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MX-2300/2700 N/G  ADJUSTMENTS  6 – 4

1) With the front cabinet open, enter SIM25-2.

2) Close the front cabinet.
3) Select a developing unit to be adjusted.
4) When [EXECUTE] key it pressed, it is highlighted. The devel-

oping roller rotates, and the toner sensor detects toner density,
and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key display return, to normal from
highlight. This makes you know whether the adjustment opera-
tion is completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
NOTE: If the operation is interrupted within 3 minutes, the 

adjustment result is not reflected (enabled).

When [EXECUTE] key is pressed during rotation, the opera-
tion is stopped and [EXECUTE] key returns to the normal dis-
play.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of the ref-
erence toner density control value is not completed normally.

5)

Use SIM24-5 to clear the developer counter.

6)

Use SIM44-27 to clear the half-tone correction data.
NOTE:
a)

When replacing developer, always replace all the three
colors of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be
adversely affected. Black developer can be replaced indi-
vidually.

b)

After replacement of developer or the photoconductor, be
sure to execute SIM44-27 to clear the half-tone correction
data.
If the above procedure is neglected, the half-tone correc-
tion may not be performed correctly.

 

 

This adjustment must be executed in the following cases:
* When the MC/DV high voltage power PWB is replaced. 
* When U2 trouble occurs. 
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM8-2 mode.

2)

Select an output mode to be adjusted with the mode key and
the scroll key. 

3)

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

EXECUTE

M

K

0

SIMULATION NO.25-02

TEST

AUTOMATIC DEVELOPER ADJUSTMENT

EXECUTE

TCD_K

xx

:

TCV_K

xx

:

TCD_C

xx

:

TCV_C

xx

:

TCD_M

xx

:

TCV_M

xx

:

TCD_Y

xx

:

TCV_Y

xx

:

1/1

K

C

M

Y

CLOSE

EXECUTE

0

SIMULATION NO.25-02

TEST

AUTOMATIC DEVELOPER ADJUSTMENT

EXECUTE

AT DEVE ADJ_L_K

xxx

:

AT DEVE VO_L_K

xxx

:

AT DEVE ADJ_L_C

xxx

:

AT DEVE VO_L_C

xxx

:

AT DEVE ADJ_L_M

xxx

:

AT DEVE VO_L_M

xxx

:

AT DEVE ADJ_L_Y

xxx

:

xxx

:

1/2

CLOSE

AT DEVE VO_L_Y

K

C

M

Y

0

SIMULATION NO.25-02

TEST

AUTOMATIC DEVELOPER ADJUSTMENT

EXECUTE

AT DEVE ADJ_L_K

xxx

:

AT DEVE VO_L_K

xxx

:

AT DEVE ADJ_L_C

xxx

:

AT DEVE VO_L_C

xxx

:

AT DEVE ADJ_L_M

xxx

:

AT DEVE VO_L_M

xxx

:

AT DEVE ADJ_L_Y

xxx

:

xxx

:

1/2

CLOSE

AT DEVE VO_L_Y

Y

K

C

M

0

SIMULATION NO.25-02

TEST

AUTOMATIC DEVELOPER ADJUSTMENT

TCD_K

EE-EL

:

TCV_K

:

TCD_C

xx

:

TCV_C

:

TCD_M

EE-EL

:

TCV_M

:

TCD_Y

xx

:

TCV_Y

:

1/1

K

C

M

Y

CLOSE

EXECUTE

or process interrupt

Adjustment completed

Abnormal

end

EE-EL

EL abnormality

Sensor output level, 1.5V or below; control 
voltage, 8.0V or above

EE-EU

EU abnormality

Sensor output level, 3.45V or above; 
control voltage, 2.0V or below

EE-EC

EC abnormality

Sensor output level, other than 2.5V 

± 0.2V

EXECUTE

EXECUTE

0

A:

A : xxx

B: xxx

C: xxx

;

MIDDLE SPEED GB_K

;

MIDDLE SPEED GB_C

;

MIDDLE SPEED GB_M

SIMULATION

MHV/GRID SETTING AND OUTPUT

xxx

230

850

OK

TEST

CLOSE

EXECUTE

D: xxx

;

MIDDLE SPEED GB_Y

LOW

MIDDLE

0

A:

A: xxx

B: xxx

C: xxx

;

MIDDLE SPEED GB_K

;

MIDDLE SPEED GB_C

;

MIDDLE SPEED GB_M

SIMULATION NO.08-02

MHV/GRID SETTING AND OUTPUT

xxx

230

850

OK

TEST

CLOSE

EXECUTE

D: xxx

;

MIDDLE SPEED GB_Y

LOW

MIDDLE

10-key

or after 30 sec.

NO.

08-02

MX-2300/2700 N/G  ADJUSTMENTS  6 – 5

The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.

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.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1) Remove the main unit rear cover.

2)

Open the PWB holder.

3)

Enter SIM8-2 mode.

4)

Select an output mode to be adjusted with the mode key and
the scroll key.

5)

Check the relationship between the pin No. of the connector
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.

6)

Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.

7)

Press [EXECUTE] key.
The main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.

8)

Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust again. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
MC/DV high voltage PWB
PCU PWB
Developing unit
OPC drum unit
High voltage circuit electrode

 

This adjustment must be executed in the following cases:
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.

MIDDLE

A

MIDDLE SPEED GB_K

K

Main charger grid voltage 
(Middle speed mode)

230 – 850

615

53.6 

± 1.61V

CNMON

8

–615V

B

MIDDLE SPEED GB_C

C

Main charger grid voltage 
(Middle speed mode)

230 – 850

615

53.6 

± 1.61V

CNMON

6

–615V

C

MIDDLE SPEED GB_M

M

Main charger grid voltage 
(Middle speed mode)

230 – 850

615

53.6 

± 1.61V

CNMON

4

–615V

D

MIDDLE SPEED GB_Y

Y

Main charger grid voltage 
(Middle speed mode)

230 – 850

615

53.6 

± 1.61V

CNMON

2

–615V

LOW

A

LOW SPEED GB_K

K

Main charger grid voltage 
(Low speed mode)

230 – 850

605

52.7 

± 1.58V

CNMON

8

–605V

B

LOW SPEED GB_C

C

Main charger grid voltage 
(Low speed mode)

230 – 850

605

52.7 

± 1.58V

CNMON

6

–605V

C

LOW SPEED GB_M

M

Main charger grid voltage 
(Low speed mode)

230 – 850

605

52.7 

± 1.58V

CNMON

4

–605V

D

LOW SPEED GB_Y

Y

Main charger grid voltage 
(Low speed mode)

230 – 850

605

52.7 

± 1.58V

CNMON

2

–605V

MX-2300/2700 N/G  ADJUSTMENTS  6 – 6

1) Enter SIM8-1 mode.

2)

Select an output mode to be adjusted with the mode key and
the scroll key.

3)

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

The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.

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.
To adjust all the modes individually, first adjust the middle speed
mode, then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.

Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1)

Remove the main unit rear cover.

EXECUTE

EXECUTE

0

A:

Aȇxxx

Bȇxxx

Cȇxxx

Ȉġ

MIDDLE SPEED DVB_K

Ȉġ

MIDDLE SPEED DVB_C

Ȉġ

MIDDLE SPEED DVB_M

SIMULATIONġ NO.08-01

DV SETTING AND OUTPUT

xxx

ġ

0

700

OK

TEST

CLOSE

EXECUTE

Dȇxxx

Ȉġ

MIDDLE SPEED DVB_Y

LOW

MIDDLE

0

A:

Aȇxxx

Bȇxxx

Cȇxxx

Ȉ

MIDDLE SPEED DVB_K

Ȉ

MIDDLE SPEED DVB_C

Ȉ

MIDDLE SPEED DVB_M

SIMULATIONġ NO.08-01

DV SETTING AND OUTPUT

xxx

0

700

OK

TEST

CLOSE

EXECUTE

Dȇxxx

Ȉ

MIDDLE SPEED DVB_Y

LOW

MIDDLE

10-key

or after 30 sec.

MIDDLE

A

MIDDLE SPEED DVB_K

K

Developing bias voltage 
(Middle speed mode)

0 – 700

450

12.1 

± 0.36V

CNMON

7

–450V

B

MIDDLE SPEED DVB_C

C

Developing bias voltage 
(Middle speed mode)

0 – 700

450

12.1 

± 0.36V

CNMON

5

–450V

C

MIDDLE SPEED DVB_M

M

Developing bias voltage 
(Middle speed mode)

0 – 700

450

12.1 

± 0.36V

CNMON

3

–450V

D

MIDDLE SPEED DVB_Y

Y

Developing bias voltage 
(Middle speed mode)

0 – 700

450

12.1 

± 0.36V

CNMON

1

–450V

LOW

A

LOW SPEED DVB_K

K

Developing bias voltage 
(Low speed mode)

0 – 700

430

11.4 

± 0.34V

CNMON

7

–430V

B

LOW SPEED DVB_C

C

Developing bias voltage 
(Low speed mode)

0 – 700

430

11.4 

± 0.34V

CNMON

5

–430V

C

LOW SPEED DVB_M

M

Developing bias voltage 
(Low speed mode)

0 – 700

430

11.4 

± 0.34V

CNMON

3

–430V

D

LOW SPEED DVB_Y

Y

Developing bias voltage 
(Low speed mode)

0 – 700

430

11.4 

± 0.34V

CNMON

1

–430V

MX-2300/2700 N/G  ADJUSTMENTS  6 – 7

2) Open the PWB frame.
3) Enter SIM8-1 mode.
4) Select an output mode to be adjusted with the mode key and

the scroll key.

5) Check the relationship between the pin No. of the connector

CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.

6) Apply a digital multi-meter to the connector CNMON pin on the

MC/DV high voltage PWB corresponding to the adjusted
mode.

7) Press [EXECUTE] key.

The developing bias voltage is outputted for 30sec.

8) Check the monitor voltage with the digital multi-meter.

If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust again. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
MC/DV high voltage PWB
PCU PWB
Developing unit
OPC drum unit
High voltage circuit electrode

 

This adjustment must be executed in the following cases:
* When the TC high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM8-6 mode.

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.

CNMON

1

EXECUTE

EXECUTE

A:ġ

Aȇxxx

Bȇxxx

Cȇxxx

Ȉġ

TC1 LOW SPEEDġġCL K

Ȉġ

TC1 MIDDLE SPEED CL K

Ȉġ

TC1 LOW SPEED CL CMY

SIMULATIONġ NO.08-06

THV SETTING AND OUTPUT

xxx

0 255

OK

TEST

EXECUTE

0

Dȇxxx

Ȉ

TC1 MIDDLE SPEED_CL CMY

CLOSE

A:ġ

Aȇxxx

Bȇxxx

Cȇxxx

Ȉ

TC1 LOW SPEED CL K

Ȉ

TC1 MIDDLE SPEED CL K

Ȉ

TC1 LOW SPEED CLġ CMY

SIMULATIONġ NO.08-06

THV SETTING AND OUTPUT

xxx

ġ

0 255

OK

TEST

EXECUTE

0

Dȇxxx

Ȉ

TC1 MIDDLE SPEED_CL CMY

CLOSE

10-key

or after 30 sec.

A

TC1 LOW SPEED CL K

Primary transfer 
bias reference 
value

COLOR

K

Low speed

0 to 255

232

–500V to 5000V

4500V

B

TC1 MIDDLE SPEED CL K

Middle speed

0 to 255

232

–500V to 5000V

4500V

C

TC1 LOW SPEED CL CMY

CMY

Low speed

0 to 255

139

–500V to 5000V

2500V

D

TC1 MIDDLE SPEED CL CMY

Middle speed

0 to 255

139

–500V to 5000V

2500V

E

TC1 LOW SPEED BW K

BLACK

K

Low speed

0 to 255

232

–500V to 5000V

4500V

F

TC1 MIDDLE SPEED BW K

Middle speed

0 to 255

232

–500V to 5000V

4500V

G

TC2 PLAIN CL SPX

Secondary transfer 
bias reference 
value

COLOR

Normal 

paper

Front surface

51 to 255

100

2

µA to 45µA

12.5

µA

H

TC2 PLAIN CL DPX

Back surface

51 to 255

100

2

µA to 45µA

12.5

µA

I

TC2 PLAIN BW SPX

BLACK

Front surface

51 to 255

90

2

µA to 45µA

10

µA

J

TC2 PLAIN BW DPX

Back surface

51 to 255

90

2

µA to 45µA

10

µA

K

TC2 HEAVY1 CL SPX

COLOR

Heavy paper

51 to 255

69

2

µA to 45µA

6

µA

L

TC2 HEAVY1 BW SPX

BLACK

51 to 255

69

2

µA to 45µA

6

µA

M

TC2 OHP CL

COLOR

OHP

51 to 255

60

2

µA to 45µA

4

µA

N

TC2 OHP BW

BLACK

51 to 255

60

2

µA to 45µA

4

µA

O

TC2 ENVELOPE CL

COLOR

Envelope

51 to 255

184

2

µA to 45µA

30

µA

P

TC2 ENVELOPE BW

BLACK

51 to 255

184

2

µA to 45µA

30

µA

Q

TC2 CLEANING

Cleaning process

51 to 255

79

2

µA to 45µA

8

µA

R

TC2 CLEAN LOW SPD

Secondary transfer 
cleaning bias 
reference value

Low speed print

51 to 255

72

–50V to –1500

–200V

S

TC2 CLEAN MIDDLE SPD

Middle speed print

51 to 255

72

–50V to –1500V

–200V

T

TC2 CLEAN CLEANING

Cleaning

51 to 255

156

–50V to –1500V

–800V

: Dec. 15 2005