 1 sheet

Kinds Remark User adjustment of paper guide available

Paper feed section

AB system

Inch system

Tray paper feed section

Multi bypass paper feed section

Single bypass paper feed section

Tray paper feed section

Multi bypass paper feed section

Single bypass paper feed section

H293 × W518 × D445mm

1 tray (250 sheet) single bypass

1tray (250 sheet) + multi bypass (50 sheet)

Standard paper, specified paper, recycled paper,

OHP, Label, Postal card

Standard paper, specified paper, recycled paper,

OHP, Label, Postal card

8-1/2″ × 14″, 8-1/2 × 11″, 8-1/2″ × 5-1/2″, 3-1/2″ × 5-

1/2″ (Landscape)

Standard paper, specified paper, recycled paper,

OHP, Label, Postal card

Standard paper, specified paper, recycled paper,

OHP, Label, Postal card

2-1

Section, item Details

Exit way Face down

Paper exit section

Capacity of output tray

Original set Center Registration (left edge) Max. original

Originals

size Original kinds sheet, book Original size

detection Scanning system CCD sensor scanning by lighting lamp scanner CCD sensor Resolution 400 dpi

Type Xenon lamp

Lighting lamp

Voltage 1.5kV

Optical section

Scanning section

Power consumption 11 ± 3W

Writing section

Writing system Writing to OPC drum by the semiconductor laser Laser unit Resolution 600 dpi

Gradation 256 gradations/8bit

Photoconductor

type OPC (30φ) Life 18k

Charging system

Image forming

Charger

Transfer system (+) DC corotron system

Separation system (–) DC corotron system Developing Developing system Cleaning Cleaning system Counter blade system (Counter to rotation)

Fusing system Heat roller system Upper heat roller type Teflon roller

Fusing section

Lower heat roller type Silicon rubber roller

type Halogen lamp heater lamp

Voltage 100V

Power consumption 800W Power source

Voltage 100V, 110V, 120/127V, 230V, 240V

Frequency Common use for 50 and 60Hz

Max. 1000W

Electrical section

Power consumption

Average (during

copying)

Average (stand-by) 70Wh/H *

Pre-heat mode 40Wh/H *

Auto power shut-off

mode

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

AL-1000/1010

100 sheets

B4 (10″ × 14″)

None

Saw -tooth charging with a grid, / (–) scorotron

discharge

Dry, 2-component magnetic brush development

system

260Wh/H *

18Wh/H *

2-2

AL-1000/1010

3. Copy performance

Section, item Details

Fixed magnification

Copy magnification

Manual steps (manual, photo)

Copy speed First copy time Tray paper feed

AB system : A4 (Landscape)

B5 (Landscape) Copy speed (CPM)

Inch system 81/2″ × 14″ (Landscape)

8-1/2″ × 11″ (Landscape)

Max. continuous copy quantity

Void

Warm-up time 0 sec. Power save mode

reset time Paper jam recovery

time

ratios Zooming

magnification ratios

Copy speed (CPM)

Void area

Image loss

Manual paper feed

Same size 10

Enlargement 10

Reduction 10

Same size 10

Enlargement 10

Reduction 10

Same size 10

Enlargement 10

Reduction 10

Same size 10

Enlargement 10

Reduction 10

leading edge 1 ∼ 4mm

Trailing edge 4mm or less

Side edge void

area

leading edge

Trailing edge

Side edge void

area

3R + 2E (AB system : 50, 70, 81, 100, 141, 200%)

(Inch system : 50, 64, 78, 129, 100, 200%)

50 ∼ 200% (151 steps in 1% increments)

5 steps

9.6 sec. (Pre-heat mode:16 sec. or below / Auto power-shut-off mode : 23 sec. or below)

Single : 10.0 sec. / Multi : 8.0sec (Pre-heat

mode:16 sec. or below / Auto power-shut-off mode :

23 sec. or below)

3mm or less/per side

same size: 3.0mm or less / Enlarge (200%): 1.5mm

or less / Reduction (50%): 6.0mm or less

same size: 3.0mm or less / Enlarge (200%): 1.5mm

or less / Reduction (50%): 6.0mm or less

same size: 3.0mm or less / Enlarge (200%): 1.5mm

or less / Reduction (50%): 6.0mm or less

0 sec.

2-3

4. Others

Additional

function

Accessories

AL-1000/1010

Section, item Remark

Toner save mode

Pre-heat mode

Auto power shut off mode

Subsidiaries SEC SECL SEEG SUK SCA EX AB EX Inch Tray (Universal) Yes Yes Yes Yes Yes Yes Yes Drum cartridge Yes Yes Yes Yes Yes Yes Yes TD cartridge Yes Yes Yes Yes Yes No* No* AC power cord Yes Yes Yes Yes Yes Yes Yes Tool for corona

cleaning

Operation manual

*Except some

Yes Yes Yes Yes Yes Yes Yes

English1

Can be set or canceled with user

simulation.

Can be set or canceled with user

simulation.

Can be set or canceled with user

simulation.

English1

French

QB/QE:

Multi

language

English2 English2

Yes

Ex.)

English

French

Arabic

English

Spanish

Ex.)

2-4

AL-1000/1010

[3] CONSUMABLE PARTS

1. Supply system table

Common to all destinations

No. Name Content Life Product name Package

Toner/developer cartridge

1 Develop cartridge (Black) × 1

2 Drum cartirdge Drum cartridge 18K AL-100R 5

(Toner: Net weight 220g) (Developer: Net weight 190g)

× 1

(5% document)

AL-100TD 5

2. Production control number(lot No.) identification

〈Developing cartridge〉

Destination (∗)

Indicates production in China.

The end digit of production year

∗:Destination

Division No. Japan option 1 Ex option 2 Japan, same pack 6 Ex, same pack 7

Serial number

(00001-99999)

Production month

January

September October November December

~ 9

0 X Y

〈Drum cartridge〉

The label on the drum cartridge shows the date of production.

Ver. A

The end digit of production year

Ex production 1 Option 2 Same pack 3

Serial number (for each

month) (00001-99999)

Factory

Division No.

Production month

January

September October November December

0 X Y

Production control lavel attachment position

3-1

[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES

1. Appearance

(1)

(2)

AL-1000/1010

(4)

(6)

(5)

(1) Original table (2) Original cover (3) Side cover (4) Operation panel (5) Front cover (6) Paper tray

(7) Side cover open button (8) Paper guides (9) Handle (10) Paper output tray (11) Paper output tray extension (12) Power cord socket (13) Power switch

(7)

(8)

(12)

(3)

(9)

(13)

(10)

(11)

(9)

4-1

AL-1000/1010

2. Operational panel

Exposure mode selector key

(1)

and indicators Copy ratio selector key and

(4)

copy ratio indicators

(1)

(2)

(3)

Light and dark keys and

(2)

exposure indicators

200% 129%

100%

78% 64% 50%

(4)

MAX.

51/281/

100%

81/214

81/211 MIN.

81/211

51/281/

(5)

(6)

x x

ZOOM

(10)

(7)

(11)

(12)

(3) Alarm indicators

(5) Zoom indicator (6) Copy ratio display (%) key

(9)(8)

(13)

∗1

(7) Display (8) ON LINE indicator (9) Power save indicator (10) Zoom keys (11) Copy quantity keys (12) Clear key (13) Print key and ready indicator

∗1

Drum replacement required indicator

When the drum counter reaches 17,000 copies, the indicator lights up. After 1,000 additional copies are made, the indicator starts blinking and machine will hard-stop (after current job) until a new cartridge is installed.

Misfeed indicator

TD cartridge replacement required indicator

When toner density is lower than a specified level, the TONER DEVELOPER CARTRIDGE REPLACEMENT indicator lights up to warn the user. If toner is not added after approximately 10 sheets are copied, the indicator starts blinking and machine starts to supply toner.(Toner Developer cartridg replacement indicator keeps lighting up) If toner density is not back to specific level after two minutes, the READ indicator goes out and Toner Developer indicator starts blinking, and the copier stops.

∗2 ON: Indicates that the machine is in the energy saving (pre-heat) mode.

Blink: Indicates that the machine is in the process of resetting from the energy saving mode or just after supplying the power. OFF: Indicates that resetting from the energy saving mode is completed and that the fusing temperature is in ready state. The combinations of the above display lamps are as follows: (● = ON, ✕ = OFF)

Lamp Immediately after power ON Ready Copying Pre-heat lamp Blink ✕✕ Ready lamp ●●✕ Other lamps ●●●

Copy is started during

resetting from energy

saving mode

Lamp

Energy saving mode (Pre-

heating)

Energy saving mode

(Auto power shut off)

Resetting from energy

saving mode

Pre-heat lamp ●●Blink Blink Ready lamp ●✕●✕ Other lamps ●✕●●

4-2

3. Internal

AL-1000/1010

(1)

(5)

(2)

(6)

(3)

(4)

(8)

(7)

(1) TC cartridge lock release button (2) TD cartridge (3) Drum cartridge (4) Drum cartridge handle (5) Paper feed roller (6) Fusing unit release lever (7) Charger cleaner (8) Transfer charger

4-3

AL-1000/1010

4. Motors and solenoids

(3)

(2)

(4)

(1)

(5)

(7)

(6)

No. Part name Control signal Function,operation

(1) Main motor MM Drives the copier. (2) Mirror 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 (7) Multi paper feed solenoid MPFS Multi manual pages feed solenoid

4-4

5. Sensors and switches

AL-1000/1010

(1)

(2)

(3)

(4)

(5)

(6)

(9)

(7)

(8)

No. Name Signal Type Function Output

Mirror home position

(1)

sensor

(2) POD sensor POD Transmissions sensor Paper exitdetection “H” at paper pass (3) PPD2 sensor PPD2 Transmission sensor

Cassette detection

(4)

switch Manual feed detection

(5)

switch

(6) PPD1 sensor PPD1 Transmission sensor

(7) Door switch DSW Micro switch

(8) Door switch DSW Micro switch

(9) Drum reset switch DRST Micro switch

MHPS Transmission sensor

CED1 Microswitch

MFD Transmission sensor

Mirror (scanner unit) home position detection

Paper transport detection 2

Cassette installation detection

Manual feed paper detection (single only)

Paper transport detection 1

Door open/close detection (safety switch for 5V)

Door open/close detection (safety switch for 24V)

New drum detection switch

“H” at home position

“L” at paper pass

“H” at cassette insertion

“L” at paper detection

“L” at paper pass

1 or 0V of 5V at door open

1 or 0V of 24V at door open

Instantaneously “H” at insertion of new drum

4-5

AL-1000/1010

6. PWB unit

(1)

(2)

(5)

(8)

(6)

(4)

(3)

(7)

No. Name Function

(1) Exposure lamp invertor PWB Exposure lamp (Xenon lamp) 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

4-6

7. Cross sectional view

AL-1000/1010

(2)

(1)

(5)

(3)

(4)

(6)

(15)

(14)

(13)

(7) (8)

(9)

(10)

(11)

(12)

No. Part name Function and operation

(1) Scanner unit (2) Exposure lamp Exposure lamp (Xenon lamp) Illuminates original

(3) Lens unit Scans the original image with the lens and the CCD. (4) LSU (Laser unit) Converts the original image signal into laser beams and writes onto the drum. (5) Paper exit roller Roller for paper exit (6) Main charger Provides negative charges evenly to the drum surface. (7) Heat roller Fuses toner on the paper. (Teflon roller) (8) Pressure roller Fuses toner on the paper. (Silicon rubber roller)

(9) Drum Forms images. (10) Transfer unit Transfers images onto the drum. (11) Pickup roller Picks up the manual feed paper. (In multi feed only)

(12)

(13) (14) PS roller unit Takes synchronization between the lead edge and the rear edge of the paper.

(15) Paper feed roller Picks up a sheet of paper from the cassette.

Manual paper feed tray

Manual paper feed roller

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

Tray for manual feed paper

Transport the paper from the manual paper feed port.

4-7

AL-1000/1010

[5] UNPACKING AND INSTALLATION

1. A WORD ON COPIER INSTALLATION

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

Do not install your copier in areas that are:

● damp, humid, or very dusty

● exposed to direct sunlight

● subject to extreme temperature or humidity changes, e.g.,

near an air conditioner or heater.

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

8"(20cm)

● poorly ventilated

4" (10cm)

(10cm)

2. CHECKING PACKED COMPONENTS AND ACCESSORIES

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

Power cord

Operation manual

Copier

TD cartridge

5-1

Drum cartridge

(installed in copier)

AL-1000/1010

3. UNPACKING

Unpack the copier and carry it to the installation location by holding the handles on both sides of the copier.

4. REMOVING PROTECTIVE PACKING MATERIALS

(1) Remove pieces of tape (a), (b), (c), (d), (e), (f), (g) and (h)

and protective cover (i). Then open the original cover and remove protective materials (j) and (k).

(2) Remove the CAUTION tape from the front cover and

remove the two protective pins from the fusing unit by pulling the strings upward one at a time.

CAUTION tape

Protective pins

(3) Push gently on both sides of the front cover to open the

cover.

(2) Use a coin (or suitable object) to remove the screw.

Store the screw in the paper tray because it will be used if the copier has to be moved.

5. INSTALLING THE TD CARTRIDGE

(1) Open the side cover while pressing the side cover open

button.

(4) Remove the TD cartridge from the bag. Remove the

protective paper. Hold the cartridge on both sides and shake it horizontally four or five times.

(5) Hold the tab of the protective cover and pull the tab to your

side to remove the cover.

(6) Gently insert the TD cartridge until it locks in place, while

pushing the lock button.

Lock button

5-2

AL-1000/1010

(7) Close the front cover and then the side cover by pressing

the round projections near the side cover open button.

6. LOADING COPY PAPER (installing the paper tray)

(1) Raise the handle of the paper tray and pull the paper tray

out until it stops.

(4) Adjust the paper guides on the paper tray to the copy paper

width and length.Squeeze the lever of paper guide (A) 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.

Paper guide (A)

(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 which has been removed in

step 2 and the screw which has been removed when unpacking (see page 5-2, step 2 of REMOVING PROTECTIVE PACKING MATERIALS) in the front of the paper tray. To store the pressure plate lock, rotate the lock to fix it on the relevant location.

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

7. PLUGGING IN THE COPIER

(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.

Pressure plate lock

Screw

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

5-3

[6] Printing process

(1) Functional diagram

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

Main charger

AL-1000/1010

OPC layer (20microns thick) Pigment layer (0.2 to 0.3 microns thick) Aluminium 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 blad e

Waste toner box

Paper release Fusing

Heat roller

Heater lamp

Cleaning

Separation

Electrode

Charge

6-1

Drum

Transfer

Transfer charger

Transfer high voltage unit

Developing

Cassette

paper feed

Synchronization

with drum

Toner

Developer

PS roller

Manu al fee d

Pr int process

Paper transport route

AL-1000/1010

(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 transfered 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.

Semiconductor laser

Exposure (semiconductor laser)

Drum surface charge sfter the exposure

Non-image area Image area

OPC layer

Pigment layer

Aluminum drum

OPC layer

Pigment layer

Aluminum layer

(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.

About

DC5.5KV

(–580V/–400V)

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-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.

6-2

–400V ± 8V

MG roller

AL-1000/1010

Non-image area

-600

Drum surface potential

-400

Developing bias

Image area

Residual potential (-50 to -100V)

Charge Exposure D eveloping Transfer

Toner attract potential

Time

Charge

Discharge

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

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.

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 elimate 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 l aser

Charge by the Scorotron charger Function

The Scorotron charger functions to maintain the surface potential of the drum even at all times which. It is used to 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.

About DC 5.2kV

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.

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 at tract potenti al

Low

High

Print potentioal

Developing bias

Drum potential

Time

6-3

AL-1000/1010

Start

1) Because the grid potential is at a low level, the drum poten-

tial 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 photoconduc-

tor potential is switched from LOW to HIGH.

3) Once developing bias (–400V) is applied and the photo con-

ductor 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. Therfore, carrier will not make a deposit on the drum surface.

6-4

[7] OPERATIONAL DESCRIPTIONS

(1) Outline of operation

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

(Basic configuration)

AL-1000/1010

Operation

section

Printer section

Scanner section

MCU (Main control/image process section)

LSU (Laser unit) Laser diode, Polygon mirror lens

Laser beam

Process section

Cassette paper

feed section

CCD

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.

7-1

AL-1000/1010

(2) Scanner section

1) How to scan documents

The scanner has sensors that are arranged in a line. These sensors scan a certain area of a document at a time and deliver outputs sequentially. When the line is finished, the next line is scanned, and this procedure is repeated. The figure below shows the case where the latter two sections of an image which are scanned are shown with solid lines and the former two sections which are being transmitted are shown with dotted lines. The direction of this line is called “main scanning direction,” and the scanning direction “sub scanning direction.” In the figure above, one line is divided into 4 sections. Actually, however, one line is divided into thousands of sections. For scanning, the light receiving element called CCD is used. The basic resolution indicates the scanner capacity. The basic resolution is expressed in dpi (dot/inch) which shows the number of light emitting elements per inch on the document. The basic resolution of this machine is 400dpi. In the sub scanning direction, at the same time, the motor that drives the optical system is controlled to scan the image at the basic resolution.

Main scanning direction

Sub scanning direction

Original

Image data sent to the ICU PWB

5 4 3 2

Sensor scanning area

To MCU PWB

2) Basic structure of scanner section

(1)

(11)

(4)

(7)

1 Copy lamp (Xenon lamp) 2 Reflector (light conversion plate) 3 No. 1 mirror 4 No. 2 mirror 5 No. 3 mirror 6 Lens 7 No. 2/3 mirror unit 8 Copy lamp unit 9 CCD

10 Mirror motor 11 MHPS (Mirror home position sensor)

The scanner unit performs scanning in the digital optical system. The light from the light source (Xenon lamp) is reflected by a document and passed through three mirrors and reduction lenses to the CCD element (image sensor) where images are formed. This system is known as the reduction image sensor system. Photo energy on the CCD element is converted into electrical signals (analog signals). (Photo-electric conversion). The output signals (analog signals) are converted into digital signals (A/D conversion) and passed to the MCU (main control/image process section). The resolution at that time is 400dpi. The mirror unit in the scanner section is driven by the mirror motor. The MHPS is provided to detect the home position of the copy lamp unit.

(2)

(3)

(8)

(6)(5)

(9)

(10)

7-2

AL-1000/1010

(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.

1) 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 BF PWB works for measurement of the laser writing start point.

(3)

(5)

No. Component Function

(1) Semiconductor laser Generates laser beams. (2) Collimator lens

Polygon mirror,

(3)

polygon motor BD (Mirror, lens,

(4)

PWB)

(5) fθ lens

(1)(2)

(4)

: Laser beam

path for BF PWB

Converges laser beams in parallel.

Reflects laser beams at a constant rpm.

Detects start timing of laser scanning.

Converges laser beams at a spot on the drum.

Makes the laser scanning speeds at both ends of the drum same as each other. (Refer to the figure below.)

2) Laser beam path

3) 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:

Polygon motor section:

0.20 ±0.03mW (Laser wavelength 780 – 795nm)

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

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

a ≠ b ≠ c

ab c

LENS

d = e = f

def

7-3

AL-1000/1010

Fuser section

1. General description

General block diagram (cross section)

Thermal fuse

Separator pawl

PPD2

B. 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.

C. 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.

Thermistor

Heat roller

Paper guide

Pressure roller

Top view

Thermal fuse

Heater lamp

Heat roller

Thermistor

Separator pawl

A. Heat roller

A pressure 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.

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˚C ∼ 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.

D. Fusing resistor

Fusing resistor

This model is provided with a fusing resistor in the fusing section to improve transfer efficiency. General descriptions are made in the following.

General descriptions

Since the upper heat roller is conductive when copy paper is highly moistured and the distance between the transfer unit and the fusing unit is short, the transfer current leaks through the copy paper, the upper heat roller and the discharging brush.

7-4

Paper feed section and paper transport section

1. Paper transport path and general operations

AL-1000/1010

(2)

(1)

(5)

(3)

(4)

(6)

(7) (8)

(9)

(10)

(11)

(13)

(15)

(1) Scanner unit (6) Main charger (11) Pickup roller (2) Copy lamp (7) Heat roller (12) Manual paper feed tray (3) Lens unit (8) Pressure roller (13) Manual paper feed roller (4) LSU (Laser unit) (9) Drum (14) PS roller unit (5) Paper exit roller (10) Transfer unit (15) 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 allow you to install or remove the tray from the front cabinet. The general descriptions on the tray paper feed and the manual paper feed are given below.

(14)

(12)

A. 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.

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

7-5

AL-1000/1010

3. After about 0.1 sec from when the main motor start rotating, the tray paper feed solenoid (PFS) turns on at 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.

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

4. After more than half rotation of the pick-up roller, the paper feed latch is brought in contact with the projection of 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 pick-up 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.

PFS

RRS

OFF

7-6

+ 108 hidden pages