Sharp MX-4100N Service Manual page 127

6) Check the color balance and density.
There are two methods to check the color balance and density.
(Method 1)
Check to insure that the printed color balance check patch
image is within the following specifications.
Low density
2) Patch C or D of each of Y, C, M, and
BK is very slightly copied.
Patch A of each of Y, M, C, and
BK are not copied.
1) The max. density section is not blurred.
3) Patch for each of C, M, Y, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
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.
(Method 2)
By printing the color balance adjustment sheet with SIM 67-25
and comparing each process (CMY) black patch color balance
with the black patch, the color balance adjustment can be
checked more precisely.
Low density
2) Patch C or D of each of Y, C, M,
and BK is very slightly copied.
Patch A of each of Y, M, C, and
BK are not copied.
The max. density section is not blurred.
3) Patch for each of C, M, Y, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
If the color balance of each patch of the process black (CMY
mixed color) is slightly shifted to Magenta, it means that the
adjustment is proper. In an actual print mode, it is converted
into the natural gray color balance by the color table. (When
the color balance target is DEF 1.)
(Method 3)
Use SIM64-5 to print the print test pattern, and check the color
balance and density.
Set each set value to the default and press [EXECUTE] key.
High density
The print test pattern is printed out.
Use SIM64-5 to print the print test pattern, and check the color
balance and density. (Refer to the item of the printer color bal-
ance and density check.)
When the factory target is selected in the procedure 4) and the
auto adjustment is executed but a satisfactory result is not
obtained on the color balance and the density, use SIM 67-26
to change the factory color balance target and repeat the pro-
cedures from 1).
If a satisfactory result is not obtained with the above proce-
dure, perform the manual color balance adjustment (ADJ
20C).
When the service target is selected in the procedure 4) and the
auto adjustment is executed but a satisfactory result is not
obtained, execute the manual color balance adjustment (ADJ
21C).
Cancel SIM 67-25.
If a satisfactory result on the print color balance and the density is
not obtained with the automatic adjustment, execute the manual
adjustment (SIM 67-25) (ADJ 21B).
21-B
This adjustment is needed in the following situations:
* When the copy color balance/density adjustment is required.
Refer to the page of the ADJ print color balance/density adjust-
ment.
* After the copy color balance/density adjustment.
a. General
The color balance adjustment (Manual adjustment) is used to
adjust the printer density (17 pts for each color) of C, M, Y and K.
This is used at the following situation. When the result of auto
adjustment described above is not existing within the range of ref-
erence. When a fine adjustment is required. When there is request
from the user for changing (customizing) the color balance.
In this manual adjustment, adjust only the color patch which could
High density
not adjusted properly in the automatic adjustment.
If the color balance is improper, execute the automatic color bal-
ance adjustment in advance, and execute this adjustment for better
efficiency.
b. Note for the color balance adjustment (Manual adjustment)
1) After execution of the copy color balance/density adjustment.
2) When setting the color patch image adjustment pattern on the
document table, place 5 sheets of white paper on the color
CMY
patch image adjustment pattern.
Blend
3) Be sure to use the specified paper for color.
MX-5001N ADJUSTMENTS 5 – 85
Printer color balance adjustment (Manual
adjustment)