MX-C250 ADJUSTMENTS 5 – 11
Fine adjustment pattern check:
Check the square frames on the R side and the F side of each
color. (Normally five sections of high density can be seen.)
Check the sub scanning direction position of the center area of
high density (one of the above five sections). These must be
on the same position on the R side and the F side.
In this case, use the sub scan direction color image shift check
scale (fine adjustment) as the reference.
Visually check the color density and make the darkest section
as the center, and use it as the read value of the shift amount.
Check that the difference in the center position of the dark den-
sity section is /- 2 step.
The positional relations of the front and the rear frame of the
print color patterns of a same color are compared. There is no
need that all the colors are in the same state. Compare only
the positional relations of color patterns of a same color.
If the above condition is not met, do the following:
11) Turn the image skew adjustment screw of the target color to
adjust.
Relationship between the adjustment screw rotating angle and
the change in the adjustment image position:
Adjustment screw rotating angle (degree) = Image shift
amount (Adjustment scale) x10
Repeat procedures 10) - 11) until a satisfactory result is obtained.
ADJ 4
Print image position, image
magnification ratio, void area,
off-center adjustment (Print
engine) (Manual adjustment)
Only when the manual adjustment is required, execute this adjust-
ment.
4-A
Print image magnification ratio adjustment
(main scanning direction) (Print engine)
(Manual adjustment)
This adjustment must be performed in the following cases:
* When the LSU (writing) unit is replaced.
* When each unit is replaced or fixed.
* When the void amount is changed by the maintenance
* When MFP PWB is replaced.
* U2 trouble has occurred.
1)
Enter the SIM 50-10 mode.
2)
Set A4 (11" x 8.5") paper in the paper feed tray.
3)
Select the paper feed tray set in procedure 2) with [UP] or
[DOWN] keys.
4)
Press [EXECUTE] key.
The check pattern is printed out.
5)
Measure the length of 14 squares around the center part of the
test print and check whether the length is 140 +/- 0.7mm.
If the above requirement is not met, do the following steps.
6)
Change the set value of set item A.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.
Repeat procedures 2) - 6) until a satisfactory result is obtained.
* After performing this adjustment, perform SIM50-22 image regis-
tration adjustment.
C
M
Y
B
A
Sim50-10 PAPER OFFSET
1
㸸
BK-MAG
100
2
㸸
MAIN-MFT 50
3
㸸
MAIN-CS2 50
1 / 3 [ 60/ 140]
Sim50-10 PAPER OFFSET
1
㸸
BK-MAG
101
2
㸸
MAIN-MFT 50
3
㸸
MAIN-CS2
50
1 / 3 [ 60/ 140]
140 +/- 0.7mm
Paper exit direction
