SHARP sf2120smE Service Manual

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SERVICE MANUAL

CODE: 00ZSF2120SM/E

MODEL SF-2020

MODEL SF-2120

SF-2020

Option • Paper tray (SF-UB15)

• Two-step paper feed unit (SF-CM15)

• One-step paper feed unit (SF-CM16)

• Personal counter (SF-71A/71B)

• 10-bin sorter (SF-S17) @

• 10-bin staple sorter (SF-S54) @

• Auto document feeder (SF-A18) @

• Reverse automatic document feeder

(SF-A57) @

SF-2120

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

@ For the options, refer to their service manuals.

[ 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

4. Optional specifications . . . . . . . . . . . . . . . . . . . 2-5

(1) Automatic document feed er (ADF) . . . . . . 2-5

(2) Reverse automatic do cum ent feeder

(RADF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

(3) 10-bin sorter . . . . . . . . . . . . . . . . . . . . . . . 2-5

(4) 10-bin staple sorter (10-bin SS) . . . . . . . . 2-6

(5) Two-step paper feed unit . . . . . . . . . . . . . 2-6

(6) 1-step paper feed unit . . . . . . . . . . . . . . . . 2-6

(7) Exclusive-use desk . . . . . . . . . . . . . . . . . . 2-6

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

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

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

3. Clutches, solenoids, and motors (Explaine d

with the SF-2120 and the SF-CM15) . . . . . . . . 3-4

4. PWB (Explained with the SF-2120 and the

SF-CM15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

5. Sensors and switches (Explained with the

SF-2120 and the SF-CM15) . . . . . . . . . . . . . . . 3-6

6. Rollers, mirrors, etc. . . . . . . . . . . . . . . . . . . . . . 3-7

[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

11. Optional two-step paper feed unit

(SF-CM15) installation . . . . . . . . . . . . . . . . . . . 4-8

12. Optional one-step paper feed unit

(SF-CM16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

13. Tray paper size selection . . . . . . . . . . . . . . . . 4-11

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

(1) Paper feed section . . . . . . . . . . . . . . . . . . . . . . 5-1

1) Gener al descri pti ons . . . . . . . . . . . . . . . . . 5-1

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

(2) Developing section . . . . . . . . . . . . . . . . . . . . . . 5-2

1) Gener al descri pti ons . . . . . . . . . . . . . . . . . 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 formin g process . . . . . . 5-10

(4) Transition of ph ot oconductor surf ace

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

(5) Photoconductor drum sensitivit y

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

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

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

1) Gener al . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

2) Basic com position and functi ons . . . . . . 5-16

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

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

1) Gener al . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

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

(8) ADU unit (SF-2120 only) . . . . . . . . . . . . . . . . . 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

1-6. Lower paper feed unit . . . . . . . . . . . . . . . . 6-3

1-7. Lower separation roller . . . . . . . . . . . . . . . 6-3

1-8. Transport roller . . . . . . . . . . . . . . . . . . . . . 6-3

1-9. Lower paper feed roller/take-up roller . . . 6-3

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

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

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

3. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

3-1. Fusing unit removal . . . . . . . . . . . . . . . . . . 6-5

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

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

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

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

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

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

4. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

1) Copy lam p re pl acement . . . . . . . . . . . . . . 6-7

2) Mirror base wire rep lacement and

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

3) No. 2/ 3 m i rr or unit (mirror base B)

installation (Mirror base B positioning) . . 6-10

4) Cop y la m p uni t ins tallation

(Mirror base A positioning) . . . . . . . . . . . 6-11

5) No. 4/ 5 m i rr or unit (mirror base C)

replacement . . . . . . . . . . . . . . . . . . . . . . 6-11

6) Lens wire replacement . . . . . . . . . . . . . . 6-13

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

5. High voltage section . . . . . . . . . . . . . . . . . . . . 6-16

5-1. Main charger (MC) unit . . . . . . . . . . . . . . 6-16

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

unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

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

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

6-2. Waste toner bottle replacement

(required when waste toner full detection/

maintenance) . . . . . . . . . . . . . . . . . . . . . 6-18

6-3. Drum (Replace every 50K copies) . . . . . 6-19

6-4. Blank lamp unit

(Clean every 50K copies.) . . . . . . . . . . . 6-19

6-5. Discharge lamp unit

(Clean every 50K copies.) . . . . . . . . . . . 6-19

6-6. Cleaner blade

(Replace every 50K copies.) . . . . . . . . . . 6-20

6-7. Drum separation pawl

(Replace every 50K copies.) . . . . . . . . . . 6-20

6-8. Process control PWB (Clean the sensor

section every 50K copies.) . . . . . . . . . . . 6-20

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

section every 50K copies.) . . . . . . . . . . . 6-20

6-10. Toner reception seal (Replace every 50K

copies.) . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

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.) . . . . . . . . 6-21

C. V ring attachment . . . . . . . . . . . . . . . . . . 6-21

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

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

G . Developing unit color i dentification . . . . . 6-22

8. Operation panel/interm ediate cabinet . . . . . . . 6-22

9. Frame major parts . . . . . . . . . . . . . . . . . . . . . . 6-22

9-1. Cooling fan motor replacement . . . . . . . 6-22

9-2. Power unit . . . . . . . . . . . . . . . . . . . . . . . . 6-23

9-3. Tray size detecting PWB . . . . . . . . . . . . 6-23

9-4. Main PWB unit . . . . . . . . . . . . . . . . . . . . 6-24

9-5. AC power PWB . . . . . . . . . . . . . . . . . . . . 6-24

9-6. Ozone filter (Check every 50K copies,

and clean every 100K copies.) . . . . . . . . 6-24

10. Multi paper feed unit (SF-MF15: option) . . . . . 6-25

10-1. Separation roller . . . . . . . . . . . . . . . . . . . 6-25

10-2. Take-up roller/paper feed roller . . . . . . . 6-25

11. ADU (SF-2120 only) . . . . . . . . . . . . . . . . . . . . 6-26

12. Paper feed unit

(SF-CM15, SF-CM16, option) . . . . . . . . . . . . . 6-27

[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 le ns val ues 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. Original detecting section . . . . . . . . . . . . 7-15

A. Original detecti ng ar m unit adjustmen t . . 7-15

B. Original detecting l evel adjustment . . . . 7-16

2-5. Copy density adjustment . . . . . . . . . . . . 7-17

2-6. Process section adjustment . . . . . . . . . . 7-21

[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 . . . . . . . . . . . . . . . . . . . . 8-4

6. User simulation . . . . . . . . . . . . . . . . . . . . . . . . 8-20

(1) Functions which can be set and

canceled by the user simulation . . . . . . . 8-20

(2) User simulation . . . . . . . . . . . . . . . . . . . 8-21

(3) User simulation code table . . . . . . . . . . . 8-21

(4) Department counter set ting content

(Set with user program P10 ∼ P15) . . . . 8-21

[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

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

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

[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) I/O (IC8) CXD1095Q . . . . . . . . . . . . . . . . 12-8

(4) Detector circuit of sensor signal . . . . . . 12-11

(5) Start/stop control circuit . . . . . . . . . . . . 12-11

(6) Heater lamp control circuit . . . . . . . . . . 12-12

(7) Driver circuit (Solenoid, electromagnetic

clutch) . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13

(8) Stepping motor drive circuit . . . . . . . . . 12-13

(9) AE (Auto Exposure) sensor circuit . . . . 12-14

(10) Toner supply motor drive circuit . . . . . . 12-14

(11) Reset IC (IC13) . . . . . . . . . . . . . . . . . . . 12-14

(12) Operation panel . . . . . . . . . . . . . . . . . . 12-15

(13) EnergyStar circuit description . . . . . . . . 12-16

(14) ADU circuit description . . . . . . . . . . . . . 12-17

[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)

10-bin sorter SF-S 17

10-bin staple sorter SF-S54

(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 (SF-

2020) or 5.8 sec (SF-2120).

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

Reversing automatic document feeder SF-A57

(SF- 2120 o n l y)

Two-step paper feed unit SF-CM15

One-step paper feed unit SF-CM16

1 – 1

Personal counter

Automatic document feeder SF-A18

Tray (r e serve) SF-UB 15

Exclusive-use desk

SF-D S17 SF-D S18

[2] PRODUCT SPECIFICATIONS

1. Basic specifications

(1) Type: Table top (2) Copy speed: <SF-2020/2120>

Normal

A3 11 sheets/min 10 sheets/min

B4 13 sheets/min 12 sheets/min 12 sheets/min A4 (Portrait) 20 sheets/min 15 sheets/min 15 sheets/min A4 (Landscape) 15 sheets/min 14 sheets/min 14 sheets/min B5 (Portrait) 20 sheets/min 15 sheets/min 15 sheets/min B5 (Landscape) 15 sheets/min 14 sheets/min 14 sheets/min W letter 11 sheets/min 10 sheets/min 10 sheets/min Legal 13 sheets/min 12 sheets/min 12 sheets/min Letter (Portrait) 20 sheets/min 15 sheets/min 15 sheets/min Letter (Landscape) 15 sheets/min 14 sheets/min 14 sheets/min

(Note) The copy speeds for enlargement and reduction are the lowest

ones. (3) Warm up time: 45 sec or less (4) First copy time: SF-2020

First copy time from each paper feed port (A4 landscape)

Paper feed port SF-2020 Paper feed port SF-2120 Body tray upper stage 5.3 sec ADU 5.8 sec Body tray lower stage 5.8 sec Body 1st step

Option paper feed unit first step

Option paper feed unit second step

(5) Jam recovery time: 8 sec (Conditions: After leaving the door

(6) Multi copy Max. 99 sheets (7) Original

Max. original size A3/W letter Reference original size Left side/Center Original sensing YES (Japan only) Sensing size A3 ∼ B5R

(8) Copy magnification ratio

Fixed magnification: 200, 141, 122, 115, 100, 86, 81, 70, 50% (9

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

5.3 sec (Paper feed port: Upper tray) SF-2120

5.8 sec (Paper feed port – from copier paper tray)

6.1 sec

6.4 sec

open for 60 sec, the standard conditions)

steps)

Enlargement

(Magnification)

(200%)

Option paper feed unit 1st step

Option paper feed unit 2nd step

SF-2020 SF-2120

Reduction

(Magnification) 10 sheets/min

(50%)

from copier paper tray

6.5 sec

6.8 sec

(11) Paper exit/finishing

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

(12) Additional functions

Function

SF-2020 SF-2120

Auto Paper Selection

Auto Magnification ratio Selection

Shift F 1-set 2-copy F Enlargement is impossible. Edge erase F Trimming × Masking × Centering × Move image × Covers/inserts × Overlay × Job memory × Monochrome F (Red, Blue)

(13) External dimensions

W x D x H mm 600 × 585 × 460 600 × 585 × 510 Occupying area

(W x D) Weight 43.5Kg 49.5Kg

(14) Power source

Voltage: 100V 50/60Hz Frequency: 50/60Hz common

(15) Power consumption

Max. power consumption

Stand-by power consumption

Average power consumption during operation

Preheating 60W Auto power shut

off

SF-2020 SF-2120

850 × 595 900 × 595

1.5kw (Note) Max. when the

18W (Heater lamp OFF) 20% greater for H version 1kW (Heater lamp ON)

1320W

4.8W

8 × 13: only the specified area, original size input

Remark

option is installed

2 – 1

2. Description of each section

(1) Paper feed section

SF-2020 SF-2120 Copying size A3 ∼ A6/W letter ∼ Invoice Paper feed

system Paper feed

capacity

Cassette Paper size Paper weight Paper kind Remark

AB series:

Body tray upper stage

A3 ∼ A5 Inch series:

W letter ∼ Invoice

AB series:

Body tray lower stage

A3 ∼ A5 Inch series:

W letter ∼ Invoice

AB series:

Paper feed unit (option)

A3 ∼ A5 Inch series:

W letter ∼ Invoice

AB series: A3 ∼ A6R

Multi

Inch series: W letter ∼

Multi

Invoice manual paper feed

Single

AB series:

A3 ∼ A6R

Inch series:

W letter ∼

Invoice

2 trays + multi manual feed

1 tray + multi manual feed

250 sheets × 2250 sheets × 1

56 ∼ 80g/m

Standard paper,

15 ∼ 20 lbs

56 ∼ 80g/m

recycled paper

Standard paper,

15 ∼ 20 lbs

56 ∼ 80g/m

recycled paper

Standard paper,

15 ∼ 20 lbs

recycled paper

56 ∼ 80g/m2Standard

paper,

15 ∼ 20 lbs

specified paper, special

paper, OHP film, Second original

52 ∼ 128g/m

paper,

14 ∼ 34 lbs

postcards (without folding)

SF-2120: copier paper feed tray

SF-CM15 (2-step) SF-CM16 (1-step)

(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

(6) ADU section

Paper kind Normal paper, 56g/m2 ∼ 80g/m

Capacity 50 sheets Paper size B4, A4, B5 Copy void width Lead edge, 3mm or less

Rear edge, 3mm or less

(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

2 – 2

3. Supply parts

U.S.A., Canada

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 Black developer (530g) x 10 50K x 10 SF-216MD1 3 Color developer Red Color developer (550g) x 10 10K x 10 SF-780MD2

Blue SF-780MD3 4 Black toner Black Black toner cartridge (210g) x 10 5K x 10 SF-216MT1 5 Color toner Red Color toner cartridge (210g) x 10 5K x 10 SF-216MT2

Blue SF-216MT3 6 Color developing unit

kit

7 Upper heat roller kit Upper heat roller x 1

8 Lower heat roller kit Lower heat roller x 1

9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

Red Developing unit x 1

Blue SF-216NK3

Color developer (550g) x 1 Color toner cartridge (210g) x 1 Storage case x 1

Upper fusing separation pawl x 4 Fusing bearing (F) x 1

Lower fusing separation pawl x 2

Europe/U.K.

Name Content Life Product name

1 Photoconductor kit Photoconductor drum x 1

2 Black developer Black Black developer (530g) x 10 50K x 10 SF-216LD1 3 Color developer Red Color developer (550g) x 1 10K SF-780DV2

Blue SF-780DV3 4 Black toner Black Black toner cartridge (210g) x 10 5K x 10 SF-216LT1 5 Color toner Red Color toner cartridge (210g) x 1 5K SF-216T2

Blue SF-216T3 6 Color developing unit

kit

7 Upper heat roller kit Upper heat roller x 1

8 Lower heat roller kit Lower heat roller x 1

9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

Red Developing unit x 1

Blue SF-216K3

Cleaner blade x 1 Drum separation pawl x 2

Color developer (550g) x 1 Color toner cartridge (210g) x 1 Storage case x 1

Upper fusing separation pawl x 4 Fusing bearing (F) x 1

Lower fusing separation pawl x 2

50K SF-216DR

SF-216NK2

100K SF-216UH

50K SF-216LH

50K SF-216DM

SF-216K2

100K SF-216UH

50K SF-216LH

Australia/New Zealand

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 Black developer (530g) x 10 50K x 10 SF-216LD1 3 Color developer Red Color developer (550g) x 10 10K x 10 SF-780LD2

Blue SF-780LD3 4 Black toner Black Black toner cartridge (210g) x 10 5K x 10 SF-216LT1 5 Color toner Red Color toner cartridge (210g) x 10 5K x 10 SF-216LT2

Blue SF-216LT3 6 Color developing unit

kit

7 Upper heat roller kit Upper heat roller x 1

8 Lower heat roller kit Lower heat roller x 1

9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

Red Developing unit x 1

Blue SF-216K3

Color developer (550g) x 1 Color toner cartridge (210g) x 1 Storage case x 1

Upper fusing separation pawl x 4 Fusing bearing (F) x 1

Lower fusing separation pawl x 2

2 – 3

50K SF-216DM

SF-216K2

100K SF-216UH

50K SF-216LH

Middle and South America/Asia

Name Content Life Product name

1 Photoconductor kit Photoconductor drum x 1

2 Black developer Black Black developer (530g) x 10 50K x 10 SF-216CD1 3 Color developer Red Color developer (550g) x 10 10K x 10 SF-780LD2

Blue SF-780LD3 4 Black toner Black Black toner cartridge (210g) x 10 5K x 10 SF-216CT1 5 Color toner Red Color toner cartridge (210g) x 10 5K x 10 SF-216CT2

Blue SF-216CT3 6 Color developing unit

kit

7 Upper heat roller kit Upper heat roller x 1

8 Lower heat roller kit Lower heat roller x 1

9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

Red Developing unit x 1

Blue SF-216SK3

Cleaner blade x 1 Drum separation pawl x 2

Color developer (550g) x 1 Color toner cartridge (210g) x 1 Storage case x 1

Upper fusing separation pawl x 4 Fusing bearing (F) x 1

Lower fusing separation pawl x 2

50K SF-216DR

SF-216SK2

100K SF-216UH

50K SF-216LH

Middle East/Africa (excluding Russia)

Name Content Life Product name

1 Photoconductor kit Photoconductor drum x 1

Cleaner bladex 1

Drum separation pawl x 2 2 Black developer Black Black developer x 10 50K x 10 SF-216LD1 3 Black toner Black Black toner bottle (250g) x 10 6K x 10 SF-116LT 4 Upper heat roller kit Upper heat roller x 1

Upper fusing separation pawl x 4

Fusing bearing (F) x 1 5 Lower heat roller kit Lower heat roller x 1

Lower fusing separation pawl x 2 9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

50K SF-216DM

100K SF-216UH

50K SF-216LH

Asia (Excluding Taiwan(AURORA)/Hong Kong (SRH))

Name Content Life Product name

1 Photoconductor kit Photoconductor drum x 1

Cleaner bladex 1

Drum separation pawl x 2 2 Black developer Black Black developer x 10 50K x 10 SF-216CD1 3 Black toner Black Black toner bottle (250g) x 10 6K x 10 SF-116CT 4 Upper heat roller kit Upper heat roller x 1

Lower heat roller kit Lower heat roller x 1

5 9 Staple cartridge — Staple cartridge (SF-SC12) x 3 5000 times x 3 SF-LS12

Upper fusing separation pawl x 4

Fusing bearing (F) x 1

Lower fusing separation pawl x 2

50K SF-216DR

100K SF-216UH

50K

SF-216LH

2 – 4

4. Optional specifications

(1) Automatic document feeder (ADF)

Functions

Original detection on the tray

Available (For originals of indefinite sizes, scanning is made.)

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 ∼ A5/11" x 17" ∼ 8 1/2" x 5 1/2" Original change speed

(S → S) Original weight 35 ∼ 128g/m

Original set quantity 50 sheets, 35 ~ 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

20 sheets/min

(50 ∼ 128g/m2 for EX)

80 ~ 128 g/m2 thickness max. 6.5 mm

(Height: excluding the tray)

Functions

Original sensing on the tray

Sensing size Inch series: 11" x 17", 8 1/2" x 14", 8 1/2" x

Original mixture Allowed (However, no linkage with the AMS) Original reverse NO

YES (Scanning read for uncertain size originals.)

11", 8 1/2" x 11"R, 8 1/2" x 5 1/2" AB series: A3, B4, A4, A4R, A5

(2) Reverse automatic document feeder (RADF) <Model name: SF-A57>

Original set direction Face up Original set position Center reference Original transport system Belt system Original feed sequence Bottom taking (Face up exit) Original size A3 ∼ A5, 11" × 17" ∼ 8 1/2" × 5 1/2" Original replacement

speed (S → S) Original weight 35 ∼ 128g/m2 (50 ∼ 128g/m2 for EX) Original set capacity 50 sheets, 35 ∼ 80g/m

Original stop system Position control Dimensions 592 (W) × 521 (D) × 110 (H) mm

Weight About 12.5kg Power source Supplied from the copier (equipped

Power consumption 73W

20 sheets/min

80 ∼ 128g /m2: thickness Max. 6.5mm

(Height; excluding the tray)

with the power source).

Detection size Japan: A3, B4, A4, A4R, B6, B6R

Original mixture Allowed (However, no linkage with the

Original reverse Allowed

Inch series: 11" × 17", 8 1/2" × 14", 8 1/2" × 11", 8 1/2" × 11"R, 8 1/2" × 5 1/2" EX AB series: A3, B4, A4, A4R, A5

AMS)

Display section

1 Original feed display The ADF shows the operation

allowable state. When an original is set, the display lights up.

2 Original remaining

display

SDF mode Selection between the SDF mode and

When the automatic document feeder is used as the original cover, the LED lights up simultaneously when the last exposure is completed. When the transport cover is opened, the LED goes off.

the ADF mode is possible. (Selected by the user program.)

(3) 10-bin sorter <Model name: SF-S17N>

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 (L4/letter size), 100

sheets for the top bin only.

Sorting 30 sheets (A4/letter)

15 sheets (B4/legal) 15 sheets (A3/W letter)

Grouping 20 sheets (A4/letter)

15 sheets (B4/legal) 15 sheets (A3/W letter)

Paper size (Non-sort) A3 ∼ A6 (Postcard)R/11" x 17" ∼

8 1/2" x 5 1/2"

(Sort/group) A3 ∼ A5/11" x 17" ∼ 8 1/2" x 11" Process capacity 20 sheets/min Paper transport Center reference Paper reception Face up Paper weight (Non-sort) 52 ∼ 128g/m2 (14 ∼ 34lbs)

(Sort/group) 56 ∼ 80g/m2 (15 ∼ 21lbs) Dimensions 335 (W) x 493 (D) x 298 (H)

(Width: Including the tray.) Weight 7kg Power source Supplied from the copier. DC24V (1.2A) Power consumption Max. 30W

2 – 5

(4) 10-bin staple sorter (10-bin SS)

(5) Two-step paper feed unit

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, 8 1/2" × 11", 80g/m2) 100 sheets for the top bin

Sort 30 sheets (A4, 8 1/2" × 11")

15 sheets (B4, 8 1/2" × 14", 8 1/2" × 13") 15 sheets (A3, 11" × 17") 80g/m

Grouping 20 sheets (A4, 8 1/2" × 11")

15 sheets (B4, 8 1/2" × 14") 15 sheets (A3, 11" × 17"), 80g/m

Staple sort 30 sheets (A4, 8 1/2" × 11")

15 SHEETS (B4, 8 1/2" × 14") 15 sheets (A3, 11" × 17") 80g/m

Paper size Non-sort A3 ∼ A6R

11" × 17" ∼ 8 1/2" × 5 1/2"

Sort/group/staple sort A3 ∼ A5

11" × 17" ∼ 8 1/2" × 5 1/2" Alignment (Sorting) Max. shift 2mm (Alignment operation) Process capacity 20 sheets/min 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

Staple section

Type Copier stapler Stapling time No. of stapled sheets 30 sheets (80g/m2) Binding reference Front reference

Paper size A3 ∼ A5 Paper feed capacity 250 sheets x 2 steps Paper weight 56 ∼ 80g/m2 (15 ∼ 21 lbs) Paper kind Standard paper, recycled paper Size selection Tray replacement/user handling Power source Supplied from the copier. Dimensions (W x D x H) 570 (W) x 570 (D) x 208mm (H) Weight About 14kg

(6) 1-step paper feed unit <SF-CM16>

Paper size A3 ∼ A5 Paper feed capacity 250 sheets × 1 step Paper weight 56 ∼ 80g/m2, 15 ∼ 21 lbs Paper kinds Standard paper, recycled paper Size selection Tray replacement, user operation Power source Supplied from the copier. Dimensions 570(W) × 570(D) × 103(H)mm Weight About 8.5kg

(7) Exclusive-use desk

1. SF-DS17 (Desk without 2-step paper feed unit SF-CM15)

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

Adjuster None Door None

2. SF-DS18 (Desk with two-step paper feed unit SF-GM15 installed)

Dimensions 570(W) × 550(D) × 350(H) Weight About 14.0kg Functions Caster Provided

Adjuster None Door None

Staple supply Cartridge (5,000 pcs.) Staple SF-SC12 No staple/no cartridge/no

stapler detection Staple jam detection Available Manual staple mode Available (excluding manual stapling)

Available

2 – 6

[3] PRODUCT VIEWS

1. External view and internal structure

17 18

14 16

Upper un i t

Lower unit

12 13

No. Name No. Name No. Name

1 Original stocker 2 Original cover 3 Original table 4 Paper exit tray 5 Grip 6 Manual feed unit 7 Manual feed original guide 8 Manual feed tray 9 Operation panel F Front cover G Power switch H Paper tray (SF-2020),

Duplex tray (SF-2120)

I Paper tray J Developing unit grip K Developing unit strap L Toner hopper M Developing unit lock lever N Release lever O Fusing unit P Drum

3 – 1

2. Operation panel

SF-2020

(AB series)

(Inch series)

SORTER

SORT

STAPLE SORT

GRO UP

1615

3 4

ORIGINAL

EXPOSURE

12345

LIGH T

DARK

2019

...

12345

1817

2019

PAPER

SIZE

A3 A4 A4 A5 B4

EXTRA

A3 A4 A4 A5 B4

EXTRA

5 2 1

TRAY SEL EC T AU T O I M A GE

4 5 2

AUTO %

PRESET RATIO

100%

252423

8 7 9 10 11

200% 141% 122% 115%

86% 81% 70%

50%

7 9 10 11

200% 141% 122% 115%

86% 81% 70% 50%

1 4

1 45 7

5 8

31 32

POWER SAVE

13 14

AUDIT CLEAR

13 14

ACC.#-C

SORTER

SORT

GROUP

1615

EXTRA

3 4

x x

TRAY SELECT

2 1

EXPOSU RE

AUTO MANUAL PHOTO

12345

LIGHT DARK

1817

2019

PRESET RATIO

100%

AUTO IMAGE

2423

2221

7 9

200% 141% 129% 121%

95% 77% 64% 50%

10 11

POWER SAVE AUDIT CLEAR

13 14

No. Name No. Name No. Name

1 1-set 2-copy key/Display lamp 2 Density selection key/Display lamp 3 Paper jam lamp 4 Paper supply lamp 5 Tray position/Paper jam position lamp 6 Magnification ration lamp 7 Maintenance lamp 8 Copy quantity display 9 Mini maintenance lamp F Toner supply lamp G 10-key pad H Pre-heat lamp I Department count end key J All clear key K Clip tray L Sorter key/Display lamp M Binding margin key/display lamp N Edge erase key/Edge erase lamp O Density adjustment key/Display lamp P Original size display lamp Q Paper size display lamp R Tray selection key S Paper auto selection display lamp T Auto magnification ratio selection

key/Display lamp

U Magnification ratio selection key V Zoom lamp W % key X Zoom key Y Interruption key/Display lamp Z Zero-Read-out key [ Erase key \ PRINT button

3 – 2

SF-2120

(AB series)

(Inch series)

SORTER

SORT

STAPLE SORT

GROUP

1615

ORIG INAL TO COPY

2 1

ORIG INAL

EXPOSURE

SIZE

AUTO MANUAL PHOTO

12345

LIGH T DA RK

1817

2019

A3 A4 A4 A5 B4

EXTRA

PAPER SIZE

3 4

...

... ...

...

... ...

...

AUTO

12345

1817

A4 A5 B4

EXTRA

2019

TRAY SELECT AUTO IMAGE

2423

2221

5 2 1

AUTO %

2221

PRESET RATIO

100%

252423

8 7 9 10 11

200% 141% 122% 115%

86%

200% 141% 122% 115%

81% 70% 50%

86% 81% 70% 50%

INTER RUPT

ZOOM

7 9 10 11

ZOOM

30 31 32

2 5

31 32

POWER SAVE AUDIT CLEAR

ACC.#-C

13 14

SORTER

SORT

STAPLE SORT

GROUP

3 4

5 2 1

ORIG INAL

EXPOSURE

AUTO MANUAL PHOTO

12345

LIGHT DARK

1615

1817

2019

PAPER

SIZE

EXTRA

TRAY SELECT AUTO IMAGE

2221

PRESET RATIO

100%

252423

8 7 9 10 11

200% 141% 129% 121%

95% 77% 64% 50%

ZOOM

INTER RUPT

29 30

4 7

5 89

31 32

POWER SAVE AUDIT CLEAR

No. Name No. Name No. Name

key/Display lamp

U Magnification ratio selection key V Zoom lamp W % key X Zoom key Y Interruption key/Display lamp Z Zero-Read-out key [ Erase key \ PRINT button ] Duplex key/Display lamp (SF-2120 only)

3 – 3

3. Clutches, solenoids, and motors (Explained with the SF-2120 and the SF-CM15)

Clutches and solenoids

13 25 26

22 23 24 15

3 8

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 (Paper is fed from the ADU in the SF-2120) For paper feed roller rotation 5 CPFC2 Tray paper feed clutch For paper feed roller rotation 6 CPFC3 Option tray paper feed clutch (SF-CM15, SF-CM16) For paper feed roller rotation 7 CPFC4 Option tray paper feed clutch (SF-CM15 only) For paper feed roller rotation 8 MPFS Manual paper feed solenoid For pressing take-up roller 9 GS Gate solenoid (SF-2120 only) For selection of the gate U DPFC Take-up roller clutch (SF-2120 only) For ADU take-up roller rotation V DRRC Transport roller clutch (SF-2120 only) For ADU transport roller rotation

Motors

No. Signal name Name Functions, operations Type

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

down the machine, and remove ozone.

G MM Main motor Used to drive the body. DC brush H CFM Optical system cooling fan Used to cool and ventilate the optical system. DC brushless I LM Lens motor Used to move the optical lens. DC stepping J TM Toner motor Used to stir toner. DC synchronous K MRM Mirror motor Used to move the mirror base. DC stepping L CS2M Paper feed motor (SF-CM15, CM16) Used to drive the paper feed roller. DC brush M CS3M Option paper feed motor Used to drive the option paper feed roller. DC brush N CS4M Option paper feed motor (SF-CM15 only) Used to drive the option paper feed roller. DC brush O SMF Suction fan motor Used to ventilate the suction section. DC brushless P VFM2 Exhaust fan motor Used to ventilate the fusing section, cool the machine,

and exhaust ozone.

Q DFM Duplex copy fan motor (SF-2120 only) Used to ventilate and cool the ADU section. DC brushless R DDM ADU motor (SF-2120 only) Used to drive the ADU section DC brush S PAM1 Matching motor (SF-2120 only) Used to drive the ADU matching disk Stepping T PAM2 Matching motor (SF-2120 only) Used to drive the ADU matching disk Stepping

3 – 4

DC brushless

4. PWB (Explained with the SF-2120 and the SF-CM15)

1 3 4 52 21

20 19

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 Paper feed power PWB

(SF-CM15)

I CSD B PWB Used to sense the cassette size of

K Tray module PWB Vertical transport of 2nd ∼ 4th

M ADU PWB ADU control N PID PWB Manual paper entry detection O PPD PWB Body PR roller JAM detection P High voltage PWB Process high voltage, developing

Q PDD PWB Body paper exit section JAM

S Sub DC power PWB Used to supply power in the power

Used to supply power to drive the paper feed unit.

2nd ∼ 4th tray.

cassette, JAM detection, paper feed clutch interface

detection, ventilation fan motor interface

save mode. (5V is supplied to the main PWB and the operation PWB.)

F DC circuit PWB DC power input

H Motor control PWB Used to drive and control the

J Motor sensor PWB Encoder for 2nd ∼ 4th paper feed

L DPPD PWB Vertical transport of 2nd ∼ 4th tray,

R Paper feed I/F PWB I/F of copier paper detection and

paper feed motor and the transport motor.

motor

JAM detection and cover open detection

bias voltage supply

the paper feed clutch.

3 – 5

5. Sensors and switches (Explained with the SF-2120 and the SF-CM15)

2 354 6

24 25 26 20 21 22

For the ADU sensor, refer to page 5-18.

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 1 CSD0 ∼ 2 Body upper tray paper size detection (SF-2020 only) Tact switch Shorted when the switch is turned on. I 2 CSD0 ∼ 2 Body lower tray paper size detection Tact switch Shorted when the switch is turned on. J 3 CSD0 ∼ 2 Option upper tr ay paper size det ection @1 Tact switch Shorted when the switch is turned on. K 4 CSD0 ∼ 2 Option lower tr ay paper size detection @2 Tact switch Shorted when the switch is turned on. L PED1 Body upper tray paper presence detection (SF-2020 only) Transmission photo sensor HIGH when paper is present. M PED2 Body lower tray paper presence detection Transmission photo sensor HIGH when paper is present. N PED3 Option upper tray paper presence detection @1 Transmission photo sensor HIGH when paper is present. O PED4 Option lower tray paper presence detection @2 Transmission photo sensor HIGH when paper is present. P Motor sensor 2 Body lower stage paper feed motor encoder sensor Transmission photo sensor Rotation pulse output Q Motor sensor 3 Option upper paper feed motor encoder sensor @1 Transmission photo sensor Rotation pulse output R Motor sensor 4 Option lower paper feed motor encoder sensor @2 Transmission photo sensor Rotation pulse output S DPPD1 Body upper tray paper transport sensor Transmission photo sensor LOW when paper is present. T DPPD2 Body lower tray paper transport sensor Transmission photo sensor LOW when the side door is open and

paper is present.

U DPPD3 Option upper tray paper transport sensor Transmission photo sensor LOW when the option door is open

and paper is present.

V DPPD4 Option lower tray paper transport sensor Transmission photo sensor LOW when the option door is open

and paper is present.

W PID Single manual feed paper entry sensor Transmission photo sensor HIGH when paper is present. X OCSW OC cover open/close sensor Transmission photo sensor OC cover open/close detection Y ORS Original size sensor Photo transistor Original size detection Z DMS Drum mark sensor Reflection sensor Drum mark detection [ IDS Toner patch density sensor Reflection sensor Toner patch density detection

@1: SF-CM15, SF-CM16 @2: SF-CM15 only

3 – 6

6. Rollers, mirrors, etc.

ADU

29 28

20 19 18 3 4 17 7 16 6 5 8 14

27 26 25 24 23 22 21

4142

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 ^ Developing magnet roller _ Tray paper feed roller ‘ Tray paper feed reverse roller a Tray paper feed take-up roller b PE actuator c Transport roller (lower) follower roller d Transport roller (lower) e Tray paper feed reverse roller f Tray paper feed roller g Tray paper feed take-up roller h Reverse roller i Paper feed roller j Take-up roller

@ Since \, ], _ ~ g are the s ame as in the SF-C M 15 (option), they are omitted.

3 – 7

[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

85 65

20% ∼ 85% RH 35°C for 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 fo llowing 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 to an unstable place.

Keep the machine in horizontal state to maintain the performances.

˚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

1 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.

Grounding termin al

7 Install near a power outlet.

(2) Space aroun d th e ma chine

Install the machine with its rear side about 10cm 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

1 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

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.

Mirror unit fixing screw

Paper feed tray

Electrode cleaner

Electrode section

4 – 3

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

screw.

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.

Fixing screw

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.

Developing unit lever

Installation toner Fixing tape

Front cabinet

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.

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

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

DV lever

Developing unit

Hand carry strap

Developing unit

Grip

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.

Developing unit

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

Developing unit lever

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

Grip

Front cabinet

6. Toner density sensor level adjustment

T urn on the copier power switch.

A. Developing unit level adjustment

1 Execute simulation 25.

Copy tray

8. Toner supply

1 Shake the toner cartridge right and left several times with the

toner cartridge sheet surface facing up.

Sheet section

Toner cartridge

2 Install the toner hopper of the developing unit, and slide it toward

you until it clicks. At that time, be careful to distribute toner evenly in the toner

cartridge.

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.

Toner cartridge

4 – 5

3 Hold the grip of the toner hopper shutter, and slowly pull out the

shutter fully toward you. If the shutter won’t move, the procedure in 2 may have not

performed properly. In that case, slide the toner cartridge again toward you until it clicks.

Shutter

Grip

4 While pressing the toner cartridge securely, strongly pull the toner

cartridge sheet toward you. This will supply toner into the toner hopper. The toner cartridge sheet must be removed completely.

Then tap the top of the toner cartridge several times to feed toner.

6 Slide the toner cartridge to the bottom and remove it slowly.

If the shutter have not been pushed completely in procedure (5), the toner cartridge cannot be slid. In that case, push the shutter completely and slide and remove the cartridge.

Toner cartridge

7 Hold the grip of the developing unit, and insert the developing unit

slowly to the bottom.

Developing unit

Toner cartridge

Sheet

5 Hold the grip of the toner hopper shutter and slowly push the

shutter completely to the bottom.

Shutter

Grip

8 Close the developing unit lever, and close the front cabinet.

Developing unit lever

Front cabinet

Grip

With the above procedures, toner supply is completed.

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.

Direct ion A

Direc ti on B

Section a

[Reference figure]

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-A15)

(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]

Paper center line

Image center line (First image)

(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

11. Optional two-step paper feed unit (SF-CM15) installation

Parts packed together

3 The following procedure must be performed by two persons.

Hold the grips of the copier, and insert the positioning bosses (2 positions) of the two-stage paper feed unit into the positioning holes (2 positions) on the bottom of the copier. Then put the four legs of the copier on the two-stage paper feed unit.

Grip

Connec tion adjustment plate x 1 pc.

Connection screw A x 2 pcs.

Connection screw B x 1 pc.

Connection screw C x 2 pcs.

Disconnect the power plug of the copier and perform the following procedures.

1 Remove two screws which are fixing the rear cabinet on the lower

stage of the copier, and remove the rear cabinet.

Rear cabinet

Fixin g scr ew

Positioning boss

4 While lifting the lower stage tray slightly, pull it out until it stops.

Then hold the both sides of the tray and lift and remove it.

5 Attach the connection adjustment plate as shown in the figure and

fix it with two screws A. Then fix the left side with screw B. Install the paper tray which was removed in procedure 4 to the copier.

Positioning boss

2 Remove the notched section of the lower stage of the copier.

Notched section

4 – 8

Connection screw B

Connection adjustment plate

Connection screw A

Connect the rear side of the copier with two connection screws C.

Connection screw C

12. Optional one-step paper feed unit (SF-CM16)

6 Remove the connecter which is fixed to the rear cabinet of the

two-stage paper feed unit with tape. Connect the 4P connector and 10P connector with the 4P connector and 16P connector of the copier.

4P connector

16P connector

4P connector

Fixing tape

7 Install the rear cabinet which was removed in procedure 1 to the

original postilion, and fix it with two screws.

Included parts

Securing fixture (1pc)

Mounting screws "A" (2pc)

Mounting screws "B" (1pcs)

Mounting screws "C" (2pcs)

Disconnect the plug to the main copier unit before performing the following procedures.

1. Removing th e rear cover to the main copi er unit’s

lower tray

Remove t h e two securing screws whic h h old in pla ce t h e c over to th e main copier unit’s lower tray, then remove the rear cover.

Rear cabinet

Fixing screw

8 Adjust according to "9. Center shift adjustment" in [4] UNPACK-

ING AND INSTALLATION.

Rear cover

Securi n g scre ws

2. Removing th e cut-out from the lo w er t ra y of the main

copier unit

Remove the cut-out from the bottom of the main copier unit.

4 – 9

Cut-out

3. Placing the main copier unit over t he paper feed unit

[Note]

• The following procedure should always be performed by two per-

sons. Lift the main copier unit by the grips and slip the two positioning holes on the bottom of the main copier unit over the two positioning bosses on the paper feed unit, then set the four feet on the main copier unit in their proper places on the paper feed unit.

Grips

Mounting screw "B"

Securing fixture

Mounting screw "A" Mounting screw "C"

Positioning bosses

Grips

Positioning bosses

4. Removing th e lower tray from the ma in copi er unit

While lifting up slig htly on th e m ain c opie r unit ’s l ower tr ay, pull it ou t gently as far as it will go. Then lift up on it a little bit with both hands to remove it from the copier.

5. Attaching the main copier un it and paper feed unit

Orient the protrusions on the securing fixture (one of the included parts) to ward yourself as shown in the illustr ation and attach it wit h the two mounting screws "A". Then attach the left side with the mounting screw "B". Finally, reinsert in the main copier unit the tray that was remove in step 4. Attach the rear si de of the main copier u nit to the pap er feed unit using the two securing screws "C" .

Mounting screw "C"

6. Plugging in the relay harness

Remove the tape hold ing th e conne ctor to the rear cover of th e pap er feed unit, then plug the 4P and 16P connectors into the corresponding connectors on the main copier unit.

4P connector

16P connector

Tape

4P connector

7. Mountin g th e rear cover to the main copi er unit’s

lower tray

Put the rear cover, which was removed in step 1, back where it came from and secure it with its two securing screws.

4 – 10

Securing screws

Rear cover

Securing screws

8. Set the mode.

Plug the cop ier in t o a g ro unde d ou t let and turn the power sw itch on.

• Operate the keys on the copier to set the mode.

Center line of copy paper

The above key operation will display the currently set mode.

2 6

• Immediately after the above key operation, operate the keys as

follows:

9. Centering the paper

The paper trays are adjusted at the factory, so there should be no need to center the copy paper yourself. If such an adjustment is necessary, however, follow the procedures described below.

Make a co py. If i t co me s ou t o ff cen te r as sho wn i n eit her fig ure 1 or figure 2 below, loosen the four screws which hold the front part of the tray in place.

Direction "A"

Center of cop y image (befor e ad jus tm ent )

• When copies come out off center as shown in figure 2

Move the front part of the tray in direction B, tighten first the two "a" securing screws then the two "b" securing screws, then make another copy to check whether the copies come out properly centered.

13. Tray paper size selection (Described with the SF-2020)

Select the necessary size accor ding to the follow ing proc edures. (A5 size paper is treated as a special size. When shipping, the size is set to A3.)

1. Fit the parti t i on plates in the tray according to the

paper size (hori zontal and vertic al ).

Be sure to fit with the paper scale position. Partition plate A can be slid. Hold the fixing grip and slide it to the proper pap er siz e po sition. Parti tion plat e B is of insert-type . R em o ve it and inse r t to t h e su it a ble paper size position.

Fixing grip

[Schematic illustration]

Direction "B"

[Note] When tightening down the front part of the tray, the two "b"

securing screws must be the same distance from the front part of the tray. This requirement also applies to the two "a" securing screws.

• When copies come out off center as shown in figure 1

Move the front part of the tray in direction A, tighten first the two "a" securing screws then the two "b" securing screws, then make another copy to check whether the copies come out properly centered.

Center line of copy paper

Partition plate (B)

Partition plate (A)

2. Remove th e tray.

Pull out the tray com pletely toward you and tilt upward and remove .

Center of cop y image (befor e ad jus tm ent )

4 – 11

3. Remove the si ze bl ock upward, and fit to the suitable paper size.

A3 size B4 size

Hole

Hole Hole

B5 size

Hole Hole

A5 size

Hole Hole

Special

R R

A5 size

Hole

When the size is changed to A5, fit the size block disp la y to" Sp eci a l ."

Hole

A4R

A4 size

B5 size

B5R

Hole

HoleHole

Caution

• When the tray paper size is changed, be sure to change the size

block. If not, the paper size display lamp keeps indicating the previous size.

4. Attach the t ray .

Rever se the re moving proc edure of th e tray. (Tilt u pward and inse rt the tray then push it into the machine.

5. Set paper, and chang e th e paper size display.

Remove the paper siz e dis play plate, and insert it so th at t h e selected paper size is visible from the paper size display slit. When A5 size is selected, set to "Special."

4 – 12

[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 8 ADU section (SF-2120 only)

In the c ase of SF- 2020:

The SF- 2020 is p rovided with th e three -way pa per fee d system . The tray is of the u niv er s al type an d has capacit y o f 2 50 sheets. Th e f ront loading system allows the tray to be loaded from the lower side of the front cabinet. (The SF-2120 has the two-way paper feed system with one 250sheet tr ay and manual feed.) The tray has the capacity of 500 sheets (250 sheets for the SF-2 120). In addi tion to that, th e option al paper feed uni t allows loading o f 500 sheets more for the SF-CM15 (250 sheets for the SF-CM16).

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.

Roll er r elease arm

Take-up roller

Paper f eed ro l l er

Paper feed roller shaft

SF-CM15 (Opt ion)

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 m ulti pap er feed unit are employed. Use of th e op tio nal t wo- stag e pa pe r fe ed u nit f or t he SF -CM1 5 ( onestage p aper feed unit for the S F-CM16) an d the spa re tray allow s a variety of system configurations. (System configuration) Example with the SF-2020:

SF-2020

250 sheets

50 sheets

250 sheets

SF-C M1 6

(One-step paper feed uni t)

250 sheets 250 sheets

SF-C M1 5

(Two-step paper feed unit)

250 sheets

SF-U B15

(Spare tray)

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.

(Multi manual paper feed operation)

When the MPFS (multi paper feed solenoid) turns on, the spring clutch rotates to pr ess the take- up roller on t he paper, feeding the paper.

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 .

(Detail s of DV harness co nnect or)

For color identification

GND

Resistor

*For toner density sensor

GND

*Resistance value is identified by color

2) Basic composition

For bias

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, and the developing unit identification resistance 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

100V s eries: 85V, 275W 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

(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.

(20) Original size sensing

The origin al siz e is sensed by the orig in al interrupti on system. The LED in the rear frame side emits light to the table glass surface. The original interrupts this light, and its size is detected.

Light emit

ht receivin

Table glass

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.

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 rotat ion speed < Mirror scan speed

Enlargement

Original

Reduction

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.

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 diff erence between the vo ltages 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.

5 – 7

(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

5 – 8

(2) Process diagram

High voltage unit

Original

Copy lampMirror lens

Cleani n g bl ad e

Waste toner collection

Paper exit

Discharge lamp

Main corona unit

Discharge lamp

Fusing

Heat r olle r

Heater lamp

Main corona unit

Discharging

Cleaning

Separ at ion

Separation corona unit

High voltage unit

Charging

Separation

Blank lamp

Exposure

Transfer

Transfer charger

High voltage unit

Discharge

Development

Drum u ppe r image /paper

synchronization

Blank lamp

Developer

Resist roller

Toner

Paper feed roller Transportroller

Image forming process

Paper transport path

High voltage unit

Manual paper feed Paper cassette

Cleaning blade

Seper ati on pa w l

Seperation corona unit

Developer unit MG roller

Resist roller

Transfer corona unit

5 – 9

(3) Details of image forming process

Step 1 (Main Char gi ng)

By negative discharging of the main charger, uniform negative charges are applied to the OPC drum surface. The OPC drum surface potential is controlled by the screen grid voltage to maintain the grid voltage at a constant level.

• When the drum surface potential is lower than the grid voltage,

electric charges generated by discharging of the charger go through the screen grid to charge the drum surface potential until it becomes equal to the grid voltage.

• When the drum surface potential virtually reaches the grid potential

level, electric charges generated by discharging of the charger flows through the electrode of the screen grid to the high voltage unit grid voltage output circuit, thus always maintaining the drum surface potential at a level virtually equal to the grid voltage.

• The main corona unit employs the scorotron system to charge the

photoconductor surface to a certain level uniformly. In addition, the conventional corona wire is replaced with the corona charging mechanism by saw-teeth plate (stainless steel plate of 0.1 mm thick). In corona discharge, oxygen molecules in the air are ionized to generate ozone (O3). The mechanism restrict the generation of ozone.

Main corona unit

Blank lamp

High voltage unit

Screen grid

CTL

CGL

OPC drum Aluminum layer

Step 2 (Exposure)

Light from the copy lamp is radiated on the document, and the optical image of the document is reflected by the mirrors and projected through the lens to the OP C drum. The ligh ter p orti on of th e docu men t refl ec ts more light ( high int ensit y) to the OPC drum , an d the d ark er por tion o f the docu ment ref lect les s light (l ow intensity) t o the OPC drum. Po si t iv e or negative ch ar g es ar e generated in the CGL of the OPC drum where lights are radiated. Negative charges generated in the CGL move tow ards the positive charges in the aluminum layer generated in step 3. While the positive charges in the CGL move towards the negative charges on the CPU drum surface generated in step 3. Therefore, positive charges and negati ve ch arg es a re n eutr aliz ed in the alum inum laye r an d th e OPC drum surface at the light radiating position, decreasing the OPC drum surface potential. The CGL electric charge generating amount increase s in proport ion to the d ocument density, that is, refl ected ligh t intens ity (the OPC drum surfac e intensity). Ther efore, electric ch arges are gener ated les s in th e CGL layer cor respon ding to the lig hter density of document (higher intensity of the OPC drum surface), and a greater quantity of the negative charges on the OPC drum surface is neutraliz ed, decreasing th e OPC drum surfac e potential more .

Discharge lamp

Cleaning blade

Seperation pawl

Seperation corona unit

On the contrary, electric charges are generated more in the CGL layer corresponding to the darker density of document (lower intensity of the OPC drum surface), and less quantity of the negative charges on the CPU drum surface is neutralized, decreasing the OPC drum surface less. Therefore, the OPC drum surface potential corresponding to the lighter portion of the document is lower, and that corresponding to the darker portion of the document is higher. Latent static-electricity images are formed in the above manner.

Transfer corona unit

Devel oper u nit MG roller

Resist roller

5 – 10

CTL

CGL

Low intensi ty in the area corresponding to the darker density portion of the document

Medium intensity in the area corresponding to the medium dens it y portion of the document

HIgh intensit y in the area corresponding to the lighter density of the document

Aluminum layer

OPC drum

Surface pot e nt i al

(High)

CTL

CGL

Surface potential (Medium)

Surf ace potenti al (Low)

Aluminum layer

OPC drum

Step 3 (Develop me nt )

Toner is attached to the la tent stati c-electric ity images on the drum surface to change them to visible images. The two-component magnetic brush development system charges toner positively by friction with car riers , and toner is attac hed t o nega tive cha rges on the d rum surface. The potential in the darker document projecting area (low intens ity) is high (m uch negative c harges) and a ttracts more toner. The potential in the lighter document projecting portion (high intensity) is low (less negative charges), and attracts less toner.

Discharge lamp

Cleaning bl ade

Seper ati on pa w l

Main corona unit

Seperation corona unit

Blank lamp

Devel oper u nit MG roller

Resist roller

Transfer corona unit

OPC drum

CGL

Aluminum layer

Higher surface potential (Much negative

(charges)

Medium surface potential (Less negative

(charges)

Lower surface potential (No negative

(charges)

CTL

MG roller

-200V

High v ol t age u ni t bias volt ag e

At that time, a bias of –200V is applied to the MG roller (magnet roller), which is provided for preventing toner from being attracted by the resi du al vol tag e (abo ut –80V t o –1 00V ) in the ligh te r port ion aft er exposure.

Discharge lamp

Cleani n g bl ad e

Seperation pawl

Main corona unit

Seperation corona unit

Blank lamp

Developer unit

MG roller

Resist roller

Transfer corona unit

5 – 11

Step 4 (Transfer)

The transfer paper is charged higher than the OPC drum surface potential by s tr on g negative discharge of the transfer char ge r, mak ing the binding force between the transfer paper and toner stronger than that between the drum and toner, attracting toner to the transfer paper.

Aluminum layer

CGL

CTL

Transfer corona unit

High voltage unit

OPC drum

Toner

Transfer paper

Seperation pawl

Step 5 (Separati on)

After transfer, the copy paper and the drum are negatively charged. Since, however, the negative potential of the copy paper is higher than tha t of the drum, a attract ion for ce is appl ied betw een the dr um and the copy paper. To avoid this, AC corona is applied to the copy paper by the separation charger to decrease the copy paper potential to the same level as the drum surface potential. The attraction between t he copy pape r and the drum is weakened by this, a llowing separation of the copy paper by its own extending force. If the copy paper is not separated by the separation charger, it is separated by the separation pawl mechanically.

Discharge lamp

Cleani n g bl ad e

Main corona unit

Seperation corona unit

Blank lamp

Developer unit MG roller

Resist roller

Transfer corona unit

Aluminum layer

CGL

CTL

High voltage unit

Seperation corona unit

OPC drum

Toner

Transfer paper

Discharge lamp

Cleaning bl ade

Seper ati on pa w l

Main corona unit

Seperation corona unit

Blank lamp

Developer unit

MG roller

Resist roller

Transfer corona unit

5 – 12

Step 6 (Cleaning)

Residual toner on the drum is removed by the cleaning blade. The removed toner is sent to the waste toner container by the waste toner transp ort screw.

CGL

Blade Al umi num layer

CTL

Discharge lamp

Main corona unit

Blank lamp

Residual toner

OPC drum

Step 7 (Dischargi ng)

When the OPC drum is exposed to the discharge lamp light, positive and negative charges are generated in the OPC drum CGL. The negati ve charges ge nerated in th e CGL move towards the residua l positiv e char ges in the alu minum layer, wh ile the posit ive cha rges i n the CGL move towards the residual negative charges on the OPC drum s urface. The refore, t he positi ve and the ne gative cha rges are neutralized in the aluminum layer and on the OPC drum surface, removing the residual charges on the OPC drum surface. As a result, the OPC drum surface potential becomes 20V ∼ 30V.

Dis charge lamp

Cleaning bl ade

Seperation pawl

Seperation corona unit

Main corona unit

Developer unit MG roller

Resist roller

Transfer corona unit

Blank lamp

Resi dual charge

CTL

CGL

Aluminum layer

OPC drum

Resi dual charge

Discharge lamp

Cleani n g bl ad e

Seper ati on pa w l

Seperation corona unit

Devel oper u nit MG roller

Resist roller

Transfer corona unit

5 – 13

(4) Transition of photoconductor surface potential

Develop

Charge Exposure

-730V

Dark area

-215V

Devel opi ng bia s v olt age

Light area

(5) Photoco nduc t or drum s e nsitivity correction

In this mod el, f all i n sen sitiv ity due to long use o f th e pho tocon du ctor drum is co rrected by th e copy lamp lig ht intensi ty to preven t against considerable change in copy quality. The photocondu ctor drum se nsitivity fall co rrection is performed a s follows:

Cleaner

OPC drum

Develop

Change the tickness of the carrier transport layer (CTL). By the developper. By the cleaner blade.

Residual po tentia l

(NEW)

Transfer Separate

Clean

(USED)

CLV

CLV + 2 counts (Sim46)

CL(V) + (0.33V x 2)

Sim46

(6) Process control function

[Summary]

The process control function detects the density of the standard toner image formed on the photoconductor, the density of the initial image and controls the charging grid voltage so that the same level as the initial imag e den si t y is pro vid ed . That is, the process conditions are established and the high voltage output and exposure level are controlled to stabilize the toner density. In this model, the density sensing level is automatically set.

CTL CGL

5K0 10K 15K 20K 25K 70K 75K 80K

CTL

CGL

MAin control PWB

CPU density judgement

Drum c ounter

5 – 14

I/O MC grid output selecti on

High voltage PWB

MC grid bias output (density correction ) in each mode

(Light quan tity correction)

Process control

1 Toner patch images are formed on the photoconductor surface

under the three process conditions (MC grid bias voltage). At the first process control, a toner parch image is formed with the reference grid voltage –410V as the center and ±30V. At the second or later process control, the MC grid bias voltage determined at the former process control is used as the center, and a toner patch is formed under the process condition of ±32V to the center value.

2 Measure the three toner patch images formed in the above and

the drum surface with the process density sensor to obtain the relations.

Surface

472V

440V

408V

Bias

1 2

3 2

IDPAT =PV 2 x 20 IDPAT =PV 3 x 20

Toner image Surface

Drum 1/2 rotation 2/2 rotation 3/2 rotations

1IDPAT =PV 1 x 20 2 3

Toner image Surface

IDBAS =BV 1 x 20

1 2

IDBAS =BV 2 x 20

IDBAS =BV 3 x 20

Toner image

Surface

The grid voltage value where the same density level as the reference level is obtained is displayed by Sim. 44-9 "a". This value is displayed with 50 as the center in the range of 0 ~ 99 in integer numbers. The correction for 50 is 0V (–410V), and the correction for 58 is +30V (–442V).

4 When the MC grid bias voltage is corrected by the process con-

trol, the corresponding light quantity is calculated to control the copy lamp. To correct the MC grid voltage, the delta value of the sensitivity level when the initially recorded reference grid voltage is –440V and the MC grid voltage where the same density is obtained in process control is fed back to the MC grid voltage of each mode.

Process control timing

In the SF-2035, the process control is performed in the following timing:

1 When the main switch is turned on and the first copy is made: 2 At every specified copy quantity (First copy after 1,000 copies)

Judged by the total counter. The correction is reset by Simulation 25-2.

3 After the specified time after turning on the main switch. (First

copy after 44, 60, 120, 180 min)

Drum marking

In this mo del, a toner patch im age is for med in the sa me posit ion on the photoconductor drum surface to improve the accuracy of the process control. A marking is provided on the drum and the marking is sensed before forming a toner patch image. If the marking level is not sensed, the devel oping lamp blinks and the trouble c ode (F2-32) is displayed.

BVS: Sensor detection level on the photoconductor drum surface PVS: Sensor detection level with the toner patch image

Obtain the above two levels from the calculation formula and record them as the reference values.

A. STD BA: Reference level when detecting the drum surface

→ STD BA = BTS x 20

B. STD PA: Reference level when detecting the toner patch image

→ STD PA = PTS x 20 In the density correction, the process conditions are determined so that the ratio of the reference levels may be maintained at constant.



STD PA



set in the above





STD BA





3 Obtain the MC grid bias voltage from the reference level ratio.

( ”ä)

ID PAT3

STD PA

STD BA

GB PAT

-440-410-380

ID BAS3 ID PAT2

ID BAS2 ID PAT1

ID BAS1

MC grid bias voltage

In the SF-2214/2118, the absolute value of the output of the density sensor is not directly used for control calculation, but the ratio of the sensor output value (BA) on the drum surface and the sensor output (PA) of the toner patch image is used for control calculation.

* The grid bias value is obtained so that the ratio of the drum

surface level and the sensor level when forming patch level and the sensor level when f orming patch im ages is 200:40.

Though , therefor e t h e light quan ti t y of the reflection type se ns or is varied by dirt or deterioration, the ratio (PA/PB) will not be affected by change in light quantity to provide stable control.

6mm x 7mm

Basic struct ure

Photoconduct or drum: The 65mmφ ground plate of the OPC

Blank lamp: The non-image area is exposed by the

Discharg e lamp: Eight bulbs cast light ove r the drum sur-

Cleaning mechanism: The cleaning blade removes the toner

Main corona: The saw teeth corona charge method is

Enforced separation mechanism:

drum is on the rear frame side of the drum unit so that it contacts the drum locator pin.

light from the blank lamp to erase the positive potential outside the drum CTL. Use of the latchet simplifies the lamp position adjustment.

face to erase t he positive po t e ntial in CTL . Ventilation hole provided in the drum frame releases heat from bulbs.

remaining on the drum surface. The blade always rests on the drum surface.

used. Use of the screen grid maintains the even charge potential over the photoconductor surface.

Using tw o pieces of separat ion pawl, the copy pa per st uck over t he dru m surfa ce is forced to separate from the drum surface.

5 – 15

Waste toner transport mechanism:

The waste toner is passed through waste toner transp ort scre w 1 and wast e toner pipe 2 to waste toner bottle 3. Waste toner bottle 3 is rotated by the main drive gear via gear 4 to transport toner evenly. When the waste toner bottle is full of waste toner, the rotatio n torque of gear 4 is increased to escape gear 5 in the arrow direction A, and switch 6 is turned on at the same time to light the waste toner replacement lamp.

(5) TRANSPORT/FUSING SECTION

1) General

The SF-2116/2118 allows transport of paper of max. A3 (11" x 17") and min. A5 (8 1/2" x 5 1/2"). After images are transferred on the paper, the paper is separated from the drum by the separation pawl and transported to the fuser section by rotations of t he resist r oller and the tran sport belt. The dru m separation pawl is provid ed under the p rocess unit. It is made by turning on (separating) the solenoid inside the main drive unit.

2) Basic compo si tion and functions

1 Transport belts (2pcs)

The transport belts are provided with notches to hold paper rear ends.

Paper

Feeding direction

Transport belt

(6) Fusing paper exit section

1 Upper heat roller

The upper heat roller is teflon-coated.

2 Lower heat roller

A silicone rubber roller is used.

3 Separation pawl

The upper heat roller is equipped with four pawls which are teflon coated to reduce friction. the lower heat roller is equipped with two pawls.

4 Upper/lower separation function

The upper and lower heat roller sections are separated by rotating operations with the transport roller as a fulcrum, providing better serviceability.

5 – 16

5 Drive system division

The fuser unit is rotated by the main drive unit. In case of manual rotation of the fuser unit to remove paper jam, however, excessive loads may be applied to the gears. To prevent against this, the pressure of the upper/lower heat rollers is reduced when the machine clamshells are opened. In addition, the fusing gear is so constructed that the drive is not transferred to the drive system.

Stirring roll er

MG roller

Transport roller (upper)

Transport roller (lower)

DV drive unit

PS roller

Multi manual insertio n p ap er feed un it (Option)

Paper feed unit

Proccess unit

Paper fe ed rive unit

Main drive unit

Cleaner unit

Transport unit

Main motor

Fuser unit

Paper ex it roller

Thermo control

Heat roller surface temperature detection

The heat roller is heated by the heater lamp. (When the heat roller surface

CPU

Thermistor

Heat r olle r

Heater lamp

temperature is 190 C˚ or lower, the heater lamp is actuated)

(Heater trouble) Self diag display

Thermostat

Contact open (*)

Abnor m al h i g h temperat ur e

(7) High voltage section

1) General

There are three kinds of coronas; the main corona, the transfer corona, and the separation corona. The main corona employs the scorotron system, where the drum surface is evenly charged with negative charges controlled by the screen grid between the corona and the drum. The transfer corona is used to transfer toner images on the drum to th e cop y pape r. A high, negat ive voltag e is app lie d to the rear side of the paper. The separation corona applies AC corona to the copy paper to eliminate potential difference with the drum to allow separation of th e paper. The o utput vol tage of t he main ch arger and the transfe r charger is supplied by transformer 1. The feedback current from the transfer charger is controlled to be constant and outputted to the main charger.

2) Basic composit i on

1 Main (charging) corona – High voltage transformer (MHVG)

Grid voltage Developing bias voltage Standard mode –750V Photo mode –500V –200V TSM mode –650V

2 Main transfer corona – High voltage transformer (THVG)

–41µA (Electrode sheet fron t-rear balance di fference: max. 7.0µA)

3 Separation corona – High voltage transformer (SHVG)

AC4KV ±0.1KV

(8) ADU unit (SF-2120 only)

1) Basic operati on

The ADU unit is stor ed a bove the pape r ca sset te i n the l owe r sid e of the copier. In the duplex copy mode, the copy paper is passed from the fusing unit through the reverse roller to the ADU, where it is aligne d by the alig nment plate. Then it is pressed onto the take-u p roller by the pape r ho lding plate , and only one sheet is tran sported by the pa per fee d and rev erse roll er. It is tra nsported f rom thr ough the transport roller to the copier, where duplex copy is made.

• Abnormally high temperature (H3) 240°C or upper

• Abnormally low temperature (H4)

• Thermistor disconnection (H2)

* When the ther mostat contac t is open, it is re quired to press th e

reset button in the upper side of the thermostat. (The contact is not reset automatically.)

Reverse roller

Paper f eed ro l l er

Cur corr e c t i o n u n i t

Take-up roller

5 – 17

Rear edge plate

Transpor t up per u nit

DPHPS2 (Rear edge plate home position sensor)

DPTD (DDM rotary encoder sensor)

-1

-2

DPHPS1 (Alignment plat e hom e posit ion sens or)

2) Details of operation

1 The alignment plate and the rear edge plate detect the home

positions, and moves to the paper size position. (ADU motor 1, 2, ON)

2 Paper exit, reverse unit operation (ADU gate solenoid ON) 3 Rollers in the ADU rotate in the direction of paper entry. (ADU

drive motor ON)

4 ADU paper entry detection (ADU paper entry/exit sensors 1, 2

ON)

5 ADU paper presence detection (ADU paper sensors 1, 2 ON)

(5-1 is used only in the AB series.)

6 Rollers in the ADU rotate in the direction of paper exit. (ADU drive

motor ON)

7 Holding plate operation (Take-up clutch ON) 8 Take-up roller. paper feed roller rotation (Paper feed clutch ON) 9 ADU paper feed detection (ADU paper entry, exit sensor ON) F ADU paper transport detection (ADU transport sensor ON)

ADU sensor list

Signal name Name Type Operation, function DPHPS1 Alignment plate home position sensor Transmission sensor LOW at home position DPHPS2 Rear edge plate home position sensor Transmission sensor LOW at home position DPED1 Paper sensor 1 Transmission sensor HIGH with paper present DPPD1 Paper entry sensor Transmission sensor HIGH with paper present DPED2 Paper sensor 2 Transmission sensor HIGH with paper present DPOD Paper exit sensor Transmission sensor HIGH with paper present DPTD DDM rotary encoder sensor Transmission sensor Motor rotation detection

5 – 18

[6] DISASSEMBLY AND ASSEMBLY

The descriptions are divided into the following sections.

1. Paper feed section

2. Transport section and power section

3. Fusing section

4. Optical system

5. SPF section

6. Drum section

7. Developing section

8. Operation panel section and intermediate cabinet

9. Major parts on the frame side

10. Manual multi paper feed unit (SF-MF15, option)

11. Paper feed unit (SF-CM15, SF-CM16, option)

1. Paper feed section

1-1. Paper feed unit

1 Open the front cover and lift up the upper clamshell. Remove two

fixing screws of the manual paper feed section, and remove the manual paper feed section.

(Note for assem bly)

1) There is the 8-pin connector on the back of the rear frame side. When assembling it, carefully insert.

2) The belt must be on the paper feed unit gear and the resist roller gear.

1-2. Paper feed roller ass’y removal

1) Remove the rear frame side electromagnetic clutch connector.

2) Remove the front frame side stopper and the bearing.

3) Remove the roller release arm spring from the paper feed frame.

2 Remove the four fixing screws (M4 x 10 x 1pcs, step screw x 1 pc)

of the paper feed unit, and lift the rear frame side of the paper feed unit and remove it. (Since there is the 8-pin connector on the back of the rear frame side, it requires some force to remove. Carefully pull it out straight.)

4) Remove the rear frame bearing, and one side of the paper feed roller ass’y will be disengaged. To remove the ass’y completely, remove the E-ring.

(Note for assem bly 1)

With r oller rel ease arm s pring A hooke d on th e spring notch, att ach the pa per feed r ol ler a ss ’y to the pa per feed unit, and ho ok the spring on the paper feed frame.

6 – 1

(Note for assem bly 2)

When a tta ching the pa per f eed sect ion rolle r as s’y, adjust so t hat t he paper fee d roller clutch an d the PS fron t roller ass’y clutc h projec tion face toward the paper feed side.

1-4. Separation roller

1 Remove the paper feed unit and remove the separation roller.

1-3. PS front roller ass’y

1 Remove the paper feed unit. (For the details, refer to the 1-1.) 2 Disengage the hook section of the front frame side bearing,

remove the connector on the rear frame side, and remove the PS front roller ass’y from the paper feed frame.

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

1 Remove the paper feed roller, and remove the take-up roller.

2 Remove the roller holder, the stop ring, the bearing, and the paper

feed roller.

6 – 2

(Note for assem bly)

Attach the paper feed roller so that the one-way clutch is on the rear frame side. (Be careful of the direction.) Attach the roller holder as shown below.

One-way clu tch side

1-6. Lower paper feed unit

(SF-2118 only): Perform similarly for the optional

two-stage paper feed unit.

Remov e two screw s and remove the lower paper feed unit.

1-8. Transport roller

Perform similarly for the optional paper feed unit.

Remove the lower paper feed unit. (Refer to 1-6.)

1 2 Remove the stopper, slide the bearing, and remove the transport

roller.

1-7. Lower separation roller

(SF-2118 only): Perform similarly for the optional

two-stage paper feed unit.

1 Remove the lower paper feed unit. Refer to 1-6.) 2 Remove the paper feed frame. (4 screws, 2 connector) 3 Remove the separation roller.

1-9. Lower paper feed roller/take-up roller

For removal of these rolls, refer to 1-2 (Paper feed roller ass’y) and 1-5 (Paper feed roller, take-up roller).)

2. Transport unit

2-1. Resist roller, transfer roller

1 Open the front cover. 2 Release two lock pawls of the TC case, and lift the front side of

the TC case to remove.

6 – 3

3 Remove the hook of the front frame side bearing, and lift it up to

remove it toward the upper frame side. Remove the rear frame side connector, and slide and remove the resist roller ass’y toward the rear frame side.

TC/SC case

4) When attaching the resist roller ass’y to the copier, attach over the upper side of the PS roller lower mylar, then rotate the roller to set the mylar to the normal position. (If the mylar is deformed, it may cause paper jam. Replace it if deformed.)

PS mylar

4 Remove the clutch and the gears as shown below.

(Note for assem bly)

1) Attach so that the resist roller clutch projection is on the paper exit side as shown in the figure below.

2) Arrange the cable and the power grounding wire from the resist roller clutch as shown in the figure below.

3) Hook the hook section of the TC case as shown below.

2-2. Transport belt

1 Remove the fusing unit. 2 Remove the TC case. 3 Disengage the transport belt drive shaft holder on the TC case

side, then disengage the drive shaft on the paper exit side and remove the belt.

(Note for assem bly)

There is a mark ( î ) on the transport belt. Set so that the tip of

the mark faces toward the paper exit direction.

2 Be careful of the installing direction of the transport belt drive

shaft.

6 – 4

3. Fusing section

3-1. Fusing uni t removal

1 Open the front cover. 2 Push the open/close lever down to the right side, and slowly open

the upper unit.

3 Remove the fixing screw of the fusing connector cover and

remove the cover.

4 Remove the fusing unit hanging wire from the copier frame and

remove two connectors from the unit.

(Note for assem bly)

When removing the unit fro m the copier, ba careful not to scratch the photoconductor drum and the lower heat roller. Be careful not to break the actuator of the paper exit sensor (POD).

3-2. Heater lamp replacement

1 Remove the fusing cover fixing screw (1 pc.), and slide the cover

to the front side to remove.

2 While pressing the Fasten terminal projection connected to the

thermostat, remove the lead wire from the connection section.

3 Remove the fixing screw of the lamp holder on the upper side of

the rear frame, and remove the holder.

5 Remove the stop ring and remove the unit.

4 Pull out the heater lamp from the front frame side.

For assembly, reverse the disassembly procedures.

3-3. Upper heat roller ass’y removal

1 Remove two fixing screws of bearings of the front and the rear

frames.

2 Push the paper guide down to the paper exit side and separate

the separation pawl from the roller and fix it.

3 Rotate the bearing fixing screws about 45 degrees downward and

remove the ass’y.

For assembly, reverse the disassembly procedures.

6 – 5

3-4. Upper separation pawl replacement

1 Remove the fusing unit, and remove the cover. 2 Put the fusing unit so that the paper guide is on the lower side of

the fusing unit (the separation pawl is on the upper side).

3 Remove the tension spring, hold the separation pawl tip and

remove it from the supporting section, and remove it from the unit by tilting.

For assembly, reverse the disassembly procedures.

(Note for assem bly)

Assemble so that the lower separation pawl is on the upper side of the lower hea t roller. (At that time, return th e separation pawl which was set upright in procedure (2).)

3-6. Lower separation pawl replacement

1 Remove the fusing unit. 2 Remove the lower heat roller.

3-5. Lower heat roller replacement

1 Remove the fusing unit. 2 With the lower separation pawl upright, slide it to the rear frame

side and keep the lower separation pawl upright.

3 Remove the lower heat roller together with the bearing.

For assembly, reverse the disassembly procedures.

3 Remove three screws and remove the lower separation pawl unit.

5 Remove the tension spring, hold the separation pawl tip to remove

it from the supporting section, and remove it by tilting.

6 – 6

3-7. Thermistor/thermostat removal

1 Remove the fusing unit. 2 Remove the fusing cover, and remove the thermistor/thermostat.

(B)

Optical adjust ment pl ate

* Note for assembly

• Check that the thermistor center is in contact with the heat roller.

• Clean the thermistor surface with alcohol to remove foreign

materials.

4. Optical system

The o ptical system is an in tegrated f inish produc t delivered b y the maker as stated in t he previous se ction. The r e pl acement p roc edures for the major parts in the optical system are described here.

1) Copy lamp replacement

1 Remove the OR guide, and remove the table glass. (2 screws) 2 Slide the copy lamp unit to the notch at the rear of the upper

cabinet. Push the copy lamp electrode (section A) in the arrow direction B, and remove the lamp. Do not move the optical adjustment plate. (If it is moved, the light balance will go wrong.)

Install so tha t the pr ojecte d porti on of t he copy lamp is ne ar the re ar side as shown above.

2) Mirror base wire replacement and adjustment

A. Copy lamp unit remova l

Remove OR guides R/L, and remove the table glass.

Note: Be careful of the installing direction of the copy lamp.

6 – 7

2 Remove the operation panel, the upper cabinet R, and the right

cabinet.

3 Remove the dark box cover upper.

B. Mirror base wire removal

Remove the upper cabinet L, and the left cabinet.

2 Remove the mirror wire spring from the groove on the left side of

the optical base plate.

4 Manually move mirror base B. (Within the range where the wire

fixing plate fixing screw can be removed.)

5 Remove the wire fixing plate in the front/rear frame side of the

copy lamp unit, and remove the wire from the side plates F/R.

6 Remove the harness from the copy lamp unit. 7 Rotate the copy lamp unit counterclockwise to remove.

3 Remove the mirror base wire from the winding pulley.

(Remove he wire fixing screw.)

C. No. 2/3 mirror un it ( mirror base B) removal

Move the mirror base B to the center between the positioning and

the optical base plate left surface.

2 Lift the front side of mirror base B and separate it from the rail.

(The front side only)

6 – 8

3 Rotate the mirror base B counterclockwise to remove. 4 Disconnect the connector from the copy lamp unit on the rear

frame side and from the No. 2/3 mirror unit.

5 Rotate the No. 2/3 mirror unit counterclockwise and remove.

1 Hook the metal fixture of the mirror base wire on the optical base

plate hook.

2 Pass the mirror base wire along the groove outside the double

pulley. <Note> At the time, put the No. 2/3 mirror unit on the mirror base

positioning plate. Hold it so that the winding pulley groove is on the upper side, and wind the wire.

4 Pass it under the moving pulley supporting plate and wind it

around the fixed pulley.

5 Pass it along the groove inside the double pulley. 6 Pass in through the L pulley. 7 Hook the mirror base wire spring on the groove at the left of the

optical base plate. (Same in the front and the rear side.)

D. No. 2/3 mirror un it ( mirror base B) assembl y

Reverse the above procedures.

E. Mirror base wire stretching

Check th at the wir e groov e in the front wind ing pulle y is ali gned with the wir e groove in the re ar winding pull ey. (If there is too much a shift in the circumference, loosen two pulley fixing screws, and visually fit the positions and fix.

4 6

F. Mirror base wire fixing

2 Shift the 9th winding tip of the mirror base wire from the pulley

Manually turn the mirror base drive pulley to bring the mirror base B into contact with the mirror base positioning plate.

screw hole section.

6 – 9

Mirror base B

2 If the parallelism of the mirror base B is improper as shown in the

figure below (one side of the mirror base B is in contact with the positioning plate and the other side is not in contact), perform the following procedure.

3 Loosen the mirror base drive pulley fixing screw on the side where

the mirror base B is not in contact with the positioning plate.

4 Manually rotate the mirror base drive pulley on the side where the

mirror base B is not in contact with the positioning plate to bring the mirror base B into contact with the positioning plate.

3 Fix the mirror base wire to the pulley with the mirror base wire

fixing screw.

4 Return the 9th winding tip of the mirror base wire to the original

position. (Perform the same procedure for the front frame side and the rear frame side.)

(Note) After replacing the mirror base drive wire, perform the vertical

skew adjustment, the focus adjustment, and the horizontal skew adjustment.

3) No. 2/3 mirror unit (mirror base B) installation

(Mirror base B positioning)

This is to adjust the parallelism of mirror base B and the drum surface and the original surface. This adjustment must be performed in the following cases:

• When the mirror base drive wire is replaced.

• When mirror base A or mirror base B is replaced.

1 Manually turn the mirror base drive pulley to bring the mirror base

B in contact with the mirror base positioning plate. If the front side and the rear side of the mirror base B make contact with the mirror base positioning plate simultaneously, the parallelism of the mirror base B is proper, and there is no further adjustment.

Mirror base positionin g pl ate

5 Tighten the mirror base drive pulley fixing screw. 6 Manually rotate the mirror base drive pulley to separate the mirror

base B from the mirror base positioning plate once, then bring it into contact with the positioning plate. Check that the front side and the rear side of the mirror base B make contact with the positioning plate simultaneously.

7 If the condition of 6 is not satisfied, repeat procedures 3

through 6 until the condition is satisfied.

No.2/3 mirror un it

6 – 10

4) Copy lamp unit installation (Mirror base A

positioning)

This adjustment must be performed in the following cases:

• When the mirror base drive wire is replaced.

• When the mirror base A or B is replaced.

• When any part in the dark box is replaced.

When installing the mirror base, reverse the removal procedure of (2)-A.

1 Put the mirror base A in the copier. Pass the mirror base drive

wires in the front frame side and the rear frame side through the clearance between the mirror base A and the mirror base wire fixing plate. Do not tighten the mirror base A wire fixing screw at that time.

2 Bring the mirror base B into contact with the positioning plate, put

a flat jig (such as a scale edge) onto the right surface of the optical base plate (paper feed side), press the projection of the copy lamp unit onto the jig and fix it with two screws.

(Note) When tightening the copy lamp unit fixing screws, be sure to

press the projection onto the scale.

Horizontal scales

2 Remove the dark box cover upper.

3 Remove the right cabinet.

Projections

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

A. No. 4/5 mirror removal

1 Remove the OR guide L and R, the remove the table glass.

4 Remember the positions of the lens drive shaft attachment plate

(in the directions of A and B) (Inscribe a line).

Inscribed line

* (IMPORTANT) This is to prevent against defective focusing.

(Measurable with a scale.)

6 – 11

5 Remove the drive springs 4 and 5.

6 Remove the zooming rack of the roll holder unit.

8 Remove the drive shafts 4 and 5.

* When removing th e No. 4/5 m irror unit, r emember the p ositions

(scales) of the arrow marks of the drive holder 4 and 5.

Zooming rack

7 Remove the lens drive shaft attachment plate.

No.4/5 adjustment screw

No.4/5 drive latch stop s cr e w

No.4/5 dri ve holder

B. No. 4/5 mirror unit assembly

Reverse the above procedures. <Note>

When attaching the lens drive shaft attachment plate, attach it to position 5 in the above description. Fit the arrow positions of the drive holder 4 and 5 as the previous state.

Zooming rack

No.4/5 adjustment screw

No.4/5 drive latch stop s cr ew

No.4/5 dri ve holder

* When the arrow positions cannot be fit:

1 Loosen the zooming rack screw and slide it to adjust. 2 Loosen the two screws which are fixing the driver holder 4 and 5

and the drive latch 4 and 5. Adjust with the drive holder 4 and 5. After completion of adjustment, tighten the two screws.

6 – 12

6) Lens wire replacement

A. Lens wire removal

1 Remove the OR guide L and R, and remove the table glass.

2 Remove the dark box cover upper.

4 Remove drive spring 4 and 5.

5 Remove the E-ring which is fixing the roll holder drive shaft, and

remove the roll holder unit.

3 Remove the lens motor.

6 Remove the zooming cam and the zooming cam drive gear (which

are fixed with screws).

6 – 13

7 Remove the drive wire spring and the wire hook from the lens

carriage boss.

L drive pulley

Lens unit

2. Procedures

Manually move the lens carriage unit to fit the lens carriage hole

with the optical unit frame hole (which is not the home position hole but the reduction side hole). Insert a pin into the holes, fix the lens unit, and stretch the wire.

Lens carriage unit

Wire SP

Wire hook

8 Remove the L pulley and the L drive pulley from the lens wire.

B. Lens wire stretching

1. This procedure is performed in t he following case .

(1) When the lens unit is removed. (2) When No. 4/5 mirror drive unit is disassembled. (3) When the copy is out of focus because relative position of the lens

unit and No. 4/5 mirror unit is shifted by moving the lens unit itself back and forth without turning the L drive pulley.

* In o rder to mo ve the le ns unit of th is machine back and for th in

servicing, b e sure to tu rn the L drive pu lley. (If the lens unit its elf is moved, the wire may slip at the L drive pulley and the relative position of t he le ns un it and No. 4/5 mirr or uni t is shifte d, result ing in improper focusing.)

L drive pulley

Lens unit

2 Under the above state, fit the zooming cam drive gear hole with

the No. 4/5 drive unit base hole A (by inserting a pin, etc.), and insert the zooming can drive gear into the shaft.

Zooming cam dr i ve g ear

Shaft

Hole

Hole A

Hole B

3 Remove the pin which fixes the lens unit and the zooming cam.

6 – 14

4 Manually turn the zooming can drive gear to fit the zooming cam

drive gear hole and No. 4/5 mirror drive unit base hole B.

6 Loosen the zooming cam screw, and fit the mark of zooming cam

drive gear with the mark of No. 4/5 drive shaft.

Zooming cam

Hole

drive gear

No. 4/5 mirror drive uni t b ase

Hole B

Zooming cam dr i ve g ear

5 Install No. 4/5 mirror drive shaft unit and the rack.

* When installing the rack, be sure to fit No. 4/5 mirror unit projection

with No. 4/5 mi rror drive shaft unit hol e.

Zooming cam

Zooming cam gear

Do not mov e the z ooming c am gea r at this time.

∗

No. 4/5 mirro r drive shaft unit

Hook

Mark

* After this procedure, be sure to perform the optical system adjust-

ments (focus adjustment, etc.). (Refer to [7] ADJUSTMENTS.)

7) Lens unit replacement

A. Lens removal

Remove the lens wire. (Refer to the procedure of "A. Lens wire

removal" in 16) Lens wire replacement.)

2 Hold the lens drive shaft with radio nippers and remove it.

Notch in the optical base plate.

3 Remove the lens drive shaft from the notch in the optical base

plate. The lens unit is removed at that moment.

B. Lens unit installation

Reverse the disassembly procedures. (Refer to (6)-B. Lens wire stretching.)

6 – 15

5. High voltage section

Clean th e M C case, and the TC/SC case every 50K copies. Clea n the screen grid, the charging plate (saw teeth), and the TC/SC wire every 50K copie s, and replace them every 100K co pie s.

5-1. Main charger (MC) unit

1 Open the front cover. 2 Hold the MC unit lock section, and pull out the MC unit.

4 Remove the screw and remove the charging plate (saw teeth)

ass’y.

(Cleaning/replacement and note)

1 When attaching the screen grid, be careful not to deform and dirt

the screen grid. Check that the screen grid is securely in position.

3 Loosen screws A and B, and remove screen grid E.

(When attaching the screen grid, tighten screw B until the mark- ing position F of grid holder C in the above figure is aligned with marking position F of MC holder D, and tighten screw A.)

2 Be careful not to deform the saw teeth edge of the saw teeth

ass’y.

3 Do not touch the inside (saw teeth ass’y) of the MC case, the

screen grid, and the saw teeth.

4 To clean the MC saw teeth, push styrene foam onto the saw teeth

at right angles and remove dirt.

6 – 16

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

1 Open the font cover, open the body up. 2 Push TC/SC unit pawl sections A (2 positions) and lift the front

side and pull it out.

5 When installing the unit to the body, check that the grounding

spring is in contact with the TC/SC case (metal section) on the rear and the front sides. (Visually check, and push the center of the TC/SC unit to check that it can be moved up and down.)

Front

TCUN

Rear

(Cleaning/replacement and precautions)

1 Set the charger SP length to 17 ±1.0mm.

17 1.0

Front pawl

Base plate

Rear pawl

6 Transfer mylar lower

TC mylar lower attachment reference

0~0.5

1.5 0.5

1.0 0.5

6. Process section

6-1. Process unit

1 Open the front cover, remove the developing unit, and open the

clamshell.

2 Remove process cover A. (Loosen the screw to remove.) 3 Loosen two blue screws which are fixing the unit. Remove one

screw, disconnect one connector, and remove unit B. (Do not hold the toner transport pipe.)

2 The charger wire must be free from distortion and deformation,

and must be in the wire positioning groove of each holder.

3 The charger case must be free from oil, dirt or adhesion of foreign

material.

3~5mm

4 Clean the wire with alcohol.

6 – 17

6-2. Waste toner bottle replacement (required when

waste toner full detection/maintenance)

1 Take out the process unit as shown above,

<Note> If the unit is removed by holding the toner transport pipe,

toner is spilled. Avoid this.

2 Remove the bottle cover. (2 screws)

3 Rotate waste toner bearing 1 A 90 degrees counterclockwise.

Hole the base of toner transport pipe B and pull it out. (At this time, toner may be spilled. Put a sheet under the pipe.

4 While pushing waste toner bottle in the direction of A and lift it

and remove.

(Note for assem bly/maintenanc e)

As shown in the figure below, attach so that two projections of

gear 19T g are on the rear frame side (on the screws supporting plate f side).

2 Replace the waste toner bottle when waste toner full is detected

or at 50K maintenance. At this time, clean and remove the waste toner from waste toner pipe A.

6 – 18

6-3. Drum (Replace every 50K copies)

1 Remove the process unit from the copier. (Refer to 6-1.) 2 Loosen two blue screws which are fixing the drum, rotate the plate

slightly to the right and pull it out.

3 Remove the drum.

<Note> Be careful not to scratch the drum.

6-4. Blank lamp unit (Clean every 50K copies.)

1 Remove three blue screws which are fixing the process unit

holder, slide the holder and remove it.

2 Tighten the blank lamp unit position adjustment screw completely,

and remove the unit rear side, then loosen the screw.

6-5. Discharge lamp unit (Clean every 50K copies.)

1 Remove three blue screws which are fixing the process unit

holder, slide the holder and remove it.

2 Remove the discharge lamp unit. (one screw, one connector)

3 Remove two connectors of the blank lamp PWB, and remove the

blank lamp unit.

<Note> When the unit is installed or replaced, adjust according to

"Blank lamp position adjustment" in [7] ADJUSTMENTS.

6 – 19

6-6. Cleaner blade (Replace every 50K copies.)

1 Remove the holder from the process unit. (3 blue screws) 2 Remove the cleaning blade. (3 blue screws)

6-7. Drum separation pawl (Replace every 50K

copies.)

Slide and remove the blue pin to remove the separation pawl. Replace the st ar-shape washer with a new one if it is worn down.

7. Developing secti on

A. DV side seals F/ R rep lacement (Replace every 120K

copies.)

1 Remove two screws which are connecting the hopper section and

the developing unit, and separate them each other.

Fixing screw

2 Replace the developing unit side seals F/R as shown below.

Toner hopper

Developing unit

6-8. Process control PWB (Clean the sensor

section every 50K copies.)

1 Remove the holder from the process unit (3 blue screws), and

remove the connector of the process control PWB.

2 Remove the holder of the process control PWB (2 screws), and

remove the PWB (2 screws).

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

section every 50K copies.)

Remove the holder from the process unit (3 blue screws), and remove the marking sensor PWB. (1 screw).

6-10. Toner reception seal (Replace every 50K

copies.)

Remove the drum and remove two screws to remove the seal.

(Side seal R attachment reference)

(Side seal F attachment reference)

Note: Since the developing side seals are in the vicinity of the drum,

be careful of peeling off and defective attachment.

6 – 20

B. DB blade replacement (Replace every 120K copies.)

Remove the old DV blade from the DV cover. (Remove the duplex

tape.)

2 Attach th e new DV blade with t he pasteb oard as sh own below.

(Attach the DV blade to the reference of A and the inscribed line ( 0.2). Do not allow extrusion from the edge. Do not allow covering the inscribed line. The allowable reference shift is within

0.5mm from the inscribed line. Attach the sheet without being wavy.

Magnet fixing shaft

Plate MFE

MAG roller

6.5

DV cover

DV blade

3 Remove the base pasteboard from the DV blade.

Note: If the pasteboard is not removed, the drum is scratched.

C. V ring attachment

Be carefu l of the direc tion of the V ring when at taching it t o the MG roller and the MX roller.

Plate MFE

V ring

+0.5

3.0

V ring

Section A

(MG roller)

-0

Do not allow contact between φ 6.5 hole in the plate MFE and the magnet fixing s haft. Remove oil and dirt from the attachment section.

@ Note: When attaching the MG roller, put the milled surface up.

D. Note for toner hopper drive gear (31T) and st irring

shaft attachm ent

• Be careful of the stirring shafts A and B attachment positions.

Stirring shaft B

Attach so that the angle between stirring shaft A and B is 90 degrees.

• When attaching the toner hopper drive gear (31T), be careful of

the E-ring stop position as shown below. (If the E ring is on the milled surface, it is apt to disengage.)

31T gear

Section A

V ring

(MX roller)

V ring

Section A

1 As shown above, be careful of the direction of the V ring. 2 Do not allow clearance at section (A) between the V ring and each

roller.

3 Attach the MG roller and the right V ring as shown in the figure.

(3.0

)

−0

@ Note: When replacing the MG roller, attach the plate MFE.

6 – 21

G. Developing unit color identif ic ation

Color id entif ica tio n is ma de for dif fer ent r esist ance s of th e de velop ing unit.

Vref (About 4.5)

6.2KF DVC

Developing unit

9. Frame major parts

9-1. Cooling fan motor replacement

A. Cooling fan motor removal

Remove the original cover, the original guide, the upper cabinet

left, and the upper cabinet right.

Color Black 0 0

Red 6.2 2.25 Blue 12.0 2.97

Resistance

(KΩ)

Identification signal voltage (DVC) [V]

8.Operation panel/intermediate cabinet

1 Open the front cabinet. 2 Remove two screws A, two screws B, and two harnesses con-

nected to the operation panel unit.

2 Remove the operation panel unit. 3 Remove the process cover unit, remove six screws C and two

connectors, and remove the intermediate cabinet.

2 Remove the upper cabinet and the rear cabinet.

3 Remove the cooling fan from the CFM duct. (2 screws, 1 connec-

6 – 22

tor)

B. Cooling fan motor

Label

Reverse the removal procedures. <Note> When attaching the cooling fan motor, put the harness sec-

tion B and the CFm duct groove section A in the same direction, and pass the harness in the groove. Check that the fan center label is on the back when viewed from the rear of the machine. Check that air blows in the arrow direction (toward the machine).

9-2. Power unit

1 Remove the rear upper and lower cabinets. 2 Remove two connectors, hold the PWB fixing bush with radio

nippers and slide it toward the paper exit side to remove.

9-3. Tray size detecting PWB

1 Remove the rear upper/lower cabinets. 2 Remove the power unit. 3 Remove one fixing screw, one connector, and remove the tray

size detection PWB.

6 – 23

9-4. Main PWB unit

1 Remove the rear cabinet upper. 2 Disconnect all the connectors (6 connectors) connected to the

main PWB.

3 Remove the main PWB plate (one screw). 4 Remove the main PWB from the plate. (2 screws)

9-5. AC power PWB

1 Remove the main PWB unit. (Refer to 9-3.) 2 Remove the rear cabinet lower. 3 Remove all the connectors (11 connectors) of the AC power PWB

and remove one grounding wire connected between the AC power PWB and the copier chassis.

(SF-2120)

2 Remove the ventilation fan motor (2 screws). (SF-2020)

4 Remove two screws which are fixing the AC power PWB, and

remove the PWB.

9-6. Ozone filter (Check every 50K copies, and

clean every 100K copies.)

1 Remove the upper cabinet left, and the left cabinet. (5 screws)

3 Remove the process unit. Insert a screwdriver from the process

unit position into the copier to push out the oZone filter. (SF-2020)

(SF-2020)

6 – 24

10. Multi paper feed unit (SF-MF15: option)

10-1. Separation roller

1 Remove three screws and remove the paper feed/take-up roller

ass’y.

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

1 Remove the manual feed arm spring, the bearing stopper, and the

E-ring. (At this time, slide the bearing from the guide section in advance.)

2 Lift the manual feed stopper, and remove the manual feed shaft

ass’y.

3 Remove the take-up roller.

2 Remove the separation roller.

@ When attaching the roller, engage the D-cut section with the

groove.

4 Remove three E-rings, and remove the manual feed shaft. then

the paper feed roller will come off.

(Note for assembly) The pa pe r fe ed roller is provided wi th t h e o ne - w ay clu tc h, which must be installed in the proper direction. Attach so that the side where there is the one-way clutch (specified with "LOCK") is on the front frame side.

6 – 25

1 1. ADU

1 Remove the extension stopper, and remove the ADU from the

copier.

2 Remove the four fixing screws (M4 × 8) of the ADU cover, and

remove the ADU cover.

3 Remove the six fixing screws (M4 × 10 = 4 pcs., M4 xc 8 = 1 pc.)

of the transport frame lower unit, and remove the unit from the ADU unit. At that time, slightly lift the transport frame lower unit to disconnect the paper entry/exit sensor connector.

6 Remove the reverse roller.

(Perform the s am e proce dures for the take-up roller. )

1 Remove the extension stopper, and remove the ADU unit from the

copier.

2 Put the ADU unit up side down. (The lower side facing up.) 3 Remove two plastic E-rings. 4 Slide the bearing in the arrow direction (inward). 5 Remove the paper feed roller shaft from the ADU unit. 6 Remove the plastic E-ring, and pull out the paper feed roller in the

arrow direction.

4 Remove the E-ring of the reverse roller, and remove the pressure

spring.

5 Remove the reverse shaft fulcrum lever ass’y and slide the

reverse roller shaft in the arrow direction to remove.

6 – 26

Remove three fixing screws (M4 × 10) of the left cabinet, and

remove the left cabinet. Remove the plastic E-ring which is fixing the paper exit cabinet unit, and slide the paper exit cabinet unit in the arrow direction and remove it from the copier.

2 Remove two fixing screws (M4, flat) of the paper exit cabinet unit

and one fixing screw (M3 × 6) of the paper exit plate spring.

7 Slide the reverse roller in the direction of Q.

3 Remove two E-rings (7E) at the both ends of the reverse roller. 4 Remove the gear and the parallel pin (???3 × 10) from the reverse

roller.

5 Remove two E-rings (E7) inside of the gear. 6 Remove two bearings at the both ends of the reverse roller.

12. Paper feed unit (SF-CM15, SF-CM16, option)

This unit had two stages of paper feed section of the SF-2020 (one stage for the SF-CM16). For disassembly and assembly, refer to [5]-(1) Paper feed section.

6 – 27

[7] ADJUSTMENTS

1. Developing section

1-1. Developing doctor clearance adjustment

a. If the clearance between the developing doctor and the MAG

roller is improper, the following trouble may occur.

• Insufficient coy density

• Background copy

• Toner splash

(1) Remove the developing unit from the copier. (2) Loosen four screws (A) which hold plate D fixed. (3) Insert two clearance gauges of 0.6mm into the clearance be-

tween plate D and the MAG roller. <Note> For insertion of the clearance gauges, refer to the

figure below.

(4) With two clearance gauges inserted, gently press plate D and

tighten four screws (A).

(5) Check that the clearances at two points 50 ∼ 80 mm from the

both ends of the developing doctor are within the specified range (0.6 ± 0.03mm).

<Note 1> When inserting the clearance gauges, be careful

not to scratch the plate D and the MAG roller.

<Note 2> When adjusting or checking, be careful not to allow

foreign materials (oil, etc.) to attach to the MAG

roller sleeve. (6) After adjustment, apply screw lock to the four screws (A). * For color developing unit, use the specified value of 0.7±0.03mm

for adjustment.

50mm

30mm

Clearance gauges

0.6mm

0.6 ± 0.03mm

30mm

Plate D

MAG roller

50mm

1-2.

Developing magnet roller main pole position adjustment

a. If the MAG roller main pole position is improper, the following

troubles may occur.

• Insufficient copy density

• Toner splash

(1) Remove the developing unit from the copier. (2) Tie a thread to a needle as shown below. (3) Hold the thread and bring the needle close to the MAG roller. (4) Mark the contact point of the thread on the MAG roller sleeve

surface.

Marking

7 – 1

(5) Measure the distance from the marking position to the bottom

(A) of the developing unit and check that the distance is

17.6mm. If the distance is not as specified above, loosen the MG adjustment plate fixing screw, move the adjustment plate in the arrow directions and perform procedures (3) to (5) again.

17.6mm A

MG adjustment plate

(6) After completion of adjustment, tighten the MG adjustment

plate fixing screw. When tightening, check that the bias terminal is as shown below. After tightening the screw, apply screw lock to it.

2. Optical system

2-1. Adjustment items

1. Lens reference position adjustment

2. No. 4/5 mirror reference position adjustment

3. Vertical copy magnification ratio adjustment

4. Resolution adjustment

5. Horizontal copy magnification ratio adjustment

6. Comparison table of lens values and simulation input values

7. Vertical skew adjustment

8. Horizontal skew adjustment

9. Center shift adjustment

10. Exposure balance adjustment

11. Copy lead edge adjustment

MG adjustment plate fixing screw

MG ad j us t m e nt plate

Bias terminal

7 – 2

2-2. Note for adjustments

1. Only the exposure balance adjustment, the blank lamp adjustment, and the copy lead edge adjustment can be performed individually. For the other adjustments, follow the flowchart below.

1. Mechanical ref erence pos i ti on adj ustm ent ( wi t hout copy i ng)

A. No. 2/3 mirror unit parallelism adjustment

Vertical sk ew c opy adjust m ent - -- Manual adj ustment

B. Check the follo wi ng preset v alues accordi ng to th e l ens focus rank.

Lens reference pos ition adjustment - -- SI M 4 8-01

No. 4/5 mi rror refer ence posi t ion adj ust ment - -- Manual adjustment

2. Adjustment while copying

Image distortion

Vertical skew c opy adjus tment

1. Image distortion,

center shift check

xdr

Horizontal skew copy adjus t ment

Center shift:

Lens center shift ad j u stment

2. Normal (x 1.00), zooming (x 2.00)

resolution (focus)

check

xdr

3. Norm al copy

magnificati on rat io

(vertical, horizontal)

check

xdr

4. Expos ure bal anc e, blank lamp posi ti on,

lead edge vari ati on

check

xdr

END

Resolution (focus) adjustment

Normal: Adjust with the No. 4/5

mirror adjustment screw. Zooming: Adjus t w i th the zoo ming

cam.

Copy magnificat ion rati o adjustment

Vertical copy magnif ic ati on rati o

adjustme nt Horizontal copy magnif i cati on ratio adjustm ent

Exposure balance adjustment Blank lamp position adjustment

Copy lead edge adjustment (Including the void area adjustment.)

7 – 3

2-3. Adjustment of each section

A. Lens reference position adjustment

In this model, the reference value according to each lens characteristics must be entered. With this value, the lens home position is determined.

(1) Execute simulation 48-01

• Perform the following key operation.

—— ——8—

C 0/ 4

———

PSW 1 PSW

" A" is dis played on t he thir d digit of the copy qu antity di splay, and the previously set value or 50 is displayed on the second and the first digits.

Numerals

0/ C

• Substitute the "O – L" value (variation in the distance be-

tween the original and the lens) on the lens value label attached to position B shown in the figure below into the following formula, and input the obtained value.

Be sure to check that the magnification ratio cam is at the home position as shown in the figure below.

B. No. 4/5 mirror reference position adjustment

(1) Remove the external fittings.

B (Len s value label)

50 – {(O – L value) × 5} = Correction reference value

51 50 49

Lens

(2) Loosen two screws (A) which are fixing the No. 4/5 mirror and

the No. 4/5 mirror drive holder to the No. 4/5 mirror holder.

No.4/5 drive rack

Screw A

No.4/5 drive holder

No.4/5 mirror holder

<Example> When the lens value is +1.2;

50 – (1.2 ×5) = 44 (Correction reference value = input value)

7 – 4

(3) Check to confirm the lens value specified on the lens value

label.

(4) Insert a screwdriver into hole (P) in the right rear side (paper

feed side) of the optical base plate, and adjust the adjustment screw. The scale on the zoom base at section Q in the figure below determines the position of the No. 4/5 mirror corresponding to the lens value.

<Example> When the lens value is +1.2, loosen the adjustment

screw and adjust so that the arrow section of the No. 4/5 mirror drive holder points to the zoom base scale at +1.2. Turning the adjustment screw clockwise moves the No. 4/5 mirror drive holer arrow section in the (–) direction, and turning it counterclockwise moves the arrow section in the (+) direction.

C. Vertical copy magnification ratio adjustment

Be sure to check that mirror bases A, B and C are in parallel and that the focus is proper before executing this adjustment. This adjustment must be performed in the following cases.

• When the lens home position sensor (LHPS) is replaced or its

installation position is changed.

• When the lens is replaced.

• When the mirror base is replaced or its installing position is

changed.

• When the main PWB is replaced.

• When the EEPROM inside the main PWB is replaced.

No.4/5 sdjus tment

No. 4/5 mirror drive holder arrow se c tion

Zoom base

(-) direction (+) direction

One sc ale = 1mm

screw (shaded p ortion)

(1) Put a scale on the original table as shown in the figure below.

A4 (11" x 8½") paper

Scale

(When a 100mm scal e is used as the or ig inal.)

Paper f eed direction

1/2mm

mm 1/2mm

Reference Comparison point

(2) Make a normal copy (100%) on an A4 (11" ×81⁄2") paper. (3) Compare the scale image length and the scale length.

100 11 0 120 130

100 110 120 130

JAPAN

110

140

150

Copy

HARDDENCD STAINLESS

Shizuoka

HARDDENCD STAINLESS

Shizuoka

Original scale

7 – 5

(4) Calculate the copy magnification ratio.

Copy magnification ratio =

(5) Check that the obtained copy magnification ratio is within the

specified range (100 ± 0.8%). If it is within the specified range, go to procedure (7). If not, execute simulation 48-1.

Copy image size

Original size × 100%

• Perform the following key operation.

—— ——8—

C 0/ 4

———

PSW 1 PSW

"A" is displayed on the third digit of the copy quantity display, and the previously set value or 50 is displayed on the second and the first digits. (Refer to "D-1. Lens reference position adjustment.")

(6) Perform the magnification ratio adjustment according to the

flowchart below.

(9) Adjust the copy magnification ratio according to the flowchart

shown in (6). (10) Make a copy at 50%. (11) Check that the copy magnification ratio is within the specified

range (100 ±0.9%). If it is in the specified range, the vertical

copy magnification ratio is completed. If not, enter [%] in

simulation 48-1 as follows:

• Perform the following key operation.

—— ——8—

C 0/ 4

———

PSW 1 PSW

"C" is displayed on the third digit of the copy quantity display, and the previously set value or 50 is displayed on the second and the first digits.

Numerals

The copy

size i s shorter

than the origin al

The copy

size is longer

than the origin al

END

(7) Copy the scale at 200%. (8) Check that the copy magnification ratio is within the specified

range (100 ±0.9%). If it is within the specified range, go to procedure (9). If not, enter % key in simulation 48-1 as follows:

YES

<Note> After entering a value, press [PSW]

Enter a value greater than the set val u e

• Perform the following key operation.

—— ——8—

C 0/ 4

———

PSW 1 PSW

"B" is displayed on the third digit of the copy quantity display, and the previously set value of 50 is displayed on the second and the first digits.

0/ C

(12) Adjust the copy magnification ratio according to the flowchart

shown in (6).

D. Resolution adjustment (Focus adjustment)

Normal copy ratio focus adjustment

(1) Check the "O.L value" on the lens value label of the lens unit,

and fit the reference position of No. 4/5 mirror. (Use the No.

4/5 mirror adjustment screw for positioning. Loosen screw A at

this time.)

Lens value label

Numerals

7 – 6

No.4/5 mirror adjustment screw

(-) direction

(+) direction

1scale: 1mm

Example: In the case of O.L value +1.0, this position is the reference position.

(2) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the normal ratio.

(3) If the focus is improper, perform the focus adjustment of the

normal ratio as follows: (3)-1 Make a copy of the test chart on an A4 or 8 1/2″ × 11″ paper. (3)-2 Check the resolution at the four corners and the center of the

copy image. If the resolutions are within the specified range, the adjustment is completed. If not, adjust No. 4/5 mirror adjustment screw. (Loosen screw A at that time.)

(3)-3 If the resolutions are not within the specified range, use the

No. 4/5 adjustment screw to adjust. (Loosen screw A at this time.)

4.5

(Copy)

Check points

2.8

5.0

3.2

5.6

3.6

6.3

7.1

4.0

8.0

9.0

9.1

9.2

9.2 9.2

2 Perform the focus adjustment in the enlargement mode

(200%). (1) Make a copy of the test chart on an A4 or 8 1/2″ × 11″ paper. (2) Check the resolution at the four corners and the center of the

copy image. If the resolutions are within the specified range,

the adjustment is completed. If not, adjust by shifting the rela-

tive position of the zooming can to the drive cam. (3) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the enlargement mode again.

Resolution standards (Unit: lines/mm)

Copy center Corners Normal (100%) 5.0 4.5 Enlargement (200%) 5.0 4.5 Reduction (50%) 3.2 2.8

4.5

(Copy)

Check points

2.8

5.0

3.2

5.6

3.6

6.3

7.1

4.0

8.0

9.0

9.1

9.2

9.2 9.2

Screw A

(4) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the normal ratio again. Resolution standards (Unit: lines/mm)

Copy center Corners Normal (100%) 5.0 4.5 Enlargement (200%) 5.0 4.5 Reduction (50%) 3.2 2.8

Zooming cam

Zooming cam gear

Do not mov e the zoomin g cam gear a t thi s time.

∗

3 When the zooming can position is changed in 2, check the

focus in the normal mode again. If the resolutions are out of the specified range, perform the focus adjustment in the normal mode again.

* Repeat 2 and 3 until the proper focus is obtained in the normal

mode and the enlargement mode (200%).

7 – 7

E. Horizontal copy magnification ratio adjustment

a. This adjustment is performed to meet the displayed magnifica-

tion ratio with the actual one.

b. This adjustment must be performed in the following cases:

• When the main PWB is replaced.

• When the EEPROM in the main PWB is replaced.

• When the mirror motor is replaced.

• When self diag. U2 occurs.

The scanning speed of the mirror base is changed to adjust the horizontal (paper transport direction) copy magnification ratio.

(1) Put a scale on the original table as shown in the figure below,

and execute simulation 48-02. The machine starts warming up and the ready lamp lights up. At the same time, the previously set valu e ( 1 ∼ 99) is displayed. Under this state, make a nor- mal copy and calculate the copy magnification ratio.

(2) Replace the displayed value with the copy magnification ratio

correction rate obtained in (1). (Input value) = (Previously set value) / (Copy magnification ratio correction rate [%]) ×10

(Example) When the previously set value is 25, the input

values of examples 1 and 2 are as follows:

• Example 1: 35 = 25 + (1 × 10)

• Example 2: 15 = 25 + (–1 × 10)

Enter the input value and press the print switch. The value is stored and the ready lamp lights up.

Eg1: Copy A, of which length is shorter than or igi nal

10 20 90 100 110

10 20 30 40 50 60 708090 50 100110

Space

120

130 140

Scale

Blank paper

Scale (Origi nal)

100 110

Eg2: Copy B, of which length

10 20 90 100 110

is longer than or igi nal

(3) Cancel simulation 48-02.

Note: Input correction can be made in the range of 1 – 99

(simulation set range).

7 – 8

F. Comparison table of lens values and simulation input values

Lens

display

value

+4.0 30 70 70 +3.9 31 69 69 +3.8 31 69 69 +3.7 32 68 68 +3.6 32 68 68 +3.5 33 67 67 +3.4 33 67 67 +3.3 34 66 66 +3.2 34 66 66 +3.1 35 65 65 +3.0 35 65 65 +2.9 36 64 64 +2.8 36 64 64 +2.7 37 63 63 +2.6 37 63 63 +2.5 38 62 62 +2.4 38 62 62 +2.3 39 61 61 +2.2 39 61 61 +2.1 40 60 60 +2.0 40 60 60 +1.9 41 59 59 +1.8 41 59 59 +1.7 42 58 58 +1.6 42 58 58 +1.5 43 57 57 +1.4 43 57 57 +1.3 44 56 56 +1.2 44 56 56 +1.1 45 55 55 +1.0 45 55 55 +0.9 46 54 54 +0.8 46 54 54 +0.7 47 53 53 +0.6 47 53 53 +0.5 43 52 52 +0.4 48 52 52 +0.3 49 51 51 +0.2 49 51 51 +0.1 50 50 50

050 50 50 –0.1 50 50 50 –0.2 51 49 49 –0.3 51 49 49 –0.4 52 48 48 –0.5 52 48 48 –0.6 53 47 47 –0.7 53 47 47

Sim 48-01

Zoom correction

(Enlargement)

Sim 48-01 — % Sim 48-01 — %

Zoom correction

(Reduction)

—

Lens

display

value

–0.8 54 46 46 –0.9 54 46 46 –1.0 55 45 45 –1.1 55 45 45 –1.2 56 44 44 –1.3 56 44 44 –1.4 57 43 43 –1.5 57 43 43 –1.6 58 42 42 –1.7 58 42 42 –1.8 59 41 41 –1.9 59 41 41 –2.0 60 40 40 –2.1 60 40 40 –2.2 61 39 39 –2.3 61 39 39 –2.4 62 38 38 –2.5 62 38 38 –2.6 63 37 37 –2.7 63 37 37 –2.8 64 36 36 –2.9 64 36 36 –3.0 65 35 35 –3.1 65 35 35 –3.2 66 34 34 –3.3 66 34 34 –3.4 67 33 33 –3.5 67 33 33 –3.6 68 32 32 –3.7 68 32 32 –3.8 69 31 31 –3.9 69 31 31 –4.0 70 30 30

Sim 48-01

Zoom correction

(Enlargement)

Sim 48-01 — % Sim 48-01 — %

Zoom correction

(Reduction)

—

7 – 9

G. Vertical skew adjustment

a. This adjustment is performed when a skew copy is made as

shown below or when a part of the mirror base drive wire or the No. 1/2 mirror base is replaced.

Document Copy

(1) Put an A3 (11" ×17") white paper on the original glass neatly to

the glass holding plate and the front frame side as shown below.

(4) Loosen the fixing screw of the rear frame side mirror base

drive pulley. When La > Lb, rotate the rear frame side mirror base drive pulley in the arrow direction A. (Do not move the flange and the mirror base drive pulley shaft.) When La < Lb, rotate the rear frame side mirror base drive pulley in the arrow direction B. (Do not move the flange and the mirror base drive pulley shaft.)

Mirr or base drive pully (Rotate)

A3-size or 11" x 17" blank paperGlass retaining plate

Apply paper front end to glass retaining plate

(2) With the original cover open, make a normal (100%) copy on

an A3 (11" ×17") white paper.

(3) Measure the width of the black background at the front side

and the rear side.

Align paper s i de ed ge with front frame

Lead edge black background width La Rear edge black background width Lb

Paper feed direction

La Lb

Shaft (Do not rotate)

Pulley fixin g screw (Set screw)

(5) Tighten the fixing screw of the mirror base drive pulley. (6) Perform proced ures (1) ∼ (3). (7) If La=Lb is not satisfied, perform procedures (4) and (5). (If

La=Lb, the adjustment is completed.) Repeat procedures (1) ∼ (6) until La=Lb is satisfied.

H. Horizontal skew adjustment

a. This adjustment is performed in the following cases:

• When a horizontal skew is made.

• When the mirror base drive wire is replaced or its installing

position is changed.

• When the No. 1/2 mirror base is replaced or its installing

position is changed.

• When the No. 2/3 mirror base rail is replaced or its installing

position is changed.

Document Copy

7 – 10

(1) Make an original for adjustment.

Draw parallel lines at 10cm from the both edges of an A3 or 11" × 17" white paper. (Be careful to draw precisely parallel lines.)

Parallel line Parallel line

10mm

Adjustment procedure (1)

When La>Lb (Lc<Ld): Rotate to increase the height of the front

frame side of the No. 4/5 mirror base unit.

When La<Lb (Lc>Ld): Rotate to decrease the height of the front

frame side of the No. 4/5 mirror base unit. Open the front cabinet, insert a screwdriver as shown below, and turn the eccentric screw to adjust the height of the No. 4/5 mirror base.

No. 4/5 mirror ba se

10mm

Blank paper

(2) Set the adjustment original made in (1) as shown below.

Glass holding plate

Fit the original edge with the

Adjustment original

lass holding plate edge

(3) Make a normal (100%) copy on an A3 or 11" × 17" white

paper.

(4) Measure the distances at four points as shown below:

Hole for screwdriver

<Note> When turning the eccentric screw, remember how much it

is rotated from the original position. When the eccentric screw is turned 36 degrees, the height of the front frame side of the No. 4/5 mirror base is increased or decreased by 2mm and the difference (La – Lb) is varied by 4mm.

If the above adjustment is not effective, then follow the Adjustment procedure (2) .

Adjustment procedure (2)

1 Move the mirror base rail B up and down in the arrow directions

to adjust.

• When La > Lb, shift the mirror base B rail upward by half of

the difference of La – Lb.

• When La < Lb, shift the mirror base B rail downward by half of

the difference of La – Lb.

Paper discharge direction

Mirror base rail handle

Loosen Loosen

Lb Ld

1 scale = 1mm

7 – 11

(Example) When La=12mm and Lb=9mm, shift the paper exit side

mirror base B rail upward by 1.5mm.

• When Lc > Ld, shift the mirror base B rail downward by half of

the difference of Lc – Ld.

• When Lc < Ld, shift the mirror base B rail upward by half of

the difference of Lc – Ld.

(When moving the mirror base rail, hold the mirror base rail handle.)

2 Adjust according to procedure (1) so that La=Lb and Lc=Ld are

satisfied.

3 After completion of the adjustment, turn the mirror base drive

pulley manually to full scan mirror base A and mirror base B, and check that the mirror bases are not brought into contact with each other.

(Note) When the mirror bases are moved extremely, they

may be brought into contact. Carefully avoid it.

I. Center shift adjustment

a. This adjustment must be performed in the following cases:

• The copy (100%) center is shifted from the original center

more than 2mm.

• When any part of the lens rail or the lens unit is replaced.

(1) make a test chart for center position adjustment. (Refer to the

figure below.)

(5) Remove the document reference plate and the right upper side

cabinet, and remove the document table glass.

Document reference plate

Document table glass

Right upper side cabi net

(6) Loosen the three fixing screws of the optical system unit and

slide the optical system unit to adjust the center position.

Origina l center

(Original)

Draw a line at the center Copy paper

(A4 or 11" x 8½")

Paper transport direction

(2) Set the test chart for the center position adjustment to the

document reference line, and make a normal (100%) copy with an A4 or 11" × 81⁄2" paper.

(3) Check that the copied image line is at the center of the copy

paper.

2.0m m or less

(Cop y A )

Shift

2.0m m or less

(Cop y B )

Shift

Copy image

Copy paper fold

Copy image

(Paper feed direction)

(4) If the error of the copy image line is within the specified range

(0±2.0mm), the adjustment is not required. If not, perform the following procedures.

Optical system

unit

Loosen the screws (3pcs.)

Lens b e aring sid e

(7) After adjustment, set the removed parts in the reversed se-

quence. make a copy of the test chart to check that the center shift is within the specified range (0 ±2.0mm). If the center shift is within the specified range, the adjustment is completed. If not, repeat procedures (2) – (7) until it is within the specified range.

Lens body side

2mm or less

(Copy 1) Move lens is the A direction

2mm

(Copy 2)

or less

Move lens is the B direction

Copy pape r cent er

J. Exposure balance adjustment

a. This adjustment is to provide uniform exposure, and must be

performed in the following cases:

• When the reflector is replaced.

• When the copy lamp is replaced.

• When the exposure adjustment plate is replaced.

(1) Set a half tone paper on the original table and make a half

tone copy at 100%.

(2) If the exposure of the half tone copy is uniform, the adjustment

is not required. If it is varied as shown below, perform the following procedures.

Exposure

Paper discharge direction

insufficient

7 – 12

Half-tone copy

(3) Remove the original reference plate and the right upper side

cabinet, and remove the original table glass.

(4) Move the exposure plates a, b, c, and d in arrows directions A

and B to adjust exposure. Moving the plates in the direction of arrow A makes the copy darker, and moving in the direction of arrow B makes the copy lighter.

Exposure adjustment

plate b Exposure adjustment plate a

Exposure adjustment plate c

Exposure adjustment plate d

(The value displayed before pressing the % key is stored in the memory by pressing the zoom up key.)

Display section: During execution of the simulation, the RRC-A value is displayed on the copy quantity display.

Top digit: Displays A, b, C, d. Lower two digits: Displays RRC-A value, RRC-B value, or void

area value.

(1) Put a scale on the original table.

(Example) If the half tone copy is as shown below, move the

exposure adjustment plate a in the direction of arrow B to balance exposure.

Exposure

Paper

insufficient

discharge direction

Half-tone copy

(5) After adjustment, set the original table glass. Make a copy to

check uniformity of copy density. If the copy exposure is not uniform, repeat procedures (1) – (5).

K. Copy lead edge adjustment

a. This adjustment is performed to provide the maximum effective

copy size and the proper void area, improving separation in the photoconductor section and the fusing section and reducing dirt in the fusing section pawls.

b. This adjustment must be performed in the following cases.

• When the mirror home position sensor (MHPS) is replaced or

its installing position is changed.

• When the mirror base is replaced.

• When the resist roller and the resist roller clutch are replaced.

• When the main control PWB is replaced.

• When the ADF is installed or disassembled.

* The copy lead edge adjustment is performed with simulation 50-

01 and 50-02. When the copy lead edge adjustment is made with simulation 5001: In this simulation, the following keys and the display section have special functions.

Reduction key: Makes the magnification ratio 50%. Enlargement key: Makes the magnification ratio 200%.

• % key:

Pressing the % key changes A → b → d → A → sequentially, and the set value corresponding to the display is displayed on the copy quantity display. A: RRC-A set value b: RRC-B set value C: Lead edge void amount set value d: Rear edge void amount set value

Scale

(2) Press keys as follows:

C → ë → 0/◊ → ë → 5 → 0/◊ → PSW → 1 → PSW

Simulation 50-01 is executed and the ready lamp lights up. The previously set value (1 – 99) is displayed. (RRC-A content)

(3) Set values A and B to zero, and make copies at 100% and

200%.

• 0/◊ → 0/◊ → % key →

0/◊ → 0/◊ → PSW (A copy at 100% is made.)

• Enlargement key → (Lens shift, ready) → PSW (A copy at

200% is made.)

7 – 13

(4) Measure the distance between the copy paper lead edge and

the copy image lead edge in each copy. Obtain RRC-A and RRC-B values from the following formulas.

If the RRC-A preset value is not proper, the lead edge position varies in each magnification ratio. The RRC-B is to adjust the RRC ON timing for fitting the drum image lead edge and the transfer paper lead edge.

(8) Put a scale and an A3 (11" × 17") white paper on the original

table as shown below.

Scale

2010 30 40 60

10 20 30

End of scale image End of scale image

Full-size(100%) copy Enlarged(200%) copy

• La: Led edge shift at 200% (mm)

• L2: Lead edge shift at 1005 (mm)

• RRC-A = 6.151 × (L1 – L2)

• RRC-B = 15.385 × L2 – 7.692 × L1

(5) Enter the RRC-A and RRC-B values obtained from the above

formulas with the 10 digit key pad in the same manner as procedure (3).

(6) Make copies at 200%, 100%, and 50%, and check variations in

the magnification ratios. (About 1.0mm) If there is a considerable variation, repeat from procedure (3).

(7) Make a normal copy and check that the lead edge image loss

is within the range of 0 ∼ 4mm. If the im age loss is outsid e the above range, change the RRC-B value and adjust again until the image loss is within the above range.

102030 40 50 60 708090 50 100 110

120

130140

50mm

A3(11" x 17") Blank paper

(9) Press the zoom key to display "C" in the lowest digit of the

magnification ratio display. (Void amount adjustment mode)

(10) Make a copy and enter the normal copy lead edge void area

adjustment set value so that the black background edge comes to the scale 1 – 3mm of the copy image scale.

→ → PSW With the above key operation, a copy is made and the adjust-

ment value is inputted. When the adjustment value is changed by 1, the void area is changed by about 0.13mm. The greater the adjustment value is, the greater the void amount is.

End void area 1~3mm

Scale image

10 20 3 0 40

10 20 30 40

Image loss 0~4mm

60 70

Full-size(100%) copy

Note: The above image loss range is effective only for

simulation 50-01, and is not the final one.

Solid edge

Paper end

Full-size(100%) copy

7 – 14

(11) Make a normal copy and check that the image loss and the

void amount are within the specified range.

(Specified range)

• Image loss: 0 ∼ 4mm

• Void amount: 1 ∼ 3mm

Void area 0~3mm

Paper end

10 20 30 40

Solid edge

Image loss 0~4mm

(12) Press the clear key and cancel simulation 50-01.

Note: When the RRC-A and RRC-B values are changed

in simulation 50-01, be sure to adjust the copy lead edge void area.

When adjustment is made with simulation 50-02: <Note> The keys and display functions are the same as simulation

50-01. In simulation 50-02, L1 and L2 values can be directly set. It is easy and simple. The void area adjustment is also the same as simulation 50-01.

Scale image

Full-size(100%) copy

[Adjustment procedure]

(1) Put a scale on the original table. (2) C → P → 0/◊ → P → 5 →

0/◊ → PSW → 2 → PSW

With the above key operation, simulation50-02 is performed and the machine starts warming up.

(3) The lower two digits of L1 value is displayed on the copy

quantity display. The top digit is for data identification.

• L1 : Lead edge shift at 200% (|||mm, 3 digits)

• L2 : Lead edge shift at 100% (✕✕✕mm, 3 digits)

Example of display

• For 42.5mm, the display is 2 5 .

(4) Use the % key and the 10 digit key pad to set A and b values

to zero. Make copies at 100% and 200%.

• 0/◊ → 0/◊ → 0/◊ → % key → 0/◊

→ 0/◊ → 0/◊ → PSW (A copy at 100% is made.)

• Enlargement key → (Lens shift, ready) → PSW (A copy

at 200% is made.)

(5) Measure the distance between the copy paper lead edge and

the copy image lead edge in each copy. Enter L1 and L2 values with the zoom key and the 10 digit key pad. With this operation, RRC-A and RRC-B values in simulation 50-01 are automatically calculated and stored. Input procedure

(Example) When L1 = 24.5 mm and L2 = 15.0mm: Check that the lowest digit of the magnification ratio display is "A," and perform the following key operation.

2 → 4 → 5 ("45" is displayed on the copy quantity display.)

→ % key → 1 → 5 → 0 ("50" is displayed.) → PSW

(6) After this, check shift and image loss, and void amount in each

copy similarly to simulation 50-01.

2-4. Original detecting section

A. Original detecting arm unit adjustment

OC switch ON timing adjustment Execute simulation 40-01. (C → P → 0 → P → 4 → PSW → 1

→ PSW)

• Slowly tilt down the original detecting arm unit and loosen the

original cover switch actuator adjustment screw so that the auto paper selection display lamp turns off when the height from the table glass to the arm unit top is 36.5 ±0.5mm. Then slide the actuator to adjust. (If the original cover ON timing is shifted, the original detecting function may malfunction.)

Original detecting arm unit

36.5 0.5

Glass

Original cover switch actuat or

Actuator adjustment screw

7 – 15

B. Original detecting level adjustment

(Original detecting judgement level input)

This adjustment is to set the reference value for judgement of presence or absence of an original and to monitor the sensor status.

1 C → ë → 0 → ë → 4 → 1 →

PSW → 2 → PSW At that time, the ready lamp lights up and "1" is displayed on

the copy quantity display.

2 With the original cover open without original, press the PRINT

button. (The sensor level without original is read.) The copy quantity display is shifted from 1 to 2.

3 Place a transfer paper of A3 (11″ × 17″) on the original table,

and press the PRINT switch with the original cover open. (The sensor level with an original is read and the judgement level of original presence or absence is stored.)

* The photo sensors are arranged as follows:

Reception

shaft

1——— 2B5—— 3A4A4LT 4 B5R — — 5 A4R A4R LTR 6B4B4LG 7A3A317″

The manual paper feed tray selection lamp is used to check open/close of the original cover. It lights up when the original cover is open, and goes off when closed.

When the original cover close is detected, all the original size display lamps go off.

Japan

AB series

1234

AB seriesEXinch series

567

<Reference> Detection level setting principle The sensor level with an original and that without original are read

and the average level (the center value) is stored as the judgement level.

Sensor level wi t hout

Sensor level

original Judgement l evel

(Center value) Sensor level with

original

The photo sensor detection check is made by SIM 41-01. (After inputting the original detecting level, the mode is automatically changed to the check mode.)

Photo sensor check procedure Key operation: C → P → 0 → P → 4 → 1 → PSW → 1 → PSW At that time, all the original size display lamps and the manual tray

selection lamps are lighted. By interrupting the light emitting section of the original size detection LED, the original size lamps are turned off.

(Light reception level and judgement level check)

1 Light reception level display mode

C → ë → 0 → ë → 4 → 1 → PSW → 3 → PSW

• The light reception level during execution of the simulation

is displayed on the copy quantity display.

• After execution of the simulation, enter the number cor-

responding to each sensor with the 10-key pad. The original size display lamp lights up to allow to check the light reception level of the sensor.

• The manual paper feed tray selection lamp is used to check

the original cover open/close. The lamp lights up when the original cover is open, and goes off when closed. In the case of 1, when the original cover is closed, the sensor level is fixed to the previous value.

2 Setting level display mode

C → ë → 0 → ë → 4 → 1 → PSW → 3 → PSW → Magnification ratio auto select key

• With the above key operation, the pause lamp lights up.

• Each sensor level set with SIM 41-02 is displayed on the

copy quantity display.

• After execution of this simulation, enter the number cor-

responding to each sensor with the 10-key pad. The original size display lamp lights up to allow to check the light reception level of the sensor.

7 – 16

2-5. Copy density adjustment A. When the copy density adjustment is required:

The copy density adjustment must be performed in the following cases:

• When maintenance is performed.

• When the output current of the main charger and the transfer

charger, the separation charger bias voltage, or the grid voltage is adjusted. (When the charger unit or the high voltage unit is replaced.)

• When the developing bias is adjusted.

• When any part of the AC PWB unit is replaced.

• When the AE sensor is replaced.

• When the copy lamp is replaced.

• When the optical unit is replaced.

• When the optical unit is disassembled, repaired, or adjusted.

• When exposure adjustment plate is moved.

• When the drum is replaced.

• When the main PWB is replaced.

B. Note for copy density adjustment

• The charger output and the developing bias voltage are properly

adjusted in advance.

• The half-tone uniformity is within the limit sample range.

• Sim. 44-01 is set to "7."

(2) Drum sensitivity setting

(1) Execute Sim. 26-07, and check that the top digit of the 9-digit

drum number printed on the flange in front of the drum is displaye d on the copy quantity disp lay.

(2) If the displayed number is different from the drum number,

change the setting with the 10 digit key pad.

(Note) When the 10 digit key pad is used to enter a number, the

display shows only in the range of 1 ∼ 3.

(3) AE sensor level adjustment

(1) Execute Si m. 47.

(The mirror base starts scanning and stops at the AE sensor

level measurement position.) (2) Put several sheets of A3 (11" x 17") paper on the original table. (3) Press the PS W again, and the copy lamp will l ight up and the

sensor output will be displayed on the copy q uantity display. This

output level is stored.

C. Copy density adjustment procedure

(1) Set the automatic exposure l evel to "3."

(When t he mode sele ct key is pres sed for 5 sec in the photo mo de, the mode is switched to the automatic exposure mode. In this mode, press the exposure select key to set the exposure level to "3.")

COPY DENSIty

AUTO

MANUAL PHOTO

LIGHT DARK

Put several sheets of A3 (1" x 17") paper

7 – 17

(4) Test chart setting

(1) Put several sheets of white paper (Sharp specified paper) of

about 120mm wid e and ab out 420mm long to t he center r eference.

(2) Put the test chart (UKOG-0162FCZZ) as shown below:

UKOG-0162FCZZ

56789

(2) Make a copy.

Check that "6" of the test chart is slightly displayed.

Not copied Slightly copied

<When t oo light> Make the value displayed on the copy quantity

display smaller.

<When t oo dark> Make the value displayed on the copy quantity

display greater.

* The range of set values is 1 ∼ 99. * Ent ry nu mber "1" cor resp onds t o a cha nge o f

about 0.33V in the copy lamp voltage.

(3) Make a copy.

When the copy exposure is within the exposure limit sample

range, p r es s the DARK ex posure key t o s et to exposu r e " 5." ("b"

is dis played on the copy quantity d isplay.)

COPY DENSIty

AUTO

MANUAL PHOTO

Test ch ar t comparison table

UKOG-0162FCZZ DENSITY No.

UKOG-0089CSZZ DENSITY No.

KODAK GRAY SCALE

12345678910W

0.1 0.2 0.3 0.5 1.9 0

123419A

SHARP CORPORATION

MODE IN JAPAN

(5) Manual exp osure (ME) mode adjust m ent

1) Normal mode ex posure adjustment

(1) Execute Sim. 46-01.

Exposure "1" in the manual exposure mode is displayed on the exposu re display. "0" of value A is first displayed on the coy quantity display. After sensing the drum mark, the two-digit number corresponding to the sensed mark number is displayed.

COPY DENSIty

AUTO

MANUAL

PHOTO

31245

LIGHT DARK

31245

LIGHT DARK

(4) Make a copy.

Check that "2" of the test chart is clearly copied. <When t oo light> Make the value displayed on the copy quantity

display smaller.

<When t oo dark> Make the value displayed on the copy quantity

display greater.

23456

789

Not copied Copied

2) Toner save mode adj ustment

(1) Press the exposure select key to set to the toner save mode.

The manual mode lamp and the photo mode lamp are simul-

taneou sly lig hte d and ex posu re " 1" is dis play ed on the ex posu re

display section. "C" is displayed on the copy quantity display .

COPY DENSIty

AUTO

MANUAL PHOTO

7 – 18

312

LIGHT DARK

(2) Perform the same procedures of (2) through (4) in "1) Normal

mode exposure adjustment."

3) Photo mode exposure adjustment

(1) Press the exposure select key to set to the photo mode.

The photo mode lamp is lighted and exposure "1" is displayed on the exposure displ ay section. " E" is displayed on the copy quantity display.

(4) Make a copy.

Check that "3" of the test chart is slightly copied.

Slightly copiedNot copied

COPY DENSIty

AUTO

MANUAL PHOTO

1245

LIGHT DARK

(2) Perform the same procedures of (2) through (4) in "1) Normal

mode exposure adjustment."

(6) Automat ic exposure mode adj ustment

1) Automati c exposure (normal mode) adjustment

(1) Press the exposu re sel ect ke y to s et to th e auto matic exposu re

mode (normal mode). The automatic exposure mode lamp is lit and exposure "1" is displayed on the exposure display section. "C" is displayed on the copy quantity display .

COPY DENSIty

AUTO MANUAL PHOTO

<When t oo light> Make the value displayed on the copy quantity

display smaller.

<When t oo dark> Make the value displayed on the copy quantity

display greater.

2) Automatic exposure (toner save mode) adjustment

(1) Press the exposu re sel ect ke y to s et to th e auto matic exposu re

mode (t on er sa ve mode).

The au tomatic ex posure mo de lamp an d the phot o mode lam p

are lit and exposure "1" is displayed on the exposure display

section. "1" is displayed on the c opy quant ity display.

COPY DENSIty

AUTO

MANUAL PHOTO

312 4

LIGHT DA RK

(2) Perform the same procedures of (2) through (4) in "1) Normal

mode exposure adjustment."

3124

LIGHT DARK

(2) Check that "0" is displayed on the copy quantity display. (3) Press th e DARK exposure key to set to exposure "5." ("H" is

displayed on th e copy quantity display.)

COPY DENSIty

AUTO

MANUAL PHOTO

12 45

LIGHT DARK

7 – 19

Copy density adjustment

Item Content Automatic exposure level initial setting 3 (Standard level) TSM mode initial setting 5 (Standard mode) AE sensor level adjustment Execution of Sim. 47 Drum sensitivity setting Execution of Sim. 26-07 Test chart setting Test chart comparison table

UKOG-0162FCZZ DENSITY No.

Copy density adjustment

Developing bias output voltage adjustment 200V (Manual exposure 1)

Manual exposure copy density adjustment Execution of Sim. 46-01

ME1

UKOG-0089CSZZ DENSITY No.

KODAK GRAY SCALE

Execution of Sim. 8-01

0.1 0.2 0.3 0.5 1.9 0

12345678910 W

123419A

SHARP CORPORATION

MADE IN JAPAN

456789

W23

ME5

TSM mode copy density adjustment

TS1

TS5

Photo mode copy density adjustment

PE1

Not copied Slightly copied

345678

Not copied Copied

1 10

3456

789

Not copied Slightly copied

234

5678

Not copi e d Copied

1 10 W

456789

PE5

Not copied Slightly copied

1 10 W2

3456789

Not copied Copied

7 – 20

Item Content

Automatic exposure copy density adjustment Enter "0" with the 10 digit key pad.

Normal mode AE1

AE5

3456

Not copied Slightly copied

TSM mode AE1 (TS)

AE5 (TS)

Enter "0" with the 10 digit key pad.

345678

Not copied Slightly copied

2-6. Process section adjustment A. Blank lamp (BL) position adjustment

1 Check that the center shift is within 0.2mm. (If the center shift

exceeds 0.2mm, adjust the center shift.)

2 Set a white original of A3 (11" x 17"), and make a reduction copy

(x 0.64) on an A3 paper (11" x 17") with the original cover open.

3 Measure the black background sizes on both ends, and slide the

blank lamp unit back and forth to adjust so that the size difference is within 1 mm.

IA-B I 1mm

B. High voltage output balance adjustment

This model employs the one transformer system where the output power is common to the charging charger (MC) and the transfer charge r (TC). The feed back curr ent fro m the tran sfer ch arger (TC) is const ant-curr ent controlled and outputted for charging. For the output ad justment o f each high vo ltage, follow the proced ur e s below.

Transfer charger (T C )

•

Output adjustment

Main charger (MC)

•

Grid voltage

Developing (BS)

Bias voltage

•

7 – 21

A. Use of special m easurement tools

• Tool: UKOGE0043CS01 (Digital multi meter)

• Electrode sheet (UKOG-0110FCZZ)

UK0G-0110FCZZ

UKOG-0110FCZZ

5 Attach the process unit to the copier. (Attach so that the electrode

sheet lead wire extends from the developing unit side.)

6 Clean the transfer charger wire, and attach the transfer/separation

charger unit to the copier. (Do not install the main charger unit.)

Adjustment

output

Sim

TC current 08-02

Adjustment

range –41.0

±4.0 µA

F/R

difference

Tester

range

7.0 µA DC1000 µA

Standard (A)

–750 ±5V MC grid voltage

44-11

Photo (b)

–500 ±5V

— DC1000V

TS (c)

–650 ±5V DV bias voltage 08-01 –200±5V — DC1000V

Electr ode sheet harness (DHAI-0304FC ZZ)

(Microswitch) (QSW-M0118FCZZ)

Orange

PHOG-0007FCZZ

QTIPH0017FCZZ

(Wiring of secti onA)

300KΩ x 2

White

(VRN-RT2EK304F)

Orange

White

Blue Black

Black

White Red

Blue

Green

(QCLIZ0005FCZZ)

Blue

(QCLIZ0006FCZZ)

Black

(QCLIZ0010FCZZ)

Yellow

(QCLIZ0004FCZZ)

Red

(QCLIZ0002FCZZ)

C. Transfer charger output check

1) Transfer charger c urr ent adjustment

1 Remove the developing unit, the transfer/separation charger unit,

and the main charger unit from the copier.

2 Remove the process unit from the copier.

When removing (attaching) the process unit from (to) the copier, do not hold the toner transport pipe.

3 Remove the photoconductor drum from the process unit, and at-

tach the electrode sheet by using rubber ring and tape.

4 Attach the photoconductor drum with the electrode sheet attached

to it to the process unit.

7 Connect the electrode sheet and the digital multi meter (or an

ammeter). Manually turn on the door switch.

Green clip

Copier chassis (Uncoated section)

Digital multi meter

Yellow clip Black clip

Black

2 20

(DCmA)

200

Blue clip

Orange

White

Blue Red

Red clip

Orange

(Microswitch)

(UKOGE0043FC01)

(Note) Check that the black clip is firmly grounded to the chassis.

When the UKOGE0043CS01 is used: Control 1: Set to "2" of DCmA. Red clip: Connect to ⊕. Blue clip: Connect to - . When a DC ammeter is used: Red clip: Connect to - of the DC ammeter. Blue clip: Connect to ⊕ of the DC ammeter.

8 Transfer charger output current check and adjustment

a. Turn on th e main switch and execute simula tion 8 -02. (M THV

is turned on for 30 sec.)

b. Adjust VR102 (MTHV output adjustment control) so that the

output current of MTHV is –41 ±4.0 µA.

7 – 22

9 Check the drum current in the front frame side and the rear frame

side. Difference between the front frame side current and the rear frame side current must be within 7.0 uA.

a. Turn on th e main switch and execute simula tion 8 -02. (M THV

is turned on for about 30 sec.)

b. Measure the drum current in the front frame side and in the

rear fram e side.

• When the microswitch is OFF: The drum current in the front

frame side is displayed.

• When the microswitch is ON: The drum current in the rear

frame side is displayed.

(OFF)

N/C N/O COM

c. Check that the difference between the front frame current and

the rear frame current is within 7.0 µA. If the difference exceeds 7.0 µA, the charger unit is abnormal. Replace the charger unit in that case.

N/C N/O COM

(ON)

2) Charging grid voltage adjustment

Before this adjustment, check that the photoconductor drum, and developing unit, and the charger (MC/TC) units are attached. (Measurement and adjust m ent at the high voltage PWB check point)

1 Remove the rear cabinet. 2 Set the digital multi meter range to DCV, and connect to the grid

voltage output check pin (GB).

3 Turn on the copier power and execute simulation 44-11.

4 Select the standard mode (A) with the magnification ratio display

key on the operation panel. (The mode is displayed on the copy

quantity display.) Execution of simulation 44-11 Select the standard mode (A) with the magnification ratio select key. (Reference)

Display Mode

A Standard –750 ±5V b Photo –500 ±5V C TS –650 ±5V d GB patch –410V → GB is not adjustable.

5 Use the 10-key pad to adjust so that the measurement value by

the tester in the standard mode (A) is –750 ±5V. (Input value 1

corresponds to 5V.)

* For the voltage check, enter the value with the 10-key pad and

press th e PRINT button to st o r e it, an d press the PRINT but t on agai n and measure the voltage with the tester while copying.

6 Adjust similarly in the photo mode (b), and in the toner save mode

(C). Check th e GP patch (d) a fter adju stment of st andard (A), photo (b)

and TS (c).

• Grid voltage adjustment

(Sim 44-11)

Display Mode Grid

A Standard –750±5V 48 b Photo –500±5V 46 C TS –650±5V 46 d GB patch –410V 41

Input value

(Standard)

* 1

(Input value 1 corresponds to 5V.)

d (GB) is fixed.

• Grid voltage check

Grid voltage

Sim No. Mode * Drum marking number: 1 * Drum marking number: 2

8-2 Standard –740 –770 8-3 Photo –480 –480 8-4 TS –630 –650

* Drum marking number 1 = SHARP

Drum marking number 2 = Mitsubishi

* Th is mo del pe rfo rms th e p roces s cor rect ion acco rdin g to t he n um-

ber of drum mark(s). With Sim 8, the grid voltage after correction can be chec ked.

3) Developin g bi as ( B S) vo lt age adjustment

The deve loping bi as voltage is measured and adjusted wit h the check pin (DV BIAS) on the high voltage PWB and the control knob (VR301). In adv ance to this adju stment, check t hat the photocon ductor d rum, the dev eloping unit, an d the charger (MC/ TC) unit s are installed.

1 Remove the rear cover. 2 Set the digital multi meter range to DCV, and connect it to the

developing bias output check pin (DV BIAS).

3 Turn on the copier power, and execute simulation 8-01. 4 During execution of the simulation, check that the developing bias

output monitor voltage is –200 ±5V. If the voltage is outside the

range, adjust with the control knob (VR301).

7 – 23

[8] SIMULATION

1. Outline

This model is equipped with the simulations feature which allows the follow ing operations wi th the keys on the op eration panel:

1) Adjustments

2) Sett in g of sp ec ific ations and fun ctions

3) Resetting trouble codes

4) Checking operations

2. Purpose

The pu rpose of the s imulati ons feat ure is t o imp rove serv iceabili ty in repair s an d adjustmen ts. Since the mechanical adjustments can be performed electrically, the above p urpose i s achieved with lo w costs.

3. Opera tin g pr oc edu r e

Simulations operating procedure

Start

Press the clear key

Press the interruption key

Press the zero key

Press the interruption key

All lamps and indicators on the operation panel go off. Ready for entry of t he main test command numbe r

Enter the main test command number with numeric keys

The set adjustment value or the counter value is displayed on the copy quant ity display

To change the set adjustment value or the counter value, enter a n ew value with numeri c keys

The entered value is displayed on the copy quantity display

Press the print key

The new set value is stored

Is there a sub code?

Press the print key

Is the test

command for operation check?

Operations according to the simulations are performed

Do you perform anot he r simulations?

Press the cle a r ke y

YES

Press the print key

"00" blinks on the copy quantit y displ ay. Ready f o r entry of the sub code.

Enter t he sub code with numeric keys

Press the prin t key

YES

Is the main code same?

The ma in simulat ions number is displayed on the copy quantity display

Is the sub code display?

Enter a new m ain code

The main code is display on the copy quantity display

YES

Press the clear key

All the lamps and indicators on the operation panel go off. Ready for entry of the main simulations number

Press the clear key

End

8 – 1

4. List of simulati on s

Main code

Sub

code

01 Mirror scanning 02 Optical system sensor check

03 Lens operation check 04 Lens operation aging 01 ADF aging 02 ADF sensor check

ADF individual load operation check (Paper feed

motor forward rotation) ADF individual load operation check (Paper feed

10 — Toner motor aging 14 — Trouble cancel (Excluding U2 trouble) 15 — Waste toner full (blinking) cancel 16 — U2 trouble cancel 20 — Maintenance counter clear 21 01 Maintenance cycle setting

motor reverse rotation) ADF individual load operation check (Transport

motor forward rotation) ADF individual load operation check (Transport

motor reverse rotation) ADF individual load operation check (Original

stopper solenoid ON)

02 Sorter sensor check

Sorter individual load operation check (Transport

motor) 04 Sorter individual load operation check (Bin motor) 05 Sorter individual load operation check (Buzzer) 01 Operation panel display check 02 Heater lamp check 03 Copy lamp check 04 DL lighting check 05 BL lighting check

Transport system load operation (Clutch/ 01

solenoid) 02 Paper feed motor operation check (SF-2118 only) 01 Warm-up time display and aging 04 Warm-up omitting 06 Intermittent aging 08 Warm-up time display 01 Developing bias output 02 Main/transfer charger output/grid check (ME) 03 Main/transfer charger output/grid check (PE) 04 Main/transfer charger output/grid check (T/S) 07 Separation charger output 02 ADU sensor check 03 ADU rear end plate aging 04 ADU matching disc aging 05 Gate solenoid operation check

ADU individual load operation (Transport motor 06

paper feed rotation)

ADU individual load operation (Transport motor 07

paper feed rotation + pick-up clutch)

ADU individual load operation (Transport motor 08

paper feed rotation + paper feed clutch)

Content

Main code

Sub

code

01 Maintenance counter display 02 Maintenance preset counter display 03 JAM memory display

30 42 — Developer

43 01 Fusing temperature setting

46 01 Exposure adjustment 47 —

50 51 02 Resist amount adjustment

54 03 Take-out buzzer setting

04 Total JAM counter display 05 Total counter display 06 DV counter display 07 DV preset counter display 08 ADF counter display 01 JAM memory/total JAM counter clear 04 ADF counter clear 01 Drive system check 02 Automatic developer adjustment 01 Option setting (ADF shadow erase setting) 05 Counter mode setting 06 Destination setting 07 Drum sensitivity setting 10 AE document density setting 13 Warm-up mode setting 20 Rear edge void setting 01 Copier sensor check (paper sense) 02 Tray size switch state display

01 Process control operation setting 05 Grid voltage correction test 06 Grid voltage correction compulsive execution 07 Image density/drum mark sensor operation test 08 Process control data display 09 Process control data display (Latest value)

Grid voltage correction (Drum surface/patch)

data display

11 Initial grid bias setting

AE sensor characteristics measurement (AE sensor gain automatic adjustment)

01 Front/rear magnification ratio adjustment

Paper transport direction magnification ratio

adjustment (Mirror speed correction) 01 Copy lead edge adjustment 02 Lead edge adjustment (Simple type)

ADF stop position adjustment value (normal 01

paper) setting

ADF stop position adjustment value (thin paper) 03

setting 04 ADF resist sensor, width sensor adjustment 05 ADF paper exit sensor adjustment

Content

8 – 2

SHARP sf2120smE Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual