Sharp AR-C150 Service Manual page 18

AR-C150
ADJ M7
Image skew adjustment (Scanner
(Writing) unit)
This adjustment must be performed in the following cases:
•
When the scanner (writing) unit is replaced.
•
When the scanner (writing) unit is removed from the machine.
•
When a color image mis-resist occurs.
•
When the installing location is changed.
1) Enter the SIM 64-1 mode.
Select the color mode of Black.
2) Set the values of A ∼ D of the set item as shown in the table
below, and make an A3 (11" × 17") copy. (The grid pattern is
printed.)
∗
Use the paper tray at the bottom.
SIM 64-1 set items
Parameter
A PRINT PATTERN
B PRINT START GRADATION LEVEL
C SELF PRINT Q'TY SETTING
D DENSITY MODE
Enter the input value with the 10-key and press the OK key. When
the [EXECUTE] key is pressed, printing is performed. Paper is
selected by the set item E.
3) Check the distortion of the printed image.
If the right-angle level of the traverse print line is 0.5mm or less for
the longitudinal print line of paper, there is no need to adjust.
0.5mm or less
Comporison line
Reference line
Right-angle
Set value
5
1
1
9
Longitudinal direction
4) If the image is distorted, loosen the red screw for the holder on the
chassis side, and adjust the LSU inclination with the black LSU
adjustment screw (set screw). (The LSU at the right end is black.)
After completion of the adjustment, fix the holder with the red
screw.
Red screw for the holde
5) Enter the SIM 61-4 mode.
6) Select 11×17 paper and press the [EXECUTE] key. Paper is
selected by the set item B.
The check pattern is printed.
∗
Use the paper tray at the bottom.
7) Check that the center shift between the Y/M/C print color patters is
within 0 ± 1 step.
(Check the shift between the print patterns of the same color.
Even though there is some shift between different colors, there is
no problem.)
If the above condition is not satisfied, loosen the red screw for the
holder on the front side of the chassis, and adjust the LSU adjust-
ment screw (set screw) to adjust the LSU inclination.
After completion of the adjustment, fix the holder with the red
screw.
Procedures 1) – 4): Black LSU adjustment procedures
Procedures 5) – 7): Color LSU adjustment procedures
7 – 7