MX-4100N, MX-4101N, MX-5000N, MX-5001N (serv.man28). Service Manual-Details Of Each Section-(I)Photoconductor Section - Sharp Copying Equipment Service Manual (repair manual)

MX-4101N  PHOTOCONDUCTOR SECTION  i – 1

MX-4101N

Service Manual

 

DL_BK

DL_C

DL_M

MC

GB

DVM_CL

DVM_K

DL_Y

GB

GB

GB

2

1

2

MC

MC

MC

1

1

1

PHNR-10-H+B

U

10P-TR-P-H

CC

N

1

0

PHNR-10-H+B

U

10P-TR-P-H

PHNR-10-H+B

U

10P-TR-P-H

PHNR-10-H+B

U

10P-TR-P-H

B

4

0

B

-P

A

D

S

S

-1

PCU PWB

2

23

D-GND

NC

2

NC

2

1

1

4

/DL_M

3

1

0

D-GND

22

/DL_Y

24

D-GND

/DL_M

2

D-GND

1

/DL_C

21

1

3

1

2

/DL_BK

1

D-GND

/DL_C

9

/DL_Y

1

/DL_Y

3

1

0

D-GND

NC

/DL_BK

9

1

10

3

9

D-GND

/DL_C

D-GND

1

D

-GND

D-GND

/DL_BK

3

1

0

D-GND

2

2

9

D

-GND

2

/DL_M

NC

2

CN1

C

N

6

MC-K

GB-K

GB-C

B8B-P

ASK

B

3

2

B

-P

H

D

S

S

GB-M

GB-Y

MC-CL

/HV_D

A

T

A

3

4

8

/HV_D

A

T

A

7

INT24V2

D-GND

INT24V2

/HV_CLK

6

5

1

31

19

2

M

C_CL_ERR

17

MC_BK_ERR

D-GND

27

29

HV_REM

25

/HV_CLK

23

/HV_LD

21

HV_REM

MC PWB

MC_CL_ERR

MC_BK_ERR

/HV_LD

C

N

1

1

VM_CL

B

1

8

B

-P

H

D

S

S

NC

6

NC

6

3

/D

VMC_CK

INT24V2

P-GND

D

V

MC_LD

NC

7

6

D

V

MK_LD

3

NC

5

7

3

4

1

2

/D

VMC_D

D

V

MK_LD

/D

VMK_CK

/D

VMK_D

1

2

4

INT24V2

P-GND

5

7

/D

VMK_D

INT24V2

P-GND

10

8

/D

VMC_CK

INT24V2

2

4

/D

VMK_CK

5

9

1

P-GND

/D

VMC_D

D

V

MC_LD

MX-4101N  PHOTOCONDUCTOR SECTION  i – 2

The OPC drum surface is negatively charged by the main charger.
The laser beam images are radiated to the OPC drum surface by
the laser (writing) unit to form latent electrostatic images.
1)

The OPC drum surface is negatively charged by the main
charger.

The main charger grid is provided with the screen grid. The
OPC drum is charged at a voltage virtually same as the volt-
age applied to the screen grid.

2)

Laser lights are radiated to the OPC drum surface by the laser
(writing) unit to form latent electrostatic images.

When laser lights are radiated to the OPC drum CGL, negative
and positive charges are generated.
Positive charges generated on the CGL are attracted by the
negative charges on the OPC drum surface. On the other
hand, negative charges are attracted by the positive charges in
the aluminum layer of the OPC drum.
Therefore, positive charges and negative charges are bal-
anced out on the OPC drum and in the aluminum layer, reduc-
ing positive and negative charges to decrease the OPC drum
surface voltage.
Electric charges remain at a position where laser lights are not
radiated.
As a result, latent electrostatic images are formed on the OPC
drum surface.

3)

After transfer operation, remaining toner is removed by the
cleaning blade.
Toner removed from the OPC drum surface is transported to
the waste toner section by the waste toner transport screw.

DVM_CL

Developing drive motor (Color)

Color developing unit/Color drum drive

DVM_K

Developing drive motor (Black)

Black developing unit/Black drum drive

DL

Discharge lamp (Y,M,C,BK)

Light is radiated to the discharge lamp to discharge the OPC drum surface.

MC

Main charger (Y,M,C,K)

The OPC drum surface is charged negatively.

GB

Grid (Y,M,C,K)

The OPC drum surface potential is controlled.

1

OPC drum (Y,M,C,K)

Latent electrostatic images are formed.

2

Cleaning blade

Cleans and remove residual toner from the OPC drum surface.

Aluminum

layer

OPC drum

CTL

CGL

High voltage unit

Main corona unit

Screen grid

Aluminum
layer

OPC drum

OPC drum

CGL
CTL

Laser beams

MX-4101N  PHOTOCONDUCTOR SECTION  i – 3

4)

The whole surface of the OPC drum is discharged.

By radiating the discharge lamp light to the discharge lens,
light is radiated through the lens to the OPC drum surface.
When the discharge lamp light is radiated to the OPC drum
CGL, positive and negative charges are generated.
Positive charges generated on the CGL are attracted by the
negative charges on the OPC drum surface. On the other
hand, negative charges are attracted by the positive charges in
the aluminum layer of the OPC drum.
Therefore, positive and negative charges are balanced out on
the OPC drum surface and in the aluminum layer, reducing
positive and negative charged to decrease the surface voltage
of the OPC drum.

1)

Open the front cover.

2)

Remove the waste toner box unit.

3)

Loosen the blue screw. Check to confirm that the lock is
released, and open the drum positioning unit.

(CAUTION)
When the transfer belt tension of the primary transfer unit is
manually released, turn the power OFF/ON after completion of
the operation. This procedure initializes the transfer roller to
return it to the home position.

4)

Open the DV lock lever, and release the fixing screw.
(1position for each color)

CGL

CGL

Aluminum
layer

Aluminum
layer

CTL

CTL

Lens

MX-4101N  PHOTOCONDUCTOR SECTION  i – 4

5)

Pinch the knob and remove the development unit.

6)

Hold the lock lever and pull out each drum unit slowly. 
Hold the lower section of the unit and remove it with both
hands.

1)

Remove the frame cover.

2)

Disconnect the connector and remove the screw, and remove
the waste toner drive unit.
Remove the screw, and remove the waste toner drive motor
from he waste toner drive unit.

1)

Remove the frame cover.

2)

Disconnect the connector and remove the screw, and remove
the waste toner drive unit.  

3)

Remove the screw and the spring, and remove the waste toner
box instillation lever.
Disconnect the connector and disengage the pawl. Remove
the waste toner full detection switch.

a

Waste toner drive motor

b

Waste toner full detection switch

a

b