Canon imageRUNNER ADVANCE 6075 Series, Руководство по обслуживанию

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Technology > Image Formation System > Servicing > Troubleshooting
Technology > Image Formation System > Servicing > Troubleshooting
CAUTION:
It is difficult to judge whether uneven potential of the Photosensitive Drum causes
uneven density of the output image, so output 3 sheets of the test print and adjust the
area where all 3 sheets have the same symptom.
(If the same symptom is seen on the same spot of all 3 sheets, it is possibly caused
from the Drum.)
<Test pattern>
NOTE:
For the test print, the following 3 types can be output, but basically set SHD-P1 to
output. The following shows the use case of each test print.
COPIER>FUNCTION>2D-SHADE>SHD-P1
: When the image which uneven density occurs is the halftone image with light density
COPIER>FUNCTION>2D-SHADE>SHD-P2
: When the image which uneven density occurs is the halftone image with dark density
COPIER>FUNCTION>2D-SHADE>SHD-P3
: In case of the secure watermark image with uneven density
F-2-116
5) Check (T-shaped) halftone area of the output test print visually and adjust the area of
uneven density.
5-1) Take a note to write down the values of the following service mode.
When the adjustment cannot be performed appropriately, these values are required to
return to the initial values.
COPIER>FUNCTION>2D-SHADE>M-LINE1 (Level 2)
COPIER>FUNCTION>2D-SHADE>M-LINE2 (Level 2)
COPIER>FUNCTION>2D-SHADE>S-LINE1 (Level 2)
COPIER>FUNCTION>2D-SHADE>S-LINE2 (Level 2)
COPIER>FUNCTION>2D-SHADE>S-LINE3 (Level 2)
COPIER>FUNCTION>2D-SHADE>S-LINE4 (Level 2)
5-2) Adjust the target horizontal scanning direction (A to O) which uneven density is seen.
After selecting "M-LINE1/M-LINE2", select the target horizontal scanning window (A to
O), and enter the numerical value using "numerical keypad".
COPIER>FUNCTION>2D-SHADE>M-LINE1 (Level 2) Horizontal scanning direction A
to H
COPIER>FUNCTION>2D-SHADE>M-LINE2 (Level 2) Horizontal scanning direction I
to O
CAUTION:
• Be sure to switch the screen after entering the value. Unless the screen is switched,
the numerical value is not reflected. (Actually, the value is not reflected on the
screen, but it is retained internally.)
• When the horizontal scanning direction (H line) is adjusted, the adjustment value of
the vertical scanning direction (1 to 27) is also changed.
• As the value is larger, the density becomes lighter. As the value is smaller, the
density becomes darker.
• Enter the adjustment value in a unit of +/- 30 gradually, output the test pattern
and make adjustment while checking the test pattern. If the value is changed
dramatically, the image error (while line) may occur.
• Be sure to make adjustment in order of horizontal and vertical scanning directions. If
the adjustment is executed in the inverse order, it may not be executed correctly.
• Entering 96 or larger value can generate an error in potential control (E061).
In the case of an error, adjust the setting value between 0 and 95