MX-1800N (serv.man14). Section 6 - Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 54

MX-1800N  ADJUSTMENTS  6 – 54

1) Enter the SIM 67-25 mode.

2) Touch [EXECUTE] key. (A3 or 11" x 17" paper is automatically

selected.)
The color balance adjustment pattern is printed.

3) Check that the following specification is satisfied or the desired

color balance is obtained.
If the above specification is not satisfied, perform the following
procedures.

The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed.
The density level of each color must be almost at the same
level.
Patch B may not be copied.
Patch A must not be copied.
When, however, the color balance is adjusted according to a
request from the user, there is no need to set to the standard
color balance stated above.

4)

Select the color to be adjusted with the color select key, and
select the adjustment point with the scroll key.

5)

Enter the adjustment value with 10-key and touch [OK] key.
The adjustment value is set in the range of 245 – 755 (1 –
999). When SIM 67-24 is used to adjust the automatic color
balance and density, all the set values of this simulation are set
to 500.
To increase the density, increase the adjustment value. To
decrease the density, decrease the adjustment value.
Repeat procedures of 2) – 5) until the condition of 3) is satis-
fied.

When the overall density is low, or when the density is high
and patch A is copied, use the arrow key to adjust all the
adjustment values of A – O to a same level collectively.
Then, adjust each patch density individually. This is an efficient
way of adjustment.
Referring to the black and gray patches, adjust so that each
process (CMY) black/gray patch color balance of A – O
approaches the black/gray patch level as far as possible.

6)

Cancel SIM 67-25.
(For the machine which supports only the GDI mode, the
adjustment is completed.)

7)

Use SIM 64-5 to print the print test pattern.
NOTE: Only for the machine which support the PCL mode.
(For the machine which supports only the GDI mode, this pro-
cedure cannot be used.)
Set each set value to the default and touch [EXECUTE] key.
The print test pattern is printed out.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed. The density level of each color must be
almost at the same level.

8)

Use SIM 44-26 to execute the half tone image correction (forc-
ible execution).
Enter the SIM 44-26 mode and touch [EXECUTE] key.
[EXECUTE] key is highlighted and the operation is started.

It takes several minutes to complete the operation. After com-
pletion of the operation, "COMPLETE" is displayed.
(Normal end (Auto transition))

EXECUTE

EXECUTE

OK

CLOSE

0

A:

A㧦 xx

B㧦 xx

C㧦 xx

㧧

POINT1

㧧

POINT2

㧧

POINT3

SIMULATION NO.67-25

PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT 㧦PG

xx

㨇

1㨪 99㨉

OK

TEST

K

C

M

Y

EXECUTE

D㧦 xx

㧧

POINT4

0

A:

A㧦 xx

B㧦 xx

C㧦 xx

㧧

POINT1

㧧

POINT2

㧧

POINT3

SIMULATION NO.67-25

PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT 㧦PG

xx

㨇

1㨪 99㨉

OK

TEST

K

C

M

Y

EXECUTE

D㧦 xx

㧧

POINT4

CLOSE

0

A:

A㧦 xx

B㧦 xx

C㧦 xx

㧧

POINT1

㧧

POINT2

㧧

POINT3

SIMULATION NO.67-25

PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT 㧦PG

xx

㨇

1㨪 99㨉

OK

TEST

K

C

M

Y

EXECUTE

D㧦 xx

㧧

POINT4

CLOSE

10-key

or self print end

Max

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

High density

Low density

C

M

Y

Bk

CMY
mixed
color

3) Patch C or D of each of Y, C, M,

and BK is very slightly copied.

2) Patch A of each of Y, M,

C, and BK are not copied.

4) Patch for each of C, M, Y, BK
• The patch density is identical between patches or not reversed.
• The patch density is changed gradually.

1) The max. density

section is not blurred.

SIMULATION NO.44-26

TEST

HALF TONE DENSITY CORRECT EXECUTION

EXECUTE

0

CLOSE

TOUGH [EXECUTE] THEN EXECUTION START.

K

M

Y

C

SIMULATION NO.44-26

TEST

HALF TONE DENSITY CORRECT EXECUTION

[S_VALUE]

#1: 907, #2: 902, #3: 909, #4:921, #5:936

#6: 347, #7:992, #8:1047, #9:1081, #10:1137

#11:1183, #12:1222, #13:1261, #14:1283,#15:1260

1/1

EXECUTE

CLOSE

0