Read Sharp MX-4100N / MX-4101N / MX-5000N / MX-5001N (serv.man13) Service Manual online
MX-4101N ADJUSTMENTS 5 – 14
(Method 2)
a) Fit the side of A3 or 11" x 17" paper to the long side of the
rectangle print pattern.
a) Fit the side of A3 or 11" x 17" paper to the long side of the
rectangle print pattern.
b) Measure the shift distance between vertical side of paper
and side of the rectangle print pattern.
If the above distance is 0.5mm or less, there is no need to
adjust.
If not, execute the following procedures.
and side of the rectangle print pattern.
If the above distance is 0.5mm or less, there is no need to
adjust.
If not, execute the following procedures.
5)
Open the front cabinet, and remove the waste toner box.
6)
Loosen the LSU unit fixing screws (2 pcs.) and shift the skew
adjustment screw in the arrow direction to adjust the LSU (writ-
ing) unit skew.
(When Method 1 is used to check the black image for any
skew (right angle) in procedure 4 in advance)
When the lengths of the diagonal line are C > D, shift the
adjustment screw in the direction of Y.
When the lengths of the diagonal line are C < D, shift the
adjustment screw in the direction of X.
(When Method 2 is used to check the black image for any
skew (right angle) in procedure 4 in advance)
If the image is skewed in the arrow direction of A, shift the
adjustment screw to X direction. If the image is skewed in the
arrow direction of B, shift the adjustment screw to Y direction.
adjustment screw in the arrow direction to adjust the LSU (writ-
ing) unit skew.
(When Method 1 is used to check the black image for any
skew (right angle) in procedure 4 in advance)
When the lengths of the diagonal line are C > D, shift the
adjustment screw in the direction of Y.
When the lengths of the diagonal line are C < D, shift the
adjustment screw in the direction of X.
(When Method 2 is used to check the black image for any
skew (right angle) in procedure 4 in advance)
If the image is skewed in the arrow direction of A, shift the
adjustment screw to X direction. If the image is skewed in the
arrow direction of B, shift the adjustment screw to Y direction.
7)
Install the waste toner box, and close the front cabinet.
8)
Execute procedures 3) - 4).
(Repeat procedures 5) - 8) until a satisfactory result is
obtained.)
(Repeat procedures 5) - 8) until a satisfactory result is
obtained.)
9)
If the adjustment result reaches the satisfactory level, tighten
the adjustment screw.
(The black image skew adjustment is completed with the
above.)
the adjustment screw.
(The black image skew adjustment is completed with the
above.)
10) In the above black image skew adjustment, check the color
image skew pattern printed when completion of the adjust-
ment.
ment.
*A: Rough adjustment print pattern
*B: Fine adjustment print pattern
*B: Fine adjustment print pattern
In each Y/M/C color print pattern printed separately in the front
frame direction and in the rear frame direction, note the same
print color pattern and check to confirm that the difference in
the highest density sections is within
frame direction and in the rear frame direction, note the same
print color pattern and check to confirm that the difference in
the highest density sections is within
±1 step.
(Compare the front and the rear frame positions of the same-
color print color patterns. All the highest density sections of all
the print color patterns may not be aligned on a line. Compare
only the same-color patterns.)
If the above condition is not met, do the following:
color print color patterns. All the highest density sections of all
the print color patterns may not be aligned on a line. Compare
only the same-color patterns.)
If the above condition is not met, do the following:
11) Turn the image skew adjustment screw of the target color to
adjust.
When each adjustment screw is turned, it clicks. Turn it by
5 - 6 clicks and the check pattern is changed by 1 step (1
dot size).
When the image skew pattern on the front frame side is
skewed in the arrow direction of A (to the smaller number) from
the rear frame side, turn the adjustment screw counterclock-
wise. When the image is skewed in the arrow direction of B (to
the larger number), turn the adjustment screw clockwise.
5 - 6 clicks and the check pattern is changed by 1 step (1
dot size).
When the image skew pattern on the front frame side is
skewed in the arrow direction of A (to the smaller number) from
the rear frame side, turn the adjustment screw counterclock-
wise. When the image is skewed in the arrow direction of B (to
the larger number), turn the adjustment screw clockwise.
12) Print the check pattern.
13) Check the color image skew pattern.
13) Check the color image skew pattern.
Repeat procedures 11) - 13) until a satisfactory result is obtained.
The image skew adjustment (LSU unit) is executed by changing
the parallelism of the LSU unit scan laser beam for the OPC drum.
The image skew adjustment (LSU unit) is executed by changing
the parallelism of the LSU unit scan laser beam for the OPC drum.
4
(
A3 or 11 x 17 paper
0.5mm or less
Comparison line
Direction
B
Direction
A
X
Y
4
(
Cy
an
an
*A
Direction B
Direction A
Magenta
Y
ello
w
*B
*B
C
Y
M
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