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MX-4101N  ADJUSTMENTS  5 – 9

 

This adjustment is needed in the following situations:
* When the primary transfer high voltage power PWB or Second-

ary transfer high voltage power PWB is replaced.

* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.

1)

Go through the modes specified in Simulation 8-6.

2)

Select a mode to be adjusted with the scroll key.

3)

Enter an adjustment value (specified value) and press [OK]
key. 
By setting the default value (specified value), the specified
voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is out-
putted.

EXECUTE

EXECUTE

or after 30 sec.

10-key

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˖7&/2:63(('&/&

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˖7&0,''/(63(('&/&

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˖7&0,''/(63(('&/0

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˖7&/2:63(('&/0

(˖

˖7&/2:63(('&/<

*˖

˖7&0,''/(63(('&/<

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˖7&/2:63(('%:.

,˖

˖7&0,''/(63(('%:.

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2.

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2.

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A

TC1 LOW SPEED CL K

Primary transport 
bias reference 
value

Color

K

In low speed

51 - 255

95

2

µA - 30µA

8

µA

B

TC1 MIDDLE SPEED CL K

In middle speed

146

15

µA

C

TC1 LOW SPEED CL C

C

In low speed

95

8

µA

D

TC1 MIDDLE SPEED CL C

In middle speed

146

15

µA

E

TC1 LOW SPEED CL M

M

In low speed

95

8

µA

F

TC1 MIDDLE SPEED CL M

In middle speed

146

15

µA

G

TC1 LOW SPEED CL Y

Y

In low speed

95

8

µA

H

TC1 MIDDLE SPEED CL Y

In middle speed

146

15

µA

I

TC1 LOW SPEED BW K

Black/White

K

In low speed

95

8

µA

J

TC1 MIDDLE SPEED BW K

In middle speed

146

15

µA

K

TC2 PLAIN CL SPX

Secondary 
transport bias 
reference value

Color

Standard 

paper

Front surface

51 - 255

130

2

µA - 100µA

40

µA

L

TC2 PLAIN CL DPX

Back surface

120

35

µA

M

TC2 PLAIN BW SPX

Black/White

Front surface

109

30

µA

N

TC2 PLAIN BW DPX

Back surface

99

25

µA

O

TC2 HEAVY CL SPX

Color

Heavy 

paper

Front surface

88

20

µA

P

TC2 HEAVY CL DPX 

Back surface

78

15

µA

Q

TC2 HEAVY BW SPX

Black/White

Front surface

78

15

µA

R

TC2 HEAVY BW DPX

Back surface

68

10

µA

S

TC2 HEAVY2 CL

Color

Heavy paper 2

88

20

µA

T

TC2 HEAVY2 BW

Black/White

78

15

µA

U

TC2 GLOSSY CL

Color

Gloss paper

88

20

µA

V

TC2 GLOSSY BW

Black/White

78

15

µA

W

TC2 OHP CL

Color

OHP

72

12

µA

X

TC2 OHP BW 

Black/White

72

12

µA

Y

TC2 ENVELOPE CL

Color

Envelope

78

15

µA

Z

TC2 ENVELOPE BW

Black/White

78

15

µA

AA  TC2 CLEANING

Cleaning process

63

8

µA

MX-4101N  ADJUSTMENTS  5 – 10

 

There are some parts variations in the image density sensor sec-
tion. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment is needed in the following situations:
* When the image density sensor (image registration sensor) is

replaced.

* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
The targets of the adjustment are the color image density sensor
(image registration sensor F) and the black image density sensor
(image registration sensor R). There are following adjustment
methods.
* Color image density sensor (image registration sensor F) calibra-

tion SIM44-13

* Black image density sensor (image registration sensor R) cali-

bration SIM44-2

NOTE: The color image density sensor detects color image density

and image registration on front frame side, the black image
density sensor detects black image density and image reg-
istration on rear frame side. That is, two functions is
assigned to each one sensor.
Before executing this adjustment, check to confirm the fol-
lowing items.

* Check to confirm that the color image density sensor (image reg-

istration sensor F) and the black image density sensor (image
registration sensor R)  are clean.

* Check to confirm that the image density sensor calibration plate

is clean.

* Check to confirm that the transfer belt is clean and free from

scratches.

 

1)

Open the front cabinet of the main unit, and remove the waste
toner box.

2)

Remove the primary transfer unit fixing screw.

3)

Turn to the transfer belt tension release cam and release the
primary transfer belt tension.

CAUTION: When the transfer belt tension of the primary transfer

unit is released manually, turn on the power again after
completion of the work. This procedure initializes the
transfer roller to return it to the home position.

4)

Open the right cover unit (secondary transfer unit section).

AB

TC2 CLEAN LOW SPD

Secondary 
transport 
cleaning bias 
reference value

In low speed print

0 - 255

0

0V - –1500V

0V

AC

TC2 CLEAN MIDDLE SPD

In middle speed print

0

0V

AD

TC2 CLEAN CLEANING 

Cleaning

85

–500V

AE

VPTC LOW SPEED CL

PTC applied 
voltage control 
(AC constant 
voltage setting)

Color

Low speed

0 - 255

100

0 - (1.94) - 4.01KV

2.47KV

AF

VPTC MIDDLE SPEED CL

Middle speed

100

2.47KV

AG

VPTC LOW SPEED BK

Black/White

Low speed

100

2.47KV

AH

VPTC MIDDLE SPEED BK

Middle speed

100

2.47KV

AI

FPTC LOW SPEED CL

PTC applied 
voltage control 
(frequency 
setting value)

Color

Low speed

1 - 255

192

0.5KHz - 1.5KHz

0.5KHz

AJ

FPTC MIDDLE SPEED CL

Middle speed

192

0.5KHz

AK

FPTC LOW SPEED BK

Black/White

Low speed

192

0.5KHz

AL

FPTC MIDDLE SPEED BK

Middle speed

136

0.7KHz

AM

DCPTC LOW SPEED CL

PTC applied 
voltage control 
(DC constant 
voltage setting 
value)

Color

Low speed

0 - 255

93

0 - (0.68) - 2.14KV

–1.0KV

AN

DCPTC MIDDLE SPEED CL

Middle speed

149

–1.4KV

AO

DCPTC LOW SPEED BK

Black/White

Low speed

149

–1.4KV

AP

DCPTC MIDDLE SPEED BK

Middle speed

149

–1.4KV

AQ

PTC_HT

PTC heater 
operating 
environment 
setting

0: OFF

1-6: Environment conditions

(TC environment table 6 steps)

0 - 6

1

Always ON

AR

HT_DUTY

Setting of the 
supply power in 
PTC heater 
constant 
operation (Duty 
ratio setting)

0: OFF

 10: Lighting-up fully

(10 steps)

0 - 10

5

0% - 100%

50%

MX-4101N  ADJUSTMENTS  5 – 11

5)

Open the process front cover, and pull out the primary transfer
belt unit.

6)

Install the color image density sensor (image registration sen-
sor F) calibration jig (UKOG-0318FCZZ) to the sensor housing
section.
Engage the pawls (A) in the sensor housing groove, and slide
it to the rear frame side.

NOTE: Be careful not to damage the PTC terminal.

7)

Turn on the power and enter SIM44-13 mode.

8)

Close the right cover unit (secondary transfer unit section).

9)

Install the waste toner bottle to the main unit.

10) Close the front cabinet.
11) Press [EXECUTE] key.

Color image sensor (image registration sensor F) calibration is
automatically executed. When the operation is completed, the
adjustment result is displayed and [EXECUTE] key returns to
the normal display.

If the adjustment is not completed normally, "ERROR" is displayed.
In that case, check the following sections for any abnormality. If any
abnormality is found, repair and execute calibration again.
If an error occurs, the adjustment result is not revised.
• Color image density sensor
• PCU  PWB
• Image sensor calibration jig (standard reflection sheet dirt,

scratch, discoloration)

• Image density sensor calibration plate

NOTE: Store the image sensor calibration jig under low tempera-

ture, low humidity and dark place.

 

NOTE: This adjustment executes automatically at the outset of

registration adjustment operation and process control oper-
ation as well as SIM44-2.

1)

Enter SIM44-2 mode.

2)

Press [EXECUTE] key.
The color image density sensor (image registration sensor F),
the black image density sensor (image registration sensor R)
are automatically adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.

EXECUTE

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A

PCS_CL 
CARB OUT

Color image density sensor 
LED current adjustment 
target value

1 - 255

108

B

PCS_CL 
LED ADJ

Color image density sensor 
LED current adjustment 
target value (PCS CL CARB 
OUT) registered LED current 
level

1 - 255

21

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3&6B.'$5.

5(*B)%(/70,1

3&6B.*51'

5(*B)%(/7',)

3&6B.%(/70$;

5(*B5%(/70$;

3&6B.%(/70,1

5(*B5%(/70,1

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5(*B5%(/7',)

5(*B)/('$'-

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MX-4101N  ADJUSTMENTS  5 – 12

If the adjustment is not completed normally, "ERROR" is dis-
played.

When an error occurs, check the following sections for any
abnormality.
• Color image density sensor (image registration sensor F)
• Black image density sensor (image registration sensor R)
• PCU PWB
• Transfer belt (dirt, scratch)
• Transfer belt cleaner
• Color image sensor calibration plate

If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.

Adjustment 
value for 
process 
control 
operation 
mode

A

PCS_CL 
LED ADJ

Color image sensor 
light emitting quantity 
adjustment value

1 - 255

21

B

PCS_K 
LED ADJ

Black image sensor 
light emitting quantity 
adjustment value

1 - 255

21

C

PCS_CL 
DARK

Dark voltage of color

0 - 255

0

D

PCS_K 
DARK

Dark voltage of black

0 - 255

0

E

PCS_K 
GRND

Belt base detection 
level when 
completion of Item B 
adjustment

0 - 255

0

F

PCS_K 
BELT 
MAX

Maximum value of 
belt base detection 
level

0 - 255

0

G

PCS_K 
BELT MIN

Minimum value of 
belt base detection 
level

0 - 255

0

H

PCS_K 
BELT DIF

Belt base detection 
level difference 
(Item E - Item F)

0 - 255

0

Adjustment 
value for 
image 
registration 
operation 
mode

I

REG_F 
LED ADJ

Image registration 
sensor light emitting 
quantity adjustment 
value F

1 - 255

56

J

REG_R 
LED ADJ

Image registration 
sensor light emitting 
quantity adjustment 
value R

1 - 255

56

K

REG_F 
DARK

Image registration 
sensor dark voltage 
F

0 - 255

0

L

REG_R 
DARK

Image registration 
sensor dark voltage 
R

0 - 255

0

M

REG_F 
GRND

Belt base detection 
level when 
completion of Item I 
adjustment

0 - 255

0

N

REG_R 
GRND

Belt base detection 
level when 
completion of Item J 
adjustment

0 - 256

0

O

REG_F 
BELT 
MAX

Maximum value of 
belt base detection 
level (F side)

0 - 255

0

P

REG_F 
BELT
 MIN

Minimum value of 
belt base detection 
level (F side)

0 - 255

0

Q

REG_F 
BELT 
DIF

Belt base detection 
level difference 
(Item O - Item P)

0 - 255

0

R

REG_R 
BELT 
MAX

Maximum value of 
belt base detection 
level (R side)

0 - 255

0

S

REG_R 
BELT 
MIN

Minimum value of 
belt base detection 
level (R side)

0 - 255

0

T

REG_R 
BELT 
DIF

Belt base detection 
level difference 
(Item R - Item S)

0 - 255

0

U

REG_F 
PATCH 
(K)

Patch detection level 
F for check (K)

0 - 255

0

V

REG_F 
PATCH 
(C)

Patch detection level 
F for check (C)

0 - 255

0

W

REG_F 
PATCH 
(M)

Patch detection level 
F for check (M)

0 - 255

0

X

REG_F 
PATCH 
(Y)

Patch detection level 
F for check (Y)

0 - 255

0

Adjustment 
value for 
image 
registration 
operation 
mode

Y

REG_R 
PATCH 
(K)

Patch detection level 
R for check (K)

0 - 55

0

Z

REG_R 
PATCH 
(C)

Patch detection level 
R for check (C)

0 - 255

0

AA

REG_R 
PATCH 
(M)

Patch detection level 
R for check (M)

0 - 255

0

AB

REG_R 
PATCH 
(Y)

Patch detection level 
R for check (Y)

0 - 255

0

Adjustment 
value for 
process 
control 
operation 
mode

BK_SEN_ADJ
_ERR

Black image 
density 
sensor 
adjustment 
abnormality

PCS_K LED ADJ error 
(The target value is not 
obtained after retried 
three times.)

CL_SEN_ADJ
_ERR

Color image 
sensor 
adjustment 
abnormality

PCS_CL LED ADJ 
error (The target value 
is not obtained after 
retried three times.)

BELT_READ
_ERR

Transfer belt 
surface 
reading 
abnormality

PCS_K GRND error 
(The surface detection 
level is maximum or 
the minimum value 
difference is outside a 
reference range. )

Adjustment 
value for 
image 
registration 
operation 
mode

REG_SEN_F
_ADJ_ERR

Registration 
sensor F 
adjustment 
abnormality

REG_F LED ADJ error 
(The target value is not 
obtained after retried 
three times.)

REG_SEN_R
_ADJ_ERR

Registration 
sensor R 
adjustment 
abnormality

REG_R LED ADJ error 
(The target value is not 
obtained after retried 
three times.)

REG_BELT_F
_READ_ERR

F side 
transfer belt 
surface 
reading 
abnormality

REG_F GRND error 
(The surface detection 
level is maximum or 
the minimum value 
difference is outside a 
reference range. )

REG_BELT_R
_READ_ERR

R side 
transfer belt 
surface 
reading 
abnormality

REG_R GRND error 
(The surface detection 
level is maximum or 
the minimum value 
difference is outside a 
reference range. )