Minolta D1502 Mechanical Electrical

EP1054/EP1085/EP2030

MECHANICAL/

ELECTRICAL

I

MINOLTA

COTNENTS

I. CROSS-SECTIONAL VIEW

l-l. Cross-Sectional View of 23 cpm
I-2. Cross-Sectional View of I8 cpm Copier
l-3. Cross-Sectional View of 15 cpm

2. COPY PROCESS

3. DRIVE SYSTEM

4. SEQUENTIAL EXPLANATION

5. IMAGING UNIT
5-l. Imaging Unit Drive
5-2.

Imaging Unit Toner

5-3. Imaging Unit Fuse

6. PC DRUM

7. DRUM CHARGING

8. IMAGE ERASE LAMP

9. OPTICAL SECTION
9-I. Exposure Lamp
9-2. AE Sensor
9-3. Lamp Reflectors
9-4. Aperture Plates
9-5.

Scanner and 2nd/3rd Mirror Carriage Movement

9-6. 4th Mirror Movement

9-7. Lens

IO. ORIGINAL SIZE DETECTING SENSORS (23 cpm COPIER ONLY) . . . . . . . . . . . . . . M-28

1 O-I. Original Size Detecting Sensors
1 O-2. Original Size Detecting Operation

I O-3. Sensor Locations
1 O-4. Size Detection
1 O-5. Original Size Detection Timing
I O-6. Original Cover Angle Detection (23 cpm Copier Only)

11. DEVELOPMENT

11-l.

ATDC Sensor
I I-2. Magnet Roller
I l-3. Developing Bias
I I-4. Doctor Blade
1 I-5. Sleeve/Magnet Roller Lower Filter

12. TONER HOPPER
12-l. Toner Hopper Locking/Unlocking
12-2. Toner Replenishing

12-3. Shutter
12-4. Toner Hopper Home Position Detection
12-5.

Toner Bottle Vibration

12-6. Toner Replenishing Control

13. PAPER TAKE-UP/FEED SECTION (2ND DRAWER: 23 cpm
COPIER ONLY)

13-I

.Edge

13-2.Drawer Positioning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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*...............................................................................................

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Movement

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Guide and Trailing Edge Stop

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Copier

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copier

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Recycling

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. . . . . . . . . . . . . . . . . . . . . . . . . . . M-32

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M-l

M-2

M-4
M-6
M-7
M-12

M-13

. . . . . . . . . M-14

M-15

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M-17

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M-22
M-23

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M-26

M-28
M-28
M-29
M-30
M-31

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M-34

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M-37

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.._...................

M-38

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M-39
M-39
M-40

M-40

M-42

M-43
M-44
M-45

13-3.Paper Lifting Plate
13-4.Drawer-in-Position Detection
13-5.Universal Tray (1 st Drawer) Paper Size Detection
13-6.Paper Empty Detection
13-7.Paper Separating Mechanism
13-8.Paper Take-Up Roll
13-9.Paper Take-Up Retry Control
13-lO.VERTICAL

14.

MULTI BYPASS TABLE
14-1 .Paper Take-Up

14-2.Paper Take-Up Retry Control
14-3.Paper Separating Mechanism

14-4.Paper

15.

SYNCHRONIZING

15-l .Upper Synchronizing Roller Positioning

15-2.Paper Dust Remover
15-3.Synchronizing

16. IMAGE TRANSFER AND PAPER SEPARATION

17. MAIN ERASE LAMP

18. PAPER SEPARATOR FINGERS

19.

CLEANING

19-l .Cleaning Bias

20. PAPER TRANSPORT

21. FUSING UNIT

21-1. Fusing Temperature Control

21-2.Fusing
21-3.Cleaning

22. EXIT UNIT

22-l .Upper/Lower Separator

22-2.Paper Exit Sensor

23. EXIT/DUPLEX SWITCHING UNIT (OPTION)

24. DEHUMIDIFYING SWITCH

25. COOLING

26. OPTICAL SECTION COOLING FAN

27. MEMORY BACKUP

Empty

UNIT

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Rollers Pressure

Roller

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FAN

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PAPER TRANSPORT

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Mechanism .....................................................................

Detection

ROLLERS

Roller Control

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Mechanism

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Fingers

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(OPTION)

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M-45
M-46
M-47
M-40
M-49
M-50
M-51
M-52
M-53
M-54
M-55
M-56
M-56

M-57
M-58
M-58
M-59
M-60
M-62
M-63
M-64
M-65
M-66
M-67
M-68

M-69
M-69
M-70
M-70
M-71
M-72
M-73
M-74
M-75
M-76

ii

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0100A

1 CROSS-SECTIONAL VIEW

1174SBM0101A

1-1. Cross-Sectional View of 23 cpm Copier

2345 6 7 8 9 10

1

22
21
20

23

19

18
24

1. 3rd Mirror

2nd Mirror

2.

3. 1st Mirror

4. Exposure Lamp

5. Lamp Reflector

6. Lens

7. Cleaning Blade

8. PC Drum Charge Corona

9. Image Erase Lamp

10. 4th Mirror

11. PC Drum

12. Sleeve/Magnet Roller

13. Synchronizing Roller

14. Trans port Roller

15. 1st/2nd Drawer Paper Take-Up Roll

16. 1st/2nd Drawer

1617

17. Image Transfer/Paper Separator
Coronas

18. Suction Unit

19. Cleaning Roller

20. Upper/Lower Fusing Roller

21. Paper Exit Rol ler

22. Exit/Duplex Switching Guide
(for optional Duplex Uni t and Sorter)

23. Duplex Unit Vertical Tr ansport Roller 1
(for optional Duplex Unit )

24. Duplex Unit Vertical T ransport Roller 2
(for optional Duplex Unit )

1174M005AB

11
12

13

14

15

M-1

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0102A

1-2. Cross-Sectional View of 18 cpm Copier

2345 6 7 8 9 10

1

23
22
21
20

19 18 17 16

1. 3rd Mirror

2. 2nd Mirror

3. 1st Mirror

4. Exposure Lamp

5. Lamp Reflector

6. Lens

7. Cleaning Blade

8. PC Drum Charge Corona

9. Image Erase Lamp

10. 4th Mirror

11. PC Drum

12. Sleeve/Magnet Roller

13. Synchronizing Roller

14. Trans port Roller

15. Paper Take-Up Roll

16. Drawe

17. Image Transfer/Paper Separator

18. Suction Unit

19. Cleaning Roller

20. Upper/Lower Fusing Roller

21. Paper Exit Rol ler

22. Exit/Duplex Switching Guide

23. Paper Exit Roller in Exit/Duplex

11
12

13

14

15

1174M004AB

Coronas

(for optional Sorter)

Switching Guide Unit
(for optional Sorter)

M-2

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0103A

1-3. Cross-Sectional View of 15 cpm Copier

Except U.S.A., Canada

✽

2345 6 7 8 9 10

1

21
20

19 18 17 16

1. 3rd Mirror

2. 2nd Mirror

3. 1st Mirror

4. Exposure Lamp

5. Lamp Reflector

6. Lens

7. Cleaning Blade

8. PC Drum Charge Corona

9. Image Erase Lamp

10. 4th Mirror

11. PC Drum

12. Sleeve/Magnet Roller

13. Synchronizing R ol ler

14. Transport Roller

15. Paper Take-Up Roll

16. Drawer

17. Image Transfer/Paper Separator

18. Suction Unit

19. Cleaning Roller

20. Upper/Lower Fusing Roller

21. Paper Exit Rol ler

11
12

13

14

15

1174M011AA

Coronas

M-3

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0200A

2 COPY PROCESS

2 3

6

4

5

5

MULTI BYPASS
T ABLE

1139M002AA

13

1. PC DRUM

2. DRUM CHARGING

3. IMAGE ERASE

4. EXPOSURE

5. DE VELOPING

6. PAPER FEEDING

10

9

12

11

1

8

8

7

7

8. PAPER SEPARAT ION

9. CLEANING

10.MAIN ERASE

11. TRANSPORT

12. FUSING

13.PAPER EXIT

7. IMAGE TRANSFER

1. PC Drum
The PC Drum is an aluminum cylinder coated with a photosensitive semiconductor.
It is used as the medium on which a visib l e developed image of the original is formed.
(For more details, see “6. PC DRUM”.)

2. Drum Charging
The PC Drum Charge Coron a U nit is equipped wit h a Co mb Electrode and a Scorotron
Grid to deposit a uniform negative charge across th e entire surf ace of the PC Drum.
(For more details, see “7. DRUM CHARGING”.)

3. Image Erase
Any areas of charge which are not to be developed are neutralized by lighting up LED s.
(For mor e details, see “8. IMAGE ERASE LAMP”. )

4. Exposure
Light from the Exposure Lamp reflect ed off the original is gui ded to the surface of the PC
Drum and reduces the level of the negative charges, thereby forming an electrostatic
latent image.
(For mor e details, see “9. OPTICAL SECTION”.)

5. Developing
Toner positively charged in the Developer Mixi ng Chamber is attracted onto the electro­static lat ent i mage c ha ngin g it to a v is ib le , devel oped i ma ge. A DC negat ive bias v oltag e i s
applied to t he Sle eve/Magn et Roller to pr event toner from being a ttr ac te d onto th os e area s
of the PC Drum which correspond to the background areas of the original .
(For mor e details, see “11. DEVELOPMENT”.)

M-4

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

6. Paper Feeding
Pape r is fed either au tomatically fro m the 1st or 2nd Drawer, or manually via the Multi
Bypass Table or Manual Bypass Table. Each Dra wer has fingers that function to separate
the top sheet of paper from the rest at take-up. (2nd Drawer: 23 cpm Copier Only )
(For more details, see “13. PAPER TAKE-UP/FEED SECTION”.)

7. Image Transfer
The single-wir e Image Transfer C orona Uni t ap plies a DC neg ati v e c orona emi ssi on to t he
underside of the paper, thereby attracting toner onto the surface of the paper.
(For more details, see “16. IMAGE TRANSFER AND PAPER SEPARATION”.)

8. Paper Separation
The single-wire Paper Separator Cor ona Unit applies an AC corona emission to the
underside o f the p ape r to neutr al i ze t he pap er. In addition, mechanic al paper s epa rati o n is
provided by the two PC Drum Paper Separator Fingers fitted to the Imaging Unit.
(For more details, see “16. IMAGE TRANSFER AND PAPER SEPARATION”.)

9. Cleaning
Residual toner on the surface of the PC Drum is scraped off by the Cleani ng Blade.
(For mor e details, see “19. CLEANING UNIT”.)

10.Main Erase
Light from the Main Erase Lamp neutralizes an y surface potential remaining on the sur­face of the PC Drum after cleaning.
(For mor e details, see “17. MAIN ERASE LAMP”.)

11. Transport
The paper is fed to the Fusing Unit by the Suction Belts.
(For more details, see “20. PAPER TRANSPORT”.)

12. Fusing
The developed imag e is permanently fused to the paper by a combi nation of heat and
pressure applied by the Upper and Lower Fusing Rolle rs.
(For more details, see “21. FUSING UNIT”.)

13.Paper Exit
After the fusing process the paper is fed out by the Paper Exit Roller onto the Copy Tray.
(For mor e details, see “22. EXIT UNIT”.)

M-5

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0300A

3 DRIVE SYST EM

This copier is equipped with two main drive motors, the PC Drive Motor that drives the
upper half of the copier (Imaging Unit) and the Main Drive Motor which gives drive for the
lower half of the copier (paper take-up/feeding, transport mechanism and Fusing Unit).
Each has its o wn drive transmitting gears and timing belts as illustrate d bel ow.

Drive Train for Lower Half of Copier

Coupled to Paper
Take-Up Unit

Drive Train for
Paper Take-Up Unit
<23 cpm Copier>

Coupled to Copier Gear

1st Vertical
Transport Roller

2nd Vertical
Transport Roller

1139M004AA

Coupled to Exit/Duplex
Switching Unit

Paper Exit Roller Drive

Suction Unit
Drive

Synchronizing Roller Clutch CL 1

Pape r Transport
Clutch CL 2

<15/18 cpm Copier >

1st Draw er Paper
Take-Up Roll

Vertical
Transport Roller

2nd Drawer P ape r
Take-Up Roll

Main Drive Motor M2

1151M001YB

Drive Train for Upper
Half of Copier

PC Drum Drive

Imaging Uni t
Drive

1139M005 AA

PC Drive Motor M1

Coupled to Copier Gear

Paper D rawer Paper
Take-Up Roll

1142M002AA

Upper Fusing
Roller Drive

M-6

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0400A

4 SEQUENTIAL EXPLANATION

Numbers given in rectangles in the following flowchart are timer values in seconds.

✽

A The power cord is plugged into the outle t.

Power cord is plugged in.

ON

AC24V for Drum heating (Transformer)

ON

B Power Switch is turned ON.

Power Switch ON

ON

ON
ON

ON

Drum Dehumidifying
Heater

ON

Paper Dehumidifying
Heater

DC5V (Power Supply Unit)

DC24V (Power Supply Unit)
Control panel
The Cooling Fan turns at full speed.

Approx. 3

Approx. 1

ON

ON
ON

The Cooling Fan turns at half speed.

Fusing Heater Lamp

Scanner Reference Position Sensor

Only when Dehumidifying
Switch is ON

✽If the S cann er i s n ot at the home posi ti on, Scan ner Mot or i s

energi z ed to move the Scanner to the home position.

ON

Lens Reference Position Sens or

✽If the Lens is not at the home position, Lens Motor is

ON

energized to move the Lens to the home position.

Mirror Reference Position Sensor

✽If the 4th Mirror is not at the home position, Mirror

Motor is energized to move the Mirror to the home

Start er setup and ATDC Sensor a ut omatic adjustment

position.

✽Only when the Imaging Unit is new. I/U Fuse blows when the

starter setup sequence is completed normally.

M-7

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

C The Fusing Unit temperature reaches 205°C.

Fusing Thermistor detects 205°C.

ON/OFF

Fusing Heater Lamp

✽The Fusing Unit temperature control is started.

M-8

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

D The Start Key is pressed.

Start Key ON

ON

PC Drive Motor

ON

ON
ON

Main Erase Lamp

Main Drive Motor
Image Erase Lamp

✽All LEDs are turned ON.

ON
ON

ON

Developing Bias (High Voltage Unit)
Paper Separator Corona (High Voltage Unit)

Cleaning Bias (High Voltage Unit)

✽Some model s ha v e n o Bia s Seal ins tal led de pendi ng o n

ON

their marketing areas.

Synchronizing Roller Clutch ✽For appr ox 0.2 sec. onl y

Approx. 0.3

Approx. 0.2

ON

1st/2nd Drawer Paper Take-Up Solenoid

1st/2nd D r awer Paper Take-Up

Approx. 0.1

ON

PC Drum Charge Corona/Image Transfer Corona

OFF

Solenoid (2nd Drawer Paper Take­Up Solenoid: 23 cpm copier only)

Approx. 0.2

Approx. 2.5

ON

Paper Transport Clutch

ON

Synchr onizing Roller C lutch

E Paper is taken up.

1st/2nd Drawer Paper Take-Up Solenoid ON
(2nd Drawer Paper Take-Up Solenoid: 23 cpm copier only)

Approx. 0.4

1

ON

1st/2nd Drawer Paper Take-Up Sensor

1st Drawer :
Approx. 0.7
2nd Drawer:
Approx. 1.4
(23 cpm copier
Only)

ON

Approx. 0.5

Approx. 0.2

M-9

Transport Roller S ensor

ON

Paper Leading Edge
Detecting Sensor

Approx. 0.2

ON

Exposure Lamp

OFF

Paper
Transport
Clutch

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1

ON

Approx. 0.5

Scanner Motor

OFF

Scanner Reference Position Sensor

Approx. 0.2

Approx. 0.5

F A scan motion is completed.

SCEND signal: LOW

Approx. 0.2

Approx. 0.3

ON

All LEDs of Image Erase Lamp ON

Scanner starts return motion.

Approx. 0.6

✽For A4 crosswise, ×1.000

Approx. 0.3

OFF

Exposure Lamp

Image Erase Lamp LEDs ON/OFF control is started.

ON

Synchronizing Roller Clutch

ON

Paper Transport Clutch

ON

Scanne r Reference Positio n Sensor

M-10

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

G The last paper moves past Transport Roller Sensor.

Transport Roller Sensor OFF

Approx. 0.6

Approx. 0.9

Approx. 1.2

OFF

Paper Leading Edge Detecting Sensor

OFF

Approx. 0.4

Approx. 0.7

Approx. 0.5

ON

1st Paper Exit Sensor

OFF

Paper Transport Clutch

Synchronizing Roller Clutch

OFF

PC Drum Charge Corona/Image Transfer
Corona (High Voltage Unit)

Approx. 0.7

OFF
OFF

OFF

OFF

PC Drive Motor

OFF

Main Erase Lamp

OFF

Image E ra se Lamp

Developing Bias (High Voltage Unit)
Cleaning Bias (High Voltage Unit)

✽Some mode ls have no Bias Seal installed

depending on their marketing areas.

Paper Separator Corona (High Voltage Unit)

H The paper moves past 1st P aper Exit Sensor.

1st Paper Ex i t S ensor OFF

Approx. 1.5

OFF

Main Drive Motor

M-11

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0500A

5 IMAGING UNI T

This copier is equipped w ith an Imagi ng U nit, or IU, which in tegrates a PC Drum, PC Drum
Charge Corona, Developing Unit, Cleaning Unit, and Toner Recycling mechanism into one
assembly. The Unit also includes the Upper Synchronizing Roller which facilitates clearing
of a paper misfeed.

Corona Unit Cleaning
Lever

Counter

Toner Supply Port

PC Drum
Charge Corona

Coupled to Gear in
Copier

PC Drum

Developer Mixing Chamber

1139M009AA 1139M010AA

Paper Separator Fingers

Upper Synchronizing Roller

1174M014AA

Paper Guide Plate

M-12

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0501A

5-1. Imaging Unit Drive

Drive for the Imaging Unit is transmitte d by one of the gears on the Unit.
This particular gear is in mesh with the Imaging Unit Drive Gear in the copier.

Dev eloper Mixing Screw Drive Gear

Bucket Roller Drive Gear
Imaging Unit Drive
Gear (in Copier)

Sleeve/Magnet Roll er
Drive Gear

Coupling (in Copier)

1139M012AA

T oner Recycling Coil
Drive Gears

M-13

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0502A

5-2. Imaging Unit Toner Recycling

The copier is provided with a ton er recycling mechanism . The toner, which has been
scraped o ff t he surface of the PC Drum by the C lean ing Bla de and c olle cted in t he Clean ing
Unit, is conv e y ed by the tw o Toner Recycling Coils t o the Toner Supply Port and, fr om there ,
it is returned back to the Developer Mixing Chamber of the Developing Unit.

One of the gears of the Toner Recycling mechanism rece ives drive through a gear at the
rear end of the PC Drum.

Toner Supply Port

Toner Recycling Path

Toner Recycling Coil

Bev el Gears

1139M013AA

Toner Recycling Coil

1174SBM0503A

5-3. Imaging Unit Fu se

The Imaging Unit is provided with a fuse called the I/U Fuse. When a new Imaging Unit is
installed in the copier and the Power Switch turned ON, an I/U Set signal is output c ausing
the copier t o st art the starter setup sequence and ATDC Sensor automatic adjustment.

When the starter setup sequence is compl eted normally, an I/U Fuse Blow signal is output
to blow the I/U Fuse. Once the I/U Fuse is b lown, the I/U Set signals are no longer output.
This means that the starter setup sequence and ATDC Sensor automatic adjustment will
not be carried out w hen the Po w er Switch is ther eafter turned ON.

Control Signal

When Fuse is

not Blown

Fuse PWB- A PJ 1 0 A- 6 H L 2-I

When Fuse is

Blown

WIRING DIAGRAM

M-14

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0600A

6 PC DRUM

The photoconductive drum used in t his copier is the organi c photoconductor (OPC) type.
The drum is made up of two disti nct, semiconductive materials on an aluminum all oy base.
The outer of the tw o l a yers is calle d the C har ge Transport Lay er ( CTL ), wh il e the i nner layer
is called the Ch arge Generating Layer (CGL).

The PC Drum has its grounding point in side at its rear end. When the Imaging Unit is
installed in the copier, the shaft on which the PC Drum Drive Coupling Gear is mounted
contacts this grounding point.

Handling Precautions

This photoconductor exhibits greatest light fatigue after being exposed to light over an
extended period of time. I t must theref ore be protected from light by a clean, s oft cloth
whenever the Imaging U ni t has been removed from the copier. Further, use utmost care
when handling the PC Drum to prevent it from being contaminated.

PC Drum Cross-Sectional View

Grounding
Plate

PC Drum

Gear

1139M006AA

PC Drum Drive Coupling Gear

CTL

CGL

Aluminum
Cylinder

1139M007AA

Shaft

Grounding Point

1139M008AA

M-15

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0700A

7 DRUM CHARGING

The PC Drum Charge Cor ona ha s a Scor otron grid t o depo si t a negat iv e D C charg e evenly
across the surface of the PC Drum. The grid voltage (VG) applied to the grid mesh is
selected bet w een - 650V i n the no rmal mode and -520V in th e Ph ot o mode b y the Co nsta nt­Voltage Circui t in the High Voltage Unit.

The Corona Unit has a Comb Electrode which minimizes the amount of ozone produced.
The conventional wire type corona unit pro duces a large amount of ozone due to corona
discharge in ra di al dir ecti ons. The comb electro de t ype , on the ot he r hand, di sc har ges only
toward the Grid Mesh, meaning a reduced amount of ozone is produced.

The Comb Electrode can be cleaned by the user who pulls out to the front the shaft on
which a Cleaning Roller is mounted.

PC Drum

Charge Corona

Grid Voltage

(VG)

Holder

Comb Electrode

Spring

Holder

1139M030AA

Grid Mesh

Control Signal ON OF F WIRING DIAGRAM

PWB-A PJ11A-9A L H 4-C

Control Signal

Normal

Mode

Photo Mode WIRING DIAGRAM

PWB-A PJ11A-10A L H 4-C

1174T20MCA

M-16

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0800A

8 IMAGE ERAS E LAMP

To prevent a b lack band fro m occ urring across both the leading and trailing edges, and
along the front and rear edges, of the electrostatic latent i m age, 31 LEDs of the Im age
Erase Lamp are turned ON before development takes place, thereby reducing to a mini­mum the unnecessary potential on the surface of t he PC Drum. Because of the light path
involved, this copier has the edge erasing cycle between drum chargi ng and exposure.

PC Drum Charge Corona

Image Erase Lamp LA3

Exposure

1139M031AA

The position of the Image Eras e Lamp can be adjusted using the adjusting screw on the
front of the copier.

Copier F r ont Frame

Copier Rear
Frame

Compression
Spring

Image Erase Lamp

1139M032AA

Image Erase La mp

Adjusting Screw

M-17

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

The 31 LEDs of the Image Erase Lamp are grouped as shown below. The table at the bot ­tom of this pag e sho ws wh ich LE Ds turn ON and OFF f o r dif f ere nt paper s iz es an d dif f e rent
zoom r atio s.

LED Group No. LED No. LED Group No. LED No.

00 LED 1 10 LED 23
01 LED 2 to 6 11 LED 24
02 LED 7 to 11 12 LED 25
03 LED 12 to 16 13 LED 26
04 LED 17 14 LED 27
05 LED 18 15 LED 28
06 LED 19 16 LED 29
07 LED 20 17 LED 30
08 LED 21 18 LED 31
09 LED 22

The smaller the number , the nearer the LED i s to the front side of the copier.

✽

LED ON/OFF Pattern

Zoom Ratio Paper Width LED Group No.

From - To

Less Than

(%)
50~53 to 152
53~57 152 to 163
57~61 163 to 173
61~64 173 to 183
64~67 183 to 192
67~70 192 to 201
70~74 201 to 212
74~78 212 to 223
78~82 223 to 235
82~86 235 to 247
86~90 247 to 259
90~93 259 to 270
93~96 270 to 281
96~99 281 to 291

99~ 291 to

: ON;

–

❍

Max. width (291 mm or more) applies to manu al bypass copying in which the copier is

✽

unable to detect paper width.

: OFF

From - To

Less Than

(mm)

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

–––

❍

––––

❍

–––––

❍

––––––

❍

–––––––

❍

––––––––

❍

–––––––––

❍

––––––––––

❍

–––––––––––

❍

––––––––––––

❍

–––––––––––––

❍

––––––––––––––

❍

–––––––––––––––

❍

––––––––––––––––

❍

–––––––––––––––––

❍

❍❍❍❍❍❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍❍

❍❍❍❍❍❍❍

❍❍❍❍❍❍

❍❍❍❍❍

❍❍❍❍

❍❍❍

❍❍

❍

M-18

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

Control Signal ON OFF WIRING DIAGRAM

LA3 PWB-A PJ16A-4A ~ 9A L H 1-G

1174T22MCB

M-19

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0900A

9 OPTICAL SECTION

As the Scanner is moved by the Scanner Motor, the light from the Exposure Lamp is
reflecte d off the original and gui ded through the four Mirrors onto the surface of the PC
Drum to form the electrostatic la tent image.

The image is enlarged or reduced as necessary by changing the position of the Lens and
4th Mirror and varying the angle of the 4th Mirror.

23 cpm Copier

•

4th Mirr o r

Mirror Motor M7

Scanner

Lens Motor M6

AE Sensor Board
(PWB-H)

Scanner Motor M5

15/18 cpm Copier

•

Scanner Motor M5

Scanner Shaft

Lens

2nd/3rd Mirrors
Carriage

1149M008AA

1139M033AA

M-20

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0901A

9-1. Exposure Lamp

An AC halogen lamp is used as the Exposure Lamp.

As the exposure le vel is adjust ed on the control panel, the duty ratio of the pulse of AVR
Remote from the Master Board changes t o i ncrease or decrease the Exposure Lamp v olt­age, the r eby changing the image density.

In Photo mode , the v ol tage s are varied on a level 5V lo w er th an the ma n ual Ex posu re L amp
voltage s .

Manual EXP Setting9876 5 432✽1
Lamp Voltage

Diffe rence (V)

At Manual Exp osure Setting 1 only VG is reduced, thereby gi ving a lamp Voltage differ-

✽

ence equivalent to +8V.

–8 –4 –2 –1 Reference +1 +2 +4 +4

1174T13MCA

Control Signal ON OFF WIRING DIAGRAM

AVR Remote

Signal (LA1)

If reduction copie s are made using large size pa per, the trailing edge of the first copy

✽

moves past the Transport Roller Sensor after the SCEND signal for the second copy has
been generated. If the Exposure Lamp is turned ON for the sec ond copy at the same tim­ing as the first one, therefore, the imag e for the second copy is produced on the trailing
edge of the fi rs t copy. T o p revent thi s f rom o ccurrin g, th e E xpos ure Lamp i s tu rned ON for
the second and subs equent copies whe n all of the foll owing conditions are met:
Approx. 0.8 sec. or more have elapsed after the first cop y deactiva ted the Transport

•

Roller Sensor.
The Transport Roller Sensor output i s HIGH.

•

The SCEND signal for the secon d copy is output.

•

PWB-A PJ14A- 3 L H 6-D

M-21

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0902A

9-2. AE Sensor

In the A u to Ex pos ure Mode , the A E Sens or on the AE Sen sor B oar d me asure s th e i nte nsit y
of the light reflected off the original, which results in the black/white ratio of a 210-mm-wide
area from the reference position of the origin al being measur ed. According to this measure ­ment, th e Exp osure La mp v o lta ge i s au to matica lly in creas ed or dec re ased so t ha t co pies of
consistent quality are produced.

The output from the AE Sensor is appl i ed to the Master Board which, in turn, varies the
duty rati o of the AVR Remote from it to vary accordingly the Exposure Lamp voltage.

Original Density (B/W Ratio) High Low
Intensity of Reflected Light Low High
AE Sensor Board Output High Low
AVR Duty Increased Decreased
Exposu r e La m p Voltage Increase d Decre ased

Control Signal ON OFF WIRING DIAGRAM

PWB-H

(AE Sensor)

AVR Remote

Signal (LA1)

PWB-A PJ9A-3 L H 4-F

PWB-A PJ14A- 3 L H 6-D

M-22

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0903A

9-3. Lamp Reflectors

The Main Reflector ensures that light from the Exposure Lamp exposes all areas of the
original. Th e Auxiliary Ref lect or r efl ects l ight o nt o t he are as that the Ex posu re Lamp cann ot
illuminate when an original that does not lie flat on the Original Glass (such as a book) is
being used. This reduces shadows which would otherwise be transferred to the co py.

The Main Reflector is of aluminum, while the Auxiliary Reflector is aluminum to which film
has been deposi ted. The same fi lm as that used on th e A uxiliary Refl ector is affix e d to both
ends of the frame to compensate for the redu ced intensity of li ght around both ends of the
Exposure Lamp.

Auxiliary Reflector

Main Reflector

Exposure Lamp LA1

1151M021AA

1174SBM0904A

9-4. Aperture Plates

Four Aperture Plates are moved to the right or left to ens ure ev en l i ght distribut i on.

M-23

Aperture

1151M020AA

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0905A

9-5. Scanner and 2nd/3rd Mirror Carriage Movement

The Scanner and 2nd/3rd Mirrors Carriage are moved by the Scanner Drive Cable fitted in
the rear side of the copier. The Cable is driven by the Scanner Motor.

Both the Scanner and 2nd/3rd Mirrors Carriage slide along th e Scanner Shaft at the rear
side. At the front side, there is a Slide Bushing attached to the underside of each of the
bodies and th at Bushing slides over the Slid e R ail. The speed of the Scanner and 2nd/3rd
Mirrors Carriage varies with different zoom rati os.

The Scanner Reference Position Sensor detects the home position of the Scanner and
2nd/3rd Mirr ors Carriag e . If the y ar e not a t th e home po si tio n whe n t he co pier is tu rned ON,
the Scanner Motor is energized to move them to the home position.

23 cpm Copier

•

Scanner

Slide Rail

2nd/3rd Mirrors
Carriage

15/18 cpm Copier

•

Scanner Shaft

Scanner Drive Cable

Scanner Motor M5

Scanner Motor M5

Scanner
Reference
Position
Sensor PC81

1149M009AA

1151M022YA

M-24

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

The Scanner starts the scan motion as a Scan signal is output from the Master Board. At
the start of a scan motion and other heavy load conditions, the Scanner Motor requires a
large amount of current. The Current 1 or 2 signal from the Motor Drive Board is selected
accordingly to vary the amount of current supplied to the Scanner Motor.

The Current signal selection timing is control led by software.

✽

Current 1 H H L
Current 2 H L H

Operation

On receiving the Scan signal, the Motor Drive Board applies motor drive pulses, which are
out-of-phas e wit h each other, to the Scanner Motor . Th e mot or spee d is varied by changi ng
the width of the pulses applied to the Scanner Motor.

M5

Scan Signal

M5

Current

Switching

Signal 1

M5

Current

Switching

Signal 2

When the scan
speed reaches a
given level.

Control Signal Energized Deenergized WIRING DIAGRAM

PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)

PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)

PWB-F (23 cpm Copier)
PWB-E (15/18 cpm
Copier)

At scan start and dur­ing scan decelera­tion.

LH

LH

LH

At return start and
during return motion.

8-D/8-H

Control Signal Blocked Unblocked WIRING DIAGRAM

PC81 PWB-A PJ17A-7B L H 11-A

M-25

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM0906A

9-6. 4th Mirror Mo vement

The 4th Mirror is moved to vary the conj ugat e dist ance for a particular zo om ra ti o by drivin g
the rack -and-pinion gears at the front and rear ends of the mirror using the Mirror Motor
(stepping motor). The Levers of the Holder t o w hi ch the Mirror is mounte d slide along a
tilted r ail to chang e t he Mirro r angl e. Thi s ensur es that the li ght stri ke s th e sur face of th e PC
Drum in the direction of the normal, thereby preventing resolut i on from being degraded.

The Mirror Reference P osition Sens or i s used to control th e position of the 4th Mi rror. It
ensures that the Mirror is located at the home position when the copier is turned ON.

Mirror Reference
Position Sensor (PC86)

Levers

Mirror

Drive Shaft4th Mirror

Motor
M7

Lever

Tilt Adjusting Screw

1139M038AA

1139M037AA

Control Signal Energized Deenergized WIRING DIAGRAM

M7 PWB-A PJ16A - 2B L H 8-B/8-F

Control Signal Blocked Unblocked WIRING DIAGRAM

PC86 PWB-A PJ22A-5 L H 12-A

M-26

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM0907A

9-7. Lens Movement

The Lens is mo ved by the Lens Drive Cable whi ch is driven by the Lens Motor (stepping
motor). The motor drive pulses sent from the Motor Drive Board drive the Lens Motor to
move the Lens a given di stance, corresponding to the zoom ratio , from the reference posi­tion determined by the Lens Reference Position Sensor.

There is a fixed-type Lens Aperture Cover provided at the rear of the Lens (on the 4th Mir­ror end). It limits the amount of li ght striking the surface of the PC Drum.

Lens Reference Position Sensor PC 90

Lens Base Bra cket

Shaft

Lens

Spring

Lens Drive Cable

Lens Motor M6

Lens Aperture Cover

Lens

Lens Aper­ture Cover

Cam

1151M023AA

1149M010AA

Control Signal Energized Deenergized WIRING DIAGRAM

M6 PWB-A PJ16A - 1B L H 8-B/8-F

Control Signal Blocked Unblocked WIRING DIAGRAM

PC90 PWB-A PJ22A-8 L H 12-B

M-27

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1000A

10

ORIGINAL SIZE DETECTING S ENSORS (23 cpm COP IER ONLY)

The four sensors fixed in the optical section receive the light reflected off the original t o
determine the size of the original in the Auto Paper and Auto Size mode. (The i m age den­sity of the origi nal, or OD, that can b e detected is 0.6 or l ess.)

1174SBM1001A

10-1. Original Size Detecting Sensors

Original Size Detecting
Sensor CD1 PC11 4

Original Size Detecting
Sensor CD2 PC116

Size Reset Switch
S108

1174SBM1002A

Original Size Detecting
Board UN2

Original Cover Detecting
Sensor PC111

Original Size Detecting
Sensor FD3 PC115

Original Size Detecting
Sensor FD2 PC113

1174M009AA

10-2. Original Size Detecting Operation

Each photo receiver of the original size detecting sens ors responds to reflected light of a
given intensity with reference to the i ntensity of the light emitted by each LED. This allows
the Original Size Detecting Board to determine whet her or not there is an ori ginal within a
set distanc e.

Photo Receiver

Original
Original Glass

Set Distance

LED

1136M020AA

M-28

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1003A

10-3. Sensor Locations

The number and lo cation of the Original Size Detecting Sensors vary depending on the

•

marketing area as shown below.

Sensors

Areas

Metric Areas

Inch Areas

Mixed inc h/ m etric Are as

U.S.A and Canada Areas

: Standard●: Optional

❍

NOTE

If the optional sensors are installed, set Jumper Connector JP2 on the Original Size Detect ­ing Board as illustrated below and run the F7 operation.

CD1

(PC114)

CD2

(PC116)

FD2

(PC113)

FD3

(PC115)

❍●❍●
❍●❍●
❍❍❍❍

●●●●

Width (Metric)

A5L
B5L

A4L

B4L, B5C

A3L, A4C

Length (Metric)

Length (Inch)

CD1

CD2

LED1 LED2

Letter C

Letter L

FD2 FD3

B5C A4C,

A5L

Original Size Detecting Board UN2

Legal

FLS

B5L A4L B4L A3L

CN1

JP1
JP2

CD2 and FD3

Position

of JP2

are mounted

CN4
CN3

CN2

11”×17”

Width (Inch)

L: Lengthwise
C: Crosswise

CD2 and FD3
are not mounted

Invoice

Legal,
Letter L

Letter C,
11”×17”

M-29

1174M012AB

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1004A

10-4. Size Detection

The Original Size Detecting Board reads the output data provided by the original size

•

detecting sensors. By comparing the data from each sensor with the threshold level, it
determines whether there is an original placed on the Orig i nal Glass. The Origi nal Size
Detecting Board then determines the size of the original according to the combination of
the data.

Metric Area

FD2 FD3 CD1 CD2

Original Size

A3L A3L (A3L)
B4L B4L (B4L)
A4L A4L (A4L)
A5L A5L (A5L)
A4C A4C (A4C)
Letter L:
8-1/2”×11”
11”×17” 11”×17” (A3L)
Legal:
8-1/2”×14”
FLS:
8-1/2”×13”
Letter C :
11”×8-1/2”
No Original A5L

Inch Area

Original Size

11”×17” 11”×17” (11”×17”)
Legal:
8-1/2”×14”
Letter L:
8-1/2”×11”
Letter C :
11”×8-1/2”
FLS:
8-1/2”×13”
Invoice:
5-1/2”×8-1/2”
No Original Invoice

: Original Present

✽❍

If no optional sensors are mounted, data is processed as i ndicated in ( ) and the original

✽

sizes determined by the Size Detecting Board are as indicated in ( ).
The Original Size Detecting Board does not use the d ata provided by LED2 of Original

✽

Size Detecting Sensor CD2 f or the determination of the original size.
Any non-standard size is rounded off to the n earest standard size.

✽

When all sensors detect no original , the Original Siz e Detecting Board determines that

✽

A5L or Invoice size is present.

Size Determined

by UN2

Letter L (Letter L)

Legal (A4L)

FLS (A4L)

Letter C (A4C)

Size Determined

by UN2

Legal (Legal)

Letter L (Letter L)

Letter C (Letter C)

FLS (Legal)

Invoice

●

LED1 LED2 LED1 LED2 LED1 LED2 LED1

❍❍❍(❍)❍(●)❍❍❍(❍
❍❍❍(❍)❍(●)●❍●(●
❍❍●(●)●(●)●●●(●

●●●(●)●(●)●●●(●

●●●(●)●(●)❍❍❍(❍
❍●●(●)●(●)●●●(●
❍❍❍(❍)❍(●)❍❍●(❍
❍❍❍(●)❍(●)●●●(●

❍❍❍(●)●(●)●●●(●

●●●(●)●(●)❍❍●(❍

●●●(●)●(●)●●●(●

FD2 FD3 CD1

LED1 LED2 LED1 LED2 LED1 LED2

❍❍❍
❍❍❍

❍●●

●●●

❍❍❍

●●●

●●●

: Original No t Present

(❍)❍(❍)
(❍)❍(❍)

(●)●(●)

(●)●(●)

(❍)●(❍)

(●)●(●)
(●)●(●)

❍❍

●●

●●

❍❍

●●

●●

●●

)
)
)
)
)

)
)
)

)

)
)

M-30

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1005A

10-5. Original Size Detection Timing

Master CPU on the Master Board affirms and resets t he readings of the original size at the
followin g timi ngs.

Takes size readings : When the Original Cover is r aised to an angle of 15° or more (Origi-

•

nal Cover Detecting Sensor is deactivated).
Affirms size readings: When the Original C over is lo wered to an angle of 15° or less

•

(Original Cover Detecti ng Sen s or is just acti v a te d); or, when the Start key is p ress ed wit h
the Original Cover Detecting Sensor in the deactivated state.
Resets size readings: When the Original Cover is raised (Size Reset Switch is deactu-

•

ated).

M-31

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1006A

10-6. Original Cover Angle Detection (23 cpm Copier Only)

The Original Cover De tecting Sensor detects the angle of the Ori gi nal Cover as it is raised.
The following control is provided.

Original Cover raise d to an angle of 15° or more:
The size of the original is read by the Original Size Detecting Sensors.

Original Cover raised to an angle of less than 15 °:
When the Origin al Co v e r Det ect ing Senso r is act iv at ed , the origina l siz e da ta is lat ched and
Original Size Detecting Board UN2 transmits the size data to the Master Board. As soon as
the Size Reset Switch is turned ON, the size data is validated and the paper size is shown
on the control panel.

The paper size selected is reset when the Size Res e t Switch is turned OFF.

Original Cover Detecting
Sensor PC111

Size Reset
Switch S108

Magnet

1139M093AA

Control Signal Blocked Unblocked WIRING DIAGRAM

PC111 PWB-A PJ18A-2 L H 12-B

Control Signal ON OF F WIRING DIAGRAM

S108 PWB-A PJ23A-11B L H 6-C

M-32

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1100A

11 DEVELOPMENT

The Developing Unit built into the Imaging Unit performs the following functions:

Mixes the t oner and carrier well to ensure that a suffici ent amount of toner is positively

•

charged.
Detects the tone r-to-carrier ratio of the developer by means of the ATDC Sensor and

•

replenishes the supply of toner as necessary.
Detects a toner em pty condition by means of the ATDC Sensor.

•

Ensures that a proper amount of toner is attracted to the PC Drum by means of its

•

Sleeve/Magnet Roller, Developing Bias, and Doctor Blade.

PC Drum

Devel oper Mixing Screw

Doctor Blade

M-33

1139M015AA

ATDC Sensor (UN3)Sleeve/Magnet Roller Bucket Roller

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1101A

11-1. ATDC Sensor

The ATDC Sensor instal l ed on the underside of the Developer Mi xing Chamber det ects the
varying ton er-to- carrie r r ati o of t he devel oper w hi ch fl ow s o ver it in th e Ch amber. The copier
CPU compares the detected ratio with the ratio set by the ATDC Detection Level Mode
(Tech. Rep. Choice C-90) to control toner r epl enishment.

Set T/C (%) ATDC Output Voltage (V)

6.0 2.5 (Standard)

Toner is replenished for 5 seconds (the Toner Bottle is t urned one turn, which is equivalent
to a run of 2 copy cyc l es) for each Toner Replenishing signal.
If the toner-to-carrier ratio becomes lower than 3.5% in a ton er-empty condition, the copier
inhibits the initiation of a new copy cycle (this feature can be enabled or disabled by a Tech.
Rep. Choice mode). When a ratio of 4% or more is recovered as a result of Auxiliary Toner
Replenishi ng, the copier permits the initiation of a new copy cycle.
If the Front Door is swung open and closed with a T/C ratio of less than 4%, t he copier ini­tiates an Auxiliary Toner Replenishing sequence. (It stops the sequence as soon as a T/ C
ratio of 4.5% is reached.)

ATDC Sensor Automatic Adjustment

An automatic adjustment of the ATDC Sensor is made in the F8 Test Mode operation and
when a new Im agi ng Unit is instal led in the copier.

When a New Imag ing Unit is Installed in the Copier:

✽

Follo wing th e ex ec ution of the starter setup mod e upon pow er-up , the copier CPU read s the
output value of the ATDC Sensor and estab l ishes the reading as the reference value.

When F8 is Run after St arter Has Been Changed:

✽

Follo wi ng t he e xecution of the starter setup mode upo n pr essi ng o f the St art Key, the copier
CPU reads the out put value of the ATDC Sensor and establishes the reading as the refer­ence value.

NOTE

If an F8 operation is run at a time w hen the starter has not been changed, it ca n result in a
wrong T/C reference val ue being set by the copier. Av oid casual use of F8.
If the setti ng value has been cleared because of the R AM Board being replaced, however,
enter the ATDC control value before the repla cement using the Zoom Up/Down Keys in the
F8 operation (without pressing the Start Key).

M-34

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

Toner Empty Detection

The copier has no toner empty detect ing sensor and, instead, the ATDC Sensor performs
that functi on. The ATDC Sensor checks the toner-to-carrier ratio and, if it reads a T/C ratio
lower than the set level for 37 copies and, f urther, if it next reads a ratio 1% lower than the
setting , this is a toner-emp ty condition. The toner-empty cond ition is canceled after detec­tion under any of the following conditions when the Fr ont Door is sw ung open and closed:

T/C is 4% or more: The toner-empty condit i on is canceled.

•

T/C is less than 4%: The copier initiates an Auxiliary Toner Replenishing sequence and

•

cancels the toner-empty condition as soon as T/C reaches 4.5%.

Standard

Control Signal Set T/C

UN3 PWB-A PJ10A-3 6.0% 2.5 2-H

Output

Voltage

WIRING DIAGRAM

M-35

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1102A

11-2. Magnet Roller

The Magnet Roller of the Sleeve/Magnet Rol ler of this copier has the following magnetic
characte rist ic s. P art of pol e S2 b efore the princ ipa l N1 pol e (i.e., the area mark e d as S2b in
the Fig. below) provides a very weak magnetic force. If developer i s compacted and clogs
at the Doctor Blade and, as a result, part of the surface of the Sleeve/M agnet Roller is not
covered with developer, the nearby developer around S2b goes to those uncovered areas
because of it s weak magnetic force. This helps prevent blank lines from occurring on the
copy .

The Sleeve Roller, onto which developer is attracted by the magnetic fields of force set up
by the poles of the Magnet Roller, turns to convey the developer toward the po i nt of devel­opment.This al so means that de veloper fresh from the Developer Mixing Cha m ber is
alwa ys brought to the point of development.

As noted ea rlie r , t he Ima ging Uni t i nte gr at es t he Developing U nit w ith t he PC Dr um in to one
body. Because of that, it is impossible to move the Developing Unit against the PC Drum,
thereb y providing a certain d istance between the PC Drum and Sleeve/Magnet R oller . The
Sleeve/Magnet Roll er has therefore been made mov able: the Bushing is pressed by com­pression springs thereby pressing the Positioning Collars on both ends of the Sleeve/Mag­net Roller ag ai nst the PC Drum. This ensures a given distance between the PC Drum and
the Sleeve/Magnet Roller.

Magnetic Pole Positioning

Pole Having Wea k
Magnetic Force

Movable Bushi ng

Compression Spring

Fixed Bushing

M-36

PC Drum

1139M016AA

1139M017AA

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1103A

11-3. Developing Bias

A negativ e v ol tag e (Vb = De v e lopin g Bi as vo lt age) is a pplie d to th e Sl ee ve Roller to prevent
a foggy background on the cop y. The amount of toner attracted onto the surface of the PC
Drum depends on how much lower the PC Drum surface potential (Vi) is than Vb (i.e., the
potential difference).

When the potential difference is large, a greater amount of toner is attracted.

•

When the potenti al difference is small, a small er amount of toner is attracted.

•

Because the Sl eeve/Magnet Roller of this copier is mov able, a flat s pri ng is used as the
Bias Terminal which fol l ows the movement of the Sleeve/Magnet Roller.

Sleeve/Magnet R oller

Bias Terminal

1139M018AA

1151T01MCA

Control Signal ON OFF WIRING DIAGRAM

Developing Bias PWB-A PJ11A-8A L H 2-H

M-37

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1104A

11-4. Doctor Blade

The Doctor Bl ade installed over the Sleeve/Magnet Roller regulates the height of the devel­oper brush on the surface of the Sleeve Roller. The Blade is perpendicular to t he di rection
of movement of the Sleeve/Magnet R ol ler to minimiz e variations in the distance betw een
the Doctor Bl ade and Sleeve/Magnet Roller as the Sleeve/Magnet Roller moves .

Doctor Blade

Direction of Magnet
Roller Movement

Sleeve/Magnet Roller

1139M019AA

1174SBM1105A

11-5. Sleeve/Magnet Roller Lower Filter

Except the U.S.A., Canada, and Europe

✽

There is a slit provided under t he Sleeve/Magnet Roller to collect insu fficiently charged
toner in the grounded Toner Antispill Trap. This effectively prevents the toner from spilling
onto the mechanisms inside the co pier.

Sleeve/Magnet Roller

Slit

1139M020AA

M-38

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1200A

12 TONER HOPPER

1174SBM1201A

12-1. Toner Hopper Locking/Un locking

The Toner Hopper is not inte grated into the Imaging Unit; instead, it is secured to the
copier. To replace an empty Toner Bottle, the user first nee ds to swing the Toner Bottle
Holder out 40° to th e f ron t. T he Ho lder pi v ots abo ut th e Toner Suppl y Port as it is swung out
or in, which effectively prevents toner from spilling when the Holder is swung out or in.

Copier Frame

Lock

Toner Replenishing
Motor M8

Toner Supply Port

1139M024AA

1174SBM1202A

40°

Toner B ottle

Toner Bottle Holder

12-2. Toner Replenishing

Drive from the Toner Replenishing Motor is tr ansmitted via the mot or shaft to the Bottle

•

Cap Claw, which turns the Toner Bottle. As the Toner Bottle is fitted to the Coupling, both
turn together during t oner replenishing.
A Metering Chamber pr ovided at the toner supply port of the Coupling regulates the

•

amount of toner that falls through the port.
There is a supply port for the exclusive use of the starter. The starter does n ot pass

•

through the Metering C hamber, which means that it takes a shorter time to loa d the
starter.

Starter
Supply Port

Metering Chamber

Coupling

Opening

1139M025AA

Bottle Cap Cla w

Toner Replenish­ing Motor M8

1151M018YA

M-39

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1203A

12-3. Shutter

The connection between the Toner Hopper and I maging Unit is provided with a Shutter
which prevents toner from spilling when the Imaging Unit is slid out of the copier.

Imaging Unit Out of Copier Imaging Unit i n Position in Copier

Shutter

1139M026AA

1139M027AA

Imaging Unit

1174SBM1204A

12-4. Toner Hopper Home P osition Detection

The Coupling is fitted with a Home Position Plate which is detect ed by the Toner Hopper
Home Position Sens or. This ensures that the Toner Bottle is located so that it s opening is
positione d on top whenever the Toner Replenishing Motor is deenergized.

Toner Replenishing Motor M8

Home Position Plate

1151M019AA

Toner Hopper Home
Position Sensor PC 112

M-40

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1205A

12-5. Toner Bottle Vibration

When the indentations at three places on the left-hand end ( as viewed when the Toner Bot­tle is in position) of the Toner Bottle move past the protrusion in the Toner Bottle Holder, the
Toner Bottle is vibrated to prevent some of the toner from remaining unconsumed in the
Bottle.

Toner Bottle

Indentations

Protrusion

1139M029AA

Toner Bottle Holder

M-41

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1206A

12-6. Toner Replenishing Control

1. The ATDC Sensor installed in the Imaging Unit reads the toner-to-carrier rati o of the
developer in the Developer Mixing Chamber for each copy cycle.

2. It samples the ratio 16 times and compares each with the preset level.

3. If eight or more readings out of the total 16 are lower than the preset level, a Toner
Replenishi ng signal is output.

4. The Toner Replenishing Motor is turned one complete turn for each Toner Replenishing
signal (which is equivale nt to a supply of 0.3 to 0.6 g toner).

The readings taken while the Toner Replenishing Motor is turning (it takes 5 seconds for

✽

the Toner Replenishing Motor to turn one complete turn) are igno red. This mean s that, in
a multi-copy cycle, the ATDC Sensor may take readings as the next copy cycle is started
while the Toner Replenishi ng Motor is turning; but, those readings are ignored.

Control Signal Energiz ed Deenergized WIRING DIAGRAM

M8 PWB-A PJ5A-6 H L 2-D

Control Signal Blocked Unblocked WIRING DIAGRAM

PC112 PWB-A PJ17A-2B L H 2-D

Control Signal Set T/C

UN3 PWB-A PJ10A-3 6.0% 2.5 2-H

Reference

Voltage

WIRING DIAGRAM

M-42

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1300A

PAPER T AKE-UP/FEED SECTION (2ND DRAWER: 23 cpm COPIER ONLY)

13

The copier is equipped with two Paper Drawers, 1st and 2nd, that can be slid out to the
front of th e copier. Each can hold up to 250 sheets of paper.

The 1st Drawer is a universal paper size type, whi le the 2nd Drawer is a fix ed paper size
type.

Paper Take-up
Solenoids (SL2, SL3)

1st Drawer Set
Detecting Switch
S65

Marketing
Area Switch
S66

Pape r Size
Detecting Switches
(S61 ~ S64)

2nd Draw er Set
Sensor PC69

Paper Sizes That Can be Loaded

Marketing

Area

Switch

S66

Inch

Inch

Areas

Metric

Paper
Take-Up Rolls

5.5” × 8.5”, 8.5” × 11”, 8.5” × 14”,
11” × 8.5”, 11” × 14”, 11” × 17”

A5L, A4L, A4 C, A3L
8” × 13”, 8.5” × 13” [G.LEGAL]
8-1/4” × 13”

Paper Take-Up Sensors (PC55, PC56)

Paper Empty Sensors (PC101, PC102)

1st Drawer
(Universal Paper Size)

2nd Drawer
(Fixed Paper Size)

1151M004YA

1st Drawer 2nd Drawer

8.5” × 11” [LETTER], 11” × 8.5”
[LETTER], 8. 5” × 13” [G.LEGAL],

8.5” × 14” [LEGAL],
11” × 17”, 5.5” × 8.5” [INVOICE],
8” × 10.5” [G.LETTER]

10.5” × 8” [G.LETTER], 8-1/4” × 13”,
10” × 14”, 11” × 14”, 210 × 280,
280 × 210, 216 × 297, 216 × 320,
220 × 280, 220 × 330, 280 × 420

M-43

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

Marketing

Area

Switch

1st Drawer 2nd Draw er

S66

Metric

Metric

Areas

Inch

Except Taiwan

✽

1174SBM1301A

A3L, B4L, A4L, A4C, A5L, B5C,
B5L (Taiwan Only), 8” × 13”,

8.5” × 13”✽, 8-1/4” × 13”

5.5” × 8.5” [INVOICE],

8.5” × 11” [LETTER]✽,

8.5” × 14” [LEGAL]✽, 11” × 17”

A3L, B4L, A4L, A 4C, A5L, 8” × 13”
8-1/4” × 13”, 10” × 8” [QUARTO],
210 × 280, 216 × 297, 297 × 216,
216 × 320, 220 × 280, 297 × 430

✽

13-1. Edge Guide and Trailing Edge Stop

1st Drawer

The 1st Drawer is a universal type allowing the user to slide freely the Edge Gui de and
Trailing Edge Stop to accommodate paper of different sizes.

The Edge Gu ide and Trailing Edg e S to p can be lo cked into po si tio n b y meshi ng t he no tche s
in the Lock Lever wi t h t h ose in the Drawe r.

Draw er Side

Lock Lever

Trailing Edge Stop

1139M053AA

1139M052AA

Edge Guide

1139M054AA

2nd Drawer

The 2nd Dr awer is a fixed paper size typ e, in which the Edge Guide and Trailing Edge Stop
are screwed into fi xed positions.

The Edge Guid e is provided wit h an Edge Pad (whi ch is Velcro) that prevents double feed
and ensures that the paper stack keeps its correct alignment with regard to the paper path
reference positio n.

M-44

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1302A

13-2. Drawer P ositioning

Each of the 1st and 2nd Drawers is positioned by fitting its Positioning Plat e on the paper
take-up end into the groove in the Drawer Frame. It is then secured in positi on by the mag­net insta lled in t he Dr a we r Front Cov er on the paper tak e- up end . The tabs on both sid es at
the front of the Draw er ensure that the Drawer cl i cks into p osition. Any deviation in the
paper path reference position can be adjusted within ±2 mm by movin g the Fron t C over of
the Drawer to the front or rear.

Tab

Rear End

Positioning
Plate

Front End

1139M056AA

Position
Plate

1151M024AA

1139M057AA

1174SBM1303A

13-3. Paper Lifting Plate

The Paper Lifting Plate of each Drawer is raised at all times by two Paper Lifting Springs.

For the 2nd Drawer, the type and position of the Paper Lifting Springs must be changed
according to the paper size. (For details, see DIS/R EASSEMBLY, ADJUSTMENT.)

Paper Lifting Plate

Pape r Li fting Springs

M-45

1139M058AA

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1304A

13-4. Drawer-in-Position Detection

The copier detects that the Drawer is slid into position as follows.

1st Drawer

When the 1st Drawer is slid into the copier, the Drawer Fr ame presses the 1st Drawer Set
Detecting Switch installed on the back panel of the copier.

2nd Drawer

When the 2nd Drawer is slid into the copier, the Rib on the Drawer Frame blocks the 2nd
Drawer Set Sensor.

Paper Size
Detecting Switches

S61

S62S63

1st Drawer Set
Detecting Switches S65

1139M060AA

Drawer Frame

2nd Drawer Set Sensor PC69

<Control>

Control Signal ON OF F WIRING DIAGRAM

S65 PWB-A PJ15A-11 L H 15-B

Control Signal Blocked Unblocked WIRING DIAGRAM

PC69 PWB-A PJ2A-2 L H 17-A

1139M061AA

M-46

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1305A

13-5. Universal Tray (1st Drawer) Paper Size Detection

The length (feeding direction) and width (crosswise direction) of the paper are indepen­dently detec ted and the copier determines the paper size by combining the two separate
detections made.

On the bottom of the tray is a le v er fit ted to the Trailing Edge Stop and another lev er f itted to
the Edge Guide. These le vers actuat e and deactuate Paper Size Det ecting Switches to
allow the copier to determine a particular paper size.

The Marketing Area Switch is used t o set the type of paper to be used (inch or metric).

S62

Marketing Area
Switch S66

S61

S63

S64

Drawer Set Detecting
Switch S65

NOTE

The number and the installed position of
the Pap er Take-Up Roll s vary depe nding o n
the marketing areas: inch or metric. See
pp. M-43 and M-44 for the sizes of the
paper that can be taken up and f ed out of
the drawer.

1151M003AA

Paper Size Detecting Switches

Length (FD) Width (CD)

S61 S62 S63 S64

ON ON ON – 402.0~402.0 A3 11” × 17”
ON ON OFF

ON OFF OFF
OFF OFF OFF – 317.2~272.0 A4L Letter L

OFF OFF ON

OFF ON ON

OFF O N OFF

The 2nd Dra w e r acc epts only pa per of a fi x ed s iz e an d ha s no pa per si z e de te ctin g syst em.
(The paper size is input from the control panel using a Tech. Rep. Mode.)

OFF

ON 11” × 14”

OFF

ON 11” × 14”

OFF

ON Letter C

OFF

ON A4L Letter C

OFF

ON Letter L

Paper Length

402.0~349.2 B4

349.4~317.2 FLS

272.0~222.0 B5L

222.0~195.0

195.0~195.0 B5C

Inch/Metric Setting Switch S66

Metric Inch

8-1/2” × 14”

8-1/2” × 14”

Letter L

A5L Invoice L

Letter C

M-47

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

<Control>

Control Signal ON OF F WIRING DIAGRAM
S61 PWB-A PJ15A-1 L H 14-A
S62 PWB-A PJ15A-3 L H 14-A
S63 PWB-A PJ15A-6 L H 15-A
S64 PWB-A PJ15A-9 L H 15-A
S66 PWB-A PJ2A-4 L H 17-B

1174SBM1306A

13-6. Paper Empty Detection

When the Dr a we r runs ou t of p ape r, the Ac tuat or for the Paper Empty Sens or drops int o the
cutout in the Paper Lifting Plate. This activates the Paper Empty Sensor and the copier
detects that the Drawer has run out of paper.

As noted ea rlie r , t he Paper Lif tin g Pl ate is ra ised a t all t imes b y the Paper Lifting Springs. To
prevent the Actuator for the Paper Empty Sensor from being caught by the paper stack
when the Drawer is slid out of the copier, it is tilted slightly. This, however, results in the
operating stroke of the Actuator becoming small, which increases the possibility of the
Actuator activating the Sens or by the flexing of a sheet of paper a s it is ta ken up and fed in.
To prevent thi s false detection of a paper-empty condition, the paper empty detection is
enabled only when the P aper Take-Up Roll is in the retracted positio n.

Paper Empty Sensor (PC101, PC102)

1139M062AA

Actuator

<Control>

Control Signal Blocked Unblocked WIRING DIAGRAM

PC101 PWB-A PJ4A-6 L H 17-F
PC102 PWB-A PJ3A-4 L H 17-D

M-48

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1307A

13-7. Paper Separat ing Mechanism

Each Dra wer has Fingers that separate the top sheet of paper from the rest of the paper
stack at paper take-up. The Fingers are fi tted to the right front and rear corners of the
Drawer. When the Paper Take-Up Rol l starts turning to tak e up the top sheet of paper, its
turning f orce is di rectl y t r ansmit ted t o the to p she et of pa per as it is in dire ct con tact wit h the
Pape r Take-Up Roll. That force overcomes the block of the Fingers, causi ng the top sheet
of paper to ride over the Finge rs and be fed out of the Drawer into the copier.

As to the s econ d s hee t of pap er, the paper transport f orce obt ain ed t hro ugh fri cti on w it h the
top sheet of pa per is weak and does not al l ow the second sh eet of paper to ride over the
bloc k of the Fingers. Hence, the second sheet of paper remains stationary with the rest of
the paper s ta ck in t h e D rawe r.

When there are only two sheets of paper left in the Drawer, the bottom sheet can be fed
with the top one if the fricti on of the Paper Lifting Plate is weak. The F r iction Plate affixed to
the Paper Lifting Plate prevents this from happening.

Paper Take-Up Roll

Paper

Paper Lifting PlateFriction Plate

Separator Finger

1139M063AA

M-49

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1308A

13-8. Paper Take-Up Roll

Since the Paper Lifting Plate is raised at all times by the Paper Lifting Springs, paper is
wedged in the mec hanism when the Drawer is slid out of the copier if the Paper Take-Up
Roll is rou nd in s hape . So t he Take-Up Ro ll i s s emici rcula r a nd th e circ u lar part of th e Roll i s
positioned on top at times other than take-up. For convenience, we call this position of the
Paper Take-Up Roll the “retracted” position.

The Pap er Take-Up Roll is g rooved to k eep good friction e ven under hea vy l oadi ng. T he 1st
Draw er, which is a universal type to accommodate paper of di fferent sizes, is provided with
five (four in areas usi ng only inch paper) Paper Take-Up Rolls. T he 2nd Drawer accommo­dating paper of a fixed size only is equip ped with two Rolls whose positions must be
changed acc ording to the paper size. (F or the positions, see DIS/REASSEMBLY, ADJUST­MENT.)

The Paper Take-Up Roll is driven wh en the Paper Take-Up Solenoid is energized. The Roll
is turned one complete turn for each s i ngle sheet of paper.

The Paper Take-Up Sensor is used to detec t whether a sheet of paper has been properly
taken up or not .

Paper Take-Up Roll

Ratchet

1139M064AA

Paper Take-Up Sensor (PC55, PC56)

Actuator

Paper Take-Up Solenoid (SL2, SL3)

Ratchet

1151M025AA

Vertical Transport Roller

1139M066AA

M-50

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174T21MCA

Control Signal Energized Deenergized WIRING DIAGRAM
SL2 PWB-A PJ4A-9 L H 17-F
SL3 PWB-A PJ3A-2 L H 17-D

Control Signal Blocked Unblocked WIRING DIAGRAM

PC55 PWB-A PJ4A-2 H L 17-F
PC56 PWB-A PJ3A-7 H L 17-E

1174SBM1309A

13-9. Paper Take-Up Retry Control

To minimize the occurrence of paper misfeed due to a slippery Paper Take-Up Roll, the
Pape r Take-Up Sol enoid is energized a second time if a sheet of paper fails to reach the
Pape r Take-Up Sens or wit hi n T s ec. after th e s ole noid has b een deen ergi ze d. The sol enoi d
is energized this second time 0.5 sec. after the above-mentioned period of T sec. has
elapsed. (This is referred to as the paper take-up retry function.)

A misfeed res ults if the sh eet of pap er do es not reac h th e P a per Take-Up S ensor even af te r
three paper take-up sequences (i nitial take-up plus two retries).

Here is the control timing chart.

1174T15MCA

1st Drawer 2nd Drawer

T 1.3 sec. 1.6 sec.

M-51

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1310A

13-10.VERTICAL PAPER TRANSPORT

The sheet of paper taken up by the Paper Take-Up Roll from the Drawer is fed along the
Pape r Guide to the Vertical Transport Rollers. The paper fed by the Vertical Transport Roll­ers reache s t he Transport Roll ers and is then fed up to the Synchronizing Rollers. The
Transport Rollers are turned and stopped by the Paper Transport Clutch. The Transport
Roller Sensor i mmediately before the Transport Rollers detects a sheet of paper fed from
the Vertical Transport Section or Manual Bypass Table.

The Cov er for the Vertical Transport Section (i .e . , the S ide Door) can be open ed a nd cl ose d
for clearing misfeeds. The Side Door Dete ct i ng Sensor detects whether or not this Cover is
open.

<23 cpm Copier> <15/18 cpm Copier>

Transport
Rollers

Actuator

Transport Roller
Sensor PC51

<Control>

Transport
Rollers

Side Door
Detecting
Sensor PC57

Vertical
Transport
Rollers/Rolls.

1139M067AA

Actuator

Transport Roller
Sensor PC51

Side Door
Detecting
Sensor PC 5 7

Vertical
Transport
Rollers/Rolls.

1142M006AA

1174T16MCA

Control Signal Energized Deenergized WIRING DIAGRAM
CL2 PWB-A PJ5A-2A L H 4-B

Control Signal Blocked Unblocked WIRING DIAGRAM

PC54 PWB-A PJ17A-2A L H 4-D

M-52

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1400A

14 M ULTI BYPASS TABLE

The optional Mul ti Bypass Table permits the user to make multiple copies (up to 50) on
paper that cannot be fed automatically via any built-in paper drawer of the copier.

Standard on 23 cpm co pier, optional on 18 cpm copier and 15 cpm copier.

✽

Lever

Manual Feed
Paper Empty
Sensor
PC31

Paper Take-Up
Clutch CL51

Paper Take-Up Roll

Manual Fe ed Paper Take-Up Solenoi d
SL51

1139M087AA

M-53

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1401A

14-1. Paper Take-Up Mechanism

The Paper Take-Up Rolls are normally in their raised (retracted) position so that they will
not hamper proper loading of paper. When the Start Key is pressed, the Manual F eed
Pape r Take-Up Sol enoid is deenergized causing the Paper Take-Up Rolls to press the
paper stack downward and take up a sheet of paper.

Pape r Stoppers are provided that block the leading edge of the paper stack as it is loaded
on the Table, preventing any portion of the lea di n g edge of the paper from getting inside.
These Stoppers are unlocked at paper take-up, allo w ing paper into the copier.

Manual F eed Paper Take-Up Clutch controls the turni ng and stop of the P aper Take-Up
Rolls.

In Standby

At Take-Up

Lock Levers Lever

Paper Take-Up
Rolls

Pape r Stoppers

Rack Gear

1139M088AA

1139M089AA

Manual Feed
Paper Take-Up
Solenoid SL51

M-54

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174T18MCA

Control Signal Energized Deenergized WIRING DIAGRAM

CL51 PWB-A PJ5A-4B L H 17-H
SL51

DOWN

SL51

UP

1174SBM1402A

PWB-A PJ5A-2B L H

17-H

PWB-A PJ5A-3B L H

14-2. Paper Take-Up Retry Control

To minimize the occurrence of a paper misfeed due to a slippery Paper Take-Up Roll, the
Manual Feed Paper Take-Up Clut ch is kept deenergized for a giv en period of time before it
is energized again, if a sheet o f paper fails to reach the Transport Roller Sensor e ven after
the lapse of a g iv en p eriod of ti me aft er the c lutc h ha s first been energi z ed. (T his i s referred
to as the pap er take-up re try function.)

A misfeed results if the sheet of paper does not reach the Transport Roller Sensor even
after three paper take-up sequences (initial take-up plus two retries).

Here is the control timing chart.

1174T19MCA

M-55

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1403A

14-3. Paper Separat ing Mechanism

The paper separating mechanism ensures that only the top sheet of paper is fed in by sep­arating the second sheet of paper from the top one. This is accomplished by th e Torque
Limiter fitted to the Separator Roll shaft which stops the Separator Roll when there is a
change in friction between the Feed and Separator Rolls.

1174SBM1404A

14-4. Paper Empty Detection

The Multi Byp ass Table is equi pped wi th a Man ual F e ed P a per Emp ty Sen sor wh ic h d etec ts
a sheet of paper at the manual bypass port.

Manual Feed
Pape r Empty Sensor
PC31

Paper Take-Up Roll

Pape r Stopper

Actuator

1139M092AA

Control Signal Blocked Unblocked WIRING DIAGRAM

PC31 PWB-A PJ5A-6B L H 17-H

M-56

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1500A

15 SYNCHRONIZING ROLLERS

The Synchroni zing Rollers, operating in phas e w ith the Scanner’s scan motion and paper
feed ing, synchr oniz e the lead ing edge of the cop y paper accur atel y with the leading edge of
the toner image on the PC Drum.

The Upper Synchronizing Roller is a metal roller covered with a polyvinyl chloride tubing,
while the Lower one is a rubber roller.

Synchronizing

Upper Synchronizing Roller

Lower Synchronizing Roller

Paper Leading Edge Detecting
Sensor PC54

Roller Clutch CL1

1151M026AA

To facilitate clearing of misfeeds, the Upper Synchronizing Roller is installed in the Ima gi ng
Unit. It i s fitted to the Guide Frame of the Imaging Unit and the Compression Springs at the
front and rear ends press the Roller downward so that it makes c ontact with the Lower S yn­chronizing Roller. The Lower Rol l er is driven by the drive source, while there is a gear train
that tra nsmits th e rotation of the Low er Roller to the Upper Rolle r , thus en suring good pa per
transport performance.

To ensure good image transfer during conditions of high humidity, the Pre-Synch Guide
Plate is elect rical ly fl oated b y a plas ti c spac er, grounded through an 82MΩ resistor an d 1k V
varistor.

Upper Synchronizing Roller

Compression Spring

Pre-Image Transfer
Guide Plate

Guide Frame

Pre-Synch Guide Plate

Paper Leading Edge
Detect i ng Sensor PC 5 4

Lower Synchronizing Roller

1139M069AA

Actuator

M-57

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1501A

15-1. Upper Synchronizi ng Roller Positioni ng

Since the Upp er Synchronizing R ol l er is fitted to the Imaging Unit, i t must be correctly posi­tioned with reference to t he Lower Synchroni zing Roller when the Upper Half of the copier
is swung down into the locked position. For this purpo se, slits are cut in the lower copier
frame and the Bushings of the Upper Synchronizing Roller fit in to these slits.

The Upper Synchronizing Roller is grounded through the Bushings which are in contact
with the frame. To positively ground the Rol ler, the Ground Plate fitted to the l ower frame
makes contact with the Shaft of the Upper Synchronizing Roller.

Upper Synchronizing shaft

Lower Copier Frame

Ground Plate

1151M027YA

1174SBM1502A

15-2. Paper Dust Remover

The Pa per Du st R emover is inst alle d so t hat it mak es c ontac t wi th the U pper Sy nchr oni zin g
Roller. Since the Upper Synchronizing Roller is cove red with a vinyl tubing, triboelectric
charging occ urs as the Roller turns in contact with the Paper Dust Remover . As paper is
then f ed between the Synchronizing Rollers, the charges on the tubing attract paper dust
from the paper. The dust is then transferred onto the Paper Dust Remover.

Upper Synchronizing Roller

Lower Synchronizing Roller

Paper Dust Remover

1139M071AA

M-58

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1503A

15-3. Synchronizing Roller Control

The Synchroni zing Rollers are started as the Synchronizing Roller Clutch is energ i zed
upon recepti on of a signal from the Master Board.

1174T17MCA

t: The value of t depends on the settings made in Adjust Mode.

Control Signal Energized Deenergized WIRING DIAGRAM
CL1 PWB-A PJ5A-4A L H 4-A

Control Signal Blocked Unblocked WIRING DIAGRAM

PC54 PWB-A PJ17A-2A L H 4-D

M-59

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1600A

16 IMA GE TRANSFER AND PAPER SEPARA TI ON

Image Transfer

The Image Transf er Corona appl i es a DC negative corona emission to the underside of the
paper there b y at tr act ing the pos it iv ely cha rged to ner o nto th e surface of the paper to fo rm a
visible, dev eloped image of the ori gi nal. The Corona Unit is provided with a Corona Wire
cleaning mechanism: the opera tor has only to pull out the Lever on which the Cleaner is
mounted from the front of the copier, which cleans the Wire.

Paper Separation

The Paper Separator Corona showers the u nderside of the paper with both positive and
negative charges so that the paper can be easily separated from the PC Drum. In additi on,
two Paper Separator Fingers physically peel the paper off the surface of the PC Drum. (For
details, see PAPER SEPARATOR FINGERS.)

The Image Transfer /Paper Separator Coronas Unit is provided with a Pre-Image Transfer
Guide Plate t hat determines the angle at w hi ch the paper comes into contact with the PC
Drum and keeps an optimum distance between the paper an d the PC Drum so that the
image may b e properly transferred onto the pa per.

The Image Transfer/Paper Separator Coronas Unit is grounded via a 2.6MΩ resistor, which
improves its effici ency to discharge to the PC Drum side, thus reducing the output current
from the High V oltage Unit.

Housing

Paper Se parator
Corona Wire

Resistor

M-60

1149M013AA

Image Transfer
Corona Wire

CleanerCleaner Lever

PC Drum

Pre-Image
Transfer Guide
Plate

1139M047AA

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

Control Signal ON OFF WIRING DIAGRAM

Image Transfer

Corona

Paper S epara tor

Corona

PWB-A PJ11A-9A L H 4-C

PWB-A PJ11A-8A L H 4-C

1174T14MCA

M-61

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1700A

17 MAIN ERASE LAMP

The Main Erase Lamp is turned ON to neutralize an y surface potential remaini ng on the
surface of the PC Drum after cleaning.

Mounting Bracket Main Erase Lamp LA2

Slit

PC Drum

1139M044AA

The Main Erase Lamp consists of five tungsten-filament lamps mounted on a Board.

Slit

Tungsten-Filament Lamp

Mounting Bracket

1174M001AA

Copier
Front Frame

1151T06MCA

Control Signal ON OFF WIRING DIAGRAM

LA2 PWB-A PJ10A-7 H L 2-I

M-62

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1800A

18 PAP ER SEPARATOR FINGERS

After image transfer , an AC c orona emission is applied to the undersi de of the paper by the
Pape r Separator Corona to neutralize the paper so that it can be easily separated from the
PC Drum. To further ensure that the paper is p ositively separated from the PC Drum, there
are two Paper Separat or Fingers attached to the Imaging Unit. They physically peel the
paper off th e surface of th e PC D rum.

The Paper Separator Fingers are made of plastic and are kept in constant contact w i th the
surface of the PC Drum.

PC Drum

Separator Finger

1174M006AA

The Paper Separator Fingers are also moved back and forth over a given distance so that
they will make contact with a wider surface area of the PC Drum, thus preventing localized
damage to the PC Drum surface. This lateral movement is done by the Lever connec ted to
the Cleaning Bl ade and , when the C l eani ng B lad e is moved, t he Separ at or Finge rs are al so
moved back and fo rth.

Lateral Movement: 3.7 mm

✽

Cleaning Blade

Lever

100mm

1139M050AA

Finger Positions

Holder

80mm

Paper Path
Refere nce Posit i on

M-63

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM1900A

19 CLEANING UNIT

The Cleaning Bl ade is pressed tightly against the surface of the PC Drum and scrapes of f
any toner remaining on the surface after image transfer and paper separati on have been
completed.

The Cleaning Blad e is mov ed bac k and f orth to prev ent the PC Drum from deterio rati ng and
the Cleanin g Bl ade from warping away from the surface of the PC Dru m .

A Toner Antispill Mylar is affixed to the Imaging Unit. It prevents toner scraped off the sur­face of the PC Drum from falling down onto the surface of the copy paper or the paper path.

In additio n, a Si de S eal a nd B rush Sea l are af fi x ed to bot h ends of the I mag ing Un i t on b oth
sides of the Cleaning Blade. They pre vent toner from spilling from both ends of the Clean­ing Blade.

Cleaning Blade
Tension Spring

Side Seal

Brush Se a l

1139M021AA

Toner Antispill Mylar

Blade Lateral
Movement Cam

1139M022AA

M-64

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM1901A

19-1. Cleaning Bias

Except the U.S.A., Canada, and Europe

✽

A Cleaning Bias Seal is installed to minimize damage to the PC Drum from acid paper.

Toner Antispill Mylar

PC Drum

1139M023AA

Cleaning Bias Seal

1151T02MCA

Control Signal ON OFF WIRING DIAGRAM

Cleaning Bi as PWB-A PJ11A-8A L H 2-H

M-65

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2000A

20 PAPER TRANSPORT

After hav ing go ne th rou gh the i mage trans f e r and pa per sepa ra ti on pro cesse s, the paper is
then transported to the Fusing Unit by the Suction Belts of the Suction Deck dri ven directly
by the Main Drive Motor.

The Suction Fan Motor dr a ws th e paper o nt o th e t urning Suc ti on Bel ts f or po s itive transport
of the paper.

The Suction Fan Motor is turned on/off at the same timing as the Main Motor.

Suction Fan Motor M4

Suction Belt s

1151M005AA

Control Signal Energized Deenergized WIRING DIAGRAM

M2 PWB-A PJ11A - 14A L H 25-F
M4 PWB-A PJ5A-9A L H 4-B

M-66

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM2100A

21 FUSING UNIT

The Upper Fusing Roller and Lower Fusing Roller to gether apply heat and pressure to the
toner and pape r to permanently fix the develope d i m age to the paper.

Drive for the Upper Fusing Roller is transmitted from the Main Drive Motor to the Upper
Fusing Roller Drive Gear. The Lower Fusing Roller and Cleaning Roller are driven by the
respective Rollers in contact with them.

Fusing Thermistor TH1
Fusing Thermoswitch TS1
Fusing Heater Lamp H1

Paper Exit Roll

Upper Fusing Roller

Lower Fusin g Roller

Cleaning RollerPressur e Sp ring

1174M002AA

Paper Exit Roller Drive Gear

Upper Fusing Roller Drive Gear

M-67

1151M007AA

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2101A

21-1. Fusing Tem perature Control

The Upper Fusing Roller i s heate d b y a Fusing H eater La mp which is an AC hal ogen lamp .
The Fusing Thermistor inst alled on the U pper Fusing Roller helps keep the optimum fus ing
temperature.

The fusing temperature is normally controlled at 195°C. To ensure good fusing perfor­mance, however, even when the Lower Fus i ng Roller remains cool immediately after warm­up in the early morning, the temperature is controlled as follows when the copier is turned
ON:

If the initial fus i ng temperature is less than 90°C:

✽

Temperature is controlled at 205°C f o r 3 min . aft er the c opi er has complet ed w arming up,
which is foll owed by a temperature control at 195°C.
If the initial fus i ng temperature is less than 150°C:

✽

Temperature is controlled at 205°C f o r 1 min . aft er the c opi er has complet ed w arming up,
which is foll owed by a temperature control at 195°C.
If the initial fusing temperature is more than 150°C:

✽

Temperature is controlle d at 195°C after the copier has completed warming up.

TH1 is positioned at a point 84 mm from the paper path reference position, thereby prevent­ing offset c aused by low te mperature and degraded fusing performance for small-size
paper.

The control t emperature in the Energy Saving Mode is 100°C.

The Fusing Thermoswitch, installed above the Upper Fusing Roller, cuts off the power to
the Fusing Unit if the temperature of the Upper Fusing R oller becomes e xcessively high. It
eliminates the possibility of a fire that could occur when the Fusing Heater Lamp remains
ON due to a faulty temperat ure control circuit.

1174M008CC

M-68

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM2102A

21-2. Fusing Rollers Pressure Mechanism

Pressure Springs are installed at bot h ends of the Lower F using Roller. These springs con­tact the bearings mounted on both ends of the Lower Fusing Roller and exert pressure
through the Lower Fusing Roller to the U pper Fusing Roller which is instal led in the Fusi ng
Unit.

The Fusing Unit is divided i nto an upper and a lower half, and the upper half can be s wung
open. The Upper Half of the copie r, when locked in posi tion, presses t he upper half of the
Fusing Unit down onto its lower half.

Upper Copier Frame

Upper Fusing Roller

Pressure Spring

1139M076AA

1174SBM2103A

Lower Fusing Roller

21-3. Cleaning Roller

The Cleaning Roll er i s made up of a core al umin um roll er aro und which a high t empe ra ture
resistant paper based material i s wound. As well as serving to clean the surface of th e
Upper and Lower Fusing Rollers, the Cleaning Roller also ensures that the temperatu re
along the ent ire length of the Fusing Rollers does not rise excessively when, f or example,
continou sly feeding small size paper.

Upper Fusing Roller

Lower Fusing Roller
Cleaning Roll er

1174M003AA

M-69

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2200A

22 EXIT UNIT

The Paper Exit Roller/ R o l ls feed the paper , to which the developed image has been fixed,
out of the Fusing Unit onto the Copy Tray. The Charge Neutralizing Brush touches the sur­face of the sheet of paper being fed out of the Fusing Unit to neutraliz e any static charge
left on it. The Up per and Lower Separator Fingers strip the paper from the surface of the
Upper/Lower Fusing Rollers .

Paper Exit Roll

Charge Neutr al i zing Brush

Upper Separator Finger

Paper Exit Roller

Lower Separator Finger

1174SBM2201A

1139M078AA

22-1. Upper/Lower Separator Fingers

The Upper and Lo wer Sepa ra tor F inge rs are la id out as s ho wn be lo w to cop e with many dif ­ferent paper sizes.

B5

175.6

158

A5

B6

122.6

A6

106

19

Pape r Path Reference

36.6

Position
Unit: mm

✽

Lower Separator Fingers

1139M079AA

A3

273

A4

B4

231

250.6
Upper

Separator
Fingers

M-70

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM2202A

22-2. Paper Exit Sensor

1st Paper Exit Sensor i nstalled in the paper exit section of the lower half of the copier
detects the s heet of paper being fed out of the Fusin g Unit onto the Copy Tray.

Actuator

Paper Exit Roller

1139M080AA

Paper Exit Sensor PC53

Control Signal Blocked Unblocked WIRING DIAGRAM

PC53 PWB-A PJ17A-8A L H 2-B

M-71

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2300A

23 EXIT/DUPLEX SWITCHING UNIT (OPTION)

If the copier is configured w i th an optional Sorter or Staple Sorter, or Duplex Unit (i nstalled
in the Cabinet), the Exit/Duplex Switching Unit must be fitted to the exit section of the
copier.

Exit/Duplex Switching Plate

Drive Transmitting Gear
(coupled to a ge ar in the
Exit Section of the copier)

1139M081AA

The Master Board outputs a signal to energize th e Exit/Duplex Switching Solenoid, which
switches the position of the Exit/Duplex Switchi n g Plate. The Unit has a 2nd Paper Exit
Sensor b uilt into it which detects a sheet of paper being fed out of the Unit. ( For more
details of switching control, see the Service Manual for “DUPLEX U N IT.”)

2nd Paper Exit Sensor PC30

Paper Exit Roller/Rolls

Exit/Duplex Switching Solenoid SL61

Exit/Duplex Switching Plate

1139M082AA

M-72

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM2400A

24 DEHUMIDIFYING SWITCH (OPTION)

To prevent imag e tr an sf er ef f ici ency fr om bei ng redu c ed du e to damp pa per in hi ghly hu mid
weather, a Paper Dehumidifying Heater is install ed on the base frame of the copier under
the 2nd Drawer.

A Drum Dehumidifying Heater is located under the Lo wer Guide Plate t o pr even t the PC
Drum from forming condensation.

Both Drum and Paper Dehumidify i ng H eaters are ON when the Dehumidifying Swi tc h i s
ON and the power cord plugged in. They are OFF it the Dehumidifying Switch is OFF.

Drum Dehumidifying H eater H2

Lower
Synchronizing
Roller

1174M013AC

Dehumidifying
Switch S3

Paper Dehumidifying Heater H3

1149M023AA

Base frame

M-73

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2500A

25 COOLING FAN

Ozone produc ed by the PC Drum Charge Co rona and Image Transfer/Paper Separator
Coronas is dr awn out of the co pier by the Cooling Fan Motor and absorbed by the Ozone
Filter.

The Cooling Fan Motor is turned either at high or lo w speed. It turns at high speed during
the time the main mo tor is on and for 3 sec onds after the power switch is turned on.

Cooling Fan Motor M9

PC Drum Charge Corona

Image Transfer/Paper
Separator Coronas

Control Signal Energized Deenergized WIRING DIAGRAM

M9 PWB-A PJ20A - 3 H L 11-A

Duct

1151M009AA

M-74

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL

98.04.24

1174SBM2600A

26 OPTICAL SECTION COOLING FAN

The Optical Section Cooling Fan Motor draws outside air into the copier and blows it
against the Original Glass which is heated by the lit Exposure Lamp.

The Filter at the intake port of the Fan prevents dust and dirt fr om entering the Optic al Sec­tion of the copier.

The Optica l Section Cooling Fan Motor turns only while the Main Dri ve Motor is being ener­gized.

<23 cpm copier>

Filter O riginal Glass

Rear of
Copier

Optical Section Cooling
Fan Motor M3

1149M024AA

<15/18 cpm copier>

Fron t of Copier

Outside Air

Filter

Optical Section Cooling
Fan Motor M3

Original Glass

1139M095AA

Control Signal Energized Deenergized WIRING DIAGRAM

M3 PWB-A PJ22A- 2 L H 5-F/5-G

Front of
Copier

M-75

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL

98.04.24

1174SBM2700A

27 MEMORY BACKUP

IC1 (RAM) of the RAM Board connected to the Master Board s tores the setting/adjustme nt
values set in the Tech. Rep. Mode s as well as the counter counts. The Backup Battery i s
mounted on the RA M Board to prevent the content s of memory from being lost when the
power cord is unplugged or the RAM Board removed from the copier. The Backup Battery
requires a voltage of 2V or more to retain the conten ts of memory.

Important

As noted above, the RAM stores critical data. If the RAM Board has been replaced with a
new one, memory must first be cleared and then all settings be made again. It sh ould also
be noted that the RAM Board should not be replaced at the same time when the Master
Board is replaced.

M-76