MX-6580N, MX-7580N (serv.man3). Service Manual (Revised June 2017). - Sharp Copying Equipment Service Manual (repair manual). Page 123

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MX-7580N  ADJUSTMENTS AND SETTINGS  5 – 73
 
ADJ 18
DSPF CCD calibration
 
18-A
Shading adjustment (Calibration) 
(DSPF mode)
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) Note before adjustment
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)
Open the DSPF document scanning section, insert the shad-
ing adjustment sheet (UKOG-0333FCZZ), and close the DSPF
document scanning section.
* When inserting the shading adjustment sheet, insert it along
the rear edge frame so that the rear edge of the shading
adjustment sheet comes to the root of the actuator.
3)
Enter the SIM 63-2 mode.
4)
Select [DSPF SHADING].
5)
Press [EXECUTE] key. (The shading adjustment process is
started.)
* The shading adjustment sheet is transported by about
25mm, and shading data are obtained during transport.
* During shading adjustment, "SHADING EXECUTING..." is
displayed.
* When [EXECUTE] key is pressed during shading adjust-
ment, the operation is interrupted.
* When shading adjustment is completed normally, [EXE-
CUTE] key returns to the normal display and "COMPLETE"
is displayed.
<Descriptions of keys>
<Result display>
 
18-B
CCD gamma adjustment (CCD calibration) 
(DSPF mode)
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) Note before adjustment
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 scanner adjustment chart (UKOG-
0356FCZZ) are free from dirt and scratches.
If they are dirty, clean them.
If they are scratched or streaked, replace with new one.
Display
Content
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)
Display
Content
COMPLETE
Normal completion
ERROR
Abnormal completion
INCOMPLETE
Incomplete, interruption
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Display

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