MX-6240N, MX-7040N (serv.man24). Section 5 Adjustments and Settings - Updated November 2012 - Sharp Copying Equipment Service Manual (repair manual). Page 98

MX-7040N  ADJUSTMENTS AND SETTINGS  5 – 98

 

Before executing this adjustment, be sure to check the following
items.

* There must be no unevenness in charging.

* There must be a tray with A4 (LT) paper in it.

* When this adjustment (FR density unevenness automatic adjust-

ment) is executed after execution of ADJ22-B (FR density
unevenness manual correction), the value of the manual correc-
tion will be cleared. In order to keep the value of manual correc-
tion, do not execute this automatic correction.

 

This adjustment must be performed in the following cases:

* When unevenness occurs in the main scanning direction:

1)

Enter the SIM 61-11 mode.

2)

Press the [AUTO CORRECTION] key.

When [DATA] key is pressed, the current correction value of
"FR density unevenness automatic correction" can be
checked.

3)

Press the key of the density to be checked and press [EXE-
CUTE] key. The shading manual correction data are cleared,
the high density process control is started, and self printing of
the adjustment patch is started.

During execution, [EXECUTE] is highlighted.

4)

After completion of self printing, the machine enters the
standby state for output patch scan start.

5)

Set the printed sample for scanning on the OC in the A4R
(LTR) direction, and press [EXECUTE] key to start scanning.

During execution, [EXECUTE] is highlighted.

Set the document so that the arrow direction is fit with the left
edge section for scanning.

6)

After completion of scanning the patch, the shading data are
revised and the half tone process control is forcibly executed.
Then, self print of the adjustment result patch is automatically
started.

During execution, [EXECUTE] is highlighted.

7)

After completion of self printing, the following screen is dis-
played.

The FR density unevenness can be improved by pressing
[RETRY] key and repeating procedures 3) - 7).

8)

To reset the adjustment values to the default (factory setting),
use SIM61-13 to clear the automatic and manual correction
values.

9)

After completion of all adjustments, be sure to execute SIM46-
74 (Copy color balance adjustment).

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