MX-1800N (serv.man14). Section 6 - Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 14

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