MX-M904, MX-M1204 (serv.man10). Service Manual (Revised May 2017). - Sharp Copying Equipment Service Manual (repair manual). Page 127

MX-M1204  ADJUSTMENTS  5 – 87

 

 

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) Open the DSPF document scan section, and insert the white

reference jig (PSHEP5859FCZZ). Then, close the DSPF docu-
ment scan section, and close the DSPF.

3) Enter the SIM 63-2 mode.
4) Select "DSPF SHADING".
5) Press [EXECUTE] key. (The shading adjustment process is

started.)
* 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.

 

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-0280FCZZ or UKOG-0280FCZ1) 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.

Insert from the notch of the white 
reference jig, and set.

White reference jig set reference 

Insert so that the rear edge of the white 
reference jig is in parallel with the transport roller 
(as shown with the dotted line in the figure).

Insert so that the rear edge of the white reference 
jig is fit with the upper transport PG edge. 

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