If the print result has uneven density, correct it so the density becomes uniform. You cannot perform correction while printing or scanning or when there is insufficient toner.
There are two methods for correcting uneven density: correct it automatically by scanning a printed test page with the machine, or correct it by manually entering density values. Measure the density values with a densitometer or perform a visual check.
Performing frequent correction may affect the lifetime of the toner.
If the symptoms do not improve even after performing correction, the remaining amount of toner may be low. It is recommended to check the remaining amount of toner, and replace any toner containers, as needed.
Scan the printed test page with the machine, have the density values determined and corrected. The two available methods for scanning and automatically correcting images are Quick Adjust and Full Adjust.
The [Select Paper] screen is displayed. You can check the usable paper sizes and currently selected paper type.
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Select the paper source with the loaded usable paper, and press [OK].
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Press [Start Printing].
Two sheets of test pages are printed.
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Open the feeder.
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Follow the instructions on the screen to place the test page 1 on the platen glass.
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Gently close the feeder.
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Press [Start Scanning].
Test page 1 is scanned.
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Remove test page 1 from the platen glass.
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Repeat Steps 8 to 11 to scan the test page 2.
The test page is scanned, and correction is performed.
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Press [Start Printing].
A test page is printed.
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Open the feeder.
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Follow the instructions on the screen to place the test page on the platen glass.
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Gently close the feeder.
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Press [Start Scanning].
The test page is scanned, and correction is performed. When correction is complete, [Adjustment is complete.] is displayed.
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Remove the test page from the platen glass.
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Press [OK] [Close].
Correcting by Entering Density Values (Checking with a Densitometer)
Measure the printed test page with a commercial densitometer and enter the measured density values to make corrections so that the density of halftone areas is uniform.
Use the control panel to perform correction. You cannot perform correction using Remote UI from a computer.
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On the control panel, press [ Settings/Registration] in the [Home] screen or other screen. [Home] Screen
Correcting by Entering Density Values (Visual Correction)
If you do not have a densitometer or the result after correction using a densitometer is not as expected, visually check the printed test page, and determine and correct the density values.
Use the control panel to perform correction. You cannot perform correction using Remote UI from a computer.
1
On the control panel, press [ Settings/Registration] in the [Home] screen or other screen. [Home] Screen
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Settings/Registration] in the [Home] screen or other screen. [Home] Screen
[Adjust Image Quality] 
