MX-C310, MX-C311, MX-C312, MX-C380, MX-C381, MX-C400, MX-C401 (serv.man125). Revised Service Manual. - Sharp Copying Equipment Service Manual (repair manual). Page 102

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MX-C401  ADJUSTMENTS  4 – 71
2)
When setting the adjustment pattern on the document table in
the automatic color balance adjustment procedures, place 5
sheets of white paper on the adjustment pattern in order to
prevent back copying and adverse effects of paper wrinkles as
far as possible.
c. Adjustment procedures
1)
Enter the SIM67-54 mode.
(4.3 Inch LCD model)
(8.5/7.0 Inch LCD model)
2)
Press [EXECUTE] key. (A4 or 11" x 8.5" paper is automatically
selected.)
The color patch image (adjustment pattern) is printed out.
3)
Set the color patch image (adjustment pattern) paper printed in
procedure 2) on the document table.
Set the printed color patch image (adjustment pattern) on the
document table. Place the color patch image so that the fine
lines are on the left side in the center reference. At that time,
place 5 sheets of white paper on the printed color patch image
(adjustment pattern).
4)
Press [EXECUTE] key.
The color balance adjustment is automatically performed.
The adjustment pattern is printed out. Check it for any abnor-
mality.
5)
Press [OK] key.
The list of the adjustment items (for each dither) is displayed.
6)
Select an adjustment item (for each dither).
7)
Press [EXECUTE] key. (A4 or 11" x 8.5" paper is automatically
selected.)
The color patch image (adjustment pattern) is printed out.
8)
Set the color patch image (adjustment pattern) paper printed in
procedure 2) on the document table.
Set the printed color patch image (adjustment pattern) on the
document table. Place the color patch image so that the fine
lines are on the left side in the center reference. At that time,
place 5 sheets of white paper on the printed color patch image
(adjustment pattern).
9)
Press [EXECUTE] key.
The color balance adjustment is automatically performed, and
the machine goes to the state of procedure 6).
To complete the adjustment and enable the adjustment result,
press [OK] key.
10) Make a print, and check the print image quality.
NOTE: Use SIM67-52 to reset the adjustment values to the default
values.
 
ADJ 16
Manual paper feed tray paper 
size (width) sensor adjustment
This adjustment is needed in the following situations:
* The manual paper feed tray section has been disassembled.
* The manual paper feed tray unit has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
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Select item 
(Mode)
Content
Heavy Paper
Adjustment item to improve the color balance in the heavy 
paper mode
1200dpi 1bit
Adjustment item to improve the color balance in 1200dpi 
mode (When 1200dpi mode is frequently used)
600dpi 1bit
Adjustment item to improve the color balance in 600dpi, 
1bit mode.
B/W
Adjustment item to improve the density and gradation in 
the monochrome mode
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