MX-C250, MX-C250E, MX-C250F, MX-C250FE, MX-C250FR, MX-C300F, MX-C300W, MX-C300WE, MX-C300A, MX-C300WR (serv.man6). Service Manual (Revised May 2016). - Sharp Copying Equipment Service Manual (repair manual). Page 126

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MX-C250  SIMULATION  6 – 48
The color balance adjustment is automatically performed.
The adjustment pattern is printed out. Check it for any abnor-
mality.
4) Press [OK]/[START] key.
The list of the adjustment items (for each dither) is displayed.
5) Select an adjustment item (for each dither).
6) Press [OK]/[START] key. (A4 or 11" x 8.5" paper is automatically
selected.)
The color patch image (adjustment pattern) is printed out.
7) Set the color patch image (adjustment pattern) printed in the
procedure 6) on the document table so that the thin lines on the
printed color patch image (adjustment pattern) are on the left
side. Place 5 sheets of white paper on the printed color patch
image (adjustment pattern).
8) Press [OK]/[START] key.
The color balance adjustment is automatically performed.
The adjustment pattern is printed out. Check it for any abnor-
mality.
9) When [OK]/[START] key is pressed, the adjustment result is
registered and the adjustment mode is terminated. When [EXE-
CUTE] key is pressed, the adjustment result is registered and
the screen is shifted to the other item (Mode/Image) select
menu.
To execute the adjustment of the other item (Mode/Image),
press [EXECUTE] key.
After completion of all the adjustments of the items (Mode/
Image), press [OK]/[START] key, and the adjustment results
are registered.
10)Make a copy, and check the copy image quality.
48
48-1
Purpose
:
Adjustment
Function (Purpose)
Used to adjust the scan image magnifica-
tion ratio (in the main scanning direction
and the sub scanning direction).
Section
Operation/Procedure
1) Enter the set value with 10 keys.
2) Press [OK]/[START] key. 
The set value in step 1) is saved.
When the adjustment value is increased, the image magnification
ratio is increased.
A change of "1" in the adjustment value of item 1, 3, or 5 corre-
sponds to a change of about 0.02% in the copy magnification ratio.
A change of "1" in the adjustment value of item 2, 4, or 6 corre-
sponds to a change of about 0.1% in the copy magnification ratio.
48-6
Purpose
:
Adjustment
Function (Purpose)
Used to adjust the rotation speed of each
motor.
Section
Operation/Procedure
1) Select an item to be set with Arrow keys.
2) Enter the set value with 10 keys.
3) Press [OK]/[START] key. 
The set value in step 2) is saved.
When the adjustment value is increased, the speed is increased,
and vice versa. A change of 1 in the adjustment value corresponds
to a change of about 0.1% in the speed.
49
49-1
Purpose
:
Function (Purpose)
Used to perform the firmware update.
Section
Operation/Procedure
1) Save the firmware to the USB flash drive.
2) Insert the USB flash drive into the main unit.
3) Select a target firmware file for update.
Press Arrow key to select all the Firmware collectively.
4) Press [OK]/[START] key.
5) Press [OK]/[START]  key.
The selected firmware is updated.
When the operation normally completed, "COMPLETE" is dis-
played. When terminated abnormally, "ERROR" is displayed.
Item/Display
Content
Set-
ting 
range
Default 
value
1
CCD (MAIN)
SCAN main scanning mag-
nification ratio adjustment 
(CCD)
1 - 99
50
2
CCD (SUB)
SCAN sub scanning magni-
fication ratio adjustment 
(CCD)
1 - 99
50
3
SPF (MAIN)
RSPF document front sur-
face magnification ratio 
(Main scan)
1 - 99
50
4
SPF  (SUB)
RSPF document front sur-
face magnification ratio 
(Sub scan)
1 - 99
50
5
SPFB (MAIN)
RSPF document back sur-
face magnification ratio 
(Main scan)
1 - 99
50
6
SPFB (SUB)
RSPF document back sur-
face magnification ratio 
(Sub scan)
1 - 99
50
Item/Display
Content
Min
Max
Defa
ult
COLOR
FUM
Drum motor correction value
1
99
56
DVM
Drum motor correction value
1
99
56
DM
Drum motor correction value
1
99
56
C2MM
2CStransport motor correction value 
1
99
56
MONO
FUM
Fusing motor correction value
1
99
56
DM
Drum motor correction value
1
99
56
HEAVY
FUM
Drum motor correction value
1
99
54
DVM
Drum motor correction value
1
99
56
DM
Drum motor correction value
1
99
56
Item/Display
Content
Set-
ting 
range
Default 
value
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