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MX-C301  ADJUSTMENTS  5 – 3

 

 

This adjustment is needed in the following situations:

* When the high voltage power PWB is replaced.

* U2 trouble has occurred.

1)

Enter the SIM 8-2 mode.

Enter the adjustment value (specified value) in the middle
speed mode, and press [OK] key. 

2)

When [EXECUTE] key is pressed, the voltage entered in the
procedure 3 is outputted for 30sec and the set value is saved.

When [EXECUTE] key is pressed, the output is stopped.

Enter the adjustment value of each mode which is specified on
the label attached on the high voltage power PWB.

NOTE: Note that the adjustment value may differ depending on the

high voltage power PWB.

Since the adjustment value label is attached on the high
voltage PWB, the PWB must be removed in order to check
the adjustment value.

This is a troublesome procedure. Therefore, it is advisable
to put down the adjustment value in advance.

GBK:XXX GBC:XXX  GBM:XXX  GBY:XXX

When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.

NOTE: Since the high voltage output cannot be checked with a

digital multi meter in this model, a judgment of the output
must be made by checking the print image quality.

 

This adjustment is needed in the following situations:

* When the high voltage power PWB is replaced.

* U2 trouble has occurred.

1)

Enter the SIM 8-1 mode..

Enter the adjustment value (specified value) in the middle
speed mode, and press [OK] key. 

EXECUTE

EXECUTE 

OR

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2.

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2.

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KEY

1

MIDDLE 
SPEED_GB_K

K charging/grid bias set value 
at middle speed

150 - 850

2

MIDDLE 
SPEED_GB_C

C charging/grid bias set value 
at middle speed

150 - 850

3

MIDDLE 
SPEED_GB_M

M charging/grid bias set value 
at middle speed

150 - 850

4

MIDDLE 
SPEED_GB_Y

Y charging/grid bias set value 
at middle speed

150 - 850

5

LOW 
SPEED_GB_K

K charging/grid bias set value 
at low speed

150 - 850

6

LOW 
SPEED_GB_C

C charging/grid bias set value 
at low speed

150 - 850

7

LOW 
SPEED_GB_M

M charging/grid bias set value 
at low speed

150 - 850

8

LOW 
SPEED_GB_Y

Y charging/grid bias set value 
at low speed

150 - 850

EXECUTE

EXECUTE 

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%˖

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&˖

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'˖

2.

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%˖

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&˖

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2.

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OR

KEY

MX-C301  ADJUSTMENTS  5 – 4

2)

When [EXECUTE] key is pressed, the voltage entered in the
procedure 3 is outputted for 30sec and the set value is saved.

When [EXECUTE] key is pressed, the output is stopped.

Enter the adjustment value of each mode which is specified on
the label attached on the high voltage power PWB.

NOTE: Note that the adjustment value may differ depending on the

high voltage power PWB.

Since the adjustment value label is attached on the high
voltage PWB, the PWB must be removed in order to check
the adjustment value.

This is a troublesome procedure. Therefore, it is advisable
to put down the adjustment value in advance.

DVK:XXX DVC:XXX  DVM:XXX  DVY:XXX

When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.

NOTE: Since the high voltage output cannot be checked with a

digital multi meter in this model, a judgment of the output
must be made by checking the print image quality.

 

This adjustment is needed in the following situations:

* When the high voltage PWB is replaced.

* U2 trouble has occurred.

1)

Enter the SIM 8-6 mode.

1

MIDDLE SPEED 
DVB_K

K developing bias set value at 
middle speed

0-600

2

MIDDLE SPEED 
DVB_C

C developing bias set value at 
middle speed

0-600

3

MIDDLE SPEED 
DVB_M

M developing bias set value at 
middle speed

0-600

4

MIDDLE SPEED 
DVB_Y

Y developing bias set value at 
middle speed

0-600

5

LOW SPEED 
DVB_K

K developing bias set value at 
low speed

0-600

6

LOW SPEED 
DVB_C

C developing bias set value at 
low speed

0-600

7

LOW SPEED 
DVB_M

M developing bias set value at 
low speed

0-600

8

LOW SPEED 
DVB_Y

Y developing bias set value at 
low speed

0-600

EXECUTE

EXECUTE 

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˖7&/2:63(('&/&

&˖

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'˖

˖7&0,''/(63(('&/0

)˖

˖7&/2:63(('&/0

(˖

˖7&/2:63(('&/<

*˖

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+˖

˖7&/2:63(('%:.

,˖

˖7&0,''/(63(('%:.

-˖

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.˖

˖7&3/$,1&/'3;

/˖

2.

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)˖

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(˖

˖7&/2:63(('&/<

*˖

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+˖

˖7&/2:63(('%:.

,˖

˖7&0,''/(63(('%:.

-˖

˖7&3/$,1&/63;

.˖

˖7&3/$,1&/'3;

/˖

2.

(;(&87(

OR

KEY

MX-C301  ADJUSTMENTS  5 – 5

2)

Select an item to be adjusted.

Enter the adjustment value (specified value), and press [OK]
key. 

When [EXECUTE] key is pressed, the voltage entered in the
procedure 3 is outputted for 30sec and the set value is saved.

When [EXECUTE] key is pressed, the output is stopped.

By setting the default value (specified value), the specified out-
put is provided.

 

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:

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

* Color image density sensor (Image registration sensor F) calibra-

tion value setting (SIM44-61)

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

bration SIM44-2

NOTE: The color image density sensor detects color image den-

sity and image registration on front frame side, the black
image density sensor detects black image density and
image registration 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.

 

NOTE: This adjustment executes automatically at the outset of

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

Normally, therefore, it is not required to perform this adjust-
ment. It is performed only when the sensor is replaced or
when the adjustment result is checked.

1)

Enter SIM44-2 mode.

A

TC1 LOW SPEED CL K

Primary transfer bias 

adjustment value

Color

K

Low speed

51 - 255

95

B

TC1 MIDDLE SPEED CL K

Middle speed

51 - 255

146

C

TC1 LOW SPEED CL CMY

CMY

Low speed

51 -255

139

D

TC1 MIDDLE SPEED CL CMY

Middle speed

51 - 255

186

E

TC1 LOW SPEED BW K

Black/White

K

Low speed

51 - 255

95

F

TC1 MIDDLE SPEED BW K

Middle speed

51 - 255

146

G

TC2 PLAIN CL SPX

Secondary transfer bias 

adjustment value

Color

Plain 

paper

Front surface

51 - 255

103

H

TC2 PLAIN CL DPX

Back surface

51 - 255

96

I

TC2 PLAIN BW SPX

Black/White

Front surface

51 - 255

90

J

TC2 PLAIN BW DPX

Back surface

51 - 255

83

K

TC2 HEAVY CL SPX

Color

Heavy 

paper

Front surface

51 - 255

83

L

TC2 HEAVY CL DPX

Back surface

51 - 255

76

M

TC2 HEAVY BW SPX

Black/White

Front surface

51 - 255

76

N

TC2 HEAVY BW DPX

Back surface

51 - 255

69

O

TC2 OHP CL

Color

OHP

51 - 255

69

P

TC2 OHP BW

Black/White

51 - 255

69

Q

TC2 ENVELOPE CL

Color

Envelope

51 - 255

69

R

TC2 ENVELOPE BW

Black/White

51 - 255

69

S

TC2 THIN CL

Color

Thin paper

51 - 255

96

T

TC2 THIN BW

Black/White

51 - 255

90

U

TC2 GLOSSY CL

Color

Gloss paper

51 - 255

83

V

TC2 GLOSSY BW

Black/White

51 - 255

76

W

TC2 CLEAN LOW SPD

Secondary transfer 

cleaning bias 

adjustment value

Low speed print mode (positive pole)

0 - 255

0

X

TC2 CLEAN MIDDLE SPD

Middle speed print mode (positive pole)

0 - 255

0

Y

TC2 CLEAN -

Cleaning bias (negative pole)

0 - 255

59

Z

TC2 CLEAN +

Cleaning bias (positive pole)

0 - 255

119

AA

TC2 COUNTER

Counter voltage output (positive pole)

0 - 255

119

MX-C301  ADJUSTMENTS  5 – 6

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 [USER SETTING] key returns to the normal dis-
play.

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)

* MFP  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.

* When the color image density sensor (image registration sensor

F) is replaced.

* When the image registration sensor unit is replace.

* U2 trouble has occurred.

A

PCS_F_CL_KA

Color image sensor light emitting quantity 
adjustment value

B

PCS_F LED ADJ

Image sensor light emitting quantity 
adjustment value F

C

PCS_R LED ADJ

Image sensor light emitting quantity 
adjustment value R

D

PCS_F_CL_DARK

Dark voltage of color image sensor

E

PCS_F DARK

Dark voltage of image sensor F

F

PCS_R DARK

Dark voltage of image sensor R

G

PCS_F GRND

Transfer belt substrate detection level when 
the item B adjustment is completed

H

PCS_F BELT MAX

Transfer belt substrate input max. value F

I

PCS_F BELT MIN

Transfer belt substrate input min. value F

J

PCS_F BELT DIF

Transfer belt substrate input difference  F 
(Item H - Item I)

K

PCS_R GRND

Transfer belt substrate detection level when 
the item C adjustment is completed

L

PCS_R BELT MAX

Transfer belt substrate input max. value R

M

PCS_R BELT MIN

Transfer belt substrate input min. value R

N

PCS_R BELT DIF

Transfer belt substrate input difference  R 
(Item L - Item M)

O

REG_F LED ADJ

Registration sensor light emitting quantity 
adjustment value F

P

REG_F DARK

Registration sensor dark voltage F

Q

REG_F GRND

Transfer belt substrate detection level when 
the item B adjustment is completed

R

REG_R LED ADJ

Registration sensor light emitting quantity 
adjustment value R

S

REG_R DARK

Registration sensor dark voltage R

T

REG_R GRND

Transfer belt substrate detection level when 
the item R adjustment is completed

U

REG_F BELT MAX

Transfer belt substrate detection level max. 
value (F side)

V

REG_F BELT MIN

Transfer belt substrate detection level min. 
value (F side)

(;(&87(

(;(&87(

W

REG_F BELT DIF

Transfer belt substrate detection level 
difference (Item U - Item V)

X

REG_R BELT MAX

Transfer belt substrate detection level max. 
value (R side)

Y

REG_R BELT MIN

Transfer belt substrate detection level min. 
value (R side)

Z

REG_R BELT DIF

Transfer belt substrate detection level 
difference (Item X - Item Y)

AA

REG_F PATCH (K)

Toner patch detection level R (K) in the 
registration adjustment

AB

REG_F PATCH (C)

Toner patch detection level R (C) in the 
registration adjustment

AC

REG_F PATCH (M)

Toner patch detection level R (M) in the 
registration adjustment

AD

REG_F PATCH (Y)

Toner patch detection level R (Y) in the 
registration adjustment

AE

REG_R PATCH (K)

Toner patch detection level R (K) in the 
registration adjustment

AF

REG_R PATCH (C)

Toner patch detection level R (C) in the 
registration adjustment

AG

REG_R PATCH (M)

Toner patch detection level R (M) in the 
registration adjustment

AH

REG_R PATCH
(Y)

Toner patch detection level R (Y) in 
theregistration adjustment

CL_SEN_ADJ_ERR 

Color image sensor adjustment abnormality

BK_SEN_ADJ_ERR 

Black image density sensor adjustment 
abnormality

P_F_CL_ka 

F side image sensor adjustment abnormality

P_F_GRND 

Belt base detection level when completion of 
Item F adjustment abnormality

P_R_GRND 

Belt base detection level when completion of 
Item R adjustment abnormality

REG_F_LED_ADJ 

Registration sensor F adjustment abnormality

REG_R_LED_ADJ

Registration sensor R adjustment abnormality

REG_F_GRND 

Belt base detection level (F side) abnormality

REG_R_GRND

Belt base detection level (R side) abnormality