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MX-M700N ADJUSTMENTS 6 – 11
3)
Check for distortions in the main scanning direction.
If the four angles of the rectangle on the copy are right angles,
there is no distortion and therefore no further steps are
needed.
If there is some distortion in the main scanning direction, do
the following steps.
4)
Check the difference (distortion balance) between left-hand
and right-hand side images distortions.
If Lc = Ld, the distortion on the left is equal to that on the right.
(The distortions are balanced.)
If the above requirement is satisfied, then do the steps
described in "ADJ 3E: Adjust scanned image distortions in the
main scanning direction – 2".
If the above requirement is not met, then do the following
steps.
5)
Change the height balance of the front frame side scanner rail.
* If the paper leading edge is more distorted than the paper
trailing edge, then raise the scanner rail right side.
* If the leading edge is less distorted than the paper trailing
edge, then lower the scanner rail right side.
6)
Set the test chart made in step 1 on the document table, and
make a copy on A3 (11" x 17") paper.
7)
Check the image distortion balance in the main scanning direc-
tion.
Repeat steps 5 to 7 until the difference in size of image distortion
(distortion balance) in the image scanning direction is equal.
3-E
Adjust scanned image distortions in the
main scanning direction – 2
This adjustment is needed in the following situations:
* The scanner (reading) section has been disassembled.
* Scanned images are distorted.
1)
Make a test chart on A3 (11" x 17") paper as shown below.
(Draw a rectangular with four right angles.)
2)
Set the test chart made in step 1 on the document table, and
make a copy on A3 (11" x 17") paper.
3)
Check for distortions in the main scanning direction.
If the four angles of the rectangle on the copy are right angles,
there is no distortion and therefore no further steps are
needed.
If there is some distortion in the main scanning direction, do
the following steps. These steps assume that there is no or lit-
tle difference in distortion between the paper's leading and
trailing edges.
If there is some difference in distortion between the paper's
leading and trailing edges, these steps should be preceded by
the adjustment steps described in "ADJ 3D: Adjust scanned
image distortions in the main scanning direction - 1", intended
to provide almost the same level of distortion on the leading
and trailing edges.
Lc
Ld
Lc
Ld
Copy A
Copy B
There is no difference
between the distortion on
the right and that on the left.
Lc = Ld
There is some difference
between the distortion on
the right and that on the left.
L
L
L
L
L = 10mm
A5
B5
A4
A5
B4
B5
A3
A4
11
8 1 2
5 1 2
A5
B5
B4
A3
A4
A5
B5
A4
8 1 2
11
13
14
17
5 1 2
30mm