AR-C260 (serv.man11). (8) Setting Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 9

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 9

When the image pattern on the front frame side is skewed to the right
(arrow direction A) with the rear frame side as the reference, turn the
adjustment screw clockwise. When the image pattern is skewed to the
left (arrow direction B), turn the adjustment screw counterclockwise.

When the adjustment screw is turned 1/4 rotation, the image position is
shifted by one dot.

Remark: The print engine image focus adjustment is performed by

changing the distance between the LED array unit and the
OPC drum.

The print engine image skew adjustment is performed by
changing the parallelism of the LED array unit for the OPC
drum.

If either of the two adjustments is performed, it may affect the
other adjustment due to the machine structure.

After completion of the above procedures, check that both of
the above two adjustments are satisfied.

There are two methods of the image registration adjustment: the man-
ual adjustment and the automatic adjustment. Either of them uses the
simulation.

This adjustment is required in the following cases:

• When the scanner (writing) unit is replaced.

• When the scanner (writing) unit is removed from the machine.

• When color image mis-resist is generated in the main scanning

direction.

• When color image mis-resist is generated in the sub scanning direc-

tion.

• When installation or the installing place is changed.

• When maintenance is performed. (When the OPC drum, the photo-

conductor cartridge, the transfer unit, or the transfer belt is replaced.)

• When U2 trouble occurs.

• When ICU PWB is replaced.

• When EEPROM on ICU PWB is replaced.

Remark: Though SIM 50-22 is not performed under the following con-

ditions, the image registration adjustment is performed auto-
matically.

∗

When the toner cartridge is replaced.

∗

At every 8,000 copies (total of print quantity and copy quantity)
(When 8,000 copies is reached during a job, the machine stops after
completion of the job.)

If the set item AR of SIM 44-1 is set to OFF (Disable), the above oper-
ation is not performed.

After setting the image registration to the best by SIM 50-20, when the
image registration adjustment is automatically performed, the best-
adjusted condition may be varied. To avoid this, set the item AR of SIM
44-1 to OFF (Disable).

Before executing this adjustment, check that the following adjustments
have been properly completed.

∗

Print engine image focus adjustment (Scanner (writing) unit)

∗

Print engine image skew adjustment (Scanner (writing) unit)

∗

Image registration sensor adjustment

This adjustment is used to perform the image registration adjustment in
the main scanning direction and in the sub scanning direction at the
same time with the simulation.

1) Enter the SIM 50-22 mode.

SIM 50-22

2) Press the [EXECUTE] key.

The [EXECUTE] key is highlighted, and the image registration
automatic adjustment is started. After completion of the adjust-
ment, the [EXECUTE] key returns to the normal display.

The adjustment process status is indicated with (

∗

) mark. It takes

several minutes to complete the adjustment.

3) Enter the SIM 50-20 mode.

SIM 50-20

4) Select the A4 (11 x 8 1/2) size paper feed tray.

5) Press the [EXECUTE] key.

The image registration adjustment pattern is printed.