Sharp MX-3050N / MX-3060N / MX-3070N / MX-3550N / MX-3560N / MX-3570N / MX-4050N / MX-4060N / MX-4070N (serv.man9) Service Manual ▷ View online
MX-4070N 2 – 25
11) Check the copy color balance and density.
(Refer to the item of the copy color balance and density check.)
12) Check the printer color balance and density.
(Refer to the item of the printer color balance and density check.)
If the color balance or density is not in the satisfactory level even after
execution of the automatic and manual adjustments, there may be
another cause.
execution of the automatic and manual adjustments, there may be
another cause.
Troubleshoot the cause, repair or perform necessary works, and
repeat the adjustment from the beginning.
repeat the adjustment from the beginning.
If color balance or density is not satisfied, adjust the copy and printer
color balance by SIM 46-74.
color balance by SIM 46-74.
d. Copy color balance and density check
Method
Make a copy of the gray test chart (UKOG-0162FCZZ) and a copy of
the servicing color test chart (UKOG-0326FCZZ/UKOG-0326FC11),
and check that they are proper.
the servicing color test chart (UKOG-0326FCZZ/UKOG-0326FC11),
and check that they are proper.
a. Note for execution of the color balance and density check in the
color copy mode
color copy mode
To check the copy color balance and density, use the gray test chart
(UKOG-0162FCZZ) and the servicing color test chart (UKOG-
0326FCZZ/UKOG-0326FC11). Set the copy density level to "3" in
the Text/Printed Photo mode (Manual), and make a copy.
(UKOG-0162FCZZ) and the servicing color test chart (UKOG-
0326FCZZ/UKOG-0326FC11). Set the copy density level to "3" in
the Text/Printed Photo mode (Manual), and make a copy.
At that time, all the color balance adjustments in the user adjustment
mode must be set to the default (center).
mode must be set to the default (center).
In addition, be sure to use the specified paper for color.
b. Note for checking the monochrome copy mode density
To check the density, use the gray test chart (UKOG-0162FCZZ).
Set the copy density level to "Manual 3" in the Text/Printed Photo
mode (Manual).
Set the copy density level to "Manual 3" in the Text/Printed Photo
mode (Manual).
In addition, all the color balance adjustments in the user adjustment
mode must be set to the default (center).
mode must be set to the default (center).
[Check with the gray test chart (UKOG-0162FCZZ)]
In the copy density check with the gray test chart, check to insure the
following conditions.
following conditions.
For the color (gray) balance, use the servicing color test chart (UKOG-
0326FCZZ/UKOG-0326FC11) to check.
0326FCZZ/UKOG-0326FC11) to check.
[Check with the servicing color test chart (UKOG-0326FCZZ/UKOG-
0326FC11)]
0326FC11)]
In the copy color balance check with the servicing color test chart,
check to insure the following conditions.
check to insure the following conditions.
1
2
3
4
5
6
7
8
9
10
W
SHARP GRAY CHART
SHARP gray chart
Patch 1 is
slightly copied.
slightly copied.
Patch 2 is copied.
(Color copy)
1
2
3
4
5
6
7
8
9
10
W
SHARP GRAY CHART
SHARP gray chart
Patch 1 is not copied.
Patch 2 is
slightly copied.
slightly copied.
Patch 3 is copied.
(Black-and-white copy)
Serviceman chart (Color patch section)
The densities of patches 1 - 6 of
each color are properly balanced.
each color are properly balanced.
Patch 7 is slightly
copied or not copied.
copied or not copied.
(Color copy)
MX-4070N 2 – 26
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 for
the sub scanning) are not shifted.
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.
sides is not so great.
5)
There are no white and black streaks.
6)
Color texts are clearly reproduced.
7)
Solid density is not so light.
Solid density is not so light
IJ
MX-4070N 2 – 27
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
great.
great.
4)
There are no white and black streaks.
5)
Solid density is not so light.
6)
The black low-density gradation is copied slightly.
Solid density is not so light
İ
MX-4070N 2 – 28
e. Printer color balance/density check
Method
Execute SIM 64-5 to print the print test pattern.
Set each set value to the default and press [EXECUTE] key. The print
test pattern is printed.
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 each color must be almost at the same level.
the darker level. The density changing direction must not be reversed.
The density level of each color must be almost at the same level.
f. Print/scan image off-center, lead edge position adjustment
Before executing this adjustment, be sure to check the following
items.
items.
* There must be a tray with A4 (LT) paper in it.
1)
Enter the Sim. 50-10 mode.
2)
Select a paper feed source “2“ (CS1).
3)
Set A4 (11 X 8.5) paper on the CS1 paper feed tray.
4)
Check to confirm that the inside dimension of the printed half-tone
pattern is 240
pattern is 240
0.5mm.
If the above condition is not satisfied, follow and repeat the proce-
dures of ADJ4A(Service manual) until a satisfactory result is
obtained.
dures of ADJ4A(Service manual) until a satisfactory result is
obtained.
5)
Measure the void area size of the adjustment pattern in the front/
rear frame direction (F side void amount) and that in the transport
direction (Lead edge void amount).
rear frame direction (F side void amount) and that in the transport
direction (Lead edge void amount).
Check to confirm that all the following conditions are satisfied.
Calculation and input procedures of adjustment values
(Example) Lead edge void amount
(1) Measure by visual inspection.
Measurement result: 4.5mm
(2) Calculate the shift amount.
The target value is the specification value (center value) of
3mm.
3mm.
* For the F side void amount, the target is 2mm.
[4 – 4.5 = -0.5 (mm)]
[4 – 4.5 = -0.5 (mm)]
(3) Calculate the adjustment value.
Subtract 5 from the shift amount of -0.5mm.
* For the shift amount of 0.1mm, the adjustment value is
varied by 1.
When the current value is 50:
[50 – 5 = 45]
(4) Enter the adjustment value for SUB-CS.
Enter the [45].
6)
Enter MAIN-CS1 (F side void) and SUB-CS (Lead edge void), and
press OK button.
press OK button.
Enter the calculated adjustment values for the shift amount to
MAIN-CS1/SUB-CS, and press OK button. (The cursor can be
used instead of the button.)
MAIN-CS1/SUB-CS, and press OK button. (The cursor can be
used instead of the button.)
7)
After entering the adjustment values, print again and check to
confirm that the avoid amounts are adjusted to the target range.
confirm that the avoid amounts are adjusted to the target range.
• Lead edge void amount
(4.0mm terget)
(4.0mm terget)
Measure at the center of
paper.
Adjustment value
J : SUB-CS
J : SUB-CS
Print
lead edge
Main scanning magnification ratio (240 0.5mm)
Measure the dimension near the inner frame line
and the paper lead edge in parallel with the line.
Adjustment value A : BK-MAG
Measure the dimension near the inner frame line
and the paper lead edge in parallel with the line.
Adjustment value A : BK-MAG
• F side void amount (2.0mm terget)
Measure at a position near the
Measure at a position near the
paper lead edge.
Adjustment value
C : MAIN-CS1
C : MAIN-CS1
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