2JZ/2JX/2JV/2H7-1
1-3-114
U412
Adjusting the uneven density
Description
Adjusts the uneven developing/transfer density in the drum axis direction by scanning directly the density dis-
tribution of test pattern with the scanner and adjusting LSU light quantity.
Purpose
To perform when replacing the developing, drum unit, transfer belt unit or laser scanner unit.
Method
1. Press the start key.
2. Select the item. The screen for executing is displayed.
Method: [Adjust Uneven Density]
1. Select [Adjust Uneven Density].
2. Select [Default Value].
A test pattern is outputted with the initial light quantity setting.
3. Place the output test pattern as the original.
Place approximately 20 sheets of white paper on the test pattern and set them.
4. Press the start key.
The color difference data is calculated.
5. A test pattern is outputted.
A test pattern is outputted with light quantity setting lower than the first test pattern by 10%.
6. Place the output test pattern as the original.
Place approximately 20 sheets of white paper on the test pattern and set them.
7. Press the start key.
The color difference data is calculated.
8. A test pattern is outputted.
A test pattern based on uneven density correction is outputted.
9. Place the output test pattern as the original.
Place approximately 20 sheets of white paper on the test pattern and set them.
10. Press the start key.
The correction result is checked.
11. When normally completed, [COMPLETE] is displayed.
If a problem occurs during auto correction, error code is displayed.
Error codes
Maintenance
item No.
Description
Display Description
Adjust Uneven Density Executing the uneven density correction
ON/OFF Config Uneven density correction ON/OFF setting
Codes Description Corrective measures
S01 Order error Check the original
S02 Patch not detected Check the original
S03 Original deviation in the main scanning direction Check the original
S04 Original deviation in the auxiliary scanning direction Check the original
S05 Original inclination error Check the original
E01 Background blur Run again
E02 Color patch density error Run again
E03 Calculation result out of threshold value Run again from step 4
E04 Other error After turning the power off
and on, run again
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