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MX-4101N  TRANSFER SECTION  L – 1

MX-4101N

Service Manual

 

1TC_CMY

Primary transfer output (CMY)

Color transfer high voltage

1TC_K

Primary transfer output (K)

B/W transfer high voltage

1TNFD

Waste toner full detection switch

Waste toner full detection

1TUD_BK

Transfer belt separation BK detection

B/W transfer folder position detection 

1TUD_CL

Transfer belt separation CL detection

Color transfer roller position detection 

1TURC

Primary transfer separation clutch

Transfer roller separation control

1TURC_R

Primary transfer separation reverse clutch

Controls the primary transfer separation mode.

2TC

Secondary belt transfer output

Secondary transfer high voltage

BTM

Transfer belt motor

Drives the transfer belt.

DVM_K

Developing drive motor (K)

Transfer unit drive (Commonly used with the B/W developing drive roller)

WTNM

Waste toner drive motor

Transports waste toner.

PTC

PTC output

PTC high voltage

1

Primary transfer cleaner blade

Clean and remove residual toner from the intermediate transfer belt.

2

Intermediate transfer belt

Toner on the drum is transferred to form toner images on the belt. 

3

Primary transfer roller

Transfers toner images on the OPC drum to the intermediate transfer belt. 

4

Primary transfer belt drive roller

Drives the transfer belt.

5

Primary transfer belt follower roller

Transfer belt follower. 

R

SM-2Pin

P

1

24V3

1

2

1TURC_R

2

B30B-PHDSS

30

24V3

29

1TURC_R

PTC

1TUD_CL

1TC_K

2TC

1TURC

1TURC_R

1TURC_R

1TNFD

WTNM

1TC_CMY

1TUD_BK

CN12

P

SM-4pin

R

B

B30B-PHDSS

CN1

C

CN14

PTC

1

B2P-VH

2
3
4
5
6

2-TC

7

PS-187

8

B8B-PASK

B

B30B-PHDSS

CN1

C

CN6

B8B-PASK

B

B32B-PHDSS

CN1

B9B-PASK

P

SM-3Pin

R

CN13

B32B-PHDSS

2

29

/HV_DATA

2

3

4

1TC-K-CC

1TC-C-CC

8

6

27

/TC_LD

/TC_DATA

4

1TUD_CL

D-GND
5VNPD

10

PCU PWB

31

INT24V2

5VLED

PTC_HEAT

D-GND

1TUD_BK

1TUD_CL

1

5VNPD

3

5VNPD

D-GND

2

2
3

D-GND

30

1TUD_BK

27

1TUD_BK

1

/HV_DATA

PTC_HEAT

28

7

5VLED

3

29

INT24V2

D-GND

4

3

PTC_ERR

/PTC_CLK

INT24V2

1TC-M-CC

1

/HV_CLK

6
5

1

PTC_ERR

/PTC_CLK

D-GND

/HV_REM

/TC_CLK

5

31

7
9

8

1

1TUD_CL

1

19

N,C

2

HV_REM

MC_CL_ERR

17

MC_BK_ERR

D-GND

27

29

HV_REM

25

/HV_CLK

23

/HV_LD

21

HV_REM

D-GND

2

5VLED

3

4

3

/HV_REM

/TC_LD

/TC_DATA

INT24V2

D-GND

/TC_CLK

1

MC PWB

MC_CL_ERR

1

1TC-Y-CC

1TC-REV

2

D-GND

2

MC_BK_ERR

2nd TC PWB

/HV_LD

9

P-GND

INT24V2

8
7
6
5
4
3
2

CN2

B9B-PASK

1TC-K-CC

1TC-C-CC

1TC-M-CC

8

N,C

HV_REM

1TC-Y-CC

1TC-REV

9

D-GND

INT24V2

1
2
3
4
5
6
7

CN13

S

DF1B-24DE

P

B32B-PHDSS

WTNM_1
WTNM_2

19

17

2

2

1

1

WTNM_2

WTNM_1

R

P

SL2PIN

WTNM_2

2

1

1TNFD
D-GND

17
19

WTNM_1

11
13

1TNFD
D-GND

23

21

D-GND

21
23

1TNFD

7
9

CN11

R

SM-2Pin

P

NC

6

11

2

24V3

DVMK_LD

5

1TURC

1

2

15

1

NC

5
7
3

DVMK_LD

/DVMK_CK

/DVMK_D

1
2
4

INT24V2

P-GND

9

/DVMK_D

INT24V2

P-GND

/DVMK_CK

13

1

16

24V3

1TURC

1TC-K

1TC-C

1TC-M

1TC-Y

1st TC PWB

DVM_K

DVM_K

BTM

BTM

CN1

B6B-XH

B6B-PASK-1

INT24V1

INT24V1

INT24V1

2

INT24V1

3

BTM_A

1

1

6

BTM_A

4
5

BTM_A/

BTM_B/

BTM_B

4

BTM_B/

6

BTM_A/

3

2

5

BTM_B

1

7

8

4

9

10

11

13

12

2

5

8

3

6

3

MX-4101N  TRANSFER SECTION  L – 2

6

Primary transfer belt tension roller

Apply a tension to the transfer belt. 

7

Belt CL brush

Transfer belt back surface cleaning.

8

PTC opposing roller

Roller to flow a PTC current. 

9

Secondary transfer belt

Transfers toner images on the intermediate transfer belt to paper.

10

Secondary transfer roller

Transfers toner images on the intermediate transfer belt to paper.

11

Secondary transfer belt dirve roller

Drives the transfer belt.

12

Secondary transfer belt follower roller

Transfer belt follower.

13

PTC unit

Reduces the positive charges on the primary transfer belt.  

PCSS

Color image density sensor PWB 
reflection plate shutter solenoid

Opens/closes the shutter of the process control and the resist sensor.

REGS_F

Color image density sensor/
Image registration sensor F

Detection of resist shift on the machine front (F) side, and detection of the color toner patch density.

REGS_R

Black image density sensor/
Image registration sensor R

Detection of resist shift on the machine rear (R) side, and detection of the black toner patch density.

REGS_F

REGS_R

PCSS

CN6

R

SM2P

P

R

SM18P

P

B32B-PHDSS

REGS_R

4

/REGS_R_LED

3

D-GND

2

PCS_R

5

4

5VNPD

1

1

5VNPD

2

D-GND

3

D-GND

1

5VNPD

5

REGS_F

4

/REGS_F_LED

7

/REGS_F_LED

3

REGS_F

6

D-GND

NC

NC

5

5VNPD

8

PCS_CL

9

PCS_CL

7

10

5VNPD

2

5VNPD

9

D-GND

12

REGS_R

6

REGS_R

11

D-GND

4

13

/REGS_R_LED

16

NC

8

/REGS_R_LED

PCU PWB

2

/PCSS

2

14

/PCSS

11

/PCSS

1

24V3

1

15

24V3

13

24V3

17

NC

18

2
1

4
3

6
5

8
7

10

9

12
11

13

16

14

15

17

18

NC

5VNPD

1

D-GND

2

PCS_F

5

/REGS_F_LED

3

REGS_F

MX-4101N  TRANSFER SECTION  L – 3

Toner images on the OPC drum are transferred to the primary
transfer belt by applying the positive high voltage to the primary
transfer roller. 
Negative charge is generated by the PTC unit, and this weakens
positive charges on the transfer belt, reducing the attractive force
between the primary transfer belt and toner. 
By this operation, the transfer efficiency in the secondary transfer is
improved. 
Next, the positive high voltage is applied to the secondary transfer
belt, and toner images on the primary transfer belt are transferred
to paper. In the monochrome mode and the color mode, the black
(K) transfer voltage is selected. 

b. Cleaning operation
In the cleaning operation, the polarity of the applying voltage of the
secondary transfer belt is made negative, and unnecessary toner is
transferred to the primary transfer belt, and it is cleaned by the pri-
mary transfer belt cleaning blade, and transported to the waste
toner section. 

The primary transfer roller operates pressing all the rollers, sepa-
rates all the rollers, or presses only black depending on the opera-
tion mode.
When the roller separation clutch (1TURC) turns ON, the transfer
cam rotates to shift the primary transfer link and the primary trans-
fer arm linked with the cam in the arrow direction, performing sepa-
rating operation of the roller. 

It also performs all pressing, all separating, or pressing only black
with the roller separation sensors (1TUD_CL, 1TUD_BK) and the
separation detection arm. 

The primary transfer drive and the secondary transfer drive are
commonly used with the black developing motor.

PTC

Constant
current

Constant
voltage

1TUD_CL

1TUD_BK

All pressing

ON

OFF

All separating

OFF

ON

Pressing only black

OFF

OFF

All pressing

All separating

Pressing only black

MX-4101N  TRANSFER SECTION  L – 4

Image density detection and image resist detection are performed
by the sensors arranged on the front frame side and the rear frame
side. 

When the process control is performed with one sensor, the color
toner patch density is detected.
When the image resist adjustment is performed, the image resist
shift on the front frame side is detected. 
The shutter plate is provided on the sensor. The shutter plate is
closed before operation of the process control. The sensor sensitiv-
ity adjustment is performed by using the shutter plate as the refer-
ence reflection plate.
The operation of the shutter plate is controlled by the process con-
trol shutter solenoid (PCSS). 

When the process control is performed with one sensor, the black
toner patch density is detected.
When the image resist adjustment is performed, the image resist
shift on the rear frame side is detected.  

1)

Open the front cover.

2)

Open the right door.

3)

Loosen the blue screw.

4)

Turn the blue screw (A) counterclockwise. Making sure that
the lock is released (B), open and then pull out the drum posi-
tioning unit.
* Failure to complete this step may damage the intermediate

transfer belt.