Minolta 1052 General

EPlO52

-

GENERAL,

MECHANICA

ELECT

MINOLTA

RICA

1158SBGOOOBA

CONTENTS

SPECIFICATIONS

1.
PRECAUTIONS FOR INSTALLATION

2.
PRECAUTIONS FOR USE

3.
HANDLING OF THE CONSUMABLES

4.

5.

SYSTEM OPTION

1158SBMOOOBA

1

MECHANICAL/ELECTRICAL

CROSS-SECTIONAL VIEW

1.
COPY PROCESS

2.
DRIVE SYSTEM

3.
SEQUENTIAL EXPLANATION

4.
PC DRUM

5.

IMAGINGUNIT .............................................

6.
6-l. Imaging Unit Drive
6-2. Toner Recycling
6-3. I/U Fuse F4

DEVELOPMENT
7-l. ATDC Sensor
7-2. Magnet Roller
7-3. Developing Bias
7-4. Doctor Blade
7-5. Magnet Roller Lower Filter
CLEANING UNIT
8-1. Cleaning Unit
8-2. Cleaning Bias

TONER HOPPER
9-l.
9-2.
9-3.
9-4.
9-5.
9-6.

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

Toner Hopper Locking/Unlocking
Toner Replenishing
Shutter
Toner Hopper Home Position Detection
Toner Bottle Vibration
Toner Replenishing Control

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1

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

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

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

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

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

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

G-l
G-4
G-5

G-6
G-7

M-l
M-2
M-4
M-5
M-10

M-11
M-12
M-13
M-13

M-l 4
M-15
M-17
M-18
M-19
M-19
M-20
M-20
M-21

M-22
M-22
M-22

..M-2 3

M-23
M-24
M-25

i

CONTENTS

10.

DRUM CHARGING

11. IMAGE ERASE LAMP

12. OPTICAL SECTION
12-1.

Exposure Lamp LA1

12-2.

AESensor............................................M-3

Lamp Reflectors

12-3.
12-4.

Aperture Plates

12-5.

1

st/2nd

12-6.

4th Mirror Movement

12-7.

Lens Movement

13. MAIN

14. IMAGE TRANSFER AND PAPER SEPARATION

15. PAPER SEPARATOR FINGERS

16. PAPER TAKE-UP/FEED SECTION

17. VERTICAL PAPER TRANSPORT . . . . . . . . . . . . n . m , . m . . . . . . . , . . , M-52

ERASE LAMP

16-1.

Edge Guide and Trailing Edge Stop
Drawer Positioning

16-2.

16-3.

Paper Lifting Plate
Drawer-in-Position Detection

16-4.
16-5.

Universal Tray Paper Size Detection

16-6.

Paper Empty Detection

16-7.

Paper Separating Mechanism

16-8.

Paper Take-Up Roll

16-9.

Paper Take-Up Retry Control

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

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

Scanner Movement

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M-26

M-27
M-30

M-31
M-33

M-33
M-34
M-36
M-37

M-38
M-39
M-41
M-43

M-44
M-45
M-45
M-46
M-47
M-48
M-49
M-50
M-51

2

-

18. SYNCHRONIZING ROLLERS
18-l. Upper Synchronizing Roller Positioning

18-2. Paper Dust Remover
18-3. Synchronizing Roller Drive

19. PAPER TRANSPORT

20. FUSING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . M-57

20-l.

Fusing Temperature Control

20-2.

Fusing Rollers Pressure Mechanism

20-3

Oil Roller/Cleaning Roller

21

m

EXIT

UNIT

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

21-1,

Upper/Lower Separator Fingers

21-2,

Paper Exit Sensor

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

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

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

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

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

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

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

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

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

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

M-53
M-54

M-54
M-55

M-56

M-58
M-59
M-59

M-60
M-60

M-61

ii

-

CONTENTS

22. DEHUMIDIFYING SWITCH (OPTION)

23. MULTI BYPASS TABLE MB-4 (OPTION)
23-1. Paper Take-Up Mechanism
23-2. Paper Separating Mechanism
23-3. Paper Empty Detection

24. COOLING FAN

25. OPTICAL SECTION COOLING FAN

26. MEMORY BACKUP

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M-62
M-63

M-64
M-66
M-67

M-68
M-69

M-70

/-MEMO

GENERAL

1158SBGDlOOA

SPECIFICATIONS

)

TYPE
PHOTOCONDUCTOR :
COPYING SYSTEM

PAPER FEEDING
SYSTEM

EXPOSURE SYSTEM
DEVELOPING SYSTEM
CHARGING SYSTEM

IMAGE TRANSFER
SYSTEM

PAPER SEPARATING

SYSTEM
FUSING SYSTEM

PAPER DISCHARGING

SYSTEM

MAXIMUM ORIGINAL
SIZE

COPY MEDIUM

Plain paper

,_
B

z

E

=

(60 to 90

Translucent paper

.

Transparencies

(91 to 157

Recycled paper

g/m2)

Thick paper

g/m2)

Desktop (with Stationary Platen)
Organic Photoconductor
Electrostatic Dry Powdered Image Transfer to Plain

:

Paper
2-Way Feeding Paper Drawer: Universal Tray

:

Manual Bypass Table

Mirror Scanning, Slit Exposure

:

Minolta New Micro-Toning System

:

Comb Electrode DC Negative Corona with Scorotron

:

System
Visible Image Transfer by means of a Single-Wire DC

:

Negative Corona with Corotron System

Single-Wire AC Corona with Corotron System, plus

:

Paper Separator Finger

:

Heat Roller

:

Charge Neutralizing Brush

Metric-A3L; Inch-l

:

(Automatic feeding) (Single-sheet feeding)

1

x

17L

Paper Drawer

0 0

-

-

0 0

(250 sheets of paper)

(L: Lengthwise)

Manual Bypass

0
0

0

:

*-

2
E

I_

0

0: Permissible

(Width Maximum x Length)

(Width x Length)

Minimum

X: Not permissible

297x432 mm

140x182mm

G-l

297x432 mm

100x140 mm

MULTIPLE COPIES

WARMING-UP TIME

FIRST COPY TIME

:

1to99

:

30 sec.

or less

power voltage

:

A4C

or 8-l

(in

Full size Mode using 1 st Drawer)

with

room temperature of

/2

x 11 C: 7.2 sec. or less

20C

and rated

CONTINUOUS COPY SPEED

A3L

Metric

w

L: Lengthwise; C: Crosswise

ZOOM RATIOS

A4L
A4C

B4L

Full Size

Fixed

Variable

LENS
EXPOSURE LAMP

Reduction

Enlargement

50%to

FUSING

TEMPERATURE

(copies/min.):

Europe (Metric) Taiwan (Metric)

200% (in 1% increments)

:

Through Lens (F = 8.0, f = 180 mm)

:

Halogen Frost Tube Lamp

:

195C

Fed from Drawer

Inch

100% 100%

81% 81%

70%
50% 50%

115% 122%
141% 141%

200% 200%

11" x 17" (L)

8-l/2"

x

8-l/2"

5-l/2"

11"(L)

x

11"(C)

x 8-1/2"(L) 15

70%

x1.00

11
15
15

Inch

100%

78%
64%
50%

121%
129%
200%

G-2

POWER/CURRENT CONSUMPTION (Copier Only)

Exposure

Voltage

115V

120v

127V
220 v

240 V

POWER
REQUIREMENTS

ENVIRONMENTAL CONDITIONS

Temperature
Humidity
Ambient Illumination
Levelness

Lamp

(Rating)

80 V

225 W

160V

240 W

Fusing
Heater

Lamp

(Rating)

115/120

900 w

115/120

900 w

220/240

900 w

:

115V,120V,127V,220V,240V;50/60Hz

)

10 to 35C with a fluctuation of 10C or less per hour

1

15 to 85% RH with a fluctuation of 10% RH or less per hour

1

3,000

lux

or less

I lY1.75 mm/l 00

Max. Power

Consumption

v

1180

1220

V

1290

V 1195

1270

mm)

In Standby Current

W

w
w
w

W

935 w
965 W

1070 w

930 w

1060 W

Max.

Consumption

10.4A

10.4A

5.6 A

I

I
I

I
I

DIMENSIONS
(Copier Only)

WEIGHT

STANDARD
ACCESSORIES

Width . . . . 610

Depth . . . .

mm

632.5 mm

Height . . . 401 mm (including Original Cover)

51 kg (excluding the Manual Bypass Table, starter,
toner, and paper)

Operators Manual

*I,

Setting-up Instructions, Starter**, Copy

Tray, Manual Bypass Table, Auxiliary Cap

1: Except Europe and Taiwan

*2;

Europe only

G-3

1151Si3G0200A

PRECAUTIONS FOR INSTALLATION

1

I InstallatCon

Site

To ensure safety and utmost performance of the copier, the copier should NOT be
used in a place:

0

Where it will be subject to extremely high or low temperature or humidity.

0

Which is exposed to direct sunlight.

0

Which is in the direct air stream of an air conditioner, heater or ventilator.

0

Which puts the operator in the direct stream of exhaust from the copier.

0

Which has poor ventilation.

0

Where ammonia gas might be generated.

0

Which does not have a stable, level floor.

0

Where it will be subject to sudden fluctuations in either temperature or humidity.

If a cold room is quickly heated, condensation forms inside the copier, resulting in
blank spots in the copy.

0

Which is near any kind of heating device.

0

Where it may be splashed with water.

0

Which is dirty or where it will receive undue vibration.

0

Which is near volatile flammables or curtains.

H

Power Source

Use an outlet with a capacity of

115/l

20/l

27V, 13.2A

or more, or

200/220/24OV,

8.1 A
or more.

0

If any other electrical equipment is

sourced

from the same power outlet, make sure

that the capacity of the outlet is not exceeded.

0

Use a power source with little voltage fluctuation

0

Never connect by means of a multiple socket any other appliances or machines

to the outlet being used for the copier.

0

Make the following checks at frequent intervals:

l

Is the power plug abnormally hot?

l

Are there any cracks or scrapes in the cord?

l

Has the power plug been inserted fully into the outlet?

l

Does something, including the copier itself, ride on the power cord?

0

Ensure that the copier does not ride on the power cord or communications cable

of other electrical equipment, and that it does not become wedged into or under­neath the mechanism.

1

Grounding

To prevent receiving electrical shocks in the case of electrical leakage, always ground
the copier.

l

Connect the grounding wire to:

l

The ground terminal of the outlet.

l

A grounding contact which complies with the local electrical standards.

0

Never connect the grounding wire to agas pipe, the grounding wire for a telephone,

or a water pipe.

G-4

1151 SSG0300A

PRECAUTIONS FOR USE

To ensure that the copier is used in an optimum condition, observe the following pre­cautions.

0

Never place a heavy object on the copier or subject the copier to shocks.

0

Insert the power plug all the way into the outlet.

@

Do not attempt to remove any panel or cover which is secured while the copier is

making copies.

0

Do not turn OFF the Power Switch while the copier is making copies.

0

Provide good ventilation when making a large number of copies continuously.

0

Never use flammable sprays near the copier.

0

If the copier becomes inordinately hot or produces abnormal noise, turn it OFF and

unplug it.

0

Do not turn ON the Power Switch at the same time when you plug the power cord

into the outlet.

0

When unplugging the power cord, do not pull on the cord; hold the plug and pull

it out.

0

Do not bring any magnetized object near the copier.

l

Do not place a vase or vessel containing water on the copier.

0

Be sure to turn OFF the Power Switch at the end of the workday or upon power

failure.

0

Use care not to drop paper clips, staples, or other small pieces of metal into the

copier.

n

Operating Environment

The operating environmental requirements of the copier are as follows,

l

Temperature: 10C to 30C with a fluctuation of

l

Humidity: 15% to 85% RH with a fluctuation of

10C

10%

RH per hour

per hour

H

Power Requirements

The power source voltage requirements are as follows.

l

Voltage Fluctuation:

AC1

15/l

20/l

27/220/24OV

f

10% (Copying performance assured)

-15% (Paper feeding performance assured)

l

Frequency Fluctuation:

50/60

Hz

-+0.3%

G-5

1151SBG0400A

HANDLING OF THE CONSUMABLES

Before using any consumables, always read the label on its container carefully.

0

Use the right toner. The applicable copier model name is indicated on the Toner

Bottle.

1

l Paper is apt to be easily damaged by dampness. To prevent absorption of

moisture, store paper, which has been removed from its wrapper but not loaded
into the Drawer, in a sealed plastic bag in a cool, dark place.

0

Keep consumables out of the reach of children.

0

Do not touch the PC Drum with bare hands.

0

Store the paper, toner, and other consumables in a place free from direct sunlight

and away from any heating apparatus.

0

The same sized paper is of two kinds, short grain and long grain. Short grain paper

should only be fed through the copier crosswise, long grain paper should only be

fed lengthwise.

0

If your hands become soiled with toner, wash them with soap and water

immediately.

0

Do not throw away any used consumables (PC Drum, starter, toner, etc.). They are

to be collected.

NOTE

Do not burn, bury in the ground, or throw into the water any
consumables (PC Drum, starter, toner, etc.).

G-6

1158SBG0500A

11420010AA

1. Multi

Bypass

Table MB-4

G-7

MECHANICAL/

ELECTRICAL

1158SBMOlOOA

CROSS-SECTIONAL

234 5

VIEW

6 7 6

1

9

10

L

'

14

15

,,/

/

16,

1.

3rd Mirror
2nd Mirror

2.

3.

1st Mirror

4.

Exposure Lamp LA1

5.

Lamp Reflector

6.

Lens

7.

Cleaning Blade
PC Drum Charge Corona

8.

9.

Image Erase Lamp LA3
4th Mirror

10.

PC Drum

11.

12.

Sleeve/Magnet Roller

17

/

13.

14.

15.

16.

17.

I

16

Synchronizing Roller
Transport Roller

Paper Take-Up Roll
Drawer
Image Transfer/Paper Separa-

1158MOOlYB

tor Coronas

18.

Suction Unit

19.

Cleaning Roller

20.

Oil Roller

21.

Upper/Lower Fusing Roller

22.

Paper Exit Roller

M-l

1158SBM0200A

COPY PROCESS

1.

PC DRUM

2.

DRUM CHARGING

3.

IMAGE ERASE

4. EXPOSURE

5.

DEVELOPING

6.

PAPER FEEDING

7.

IMAGE TRANSFER

1

6.

PAPER SEPARATION

9.

CLEANING

10.

MAIN ERASE

Il.

TRANSPORT

12.

FUSING

13.

PAPER EXIT

I

1139M002AA

1. PC Drum

The PC Drum is an aluminum cylinder coated with a photosensitive semiconductor.
It is used as the medium on which a visible developed image of the original is formed.

(For more details, see p. M-l 0.)

2. Drum Charging

The PC Drum Charge Corona Unit is equipped with a Comb Electrode and a Scorotron Grid to

deposit a uniform negative charge across the entire surface of the PC Drum.

(For more details, see p. M-26.)

3. Image Erase

Any areas of charge which are not to be developed are neutralized by lighting up

(For more details, see p. M-27.)

LEDs.

4. Exposure

Light from the Exposure Lamp reflected off the original is guided to the surface of the PC
Drum and reduces the level of the negative charges, thereby forming an electrostatic latent
image.

(For more details, see p. M-30.)

5.

Developing

Toner positively charged in the Developer Mixing Chamber is attracted onto the electrostatic
latent image changing it to a visible, developed image. A DC negative bias voltage is applied
to the Sleeve/Magnet Roller to prevent toner from being attracted onto those areas of the PC
Drum which correspond to the background areas of the original.

(For more details, see p. M-l 4.)

6. Paper Feeding

Paper is fed either automatically from the 1 st or 2nd Drawer, or manually via the Manual
Bypass Table. The Drawer has fingers that function to separate the top sheet of paper from
the rest at take-up.

(For more details, see p. M-43.)

7. Image Transfer

The single-wire Image Transfer Corona Unit applies a DC negative corona emission to the
underside of the paper, thereby attracting toner onto the surface of the paper.

(For more details, see p. M-30.)

8. Paper Separation

The single-wire Paper Separator Corona Unit applies an AC corona emission to the underside
of the paper to neutralize the paper. In addition, mechanical paper separation is provided by
the two PC Drum Paper Separator Fingers fitted to the Imaging Unit.

(For more details, see p. M-30)

9. Cleaning

Residual toner on the surface of the PC Drum is scraped off by the Cleaning Blade.

(For more details, see p. M-20.)

10. Main Erase

Light from the Main Erase Lamp neutralizes any surface potential remaining on the surface of
the PC Drum after cleaning.

(For more details, see p. M-38.)

11. Transport

The paper is fed to the Fusing Unit by the Suction Belts.

(For more details, see p. M-56.)

12. Fusing

The developed image is permanently fused to the paper by a combination of heat and
pressure applied by the

(For more details, see p. M-57.)

Upper

and Lower Fusing

Rdlers.

13. Paper Exit

After the fusing process the paper is fed out by the Paper Exit Roller onto the Copy Tray.

(For more details, see p. M-60.)

M-3

1158SBM0300A

DRIVE SYSTEM

1

This copier is equipped with two main drive motors, PC Drive Motor Ml that drives
the upper half of the copier (Imaging Unit) and Main Drive Motor M2 which gives
drive for the lower half of the copier (paper take-up/feeding and transport
mechanism and Fusing Unit). Each has its own drive transmitting gears and timing
belts as illustrated below.

Drive Train for Lower Half of Copier

Paper Exit Roller Driv

Roller Drive

n Drive Motor M2

+

Coupled to Paper
Take-Up Unit

Synchronizing Roller Clutch CL

Paper Transport

Clutch CL 2

Drive Train for Upper
Half of Copier

1151MOOlVB

Drive Train for

w

Paper Take-Up Unit

Coupled to Copier Gear

Vertical

Transport Roller

per Drawer Paper



PC Drive Motor Ml

1

PC Drum Drive

1139MOO5AA

1142M002AA

1158SSM0400A

SEQUENTIAL EXPLANATION

)

*Numbers given in rectangles0

A

The power cord is plugged into the outlet.

)

Power cord is plugged in.

DC24V

for Drum heating (PU2)

Drum Dehumidifying
Heater H2

Paper Dehumidifying
Heater H3

6 Power Switch Sl is turned ON.

z

H2

ON

-

DC5V

(PWB-C)

ON

-

DC24V

(PU2)

ON

------ Control panel
ON

l

The Cooling Fan turns at full speed.
Approx. 3
Approx. 0.5

ON

c

Scanner Reference Position Sensor PC81

If the Scanner

M5 is energized to move the Scanner to the home position.

ON

+

Lens Reference Position Sensor PC90

*If the Lens is not at the home position, Lens Motor M6 is

energized to move the Lens to the home position.

ON

c

Mirror Reference Position Sensor PC86

*If the 4th Mirror is not at the home position, Mirror Motor M7

is energized to move the Mirror to the home position.

in the following flowchart are timer values in sec.

ON

~-The

ON

h

Fusing Heater Lamp Hi

is not at the home position, Scanner Motor

Only when Serviceman
Switch 53 is ON

Cooling Fan turns at half speed.

__.

Starter setup and ATDC Sensor automatic adjustment

*Only when the Imaging Unit is new.

when the starter setup sequence is completed normally.

I/U

Fuse F4 blows

M-5

C

The Fusing Unit temperature reaches 205%.

1 Fusincl

Thermistor THI detects

L-

oNoFFFusing Heater Lamp HI

*The Fusing Unit temperature control is started.

2OCPC.

1

M-6

D

The Start Key is pressed.

1

Start Key ON

ON
ON
ON

ON

ON
ON
ON

ON

1

PC Drive Motor Ml

Main Erase Lamp LA2
Main Drive Motor M2

Image Erase Lamp LA3

*All

LEDs

are turned ON.
Developing Bias (High Voltage Unit HVI)
Paper Separator Corona (HVI)
Cleaning Bias

*Some models have no Bias Seal installed depending

on their marketing areas.

Synchronizing Roller (CLI) *For approx 0.2

(HVl)

Paper Take-Up Roll (Solenoid SL2)

set

only

t=LL=b

psi=-+

E

Paper is taken up.

Paper Take-Up Solenoid SL2 ON

APProx.ON e Drawer Paper Take-Up Sensor PC55

0.4

APProx. 0.7

SL2

PC Drum Charge Corona/Image Transfer

Corona

(iv,)

Transport Roller (Paper Transport Clutch CL2)

Synchronizing Roller

ON c

Transport Roller Sensor PC51

- APProx. 3

0.5

- APProx. a

0.2

(CLl)

Paper Leading Edge

Detecting Sensor PC54

- APProx. z

0.2

Exposure Lamp LA1

Paper

Transport
Clutch CL2

M-7

APProx. ON c

0.6

Scanner Motor

OFF

c

Scanner Reference Position Sensor PC81

M5

- APProx. -

0.3

1

F 1 A scan motion is completed.

1 SCFND

signal: LOW

-

Approx.

0.3

- APProx.ON t Scanner Reference Position Sensor PC81

*For A4 crosswise, x 1 .OOO

Image Erase Lamp LA3

_

Approx. ON .

1

LEDs

*

Scanner starts return motion.

0.6

LEDs

ON/OFF

trol is started.

Synchronizing Roller Clutch

-

ON

CL1

CL2

Separator Fingers
(Separator Solenoid

0.2

of Unexposed Areas/Edge Erase Lamp LA3

con-

7-p

Exposure Lamp

M-8

LA1

G

The last paper moves past Transport Roller Sensor

PC51 OFF

7

)

0.6

T

1

Paper Leading Edge Detecting Sensor PC54

Synchronizing Roller (Synchronizing

1-p

Roller Clutch

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

OFF

I-

PC51.

CLl)

PC Drive Motor Ml
Main Erase Lamp LA2

Unexposed Areas/Edge

Erase Lamp LA3
Developing Bias
Cleaning Bias

*Some models have no Bias Seal

installed depending on their
marketing areas.

OFF

I-

Paper Separator Corona

iAl;p:oxp

~=Gfp_

I

H 1 The paper moves past Paper Exit Sensor PC53.

Lpqy

I

Main Drive Motor M2

Transport Roller (CL2)

Paper Exit Sensor PC53

(HVl)

(HVl)

(HVI

)

M-9

1151SBM0500A

~7ciii-l

The photoconductive drum used in this copier is the organic photoconductor (OPC)
type. The drum is made up of two distinct, semiconductive materials on an alumi­num alloy base. The outer of the two layers is called the Charge Transport Layer
(CTL), while the inner layer is called the Charge Generating Layer (CGL).

The PC Drum has its grounding point inside 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. It must therefore be protected from light by a clean, soft
cloth whenever the Imaging Unit 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

Plate

PC Drum

.

Gear

_

CTL

1139M006AA

Grounding Point

r

!iiiL--

1139MCWAA

PC Drum Drive Coupling Gear

r

M-10

1139SBhAO6OOA

IMAGING UNIT

This copier is equipped with an Imaging Unit, or IU, which integrates a PC Drum
PC Drum Charge Corona, Developing Unit, Cleaning Unit, and Toner Recyclini
mechanism into
Roller which facilitates clearing of a paper misfeed.

one

assembly. The Unit also includes the Upper Synchronizing

Corona Unit Cleaning/PC Drum
Lever

Charge Corona

Toner Supply Port

Paper Separator Fingers

Coupled to Gear
in Copier

1139MOlOAA

Paper Guide Plate

Upper Synchronizing Roller

t

1139MOllAA

1139SBM0601A

6-1. Imaging Unit Drive

Drive for the Imaging Unit is transmitted by one of the gears on the Unit.

This particular gear is in mesh with the Imaging Unit Drive Gear in the copier.

Developer Mixing Screw Drive Gear

/

Bucket Roller Drive Gear

Sleeve/Magnet Roller

Coupling (in Copier)

Toner Recycling Ceil

Drive Gears