Sharp MX-2640N / MX-2640NR / MX-2640FN / MX-3140N / MX-3140NR / MX-3140FN / MX-3640N / MX-3640NR / MX-3640FN (serv.man37) Service Manual ▷ View online
MX-3640N MX-2640N/3140N/3640N (MAIN UNIT) 2 – 11
a. Color copy check items (Check to confirm the following:)
1) There are 12 void areas.
2) Registrations (one point for the main scanning, and one point
1) There are 12 void areas.
2) Registrations (one point for the main scanning, and one point
for the sub scanning) are not shifted.
3) The resolution of 5.0 (5 points) can be seen.
4) The color difference in gray balance between the F and the R
sides is not so great.
5) There are no white and black streaks.
6) Color texts are clearly reproduced.
7) The background density is not so light.
6) Color texts are clearly reproduced.
7) The background density is not so light.
MX-3640N MX-2640N/3140N/3640N (MAIN UNIT) 2 – 12
b. Monochrome copy check items (Check to confirm the following:)
1) There are 12 void areas.
2) The resolution of 4.0 (5 points) can be seen.
3) The density difference between the F and the R sides is not so
1) There are 12 void areas.
2) The resolution of 4.0 (5 points) can be seen.
3) The density difference between the F and the R sides is not so
great.
4) There are no white and black streaks.
5) The background density is not so light.
6) The black low-density gradation is copied slightly.
5) The background density is not so light.
6) The black low-density gradation is copied slightly.
MX-3640N MX-2640N/3140N/3640N (MAIN UNIT) 2 – 13
Method 2
Use SIM46-21 to print the colo r balance adjustment sheet, and
Use SIM46-21 to print the colo r balance adjustment sheet, and
check each process (CMY) black patch color balance and the black
patch in order to confirm that the co lor balance adjustment is
proper.
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. If the color balance of the adjustment pattern printed in this
mode is slightly shifted to Magenta, it is converted into the natural
gray color balance by the color table in an actual cop y mode.
(When the color balance target is DEF 1.)
If color balance or density is not satisfied, adjust the copy and
If color balance or density is not satisfied, adjust the copy and
printer color balance by SIM 46-74.
(3) Printer color balance/density check
Before checking the printer color balance and the density, be sure
to execute the following procedures in advance.
* Execute the high density imag e correction (Process correction)
* Execute the high density imag e correction (Process correction)
forcibly. (SIM 44-6)
* The half-tone image correction is forcibly executed. (SIM 44-26)
Method 1
Execute SIM 64-5 to print the print test pattern.
Execute SIM 64-5 to print the print test pattern.
Set each set value to the defa ult and press [EXECUTE] key. The
print test pattern is printed.
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 ea ch color must be almost at the
same level.
Method 2
Use SIM 67-25 to p rint the color b alance adjustment she et and
Method 2
Use SIM 67-25 to p rint the color b alance adjustment she et and
compare each process (CMY) black patch color balance and the
black patch to check the color balance.
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.
If the color balance of each patch of the process black (CMY mixed
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.
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.)
Q
O P
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Y
M
C
Bk
High
density
density
1) The max. density section is not blurred.
2) Patch C or D of each of Y, M, C, and BK is very slightly copied.
Low
density
density
CMY
blend
blend
3) Patch for each of Y, M, C, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
The patch density is changed gradually.
PRINTER CALIBRATION
Q
O P
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Y
M
C
Bk
1) The max. density section is not blurred.
2) Patch C or D of each of Y, M, C, and BK is very slightly copied.
Low density
CMY
blend
blend
3) Patch for each of Y, M, C, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
The patch density is changed gradually.
High density
MX-3640N MX-2640N/3140N/3640N (MAIN UNIT) 2 – 14
(4) Copy/Printer color balance and density adjustment
(Automatic adjustment)
When a printer option is inst alled, be sure to execute the a bove
item.
1) Enter the SIM46-74 mode.
2) Press [EXECUTE] key.
The high density process control is performed, and the copy
color patch image (adjustment pattern) is printed out.
(A4/11" x 8.5" or A3/11" x 17" paper is automatically selected.)
3) Set the color patch image (adjustment pattern) paper printed in
procedure 2) on the document table.
Set the color p atch image (adjustment p attern) printed in the
Set the color p atch image (adjustment p attern) printed in the
procedure 2) on the do cument table. Place the color p atch
image so that the fine lines are on the lef t side. At that time,
place 5 sheets of white paper on the printed color patch image
(adjustment pattern).
4) Select [FACTORY] target, and press [EXECUTE] key.
When the color balance is customized by the manual color bal-
ance adjustment (SIM 46-21) according to the user's request,
and the color balance is registered with SIM63-7 as the service
target, if the color balance is required to be adjusted, select the
[SERVICE] target.
The copy color balance adjustment is automatically executed
and prints the color balance check patch image.
If there is any streak or unclear print on the printed check pat-
If there is any streak or unclear print on the printed check pat-
tern, check the print engine for any problems.
5) Press [EXECUTE] key.
The printer color patch image (adjustment pattern) is printed
out. (A4/11" x 8.5" or A3/11" x 17" paper is automatically
selected.)
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Q
O P
N
M
L
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I
H
G
F
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D
C
B
A
Y
M
C
Bk
High
density
density
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density
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