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MX-M200D ADJUSTMENT 6-1

1) Loosen the developing doctor fixing screw A.
2) Insert a thickness gauge of 1.5mm to the three positions at 20mm 

and 150mm from the both ends of the developing doctor as shown. 

3) Push the developing doctor in the arrow direction, and tighten the fixing 

screws of the developing doctor in the sequence of 1

3233.

4) Check the clearance of the developing doctor. If it is within the 

specified range, then fix the doctor fixing screw with screw lock. 

*

When inserting a thickness gauge, be careful not to scratch the 
developing doctor and the MG roller. 

1) Remove the DV front cover, and put the developing tank on a flat 

surface. 

2) Tie a string to a needle or a pin. 
3) Hold the string and bring the needle close to the MG roller 

horizontally. (Do not use paper clip, which is too heavy to make a 
correct adjustment.) (Put the developing unit horizontally for this 
adjustment.)

4) Do not bring the needle into contact with the MG roller, but bring it to 

a position 2 or 3mm apart from the MG roller. Mark the point on the 
MG roller which is on the extension line from the needle tip. 

5) Measure the distance from the marking position to the top of the 

doctor plate of the developing unit to insure that it is 18mm.

 

If the distance is not within the specified range, loosen the fixing 
screw A of the main pole adjustment plate, and move the adjustment 
plate in the arrow direction to adjust.

Section

 Adjustment item

Adjustment procedure/SIM No.

A

Process 
section

(1)

Developing doctor gap adjustment

Developing doctor gap adjustment

(2)

MG roller main pole position adjustment

MG roller main pole position adjustment

(3)

Developing bias voltage check

(4)

Main charger voltage check

B

 Mechanism 
section

(1)

Image position adjustment

SIM-50

(2)

Main scanning direction (FR direction) distortion balance 
adjustment

No. 2/3 mirror base unit installing position adjustment

Copy lamp unit installing position adjustment

(3)

Main scanning direction (FR direction) distortion adjustment

Rail height adjustment

(4)

Sub scanning direction (scanning direction) distortion 
adjustment

Winding pulley position adjustment

(5)

Main scanning direction (FR direction) magnification ratio 
adjustment

SIM 48-1

(6)

Sub scanning direction (scanning direction) magnification ratio 
adjustment

OC mode in copying (SIM 48-1)

SPF mode in copying (SIM 48-5)

(7)

Off center adjustment

OC mode (SIM 50-12)

SPF mode (SIM 50-12)

(8)

SPF white correction pixel position adjustment
(required in an SPF model when replacing the lens unit)

SIM63-7

C

Image density 
adjustment

(1)

Copy mode

SIM 46-1

20mm

20mm

150mm

A

A

A

DV front cover

2

3

1

Developing doctor gap

Both ends (20mm from the both ends) :

C (Center) (150mm from the both ends) :

1.5   0.1mm

1.5   0.1mm

MX-M200D ADJUSTMENT 6-2

Note:Use a digital multi-meter with an internal resistance of 10M

Ω or 

more.

1) Set the digital multi-meter range above 500 Vdc. 
2) Put the test rod of the digital multi-meter on the developing bias 

voltage output check pin. 

3) Turn on the power, execute SIM25-1.

Note:Use a digital multi-meter with an internal resistance of 10M

Ω or 

more.

1) Set the digital multi-meter range above 600 Vdc.
2) Put the test rod of the digital multi-meter on the grid bias voltage 

output check pin. 

3) Turn on the power. 

 

(The voltage is outputted in the grid bias High output mode during 
warming up, and in the grid bias Low output mode when warming up 
is completed.)

Note: If a jam error or paper empty occurs during copying in the 

adjustment by the simulation, the image data is not saved, and 
therefore recopying is required.

Note: In advance to this adjustment, the sub scanning magnification ratio 

adjustment must be performed.

1) Set a scale on the OC table as shown below.

2) Make a copy.
3) Check the copy output. If necessary, perform the following 

adjustment procedures.

4) Execute SIM 50-1.
5) Set the OC lead edge position set value (PHOTO indicator ON) to [1]

 

The OC image scanning start position is shifted inside the document 
edge.

6) Set the 1st tray lead edge void adjustment value (TEXT indicator 

ON) * to [1]

 

The lead edge void becomes the minimum.

7) Set the 1st tray print start position value (AUTO, 1st tray indicator 

ON) to [1] and make a copy.

 

The print start position is shifted inside the document edge.

8) Measure the image loss R of the copied image. Enter the set value of 

the image scanning lead edge position (PHOTO indicator ON) again.

•1 step of the set value corresponds to about 0.1mm shift.
•Calculate the set value from the formula below.
R/0.1(mm) = Image loss set value

 

 <R: Image loss measurement value (mm)>

Example:

4/0.1 = 40 = about 40

Note: If the set value is not obtained from the above formula, perform the 

fine adjustment.

Mode

 Specification

Developing bias voltage

 DC - 400±10V

Mode

 Specification

Grid bias LOW

 DC - 380±8V

Grid bias HIGH

 DC - 525±10V

5

10

5mm

4mm

*

The dimension varies depending on the model.

10

5mm

0mm

5

*

 The scanning edge is set. 

   (A line may be printed by scanning the document edge.)
 

MX-M200D ADJUSTMENT 6-3

9) Measure the distance H between the paper lead edge and the image 

print start position. Set the image print start position set value 
(AUTO, 1st tray  indicator ON) again.

•1 step of the set value corresponds to about 0.1mm shift.
•Calculate the set value from the formula below.
H/0.1(mm) = Image print start position set value

 

 <H: Print start position measurement value (mm)>

Example:

5/0.1 = 50 = about 50

Note:If the set value is not obtained from the above formula, perform the 

fine adjustment.

10) Set the lead edge void adjustment value (TEXT indicator ON)* again.
•1 step of the set value corresponds to about 0.1mm shift.
•Calculate the set value from the formula below.
B/0.05 (mm) = Lead edge void adjustment value

 

 <B: Lead edge void (mm)>

Example:

When setting the lead edge void to 2.5mm

 

:2.5 /0.05 = about 50

Note:If the set value is not obtained from the above formula, perform the 

fine adjustment.

*

2nd tray lead edge void adjustment: Exposure display <<AUTO + 
TEXT + PHOTO>>

 

Bypass tray lead edge void adjustment: (TEXT indicator and PHOTO 
indicator ON)

OC 2nd print surface (Auto duplex) lead edge position adjustment: 
SIM50-19 <<PHOTO>>
*

For the adjustment procedure, set to S 

→ D mode before execution.

Note:Before performing the 2nd print surface lead edge position 

adjustment and the lead edge void adjustment, be sure to perform 
the 1st print surface lead edge position adjustment in advance, and 
be sure to perform the 2nd print surface lead edge position 
adjustment and then the lead edge void adjustment in this 
sequence.

 

*

(Set to S  

→  D mode for before execution)

1) Set a scale on the OC table as shown below.

Note: Since the printed copy is used as a test chart, put the scale in 

paralled with the edge lines.

2) Make a copy, Then use the copy output as an original to make an 

SPF copy again.

3) Check the copy output. If necessary, perform the following 

adjustment procedures.

4) Execute SIM 50-6.
5) Set the SPF lead edge position set value (AUTO indicator ON) so 

that the same image is obtained as that obtained in the previous OC 
image lead edge position adjustment.

5

10

0mm

0mm

*

Fit the print edge with the paper edge, and perform the 

  lead edge adjustment. 

5

10

2.5mm

2.5mm

Adjustment 

mode

 SIM

 LED

Set

 value

Spec

 value

 Set

range

OC image lead 
edge position

 SIM
50-1

 PHOTO

R/0.1

Lead edge 

void:

 

1 - 4mm

 

Image loss: 
3mm or 
less

 1 ~  99

1st tray print 
start position

AUTO

+

1st tray

B/0.1

2nd tray print 
start position

 AUTO

+

2nd tray

Bypass tray 
print start 
position

 AUTO

+

Bypass 

tray

Lead edge void

TEXT

B/0.05

OC 2nd print 
surface lead 
edge position 
adjustment

SIM

50-19*

 PHOTO

 1 step: 
0.1mm shift

Adjustment mode

 SIM

 LED

 Set value  Spec value

 Set 

range

SPF image lead 
edge position
(1st print surface)

 SIM

 

50-6

AUTO

1 step: 
0.1mm shift

Lead edge 
void:

 

1 - 4mm

Image loss: 
3mm or 
less

 1 ~ 99

(2nd print surface)

TEXT

MX-M200D ADJUSTMENT 6-4

1) Set a scale as shown in the figure below.

2) Set the document size to A4 (8.5" x 11"), and make a copy at 100%.
3) If necessary, perform the following adjustment procedure.

4) Execute SIM 50-1 and set the density mode to AUTO + TEXT + 

PHOTO (Rear edge void).The currently set adjustment value is 
displayed.

5) Enter the set value and press the [START] key. The correction value 

is stored and a copy is made.

*

1st print surface (auto duplex) rear edge void adjustment:

 

SIM50-19 <<AUTO>>

*

2nd print surface (auto duplex) rear edge void adjustment:

 

SIM50-19<<TEXT>>

*

Set to S 

→ D mode before execution.

Note:Before performing the 2nd print surface rear edge void adjustment, 

be sure to perform the 2nd print surface lead edge position 
adjustment. Never reverse the sequence.

*

 Set to S 

→ D mode before execution

1)  Set a test chart (UKOG-0089CSZZ) on the document table.
2) Select a paper feed port and make a copy. Compare the copy and 

the test chart. If necessary, perform the following adjustment 
procedure.

3) Execute SIM 50-10. After completion of warm-up, shading is 

performed and the currently set off center adjustment value of each 
paper feed port is displayed. 

4) Enter the set value and press the [START] key. The correction value 

is stored and a copy is made.

*

2nd print surface (auto duplex) off-center adjustment:

 

SIM50-10 (TEXT, 1st tray indicator)

 
<Adjustment specification>

Note: Before performing this adjustment, be sure to check that the paper 

off center adjustment (SIM 50-10) is completed.

1) Set a test chart (UKOG-0089CSZZ) on the document table.
2) Select a paper feed port and make two copies. Compare the 2nd 

copy and the test chart. If necessary, perform the following 
adjustment procedure.

*

The 1st copy does not show the void. Be sure to check the 2nd copy.

3) Execute SIM 26-43 and set the density mode to AUTO(right edge 

void) + TEXT (Left edge void).

 

The currently set adjustment value is displayed.

4) Enter the set value and press the [START] key. The correction value 

is stored.

*

The void adjustment values on the right and the left must be the 
same.

 

1) Remove the OC glass and the right cabinet.

Mode

 SIM

 LED

 Set value

 Specifi- 

cation

 Set 

range

Rear edge void

 SIM 
50-1

AUTO

 + 

TEXT

+

PHOTO

1 step: 
0.1mm shift

4mm or 
less

 1 ~ 99

 

1st print 
surface rear 
edge void

SIM 

50-19*

AUTO

2nd print 
surface rear 
edge void

 SIM 

50-19*

 TEXT

Scale image

Paper rear edge

Void amount (Standard value: 4mm or less) 

Mode

 SIM

 LED

 Set value

 Specifi- 

cation

 Set 

range

Paper off 

center

 SIM 

50-10

 AUTO

+

Selected 

tray ON

Add 1: 
0.1mm shift 
to R side. 

Reduce 1: 
0.1mm shift 
to L side.

Single:

 

Center

 

±2.0mm

 1 ~ 99

2nd print 

surface off-

center

 SIM 

50-10

 TEXT

+

1st tray

Duplex:

 

Center

 

±2.5mm

ode

 SIM

 LED

 Set value

 Specifi-

cation

 Set 

range

Left edge void

 SIM 

26-43

AUTO

(right 

edge)

+

TEXT

(left edge)

1 step: 
0.5mm shift

 0 ~ 10mm  0 ~ 10

(1)

(1)

(2)

(3)

(3)

(4)