Canon imageRUNNER ADVANCE 6055 Series, Руководство по обслуживанию

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Technology > Image Formation System > Servicing > Troubleshooting
Technology > Image Formation System > Servicing > Troubleshooting
● Uneven density
[Cause]
Uneven density occurs on the image because of uneven developing performance or change
in drum characteristics due to wear.
[Field Remedy]
Start the field remedy
Adjust height of the Primary Charging Wire
(Set the dark area apart)
Adjust developing bias
COPIER > ADJUST > VCONT > DE-OFST
Enable 2D shading
COPIER > OPTION > IMG-LSR > 2D-SHADE; ON
Execute 2D shading individual correction
Field remedy is complete
YES
YES
YES
NO
NO
NO
Is it straight uneven density?
Is it fixed?
Is it fixed?
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Feed Direction
OR
In the case of dark/light image at either the left or right side on the image in horizontal
direction, adjust height of the Primary Charging Wire and check the output result. When
making adjustment, execute the work while keeping the wire at dark area apart.
Feed Direction
OR
If it is not a straight uneven density, change the value of the following service mode in
decrement of -10 and check the output result.
COPIER > ADJUST > VCONT > DE-OFST
(Setting value: default 0, -10, -20, …-50)
CAUTION :
Executing the above setting can generate smeared image or foggy image.
After switching the mode to enable 2D shading in the following service mode, turn OFF/ON
the main power and check the output result.
(For detailed procedure, see “Troubleshooting > Uneven density correction by 2D shading >
Step 1) to 3) (Refer to page 6-7)
COPIER > OPTION > IMG-LSR > 2D-SHADE Setting value: 1 (ON)
Output the test pattern for 2D shading and adjust the uneven density area individually.
(For detailed procedure, see “Troubleshooting > Uneven density correction by 2D shading >
Step 4) to 5) (Refer to page 6-7)
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