SHARP Sf2218 Service Manual

SERVICE MANUAL

CODE: 00ZSF2218/A1E

MODEL SF-2218

CONTENTS

[ 1 ] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 1

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

[ 3 ] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 1

[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1

[ 5 ] DESCRIPTION ON EACH SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1

[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1

[ 7 ] ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1

[ 8 ] SIMULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 1

[ 9 ] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 1

[10] MEMORY TROUBLES, FLOWCHART FOR REPLACEMENT OF

MAIN CONTROL PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 1

[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 1

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

Parts marked with "!" is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

This document has been published to be used

SHARP CORPORATION

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

Contents

[1] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . 1-1

1. Product features . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2. System configuration (op tions) . . . . . . . . . . . . . 1-1

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

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

2. Description of each section . . . . . . . . . . . . . . . . 2-2

3. Supply parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

4. Optional specifications . . . . . . . . . . . . . . . . . . . 2-3

(1) Automatic document feed er (ADF) . . . . . . 2-3

(2) 10-bin sorter . . . . . . . . . . . . . . . . . . . . . . . 2-3

(3) 10-bin staple sorter (10-bin SS) . . . . . . . . 2-4

(4) Exclusive-use desk . . . . . . . . . . . . . . . . . . 2-4

[3] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . 3-1

1. External view and internal structure . . . . . . . . . 3-1

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

3. Clutches, solenoi ds, and m ot ors . . . . . . . . . . . . 3-3

4. PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

5. Sensors and switches . . . . . . . . . . . . . . . . . . . . 3-5

6. Rollers, mirrors, etc. . . . . . . . . . . . . . . . . . . . . . 3-6

[4] UNPACKING AND INSTALLATION . . . . . 4-1

1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

(1) Environment . . . . . . . . . . . . . . . . . . . . . . . 4-1

(2) Space around the machine . . . . . . . . . . . . 4-2

(3) Installation base . . . . . . . . . . . . . . . . . . . . 4-2

(4) Power source . . . . . . . . . . . . . . . . . . . . . . 4-2

(5) Grounding wire connection . . . . . . . . . . . . 4-2

3. Optical system lock release . . . . . . . . . . . . . . . . 4-3

A. No. 2/3 mirror unit lock rel ease . . . . . . . . . 4-3

B. Lens and No. 4/5 mirror unit lock release . 4-3

4. Charger cleaning . . . . . . . . . . . . . . . . . . . . . . . . 4-3

A. Main charger unit electrode cleaning . . . . 4-3

5. Developing unit setting . . . . . . . . . . . . . . . . . . . 4-4

A. Developing unit setting . . . . . . . . . . . . . . . 4-4

6. Toner density sensor level a djustment . . . . . . . 4-5

A. Developing unit level adjus tment . . . . . . . 4-5

7. Accessory installation . . . . . . . . . . . . . . . . . . . . 4-5

A. Copier tray installation . . . . . . . . . . . . . . . 4-5

8. Toner supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

9. Center shift adjustment . . . . . . . . . . . . . . . . . . . 4-7

10. Label attachment . . . . . . . . . . . . . . . . . . . . . . . . 4-7

A. Label attachment . . . . . . . . . . . . . . . . . . . 4-7

[5] DESCRIPTIONS OF EACH SECTION . . 5-1

1. Paper feed section . . . . . . . . . . . . . . . . . . . . . . 5-1

1) General descriptions . . . . . . . . . . . . . . . . . 5-1

2) Basic operations . . . . . . . . . . . . . . . . . . . . 5-1

2. Developing section . . . . . . . . . . . . . . . . . . . . . . 5-2

1) General descriptions . . . . . . . . . . . . . . . . . 5-2

2) Basic composition . . . . . . . . . . . . . . . . . . . 5-2

3) Basic operations . . . . . . . . . . . . . . . . . . . . 5-3

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

1) General description . . . . . . . . . . . . . . . . . 5-3

2) Basic operations . . . . . . . . . . . . . . . . . . . . 5-6

4. Copy process . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

1) Photoconductor . . . . . . . . . . . . . . . . . . . . 5-8

2) Process diagram . . . . . . . . . . . . . . . . . . . . 5-9

3) Details of image forming process . . . . . . 5-10

4) Transition of photoconductor surface

potential . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5) Photoconduct or drum sensitivi t y

correction . . . . . . . . . . . . . . . . . . . . . . . . 5-14

6) Process control function . . . . . . . . . . . . . 5-14

5. TRANSPORT/FUSING SECTION . . . . . . . . . 5-16

1) General . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

2) Basic compositi on and functions . . . . . . 5-16

6. Fusing paper exit section . . . . . . . . . . . . . . . . 5-16

7. High voltage section . . . . . . . . . . . . . . . . . . . . 5-17

1) General . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

2) Basic composition . . . . . . . . . . . . . . . . . . 5-17

[6] DISASSEMBLY AND ASSEMBLY . . . . . . 6-1

1. Paper feed unit . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

1-1. Paper feed unit . . . . . . . . . . . . . . . . . . . . . 6-1

1-2. Paper feed roller ass’y removal . . . . . . . . 6-1

1-3. PS front roller ass’y . . . . . . . . . . . . . . . . . 6-2

1-4. Separation roller . . . . . . . . . . . . . . . . . . . . 6-2

1-5. Paper feed roller, take-up roller . . . . . . . . 6-2

2. Transport unit . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

2-1. Resist roller, transfer roller . . . . . . . . . . . . 6-3

2-2. Transport belt . . . . . . . . . . . . . . . . . . . . . . 6-4

3. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

3-1. Fusing unit removal . . . . . . . . . . . . . . . . . 6-4

3-2. Heater lamp replacement . . . . . . . . . . . . . 6-5

3-3. Upper heat roller ass’y removal . . . . . . . . 6-5

3-4. Upper separation pawl replacement . . . . . 6-5

3-5. Lower heat roller replacement . . . . . . . . . 6-5

3-6. Lower separation pawl replacement . . . . . 6-6

3-7. Thermistor/thermostat removal . . . . . . . . . 6-6

4. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

1) Copy lamp replaceme nt . . . . . . . . . . . . . . 6-6

2) Mirror ba se wi re replacement an d

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 6-7

3) No. 2/3 mirror unit (mirror base B) installation (Mirror base B positioning) . . . 6-9

4) Copy lamp unit ins tallation

(Mirror base A positioning) . . . . . . . . . . . 6-10

5) No. 4/5 mirror unit (mirror base C)

replacement . . . . . . . . . . . . . . . . . . . . . . 6-10

6) Lens wire replacemen t . . . . . . . . . . . . . . 6-12

7) Lens unit replacement . . . . . . . . . . . . . . 6-15

5. High voltage section . . . . . . . . . . . . . . . . . . . . 6-15

5-1. Main charger (MC) unit . . . . . . . . . . . . . . 6-15

5-2. Transfer/separation charger (TC/SC)

unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

6. Process section . . . . . . . . . . . . . . . . . . . . . . . 6-17

6-1. Process unit . . . . . . . . . . . . . . . . . . . . . . 6-17

6-2. Waste toner bottle replacement

(required when waste toner full detection/

maintenance) . . . . . . . . . . . . . . . . . . . . . 6-17

6-3. Drum (Replace every 60K copies) . . . . . 6-18

6-4. Blank lamp unit

(Clean every 60K copies.) . . . . . . . . . . . 6-18

6-5. Discharge lamp unit

(Clean every 60K copies.) . . . . . . . . . . . 6-19

6-6. Cleaner blade

(Replace every 60K copies.) . . . . . . . . . . 6-19

6-7. Drum separation pawl

(Replace every 60K copies.) . . . . . . . . . . 6-19

6-8. Process control PWB (Clean the sensor

section every 60K copies.) . . . . . . . . . . . 6-19

6-9. Drum mark sensor PWB (Clean the sensor

section every 60K copies.) . . . . . . . . . . . 6-19

6-10. Toner reception seal (Replace every 60K

copies.) . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19

7. Developing section . . . . . . . . . . . . . . . . . . . . . 6-20

A. DV side seals F/R repla cem ent

(Replace every 120K copies.) . . . . . . . . . 6-20

B. DB blade replacement

(Replace every 120K copies.) . . . . . . . . . 6-20

C. V ring attachment . . . . . . . . . . . . . . . . . . 6-20

D . Note for to ner hopper drive g ear (31T)

and stirring shaft attachment . . . . . . . . . 6-21

8. Operation panel/interm ediate cabinet . . . . . . . 6-21

9. Frame major parts . . . . . . . . . . . . . . . . . . . . . . 6-21

9-1. Cooling fan motor replacement . . . . . . . . 6-21

9-2. Power unit . . . . . . . . . . . . . . . . . . . . . . . . 6-22

9-3. Tray size detecting PWB . . . . . . . . . . . . 6-22

9-4. Main PWB unit . . . . . . . . . . . . . . . . . . . . 6-23

9-5. AC power PWB . . . . . . . . . . . . . . . . . . . . 6-23

9-6. Ozone filter (Check every 60K copies,

and clean every 300K copies.) . . . . . . . . 6-23

10. Multi paper feed unit . . . . . . . . . . . . . . . . . . . . 6-24

10-1. Separation roller . . . . . . . . . . . . . . . . . . . 6-24

10-2. Take-up roller/paper feed roller . . . . . . . 6-24

[7] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1. Developing section . . . . . . . . . . . . . . . . . . . . . . 7-1

1-1. Developing doctor clearance

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1-2. Developing magnet roller main pole

position adjustment . . . . . . . . . . . . . . . . . . 7-1

2. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

2-1. Adjustment items . . . . . . . . . . . . . . . . . . . 7-2

2-2. Note for adjustments . . . . . . . . . . . . . . . . 7-3

2-3. Adjustment of each section . . . . . . . . . . . 7-4

A. Lens reference posi tion adjustment . . . . . 7-4

B. No.4/5 mirror reference position

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-4

C . Vertical copy magnificatio n ratio

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-5

D . Resolution adjustment

(Focus adjustment) . . . . . . . . . . . . . . . . . . 7-6

E. Horizontal copy magnification rat i o

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-8

F. Comparison table of lens value s and

simulation input values . . . . . . . . . . . . . . . 7-9

G. Vertical skew adjsutment . . . . . . . . . . . . 7-10

H. Horizontal skew adj ustm ent . . . . . . . . . . 7-10

I . Center shift adjustm ent . . . . . . . . . . . . . . 7-12

J. Exposure balance adjustment . . . . . . . . 7-12

K. Copy lead edge adjustment . . . . . . . . . . 7-13

2-4. Copy density adjustment . . . . . . . . . . . . 7-16

2-5. Process section adjustment . . . . . . . . . . 7-20

[8] SIMULATION . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

2. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

3. Operating procedur e . . . . . . . . . . . . . . . . . . . . . 8-1

4. List of simulations . . . . . . . . . . . . . . . . . . . . . . . 8-2

5. Details of simulations . . . . . . . . . . . . . . . . . . . . 8-3

6. User simulation . . . . . . . . . . . . . . . . . . . . . . . 8-16

(1) Functions which can be set and

canceled by the user simulation . . . . . . . 8-16

(2) User simulation . . . . . . . . . . . . . . . . . . . 8-16

(3) User simulation code table . . . . . . . . . . . 8-17

(4) Department counter set ting content

(Set with user program P10 ∼ P15) . . . . 8-17

[9] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . 9-1

1. Summary/purpose . . . . . . . . . . . . . . . . . . . . . . . 9-1

2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

3. Clearing the self diag display . . . . . . . . . . . . . . 9-1

[10] SERVICING AT MEMORY TROUBLE

AND MAIN CONTROL PWB REPLACEMENT

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

2. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

3. Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

4. Set value recording sheet . . . . . . . . . . . . . . . . 10-3

5. Memory simulation list . . . . . . . . . . . . . . . . . . . 10-4

. . . . . . . . . . . . . . . . . . . . . . . 10-1

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

1. Maintenance cycle and maintena nce items . . 11-1

[12] ELECTRICAL SECTION . . . . . . . . . . . . . . 12-1

1. System block diagram . . . . . . . . . . . . . . . . . . . 12-1

2. Main circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

(1) Block diagram . . . . . . . . . . . . . . . . . . . . . 12-3

(2) CPU (IC6) SC3041K12F . . . . . . . . . . . . . 12-4

(3) Detector circuit of sensor signal . . . . . . . 12-8

(4) Start/stop control circuit . . . . . . . . . . . . . 12-8

(5) Heater lamp control circuit . . . . . . . . . . . 12-9

(6) Driver circuit (Solenoid, electromagnetic

clutch) . . . . . . . . . . . . . . . . . . . . . . . . . . 12-10

(7) Stepping motor drive circuit . . . . . . . . . 12-10

(8) AE (Auto Exposure) sensor circuit . . . . 12-11

(9) Toner supply motor dri ve circuit . . . . . . 12-11

(10) Reset IC (IC13) . . . . . . . . . . . . . . . . . . . 12-11

(11) Operation panel . . . . . . . . . . . . . . . . . . 12-12

(12) EnergyStar circuit description . . . . . . . . 12-13

[1] PRODUCT OUTLINE

1. Product features

(1) Compact body

• Compact body size

The body width of 600mm is the smallest in the class.

• The employment of the front loading tray and the folding-type multi

manual paper feed cassette realizes the small occupying area. (Option)

2. System configuration (options)

(2) Clean copy gentle to the environment

• Silent design,

• Low level of ozone, use of recyclable materials

• The energy-saving mode reduces the power consumption.

(3) High capacity of copying

• Warm-up time is less than 35 sec. The first copy of 5.3 sec.

(4) Fully expandable system. (Refer to "2. System configuration.")

Automatic document feeder SF-A18

10-bin sorter SF-S17 N

Note: When installing the SF-S54, the exclusive-use desk (SF-DS17) is reguired.

Tray (reserve) SF-UB15

Exclusive-use desk

SF-DS17

10-bin staple sorter SF-S54

1 – 1

[2] PRODUCT SPECIFICATIONS

1. Basic specifications

(1) Type: Table top (2) Copy speed:

Normal

A3 10 sheets/min 10 sheets/min

B4 12 sheets/min 12 sheets/min 12 sheets/min A4 (Portrait) 18 sheets/min 14 sheets/min 14 sheets/min A4 (Landscape) 14 sheets/min 14 sheets/min 14 sheets/min 81⁄2 × 13″ 12 sheets/min 12 sheets/min 12 sheets/min

(Note) The copy speeds for enlargement and reduction are minimum

speed values. (3) Warm up time: 35 sec or less (4) First copy time: 5.3 sec (Tray) (5) Jam recovery time: 8 sec (Conditions: After leaving the door

open for 60 sec, the standard conditions) (6) Multi copy Max. 250 sheets (7) Original

Max. original size A3 Reference original size Left side/Center Original sensing No

(8) Copy magnification ratio

Fixed magnification: AB series: 200, 141, 122, 115, 100, 86, 81,

70, 50% (9 steps)

Zoom range: 50% ∼ 200% (151 steps by the increment of 1%)

(9) Exposure

Exposure mode: Auto/Manual/Photo No. of manual steps: 9 steps

(10) Void width

Void area: Lead edge/rear edge: 3mm or less Image loss Normal: 4mm or less

(11) Paper exit/finishing

Paper exit tray capacity: 250 sheets Finishing: option 10-bin sorter, 10-bin staple sorter

Enlargement

(Magnification)

(200%)

Reduction

(Magnification) 10 sheets/min

(50%)

(12) Additional functions

Function Remark Auto Paper Selection × Auto Magnification ratio

Selection Shift F 1-set 2-copy F Enlargement is impossible. Edge erase F Built-in auditor

password mode Interruption F Monochrom × AICS F Pre-heat mode F Auto shut off F Auto power save F Auto tray switching × Cover insertion × OHP insertion paper × Overlay ×

(13) External dimensions

W x D x H 600 × 595 × 365 mm Occupying area (W x D) 885 × 595 mm Weight 41.0Kg

(14) Power source

Voltage: 220 ∼ 230V 50/60Hz

240V 50Hz

Frequency: 50/60Hz common

(15) Power consumption

Max. power consumption

Energy efficiency 64Wh/h or less Auto power shut

off (for EPA)

1.5kw (Note) Max. when the

5W or less

F 20 departments

option is installed

2 – 1

2. Description of each section

(1) Paper feed section

Copying size A3 ∼ A6/Ledger ∼ Invoice Paper feed system 1 tray + multi manual feed Paper feed capacity 250 sheets × 1

Cassette Paper size Paper weight Paper kind

Tray

Multi manual paper feed

Multi

Single

AB series: A3 ∼ A5

AB series: A3 ∼ A6R

56 ∼ 80g/m

52 ∼ 128g/m

Standard paper,

recycled paper Standard paper,

specified paper, special paper, OHP film, Second original paper,

postcards (without folding)

(2) Optical section

Light source Halogen lamp Exposure system Slit exposure by moving the light source Zooming system By changing the lens positions and the scan

speed.

Lens Fixed focus lens

(3) Process

Charging system (–) DC saw teeth electrode system Transfer system (–) tungsten system Separation system (AC) separation tungsten system

(4) Developing section

Developing system Dry, two-component magnetic brush

development (developer replacement)

Developing bias voltage DC–200V ±5V

(5) Fusing section

Fusing system Heat roller system Upper heat roller surface temperature 190 degrees C Heater lamp Halogen lamp 1000W × 1

3. Supply parts

Name Content Life Product name

1 Photoconductor kit Photoconductor drum x 1

Cleaner blade x 1

Drum separation pawl x 2 2 Black developer Black developer (530g) x 10 60K x 10 SF-226CD 3 Black toner Black toner cartridge (240g) x 10 6K x 10 SF-226CT 4 Upper heat roller kit Upper heat roller x 1

Upper separation pawl x 4

Fusing bearing x 1 5 Lower heat roller kit Lower heat roller x 1

Lower separation pawl x 4 6 Staple cartridge Staple cartridge (For SF-S54) x 3 5K staples x 3 SF-LS12 7 Upper heat roller Upper heat roller x 1 120K SF-216HU 8 Upper separation pawl Upper separation pawl x 4 x 10 120K x 10 SF-216UP 9 Heat roller gear Heat roller gear x 10 120K x 10 SF-216HG 10 Lower heat roller Lower heat roller x 1 120K SF-216HR 11 Lower separation pawl Lower separation pawl x 4 x 10 120K x 10 SF-216LP 12 Screen grid Screen grid x 10 120K x 10 SF-216SU 13 Cleaner blade Cleaner blade x 10 6K x 10 SF-216CB 14 Charging plate Charging plate x 10 120K x 10 SF-216PU 15 Ozone filter Ozone filter x 10 300K x 10 SF-216FL 16 Copy lamp Copy lamp x 10 — SF-216CL 17 MC case unit MC case unit x 10 — SF-216MC

60K SF-226DR

120K SF-216HU

120K SF-220LH

2 – 2

4. Optional specifications

(2) 10-bin sorter

(1) Automatic document feeder (ADF) <Model name: SF-A18>

Original set direction Face up Original set position Center reference Original transport system Belt (half size) system Original feed sequence Bottom taking (Face up exit) Original size A3 ∼ A5 Original change speed

(S → S) Original weight 50 ∼ 128g/m Original set quantity 50 sheets, 50 ~ 80 g/cm2,

Original stop system Position control system Dimensions 571 (W) x 521 (D) x 110 (H) (mm)

Weight About 11.5kg

Power source Supplied from the copier’s power section.

Power consumption 65W

16 sheets/min

80 ~ 128 g/m2 thickness max. 5 mm

(Height: excluding the tray)

Functions

Original sensing on the tray

Sensing size AB series: A3, B4, A4, A4R, A5 Original mixture Allowed (However, no linkage with the AMS) Original reverse NO

YES (Scanning read for uncertain size originals.)

Type Copier installation type/Hanging type Distribution system Bin shift by lead screw No. of bins 10 bins (The top bin is used also for

non-sort.)

Capacity 30 sheets/bin A4, 100 sheets for the

top bin only.

Sorting 30 sheets (A4)

15 sheets (B4) 15 sheets (A3)

Grouping 20 sheets (A4)

15 sheets (B4) 15 sheets (A3)

Paper size (Non-sort) A3 ∼ A6 (Postcard)R/2"

(Sort/group) A3 ∼ A5 Paper transport Center reference Paper reception Face up Paper weight (Non-sort) 52 ∼ 128g/m

(Sort/group) 56 ∼ 80g/m Dimensions 335 (W) x 493 (D) x 298 (H) (mm)

(Width: Including the tray.) Weight 8.6kg [9.8kg Including mounted fittings] Power source Supplied from the copier. DC24V (1.2A) Power consumption Max. 30W

2 – 3

(3) 10-bin staple sorter (10-bin SS) <Model name: SF-S54>

Type Copier installation type/hanging type Distribution system Bin shift system by lead screw No. of bins 10 bins (The top bin is commonly used

for non-sort.

Capacity 30 sheets for each bin

(A4, 80g/m2) 100 sheets for the top bin

Sort 30 sheets (A4)

15 sheets (B4) 15 sheets (A3) 80g/m

Grouping 20 sheets (A4)

15 sheets (B4) 15 sheets (A3), 80g/m

Staple sort 30 sheets (A4)

15 SHEETS (B4) 15 sheets (A3) 80g/m

Paper size Non-sort A3 ∼ A6R

Sort/group A3 ∼ A5 Staple sort A3, B4, A4, A4R, B5

Alignment (Sorting) Max. shift 2mm (Alignment operation)

Staple section

Type Copier stapler Stapling time 1.8 sec No. of stapled sheets 30 sheets (80g/m2) Binding reference Front reference Staple supply Cartridge (5,000 pcs.) Staple SF-LS12 No staple/no cartridge/

Available

no stapler detection Staple jam detection Available Manual staple mode Available (excluding manual stapling)

Note: When installing the SF-S54, the exclusive-use desk (SF-DS17)

is required.

(4) Exclusive-use desk

SF-DS17

Dimensions 570(W) × 523(D) × 520(H)mm Weight About 19.5kg Functions Caster Provided

Adjuster None Door None

Paper transport Center reference Paper loading Face up Paper weight Non-sort 49 ∼ 128g/m

Sort/group/staple sort 56 ∼ 80g/m

Dimensions 390(W) × 542(D) × 400(H)mm Weight About 11.5kg, 15kg [including the

installation kit] Power source DC24V (1.5A) supplied from the copier. Power consumption Max. 36W

2 – 4

[3] PRODUCT VIEWS

1. External view and internal structure

5 6

11 12

14 15

No. Name No. Name No. Name

1 Original cover 2 Original table 3 Paper exit tray 4 Grip 5 Manual feed original guide 6 Manual feed tray 7 Operation panel 8 Front cover 9 Power switch F Paper tray G Developing unit grip H Toner hopper I Fusing unit J Developing unit lock lever K Release lever L Drum

3 – 1

2. Operation panel

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

200%

5111117

SORTER

SORT

STAPLE SORT

GROUP

DUAL PAGE COPY

MARGIN SHIFT

EDGE ERASE

EXPOSURE

AUTO MANUAL PHOTO

12345

LIGHT DARK

PAPER SIZE

814

EXTRA

TRAY SELECT

No. Name No. Name No. Name

1 SORTER key and indicators 2 DUAL PAGE COPY key and indicator 3 MARGIN SHIFT key and indicator 4 AUTO/MANUAL/PHOTO key and

5 PAPER SIZE indicators 6 Misfeed indicator

indicators

7 Paper feed location/misfeed location

8 Preset ratio indicators 9 Copy quantity display

indicators

F Maintenance required indicator G Developer replacement required

indicator

I 10-key pad J POWER SAVE indicator K AUDIT CLEAR key L EDGE ERASE key and indicator M LIGHT and DARK keys and indicators N TRAY SELECT key O Paper required indicator P Copy ratio selector keys Q ZOOM indicator R Copy ratio display key S Zoom keys T INTERRUPT key and indicator U Zero/readout key V Clear key W Print button and READY indicator X Clear all key

8 8

11 17 8

11 8

11 17

xxx

100%

x x

141%

11 17

129%

11 17

121%

95%

77%

ZOOM INTERRUPT

64%

50%

1 45

POWER SAVE AUDIT CLEAR

23 24 25 26 27 2822212019181716

H Toner required indicator

3 – 2

3. Clutches, solenoids, and motors

Clutches and solenoids

No. Signal name Name Functions, operations

1 PSPS Paper separation solenoid Paper separation solenoid drive 2 RRC Resist roller clutch For resist roller rotation 3 TRC Transport roller clutch For transport roller rotation 4 CPFC1 Tray paper feed clutch For paper feed roller rotation 5 MPFS Manual paper feed solenoid For pressing take-up roller

Motors

No. Signal name Name Functions, operations Type

6 VFM Ventilation fan motor Used to ventilate around the fusing section, cools

down the machine, and remove ozone.

7 MM Main motor Used to drive the body. DC brush 8 CFM Optical system cooling fan Used to cool and ventilate the optical system. DC brushless 9 LM Lens motor Used to move the optical lens. DC stepping F TM Toner motor Used to stir toner. DC synchronous G MRM Mirror motor Used to move the mirror base. DC stepping H SMF Suction fan motor Used to ventilate the suction section. DC brushless

DC brushless

3 – 3

4. PWB

13 12 10

3 4 51 2

No Name Description No Name Description

1 Operation PWB A Operation input, display control 2 Operation PWB B Operation input, display control 3 Blank lamp PWB Used to control the blank lamp. 4 DL PWB Used to drive the discharge lamp. 5 Optical PWB AE sensor and lens motor interface 6 Process control PWB Used to sense the toner density. 7 Main PWB Used to control the body. 8 AC circuit PWB AC power input 9 CSD PWB Used to sense the body cassette

size.

G PID PWB Manual paper entry detection H PPD PWB Body PR roller JAM detection I High voltage PWB Process high voltage, developing

bias voltage supply

K Mark sensor PWB Drum marking point detection L Sub DC power PWB Supplies power in the energy

F DC circuit PWB DC power input

J POD PWB Body paper exit section JAM

detection, ventilation fan motor interface

saving mode. (Supplies 5V to the main PWB and the operation PWB.)

3 – 4

5. Sensors and switches

2 3 5 4 6

No. Signal name Name Type Operation, function

1 TCS Toner density control sensor Transmission sensor HIGH when toner density falls. 2 ILSW Front cabinet open/close switch Interlock switch ON when closed. 3 MSW Power switch Seesaw switch 4 TH Fusing heater thermistor Thermistor Greater resistance at low

temperature

5 TS Fusing heater thermostat Thermostat Contact open at abnormally high

temperature

6 POD Paper exit paper sensor Transmission photo sensor LOW when paper is present. 7 MHPS Mirror home position sensor Transmission photo sensor HIGH when paper is sensed. 8 MMRE Main motor encoder Transmission photo sensor Rotation pulse output 9 TFD Waste toner full switch Lead switch HIGH when sensed. F LHPS Lens home position sensor Transmission photo sensor LOW when reduction. G PPD Paper transport sensor Transmission photo sensor LOW when paper is present. H PED1 Body upper tray paper presence detection Transmission photo sensor HIGH when paper is present. I DPPD1 Body upper tray paper transport sensor Transmission photo sensor LOW when paper is present. J PID Single manual feed paper entry sensor Transmission photo sensor HIGH when paper is present.

3 – 5

6. Rollers, mirrors, etc.

3 4 567 8

16171819202829

222324252627

32 33

38 35

No. Name No. Name No. Name

1 No. 3 mirror 2 No. 2 mirror 3 No. 1 mirror 4 Copy lamp 5 No. 4 mirror 6 No. 5 mirror 7 No. 6 mirror 8 Developing unit toner box 9 Manual tray F — G Take-up roller H Paper feed roller I Reverse roller J PS front roller follower roll K PS front roller L Developing unit M Blank lamp N Main charger unit O Photoconductor drum P Cleaner unit Q Resist roller follower roll R Resist roller S Transfer charger T Separation charger U Drum separation pawl V Suction unit W Suction belt X Fusing thermistor Y Heater lamp Z Upper heat roller [ Lower heat roller \ Transport roller (upper) follower roller ] Transport roller (upper) ^ Developing magnet roller _ Tray paper feed roller ‘ Tray paper feed reverse roller a Tray paper feed take-up roller b PE actuator

3 – 6

[4] UNP ACKING AND INSTALLATION

1. Unpacking

2 Avoid high temperature and high humidity, and avoid sudden

temperature change. (Avoid installation near a cooler or a heater.) If not, paper absorbs moisture and dew forms in the machine, causing paper jam or degraded image quality.

(Standard condition): The best condition to use the machine. 20 ∼ 25°C: 65±5%RH (Temperature and humidity): 15 ∼ 30° C

20% ∼ 85% RH 35°C for 65%

85 65

Humidity

Packing material/accessory list

Name Q’ty 1 Paper exit tray 1 2 Instruction manual 1 3 Maintenance card 1 4 Dust cover 1 5 Service contract 1 6 Installation manual 1 7 Magnification ratio select label 1

2. Installat ion

Installing conditions

The surrounding conditions of the machine affect the machine performance gr eatly. Use great car e for the following items.

(1) Enviro nm ent

1 Avoid direct sunlight, and avoid installation near the window. (Cur-

tains or blinds must be shut completely.) If not, the plastic parts and the original cover may be deformed.

Even if the window is of frosted glass, there is no difference.

15 30 35

3 Avoid dust and vibrations.

If dust enters the machine, malfunctions may occur.

4 Avoid installation on an unstable surface.

Keep the machine in level state to maintain the performance.

˚C

4 – 1

5 Avoid installation to a poorly ventilated place.

6 Avoid installation to a place where there are flammable materials

or ammonia gas, etc. If the machine is installed near a diazo copier, the picture quality may be degraded and malfunctions may occur.

(5) Grounding wire connection

Connect the grounding wire to prevent against a danger.

2 When connecting the grounding wire, connect only to the ground-

ing object (the grounding terminal of the power outlet, etc.) and never connect to a gas pipe.

7 Install near a power outlet.

(2) Space aroun d th e ma chine

Install the machine with its rear side about 10cm (6 inches) apart from the wall in order to allow space to ventilation by the cooling fan.

Also allow eno ug h space around the ma chine for prop er op eration.

(3) Installation base

Set the machine in horizontal position in the following procedure. Be sure to use a leve ling instrumen t (UKOGM0054CSZZ) to install

the machine on a flat, horizontal place. (Note) If the machine is not in horizontal position, the toner density

control function may not work normally, resulting in degraded picture quality.

(4) Power sour ce

Use the power source of the rated capacity.

2 Avoid complicated wiring. If not, the breaker or the fuse may be

overloaded.

4 – 2

3. Optical system lock release

4. Charger cle ani ng

A. No. 2/3 mirror unit lock release

Remove the one fixing screw of the No. 2/3 mirror unit on the left side of the copier.

Mirror unit fixing screw

B. Lens and No. 4/5 mirror unit lock release

Remove two fixing screws of the No. 4/5 mirror unit on the right inside of the copier. Open the fr ont cabi net and remove one fixing screw of the le ns on the lower side of the operation panel.

A. Main charger unit electrode cleaning

1 Press the hook section of the main charger unit to release lock,

and pull out and remove the main charger unit from the copier.

Hook

main charger un i t

2 Remove one fixing screw of the main charger unit (on the back

side).

Fixing screw

Electrode section

Lens fixing screw

Paper feed tray

Mirror unit fixing screw

Main charger un i t

3 Press the electrode cleaner onto the tips of the electrode so that

the tips are inserted into the cleaner a few times to clean. (Note)

• Do not move the cleaner back and forth with the electrode tips

inserted into it.

• When cleaning, clean thoroughly at one time. Avoid partial

cleaning.

Electrode cleaner

Electrode section

4 Return the electrode section to the original position and fix it with a

screw.

4 – 3

5 Insert the main charger unit along the guide groove in the copier

fully to the bottom.

3 Remove three fixing screws of the toner hopper of the developing

unit, and remove the toner hopper.

Main charger un i t

5. Developing unit setting

A. Developing unit setting

1 Open the front cabinet, remove the installation toner fixed to the

developing unit level with tape, and pull the developing unit lever toward you.

2 Hold the grip of the developing unit, and slowly pull out the

developing unit until it stops. Then hold the hand carry strap and press the developing lever,

and remove the developing unit.

Fixing screw

Toner hopper

Fixing screw

Developing unit

4 While supplying developer from the developer supply port of the

developing unit, turn the MG gear clockwise with a screwdriver or a scale to supply fully in the developing unit.

Developer

Developer supply port

DV lever

Developing unit

Hand carry strap

Grip

Developing unit

MG gear

Screwdri v er (+) or scale

5 Install the toner hopper to the developing unit and fix it with two

screws.

Fixin g scr ew

Toner hopper

Fixin g scr ew

Developing unit

4 – 4

6 Hold the hand carry strap of the developing unit and insert it into

the copier fully to the bottom.

Hand carry strap

7. Accessor y i nst all ation

A. Copier tray installation

Install the copy tray to the paper exit section on the left side of the copier.

Copy tray

Developing unit

Grip

7 Close the developing unit lever and close the front cabinet.

Developing unit lever

Front cabinet

With the above procedure, setting of the developing unit is completed.

6. Toner density sensor level adjustment

8. Toner supply

1 Open the front cabinet. 2 Pull down the developer unit lock lever and pull the developing

unit out slowly unit it stops.

3 Hold a new toner cartridge horizontally as shown and shake it four

or five times.

Toner cartridge

T urn on the copier power switch.

A. Developing unit level adjustment

1 Execute simulation 25.

2 After 3 minutes, simulation 25 is completed.

(Note) If the simulation is terminated halfway, automatic reading

is not performed. Do not terminate it halfway.

3 Cancel simulation 25 with the CA key.

4 or 5 times

4 To install the toner cartridge, insert the projection of the cartridge

into the hole on the front of the developer unit as shown to unlock the toner hopper cover.

4 – 5

5 Open the toner hopper cover. Then remove the toner cartridge.

F Slide the toner cartridge toward the rear and lift to remove it.

Sealing tape

6 Line up the protrusions at the bottom of the toner cartridge with

the notches on the toner hopper.

• Align the arrow on the toner cartridge with arrow 1 on the

toner hopper.

7 Slide the toner cartridge to the front until it stops.

• Align the arrow on the toner cartridge with arrow 2 on the

toner hopper.

G Close the toner hopper cover. H Slide the developing unit into the copier. I Return the developing unit lock lever into place and close the front

cabinet.

8 While lightly pressing down on the cartridge with your left hand,

remove on the toner sealing tape.

9 Tap lightly on the top of the toner cartridge several times to en-

sure that it empties completely.

4 – 6

9. Center shift adjustment

)

10. Label attachment

There is basically no need to perform the center shift adjustment because it is made when shipping. If the center should be shifted, adjust in the following procedures. Make a c opy. If t he center is shifted as shown in Fig. 1 or Fig. 2, loosen the four screws which are fixing the cassette grip cabinet.

Section b Section b

Section a

(Note) When fixing the cassette cabinet, the fixing screws and the

cabinet clearance a and b are in symmetry.

[Reference figure]

Direct ion A

Direc ti on B

Section b

Section a

A. Label attachment

Attach th e magnification ratio sel ect label packed together with the Opera tion manual to the position shown in the figur e below.

• When attaching the label to the copier with the original cover.

Magnification ratio select lable

• When attaching the label to the optional automatic original feeder

(SF-A18)

(1) Fig. 1

Move the cassette grip cabinet in direction A, tighten two fixing screws (a) and tow fixing screws (b) in this sequence. Make a copy again and check the center.

[Fig.1]

Image center line (First image)

Paper center line

(2) Fig. 2

Move the cassette grip cabinet in direction B, tighten two fixing screws (a) and tow fixing screws (b) in this sequence. Make a copy again and check the center.

[Fig.2]

Paper center line

Magnification ratio select lable

Ima

e center line (First image

4 – 7

[5] DESCRIPTIONS OF EACH SECTION

Descri ptions are made on the follow ing sections:

1 Paper feed section 2 Developing section 3 Optical section 4 Process section 5 Separation/transport section 6 Fusing/paper exit section 7 High voltage section

2) Basic operati ons

(Tray paper feed operat ion)

When the CPFC (Cassette paper feed clutch) turn on, the paper feed roller shaft, t he paper fe ed roller, and the ta ke-up roller rotat e in the direction of A. At the same time, the limiter spring moves down the roller release arm. As a result, the take-up roller falls by its own weight onto the paper surf ace, start ing paper feed.

Roller release arm

Take-up roller

Paper feed roller

Paper feed roller shaft

1. Paper feed secti on

1) General descriptions

To real ize the com pact desig n, the fro nt loading s ystem and th e foldable multi paper feed unit (Option for some areas) are employed.

50 Sheets

250 sheets

When the CPFC turns off, rotation stops and the take-up roller is pushed up to the original position by the roller release arm sprin g.

(Manual paper feed operation)

There is no special mechanism for manual paper feed other than the manual feed paper sensi ng actuator and the paper g uide. When the CPFC turns off, rotation stops and the take-up roller is pushed up to the original position.

The pa per fe ed tra y is of th e univer sal typ e and has cap acity of 250 sheets. The front loading system allows the tray to be loaded from the lower side of the front cabinet. Manual paper feed is made in the m ulti paper feed.

5 – 1

2. Developing secti on

1) General descriptions

(1) Two-component developer

The developer is composed of toner and carrier. Carrier serves as a me dium for attachi ng ton er onto the ele ctrostat ic image on the photocondu ctor drum. By stirring toner and carrier, they are rubbed to be charged positive (+) and negative (–) respectively. Since deve loper will deter iorate to degra de copy quality, it shou ld be replaced regularly.

(2) Two-component magnetic brush development

The rotatable non-magnetic sleeve is provided over the magnet roller and is rotated. Carrier forms a ma gnetic brush on the sleeve surfa ce by magnetic force to attach toner onto the electrostatic image on the photoconductor drum.

(3) Developing bias

When the photoconductor is charged and exposed to light (exposure ), th e surfac e poten tia l (volt ag e) of the p ho tocon duct or w ill no t be lost completely. (The residual potential remains.) Toner is attracted to the photoconductor by this residual potential, dirty ing the phot oconductor. As a r esult, a dirt y copy of whi te background is generated. To prevent against this , a voltage of the same polarity and higher than the residual potential is applied to the MG roller, preventing toner from being attached to the photoconduct o r surf a ce .

(Details of DV harness connector)

GND

*For toner density sensor

*Resistance value is identified by color

2) Basic composition

For bias

GND

Residual potent i al < D V B IAS

MG rolle r

DV BIAS

Toner

Carrier

Devel opi ng bia s v olt age

-200V

(4) DV harness

The toner density sensor, the developing bias, harness. (For details, refer to [6] DISASSEMBLY AND ASSEMBL Y.)

(View ed fr om th e rear of devel oi ng uni t )

3 5

No. Name

Magnet roller Forms a magnetic brush of carrier

Developing doctor blade Limits the height of the magnetic

Developing MIX roller Stirs carrier in the developing unit

Toner transport roller Transport toner sent from the

Toner density sensor Senses toner density in

by magnetic force.

brush.

and distributes toner evenly.

toner hopper unit to the stirring section.

developer.

DV har ness c onnec t or

5 – 2

3) Basic operations

(Cassette paper feed)

When the CPFC (cassette paper feed clutch) is turned on, the paper feed roller shaft, the paper feed roller, and the take-up roller rotates in the dire ction of A, an d the r oller re lease arm is moved downwa rd by the limiter spring. As a result, the take-up roller falls by its weight to reach the paper surface, feeding the paper. When the CPFC is turned off, the take-up roller is pushed up to the position by the roller release arm spring.

3. Optical section

Stirring roll er

MG roller

Transport roller(upper)

Transport roller(lower)

DV drive unit

PS roller

Multi manual insertion paper feed unit (Option)

Paper fe ed unit

Proccess unit

Paper feed rive unit

Main drive unit

Cleaner unit

Transport unit

Main motor

Fuser unit

Paper ex it roller

1) General description

• The optical section of this model is composed of the fixed focus

lens and six mirrors. Since the fixed focus lens is used, No. 4/5 mirror base is shifted according to the shift of the lens to change the distance between the original and the drum (OID, Original Image Distance) in reduction or enlargement copy. The lens and No. 4/5 mirror unit are shifted by driving the stepping motor with the signals from the main control PWB, allowing zooming of 151 steps in 1% increment in the range of 0.50 to 2.00.

5 6 910

• Exposure is adjusted by changing the copy lamp voltage. The AE

sensor is provided in the zoom base to sense the density of the original. The copy lamp light is reflected by the original to the AE sensor, which senses the density of the original and adjust the copy lamp light quantity according to the density.

• The exposure system is the slit exposure system by moving light

source.

151 2

14 8 12

711 1316 4

Copy lamp

No. 2 mirror

No. 4 mirror

No. 2/3 mirror base unit

Mirror motor

Mirror home position sensor

Reflector

No. 3 mirror

No. 5 mirror

Copy lamp unit

Lens/No. 4/5 mirror base drive motor

Automatic exposure (AE) sensor/

Optical system dirt sensor

5 – 3

No. 1 mirror

Lens

No. 6 mirror

No. 4/5 mirror base unit

Lens home position sensor

(1) Original table

The original table is fixed. The original is set in the left center position.

Mirror base sc an spe ed is chang ed f o r zoomi ng

Enlargment

(2) Copy lamp

200V series: 170V , 310W

(3) Mirror

This model uses six mirrors. No. 1 mirror is attached to the copy lamp unit, No. 2/3 mirrors are attached to No. 2/3 mirror base, No. 4/5 mirrors are attached to No. 4/5 mirror base. The copy lamp unit and th e No. 2/3 mir ror base unit are scanne d in copying. The No. 4/5 mirror base is shifted in zoom copying to change the dist ance between ten original and the drum.

(4) Lens (fixed focus lens)

• Construction (1 group 3 lenses)

• Brightness (F8.5)

• Focus: (195mm ±1%)

(5) Lens home position sensor (LHPS)

This sens or sen ses the le ns home position . The out put sign al of thi s sensor is the basic signal to control the copy magnification ratio.

(6) Lens base

The lens is mounted to the lens base, which is shifted toward the paper feed direction in reduction copy or toward the paper exit direction in enlargement copy by the lens drive motor.

Copy direction

Normal

Zooming b y c hangi ng th e le ns and mirror positi on

Original

Reduct i o n

5 – 4

Parts identification and functions

Mirror home position sensor

No. 2/3 mirror unit

Copy lamp unit

Lens drive wire

Reflector

Copy lamp

Lens home position sensor

AE sensor

Lens No. 4/5 mirror unit drive motor N

Mirror motor

No. 4/5 mirror unit

Lens

Lens unit

Mirror base wire Temperature fuse

(7) Lens drive shaft

This shaft controls the optical axis of the lens in zoom copy. The lens follows along the slide base shaft.

(8) Lens drive wire

This is to shift the lens unit and the No. 4/5 mirror base.

(9) No. 4/5 mirror unit

No. 4/ 5 mirro rs a re a ttach ed t o this unit. It is shif ted by the le ns driv e motor to change the distance between the original and the drum according to the zooming ratio.

(10) Mirror m otor

This st epping motor shifts the co py lamp unit and the No. 2 /3 mir ror base. It is rotated at the rpm according to each zooming ratio.

(11) M irror home position sensor (MHPS)

This sensor senses the home position of the copy lamp unit. It is of light t r ansmission type.

(12) No. 2/3 mirror unit

No. 2/3 mirrors are attached to th is unit. It is scann ed by the mirror motor.

(13) Copy lamp unit

This is composed of No. 1 mirror, the temperature fuse, the copy lamp, the exposure adjustment plate, and the reflector, and scanned by the mirror motor.

(14) Temperature fuse

This is attached closely to the reflector to prevent against abnormal temperature rise in th e optic al syste m. If the temperatur e rise s abn ormally, it turns off the copy lamp power directly. 100V s eries (117°C) 200V s eries (117°C)

(15) Reflector

Light from the copy lamp is reflected by the reflector to the original.

(16) Exposure adj ustment plate

Four exp osure adjust ment plat es are attac hed to the copy lamp unit to adjust expos ure balance in back and forth direction of the f rame.

(17) Mirror base drive wire

This wire transmits the m irror motor p ower to th e copy lamp unit and the No. 2/3 mirror base to scan the mirror base.

(18) Lens drive m ot or

This stepping motor drives the lens and the No. 4/5 mirror base.

(19) AE sensor

This AE sensor senses the original density by the light emitted from the copy l am p a nd r ef lec te d by the origina l, controllin g t he de ve loping bias. The photometric area is about 100m width at the center and in the mirr or base scanning dir e ction. The element is photo diodes.

5 – 5

2) Basic operations

(Positions of the o riginal, the lens, and the image in each magnification ratio)

Normal: The distance between the original set on the table glass and

the lens is equal to the distance between the lens and the drum, resulting in the equal size of the original and the image.

Enlargement: Compared to the normal copy, the lens is nearer to the

original and the distance between the original and the lens is shorter. The distance between the No. 4/5 mirror unit and the lens is greater, and the distance between the lens and the drum is also greater. The distance between the original and the exposure surface of the drum is greater than that in the normal copy.

Mirror base scan speed

Lens and mirror positions are changed to adjust the

Copy paper

magnif ic ati o n ra t io

feed derection

Mirror scan speed is cahnged to adjust the magnification ratio

Mirror scan sp eed Drum rotation speed <Mirror scan speed

Enlargement

Original

Reduction

Reduction: Compared to the normal copy, the lens is nearer to the

drum, and the distance between the original surface and the lens is longer. The distance between the lens and the exposure surface of the drum is shorter. The distance between the No. 4/5 mirror unit and the lens is greater. The distance between the original and the exposure surface of the drum is greater than that in the normal copy.

(Copy lamp control in each copy density)

[MAX. 83V(166V) ] 80 70

CLV

(Copy lamp application voltage)

Execute Sim 46-01 to de termine the copy lamp applicatio n voltage (CLV) in EX1 and EX5. Then divide the difference between the voltages of EX1.0 and EX5.0 into nine. The application vol tage of the copy lamp in each expo sure level is determined by varying the ON timer duty of the copy lamp ON control signal.

(V)

60 50 40

EX1

[MIN. 45V(90V)]

EX5

• Photo density copy mode

Make the same control procedures as the manual density copy mode. The image density is controlled by lowering the grid bias voltage of the charging charger. To maintain the reproduction quality in half tone, the ON time duty of the copy lamp ON signal is made shorter than in the manual density copy mode. (The application voltage is lower.)

5 – 6

(Optical system dirt correction)

This mo del pe rform dirt correc tion by cha nging t he cop y lamp intensity a ccord ing t o the d irt degr ee in th e optic al s ystem (t he co py la mp unit, No. 1 mirror, No.2 mirror, No.3 mirror) to prevent against remarkable de grading of copy quality. The reference value is the AE sensor output value which is obtained when th e reference plate is e xposed with th e copy lamp voltage of

67.0V (134.0V) at power ON. This value is checked with sim 44-08, 09.

CLV

Sim46

Reference plate (Glass holder)

CPU

Reference value

>Measured value

Correction data output

Table glass

Copy lamp light quantity "UP"

Automatic exposu re sensor

100 200 300 400 79.8K 80K

CLV + (0.7)

(1) Setting the reference value for optical system correction.

Reference plate (Glass holder)

CPU reference value setting

1 Clean the optical system at every maintenance. 2 Perform Simulation 46-1.

(The previous data are cleared.)

3 After completion of Simulation 46-1, when performing the first

mirror initialization, measure light quantity of the copy lamp. Obtain the average value from the four measurement values and use the average value as the reference value for correction.

800ms

Table glass

Automatic exposu re sensor

1234

(2) Dirt corr ection

Reference plate (Glass holder)

CPU

Referenc e v a lue

>Measured value

Correction data output

1 Measure light quantity when performing mirror initialization. 2 Store the correction data into memory. 3 Reset the register inside the CPU.

Table glass

Copy lamp light quantity "UP"

Automatic exposu re sensor

Light quan t i t y measurement

Obtain the average value of four AE sensor values, and store it.

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4. Copy process

This model basic process and structure

• The Scorotron method is used to evenly charge the photoconduc-

tor surface to the given potential in the charge process. The corona wire regularly used is now replaced with a new corona charge mechanism that employs the 0.1mm thick stainless steel saw teeth plate, in order to suppress ozone generated when the oxide molecule in air is ionized.

• Considering the service efficiency, the process separation

mechanism is adopted.

• To prevent high voltage leakage by the loose corona charge unit, a

one-touch stopper mechanism is adopted.

Stirring roll er

MG roller

Transport roller(upper)

Transport roller(lower)

DV drive unit

PS roller

Multi manual insertion paper feed unit (Option)

Paper fe ed unit

Proccess unit

Paper feed rive unit

Main drive unit

Cleaner unit

Transport unit

Main motor

Fuser unit

Paper exit roller

1) Photoconductor

• This model uses OPC (organic photoconductor) as photoconduc-

tive material. (φ50 mm)

OPC la ye r CTL (Ele ctr ic char g e moving layer)

CGL (Electric charge generating layer) Aluminum layer

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