MX-M905 (serv.man2). Service Manual (Revised May 2017). - Sharp Copying Equipment Service Manual (repair manual). Page 125

MX-M905  ADJUSTMENTS  5 – 85

 

This adjustment is required in the following cases:

* When the DSPF CCD unit is replaced.

* When a U2 trouble occurs.

* When the DSPF control PWB is replaced.

1)

Check to insure that there is no dirt or dust on the DSPF scan-
ning glass, the mirror, and the lens surface. (If there is, clean it
with alcohol.)

2)

Check to confirm that the patches in BK1 and BK2 arrays of
the SIT chart (UKOG-0356) are free from dirt and scratches.

If they are dirty, clean them.

If they are scratched or streaked, replace with new one.

NOTE:

Since the SIT chart is easily discolored by sunlight (especially ultra-
violet rays) and humidity and temperature, put it in a bag such as a
clear file) and store in a dark place of low temperature and low
humidity.

1)

Set the SIT chart (UKOG-0356) face-down in the DSPF paper
feed tray.

If the SIT chart is not available, execute SIM 63-5 to set the
CCD gamma to the default. In this case, however, the adjust-
ment accuracy is lower when compared with the adjustment
method using the SIT chart.

2)

Enter the SIM 63-3 mode.

3)

When a color key is selected, the adjustment value of the
selected color is displayed.

* When [B] (Blue), [G] (Green), or [R] (Red) key is selected,

the selected key is highlighted and the adjustment value of
the selected color is displayed.

* Only one color key can be selected, and the selected key is

highlighted. In the initial state, [B] is selected.

* If there is a page over [

], an active display is shown and the

page moves up. If there is no page upward, the display
grays out and the operation is invalid.

If there is a page under [

], an active display is shown and

the page moves down. If there is no page downward, the
display grays out and the operation is invalid.

4)

When [DSPF] key is pressed, it is highlighted, and the color
automatic adjustment execution screen is displayed.

5)

Press [EXECUTE] key and it is highlighted and the color auto
adjustment is executed.

* When [EXECUTE] key is pressed during the automatic

adjustment, the automatic adjustment is interrupted.

6)

After normal completion, the result of calculation is displayed
in the initial screen.

* When an error occurs in execution, the following screen is dis-

played.

* When an error occurs in the automatic adjustment, all the error

patch numbers are displayed.

When [RESULT] key is pressed, the display returns to the initial
screen. (The previous value is displayed)

* When the operation is completed normally, "COMPLETE" is dis-

played. When [RESULT] key is pressed, the display returns to
the initial screen. (The calculation result of normal completion is
displayed.)
 

OC 
SHADING

OC analog correction level correction, and shading 
correction data making (Document table mode)

DSPF 
SHADING

Analog correction level correction, and shading correction 
data making (DSPF mode)

COMPLETE

Normal completion

ERROR

Abnormal completion

INCOMPLETE

Incomplete, interruption