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MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 16

9) Press the [EXECUTE] key, and the machine starts loading

RSPF adjustment patterns (for the back side).
* The screen shows a message indicating that the machine is

reading RSPF adjustment patterns (for the back side).
The machine starts calculating the adjustment amount (for
the back side) after it has read the patterns for the back side.
After the machine has finished calculating the adjustment
amount for the back side, the next screen appears where
you can view the results of the adjustments.

• RSPF original leading edge adjustment (back side)
• RSPF original off-center adjustment (back side)
• RSPF original sub-scan magnification adjustment 

(back side)

10) The adjustment result screen appears.

This screen shows the current values along with the previous
values in parentheses.
* By pressing the [REPRINT] key, you can return to the cas-

sette selection screen and have the machine self-print
RSPF adjustment patterns (for the front and back sides)
again.

* To have the machine start re-reading the RSPF adjustment

patterns (front and back sides), press the [RESCAN] key.

* To return to the top menu without saving the adjustment val-

ues into EEPROM and RAM, press the [RETRY] key.

* To display the data used for adjustment, press the [DATA]

key.

11) To save the adjustment values into EEPROM and RAM and

return to the top menu, press the [OK] key.
* To return to the result screen, press the [BACK] key.

 

This adjustment must be performed in the following cases:
* When the color shift occurs.
* When the LSU is replaced.
* When the LSU is removed from the main unit.
* When the unit is installed or when the installing place is changed.
* When maintenance work is performed. (Replacement of the

OPC drum, the OPC cartridge, the transfer unit, the transfer belt,
etc.)

* When [ADJ 4A] / [ADJ 16A] Print engine image magnification

ratio adjustment (BK) (main scanning direction) is performed.

* U2 trouble has occurred.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
* When the color phase is not proper even after execution of the

color balance adjustment.

* When the OPC drum drive section is disassembled.
* When the primary transfer unit is replaced. (when it is removed

from the machine)

* When the developing unit or the OPC drum unit is removed from

the machine.

 

This adjustment performs the print engine image distortion adjust-
ment, the OPC drum phase adjustment, and the color registration
adjustment simultaneously.
1)

Enter SIM50-22 mode.

2)

Press [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto-
matic adjustment is started. (It takes about 15 sec to complete
the adjustment.)

3)

When the adjustment is completed, [EXECUTE] key returns to
the normal display, and the value of the adjustment result is
displayed.
The current skew level for each color is displayed on the
SKEW display section.

EXECUTE

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Adjustment completed

Abnormal end

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 17

4) Write down the displayed skew level.

Meaning of the skew level value and the adjustment pro-
cedure
* If "OK" is displayed for all items of SKEW ALL_ROTATE, C, 

M, and Y, there is no need to perform the adjustment.

* When "R" is displayed at the head of the value, turn the LSU 

skew adjustment screw clockwise.

* When "L" is displayed at the head of the value, turn the LSU 

skew adjustment screw counterclockwise.

* The turning amount of the adjustment screw corresponds to 

each adjustment value. "ALL_ROTATE" indicates the
number of rotations, and C, M, and Y indicate numbers of
clicks.
The display value is rounded at the decimal point.

* "ALL_ROTATES" shows the number of rotations of

adjustments for all the adjustment screws. "C, M, and Y
(SKEW)" shows the number of adjustment click steps for
each adjustment screw of C, M, and Y.

Contents in (    )
MIAN, SUB: Difference from the previous adjustment value of
image registration.

Example: 

If 105 for this time and 103 for the previous time, 
it is displayed as 105.0 (+2.0).

SKEW, ALL_ROTATE: Judgment of the LSU skew adjustment
result. OK or NG.
PHASE: OPC drum phase adjustment value of the previous
time

5)

If the display of ALL_ROTATE is NG, turn all the LSU skew
adjustment screws to adjust, and perform the procedures 2) to
4).
Repeat the procedures 2) to 5) until the display of
ALL_ROTATE becomes OK. If the display of ALL_ROTATE is
OK, go to the procedure 6).
For the adjustment, remove the front cover and the waste
toner box, and turn the skew adjustment screw.

MAIN F

C

Registration adjustment value main scanning 
direction (Cyan laser writing position F side)

1.0 - 199.0

100

M

Registration adjustment value main scanning 
direction (Magenta laser writing position F side)

1.0 - 199.0

100

Y

Registration adjustment value main scanning 
direction (Yellow laser writing position F side)

1.0 - 199.0

100

MAIN R

C

Registration adjustment value main scanning 
direction (Cyan laser writing position R side)

1.0 - 199.0

100

M

Registration adjustment value main scanning 
direction (Magenta laser writing position R side)

1.0 - 199.0

100

Y

Registration adjustment value main scanning 
direction (Yellow laser writing position R side)

1.0 - 199.0

100

SUB

C

Registration adjustment value sub scanning direction 
(Cyan drum 

 Black drum)

1.0 - 199.0

100

M

Registration adjustment value sub scanning direction 
(Magenta drum 

 Black drum)

1.0 - 199.0

100

Y

Registration adjustment value sub scanning direction 
(Yellow drum 

 Black drum)

1.0 - 199.0

100

SKEW

C

Print skew amount calculation result (Cyan)

-99.9 - 99.9

0

If the value is positive (+), "L" is displayed at the head of the 
value. If negative (–), "R" is displayed.
If the value is in the range of –2.1 - +2.1, "(OK)" is displayed at 
the bottom of the value. In the other cases, "(NG)" is displayed.

M

Print skew amount calculation result (Magenta)

-99.9 - 99.9

0

Y

Print skew amount calculation result (Yellow)

-99.9 - 99.9

0

ALL_

ROTATE

Print skew amount calculation result (Overall)

-99.9 - 99.9

0

If the value is positive (+), "L" is displayed at the head of the 
value. If negative (–), "R" is displayed.
If the value is in the range of –1.6 - +1.6, "(OK)" is displayed at 
the bottom of the value. In the other cases, "(NG)" is displayed.

PHASE

OPC drum phase adjustment value

1 - 8

1

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 18

6) Repeat the procedures 2) to 4) again, and check to confirm

that C, M, and Y (SKEW) are OK.
If any of them is NG, turn the LSU skew adjustment screw of
the corresponding color to adjust.

When the adjustment is made by turning the LSU skew adjustment
screw of K, the states of C, M and Y (SKEW) are changed. Execute
SIM50-22 to check to confirm that C, M, and Y (SKEW) are OK.
When an abnormality occurs, "ERROR" is displayed.
In this case, check each drive section and the process section.

The adjustment result can be checked by the following manual
adjustment mode.
* ADJ  5B

Image skew adjustment (Manual adjustment) (SIM50-20)

* ADJ  5C

Color registration offset adjustment (SIM50-20)

When the color registration is greatly shifted due to replacement of
the LSU, etc, if SIM50-22 is used to perform the color registration
automatic adjustment, an error may occur.
In this case, the adjustment may be properly executed by setting
the adjustment items A - I of SIM50-20 to "100" and executing the
automatic adjustment again.
If color shift in an actual print image differs in the center, the front
side, and the rear side, the color shift offset adjustment can
improve it. (Refer to ADJ 5C.)
Normally there is a difference in color shift in several dots. Perform
the adjustment only when the adjustment is required.

 

If a more accurate adjustment than the automatic adjustment ADJ
5A is required, use this method of adjustment.
This adjustment is made by changing the parallelism of the LSU
unit scan laser beams for the OPC drum.
1) Enter the SIM 50-20 or 64-01 mode.
2) Select the paper feed tray with A3 (11" x 17") paper in it, and

press [EXECUTE] key.

3) The image skew (image registration) adjustment pattern is

printed.

4)

Check the printed black image for any skew.
Use the four cross points printed in black to measure the
squareness.
There are following two methods of checking the black image
for any skew (right angle).
Method 1
Measure the distances between opposing corners of the rect-
angle print pattern, and compare the two distances to check
the squareness.
Method 2
Check the squareness of the vertical and horizontal sides of
the rectangle print pattern by using A3 or 11" x 17" paper
sides.

In the case of Method 2, the right angle of paper to be used
may not be exact. Be sure to check the right angle of paper to
be used in advance.

Method 1
Measure the length of the diagonal lines of the rectangle print
pattern.
Calculate the difference between the measured lengths C and
D of the diagonal lines.
Check to insure that the difference between C and D is in the
following range.
C - D = 0.8mm
If the difference between C and D is in the above range, there
is no need to adjust.
Method 2
Fit the side of A3 or 11" x 17" paper to the long side of the rect-
angle print pattern.
Measure the slant (skew) of the vertical side for the horizontal
side of paper as shown in the figure.
If the above distance is 0.5mm or less, there is no need to
adjust.
If the above condition is not satisfied, perform the following
procedure.

A

B

About

220mm

About 300mm

Diagonal
line D

Diagonal
line C

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 19

5) Open the front cover, remove the waste toner box, and turn the

four LSU image skew adjustment screws in the same direction
by the same amount. 
For the adjustment, remove the front cover and the waste
toner box, and turn the skew adjustment screw.

(Skew adjustment screw rotation direction)
When C is greater than D in the method 1 or there is some
skew in the direction A in the method 2, turn the screw clock-
wise.
When C is smaller than D in the method 1 or there is some
skew in the direction B in the method 2, turn the screw coun-
terclockwise.
(Reference of the rotation amount of the skew adjustment
screw)
In case of the method 1, 0.8mm/about 1.5 rotations
In case of the method 2, 0.5mm/about 1.5 rotations
Repeat the procedures 2) to 6).
After completion of the black image skew adjustment, go to the
procedure 7).

6) Perform the same procedures as 1) and 2).
7) Check the printed color image for any skew.

If the difference between the shift amounts on the F and R
sides is within 

 1 scale of the fine adjustment check scale,

there is no need to perform the adjustment.
Measure the skew amount from the print patterns on the front
and rear sides of each color.

In each Y/M/C color print pattern printed separately in the F
side and in the R side, note the same print color pattern and
check to confirm that the F side and the R side are in the same
condition.
Rough adjustment pattern check:
Check the sub scan rough adjustment color image shift check
section on the R side and the F side of each color, use the cen-
ter position of the black scale as the reference, and check the
balance in shifts of the color image line positions in the positive
and the negative directions. The balance in the R side must be
the same as that in the F side.
Fine adjustment pattern check:
Check the square frames on the R side and the F side of each
color. (Normally five sections of high density can be seen.)
Check the sub scanning direction position of the center area of
high density (one of the above five sections). These must be
on the same position on the R side and the F side.
In this case, use the sub scan direction color image shift check
scale (fine adjustment) as the reference.
Visually check the color density and make the darkest section
as the center, and use it as the read value of the shift amount.
Check that the difference in the center position of the dark den-
sity section is within 

1 step.

The positional relations of the front and the rear frame of the
print color patterns of a same color are compared. There is no
need that all the colors are in the same state. Compare only
the positional relations of color patterns of a same color.
If the above condition is not satisfied, perform the following
procedure.

8)

Turn the LSU skew adjustment screw of the adjustment target
color to adjust.
(Skew adjustment screw rotation direction)
When the F side is skewed to the right side for R side: Turn the
screw clockwise.
When the F side is skewed to the left side for the R side: Turn
the screw counterclockwise.
(Reference of the rotation amount of the skew adjustment
screw)
Skew of difference by one step between F and R sides (Differ-
ence by one scale of the fine adjustment check scale) / Turn
for about 2 clicks.
Repeat the procedures 7) to 8) until a satisfactory result is
obtained.

R side

F side

A-sub

B-sub

A-main

B-main

Color image shift
check section
(Rough adjustment)

C (Image shift fine adjustment
reference frame)

Color image shift check
scale (Fine adjustment)

A-main: Main scan rough adjustment pattern
A-sub: Sub scan rough adjustment pattern
B-main: Main scan fine adjustment scale
B-sub: Sub scan fine adjustment scale
C: Main scan sub scan fine adjustment pattern