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MX-1800N  ADJUSTMENTS  6 – 13

2) Enter "1" with 10-key in the PRINT MODE of set item A, and

touch [OK] key.

3) Select the paper feed stage with A3 (or 11 x 17) in it with

PAPER SELECT of set item C, and touch [OK] key.

4) Touch [EXECUTE] key.

The adjustment patterns (8 pages) are printed.

Each identification number ("1" – "8") is printed on each printed
page of 8 adjustment patterns.

5) Check the deflection in 94mm pitch cycle of each C/M/Y print

pattern. Select a print pattern of the smallest deflection for
each color of C/M/Y, and use the pattern identification number
as the adjustment value, and enter it to set item B. Touch [OK]
key.

NOTE: If there is a peculiar deflection other than the drum cycle

(94mm pitch), check the following conditions.
* OPC drum drive section
* Transfer belt drive section
* Paper feed drive section
* Each motor speed set value (Set value of SIM48-6)

 

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM50-10 mode.

2)

Set A4 (11 x 8.5) paper in the paper feed tray.

3)

Select the paper feed tray set in procedure 2) with the scroll
key.

4)

Touch [EXECUTE] key.
The check pattern is printed.

5)

Check that the inside dimension of the printed half tone is 240
± 0.5mm.

If the above condition is not satisfied, execute the procedures
below.

8

94mm

94mm

94mm

94mm

EXECUTE

EXECUTE

0

A:

Aȇxxx

Bȇ xx

Ȉ

BK-MAG

Ȉ

MTF

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

xxx

64 140

OK

TEST

EXECUTE

CLOSE

Cȇ xx

Ȉ

CS1

Dȇ xx

Ȉ

CS2

0

A:

Aȇxxx

Bȇxx

Ȉ

BK-MAG

Ȉ

MTF

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

xxx

64 140ġ

OK

TEST

EXECUTE

CLOSE

Cȇxx

Ȉ

CS1

Dȇxx

Ȉ

CS2

end of print

MX-1800N  ADJUSTMENTS  6 – 14

6) Change the set value of set item A.

When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.

Repeat procedures 2) – 6) until a satisfactory result is obtained.

 

This adjustment must be executed in the following cases:
* When the LSU is replaced or removed.
* When [ADJ8] print engine image magnification ratio (BK) (main

scanning direction) is performed.

* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual feed tray is replaced.
* When the manual feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replaced.
* When the large capacity paper feed tray section is disassembled.
* When the regist roller section is disassembled.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
(Caution)
* Before execution of this adjustment, check the following item.
* Check to insure that the print engine image magnification ratio

adjustment (BK) (main scanning direction) has been properly
adjusted.

1) Enter SIM50-10 mode.

2) Select set item J with the scroll key and enter the value corre-

sponding to the paper feed tray to be adjusted.

3)

Set A4 (11 x 8.5) paper in the paper feed tray selected in pro-
cedure 2).

4)

Touch [EXECUTE] key.
The adjustment pattern is printed.

5)

Check the adjustment pattern image position.
Measure the dimension of the void area in the front and the
rear frame direction of the adjustment pattern, and check that
all the following conditions are satisfied.

RV: REAR VOID AREA
FV: FRONT VOID AREA
RV + FV 

≤ 4.0mm

RV = 2.0 

± 2.0mm

FV = 2.0 

± 2.0mm

If the above conditions are not satisfied, execute the proce-
dures below.

A

BK-MAG

Main scan print 
magnification ratio BK

60 – 140

100

B

MFT

Print off-center adjustment 
value (Manual feed tray)

1 – 99

50

EXECUTE

EXECUTE

0

A:

A : xxx

B : xx

; BK- MAG
; MTF

SIMULATION NO.50-10

PAPER CENTER OFFSET SET UP

xxx

[ 60~140 ]

OK

TEST

EXECUTE

CLOSE

C : xx

; CS1

D : xx

; CS2

0

A:

A : xxx

B : xx

; BK- MAG
; MTF

SIMULATION NO.50-10

PAPER CENTER OFFSET SET UP

xxx

[ 60~140 ]

OK

TEST

EXECUTE

CLOSE

C : xx

; CS1

D : xx

; CS2

End of print

C

CS1

Print off-center adjustment 
value (Paper feed tray 1)

1 – 99

50

D

CS2

Print off-center adjustment 
value (Paper feed tray 2)

1 – 99

50

E

CS3

Print off-center adjustment 
value (Paper feed tray 3)

1 – 99

50

F

CS4

Print off-center adjustment 
value (Paper feed tray 4)

1 – 99

50

G LCC

Print off-center adjustment 
value (LCC)

1 – 99

50

H

ADU

Print off-center adjustment 
value (ADU)
Note: Before execution of 
this adjustment, check to 
insure that the adjustment 
items A – G have been 
properly adjusted. If not, 
this adjustment cannot be 
made properly.

1 – 99

50

I

MULTI COUNT

Print quantity

1 – 999

1

J

PAPER

MFT

Paper feed 
tray select

Manual paper 
feed tray

1

2  (CS  1)

CS 1

Paper feed 
tray 1

2

CS 2

Paper feed 
tray 2

3

CS 3

Paper feed 
tray 3

4

CS 4

Paper feed 
tray 4

5

LCC

LCC

6

K

DUPLEX

YES

Duplex 
print select

Selected

0

1 (NO)

NO

Not selected

1

MX-1800N  ADJUSTMENTS  6 – 15

6) Select the paper feed mode adjustment item (B – H) to be

adjusted with the scroll key.

7) Change the adjustment value.

Enter the adjustment value and touch [OK] or [EXECUTE] key.
When [EXECUTE] key is touched, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) – 7) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.

8) Loosen the paper feed tray off-center adjustment screws (2

pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/back frame direc-
tion. Repeat the adjustment procedures from 4).

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When the color image registration mistake in the main scanning

direction occurs.

* When the color image registration mistake in the sub scanning

direction occurs.

* When the unit is installed or when the installing place is changed.
* When maintenance is executed. (Replacement of the OPC drum,

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

* When [ADJ8] print engine image magnification ratio (BK) (main

scanning direction) is performed.

* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.

(Before execution of this adjustment, all the following adjustments
must have been completed.)
* Image skew adjustment (LSU (writing) unit)

* Print engine image magnification ratio adjustment (BK) (Main

scanning direction) (Print engine section)

 

In this adjustment, the image registration adjustment in the main
scanning direction and that in the sub scanning direction are exe-
cuted simultaneously and automatically.
1)

Enter SIM50-22 mode.

2)

Touch [REGIST] key to select the image registration adjust-
ment auto adjustment mode.

3)

Touch [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto
adjustment is started. After completion of the adjustment,
[EXECUTE] key returns to the normal display and the adjust-
ment result is displayed.
It takes about 40 sec to complete the adjustment.

REGIST

MAIN 
F

C

Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (F side)

1.0 – 199.0

100

M

Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (F side)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (F side)

1.0 – 199.0

100

EXECUTE

0

SIMULATIONġ NO.50-22

TEST

CLOSE

EXECUTE

ġ

NOW EXECUTING…

0

SIMULATIONġ NO.50-22

TEST

CLOSE

EXECUTE

PRESS [EXECUTE] TO START

ERRORȇTONNER EMPTY

0

SIMULATIONġ NO.50-22

TEST

ġġ

EXECUTE

1/1

CLOSE

REGIST

DRUM POS

ALL

C

xxx (x)

xxx

xxx (x)

xxx (x)

M

xxx (x)

xxx

xxx (x)

Y

xxx(x) ġġġġ

xxx(x)

xxx (x)

(x)

(x)

MAIN R

,MAIN F

SUB

PHASE

Normal end

AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION

AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION

AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION

Abnormal end

MX-1800N  ADJUSTMENTS  6 – 16

MAIN, SUB: The entered value after adjustment is displayed.
( ): Difference from the previous value.
Example: This time 105, previous time 103: 105 (+2)
* In case of an error, "ERROR" is displayed with the details.

To check the auto adjustment result, use the manual image
registration adjustment mode below.
* Image registration adjustment (Main scanning direction) (Manual

adjustment) (SIM50-20)

* Image registration adjustment (Sub scanning direction) (Manual

adjustment) (SIM50-21)

 

1)

Enter SIM50-20 mode.

2)

Select the paper feed tray with A3 (11 x 17) paper in it by
changing the value of set item H.

3)

Touch [EXECUTE] key.
The image registration adjustment pattern in the main scan-
ning direction is printed.

A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range (0 

± 1)

REGIST

MAIN 
R

C

Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (R side)

1.0 – 199.0

100

M

Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (R side)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (R side)

1.0 – 199.0

100

SUB

C

Image registration 
adjustment value (Sub 
scanning direction) 
(Cyan)

1.0 – 199.0

100

M

Image registration 
adjustment value (Sub 
scanning direction) 
(Magenta)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Sub 
scanning direction) 
(Yellow)

1.0 – 199.0

100

EXECUTE

0

A:ġ

Aȇxxx

Bȇxxx

Ȉ

CYAN(FRONT)

Ȉ

CYAN(REAR)

SIMULATIONġ NO.50-20

REGISTRATIONġ ADJUSTMENT : FRONT-REAR DIRECTION

xxx

ġ

1 199

OK

TEST

EXECUTE

CLOSE

Cȇxxx

Ȉ

MAGENTA(FRONT)

Dȇxxx

Ȉ

MAGENTA(REAR)

0

A:ġ

Aȇxxx

Bȇxxx

Ȉ

CYAN(FRONT)

Ȉ

CYAN(REAR)

SIMULATIONġ NO.50-20

REGISTRATIONġ ADJUSTMENT : FRONT-REAR DIRECTION

xxx

1 199ġ

OK

TEST

EXECUTE

CLOSE

Cȇxxx

Ȉ

MAGENTA(FRONT)

Dȇxxx

Ȉ

MAGENTA(REAR)

EXECUTE

10-key

End of print

㪝㩷㫊㫀㪻㪼㩷㫄㪸㫉㫂

A

㪩㩷㫊㫀㪻㪼㩷㫄㪸㫉㫂

A

A

A

A

A

C

C

C

C

C

C

B

B