DOWNLOAD Sharp MX-M950 / MX-MM1100 (serv.man21) Service Manual ↓ Size: 3.63 MB | Pages: 13 in PDF or view online for FREE

MX-M1100  PHOTOCONDUCTOR SECTION  i – 5

Residual toner on the OPC drum is removed by the cleaning roller
and cleaning blade. 
The residual toner removed from the OPC drum surface is trans-
ported to the waste toner collection section by the waste toner
transport screw. 
The cleaning blade oscillates back and forward in synchronization
with the drum drive motor. By this movement, the cleaning perfor-
mance is improved. 

TLS

TLS

DM

DM

1

1

1

1

2

2

3

3

2

2

3

3

TLS

1

1

TLS

1

GND2

2

2

GND2

2

+5V_TLS

3

3

+5V_TLS

3

SMP-03V-NC/SMR-03V-N

9

+5V_TLS

9

10

TLS

10

11

DF1B-28DEP-2.5RC

DF1B-28DEP-2.5RC

GND2

11

3

B40B-PNDZS-1

CN-3

+5V_TLS

5

TLS

7

GND2

13

GND2

B40B-PNDZS-1

CN-21

15

+5V_C

17

XDM

19

DMCLK

21

DM-T

PCU PWB

3

GND1

8

+38V0

HL PWB

38V0

1

GND1

2

GND2

1

+5V_C

2

XDM

3

DMCLK

4

DM-T

5

5 GND1

5

6

SMR-10V-N/SMP-10V-NC

+38V0

6

B10B-PASK-1(LF)(SN)

CN7

1

OPC drum cleaning blade

Removes unnecessary residual toner from the OPC drum for cleaning. 

2

OPC drum cleaning brush roller 

Removes unnecessary residual toner from the OPC drum for cleaning.

3

Waste toner transport screw 
(OPC drum cleaning section)

Transports waste toner in the transfer unit to the waste toner collection section. 

DM

OPC drum motor

Drives the OPC drum cleaner section. 

DC brush-less motor

TLS

Waste toner jam sensor

Detects locking of the transport screw.

Transmission type photo sensor

DM

MX-M1100  PHOTOCONDUCTOR SECTION  i – 6

In this section, light is exposed onto the OPC drum to discharge the whole surface of the OPC drum. 

When the discharge lamp light is expose the OPC drum CGL layer,
positive and negative charges are generated. Positive charges
generated in the CGL are attracted by negative charges on the
OPC drum surface. 
On the other hand, negative charges are attracted by positive
charges in the aluminum layer of the OPC drum. 
Therefore, positive charges and negative charges are counterbal-
anced on the surface and in the aluminum layer of the OPC drum to
reduce positive and negative charges, lowering the potential of the
whole surface of the OPC drum. 
As a result, the surface potential of the OPC drum is reset to the ini-
tial level. 

DL1

Discharge lamp

Discharges the residual potential on the OPC drum. 

LED

PTDL1

PTDL1

PTDL1

PTDL1

DL1

DL1

DL1

DL1

3 +24V_DL

3

4 XDL1

4

1 +24V_DL
2 (NC)
3

SMR-07V-B/SMP-07V-BC

XDL1

+24V_DL

36B-PNDZS-1

CN-9

4

3 +24V_DL

3

XDL1

5

4 XDL1

4

PCU PWB

OPC drum

CTL
CGL
Aluminum
layer

DL1

MX-M1100  PHOTOCONDUCTOR SECTION  i – 7

* When disassembling or assembling the process unit, remove the

OPC drum unit by the following and keep it for a while.

1)

Remove the blue screw (a), and open the frame (b).

2)

Remove the OPC drum unit.

3)

Turn back the cover (a) that have been removed in step 2) of
"(1)-Process unit" procedure, and put the OPC drum unit on
the cover.
When putting the OPC drum unit on the cover, in advance
remove the bearing, place it according to "F" and "R" marked
on the cover (a).
Cover the OPC drum unit with paper to prevent exposure.

1)

Open the front cover (a), and pull out the toner tray (b) slightly.

Process unit

A

Process control sensor

i -9/a

B

Discharge lamp

C

Temperature humidity sensor 1

i -9/b

D

Surface potential sensor

E

PTDL  PWB

F

DL PWB

i -10/c

G

Separation solenoid

i -11/d

B

G

E

D

C

A

F

a

a

b

a

a

a

b

MX-M1100  PHOTOCONDUCTOR SECTION  i – 8

2)

Remove the screw (a), and remove the cover (b).

3)

Remove the blue screw (a), and remove the plate (b).

4)

Slide the developing unit (a) to the right, and pull it out until the
grip (b) can be held. 

5)

Hold the handle (a) of the developing unit, and lift it up to
remove completely.
* When placing the developing unit on a floor, use the stand

(b) and put the unit on it.

6)

Disconnect the connector (a), and remove the blue screw (b). 
Pull out the main charger unit (c).

7)

Remove the blue screw (a). Remove the bearing (b) and the
bearing (c).
* When installing the bearing, fit the D-cut direction and

engage it properly.

a

a

b

a

a

a

b

a

b

b

a

b

c

a

c

b

a

a

a

d

d