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MX-4101N  MAINTENANCE  8 – 9

✕

: Check (Clean, replace, or adjust according to necessity.) {: Clean S: Replace U: Adjust ✩: Lubricate

Color items

Monochrome items

1

Toner filter

Supply

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [22]-37)

2

DV blade

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [22]-22)

3

DV side seal F/R

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [23]-26, [23]-15)

4

Developer (Y)

-

S

S

S

S

S

S

S

S

S

S

S

Developer (M)

-

S

S

S

S

S

S

S

S

S

S

S

Developer (C)

-

S

S

S

S

S

S

S

S

S

S

S

5

Bias pin/Connector

Mechanical 
parts

-

✕

✕

✕

✕

✕

✕

✕

✕

✕

✕

✕

1

Toner filter

Supply

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [22]-37)

2

DV blade

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [22]-22)

3

DV side seal F/R

-

S

S

S

S

S

S

S

S

S

S

S

(P/G No.: [23]-26, [23]-15)

4

Developer

-

S

S

S

S

S

S

S

S

S

S

S

5

Bias pin/Connector

Mechanical 
parts

-

✕

✕

✕

✕

✕

✕

✕

✕

✕

✕

✕

1

5

4

2

5

3

3

MX-4101N  MAINTENANCE  8 – 10

(Note for servicing the DV roller)
1. Prevention of oily dirt attachment
[Note]
• Be careful not to attach fingerprints or oily dirt on the DV roller

surface.

• When rotating the DV roller manually, hold the drive gear section

to rotate it.

[Countermeasures]
If a fingerprint is attached to the DV roller surface erroneously, per-
form the following countermeasures.
1)

Remove developer from the DV unit, and clean and remove
toner and developer on the DV roller as well.

2)

Remove oily dirt on the DV roller with alcohol.
In that case, if alcohol is used without removing toner and
developer from the DV roller surface, that toner and developer
will be diluted, resulting in error images of diluted toner and
developer on print paper. Therefore, be sure to remove toner
and developer from the DV roller surface in advance to use
alcohol.

3)

When alcohol dries out completely, supply developer.

[Check method]
Check to confirm that the DV roller is free from fingerprints or oily
dirt and that cleaning is completely executed or not by the following
method.
• Make a print of a half tone image on all the surface of A4 (11" x

8.5") paper, and check the printed paper for any abnormality in
the image.

1)

Remove the front cabinet.

2)

Remove the waste toner box.

3)

Check that the lock is released as shown in (A).
Loosen the blue screw, and open the drum positioning unit.
* When the lock is not released, use a screwdriver to turn the

screw (B) counterclockwise so that it is fit as (A).

4)

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

Rotate this section manually.

MX-4101N  MAINTENANCE  8 – 11

5)

Pinch the knob and remove the development unit.

6)

Remove the screws.

7)

Hold the sections (A), and remove the DV cover in the arrow
direction (B).

8)

Take out the developer.

9)

Remove the cover and the toner filter.
Maintenance: Replace at every 100K (color) or every 150K
(monochrome).

10) Remove the DV blade.

Maintenance: Replace at every 100K (color) or every 150K
(monochrome).

* When attaching, use alcohol to remove oil from the attached

surface, and fit with the reference. 

11) Remove the DV side seal F/R.

Maintenance: Replace at every 100K (color) or every 150K
(monochrome).

A

A

B

A

0

㨪0.3mm

0

㨪0.3mm

MX-4101N  MAINTENANCE  8 – 12

* When attaching, use alcohol to remove oil from the attached

surface, and fit with the reference so that the DV side seals
F and R are inserted between the DV cover R (A) and the
DV blade (B).

12) Insert the new developer.

Maintenance: Replace at every 100K (color) or every 150K
(monochrome).

NOTE: When replacing developer, use an extreme care not to drop

developer on the drive section (marked with {).

NOTE: Note for cleaning the developing unit If the developing unit

is cleaned with a cleaner or an air blower with much devel-
oper in the developing unit, static electricity may be accu-
mulated in the unit. In order to prevent against this, note
the following items.
* metal part is brought into contact with the magnet roller

surface when transporting developer or removing foreign
material from the magnet roller, developer may adhere to
the magnet roller surface. Be careful to avoid this when
handling the magnet roller.

* Remove developer in the development unit as well as

developer attached to the magnet roller as far as possi-
ble.

NOTE: When cleaning the developing unit with an air blower [duct]

Before cleaning with an air duct, remove developer from
the unit as far as possible, and ground the magnet roller
rear side cored bar as shown in the figure below and clean
the unit with an air blower. (Do not pinch the grounding wire
with a crocodile clip connector in order to prevent against
damage on the cored bar.)

NOTE: After supplying developer, do not tilt the development unit.

0

0.3mm

㨪

0

㨪0.3mm

0

0.5mm

㨪

0

0.3mm

㨪

Magnet roller
rear side cored bar