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D
There are two messages that indicate when the toner nears or reaches its life end: Toner Low
and Replace Toner.
Toner Low is displayed on the LCD when the number of dots or rotations of the developer
roller nears its maximum count: Replace Toner is displayed on the LCD when the number
of dots or rotations of the developer roller reaches its maximum count.
Colour Correction D
The number of developer roller rotations that are counted may not only be for normal operations
such as printing and copying, but also for machine adjustments, such as Colour Calibration and
Colour Registration.
Colour Calibration (Adjustment of Colour Density)
To obtain stable print quality, the density of each toner cartridge needs to be maintained at a
fixed value. If the density balance between the colours cannot be kept, the tint becomes
unstable, and accurate colour reproduction becomes unavailable. The toner density can
change due to chemical changes to the toner that affect its electrical charge, deterioration of
the developer unit, and temperature and humidity levels in the device. When calibration occurs,
the density level adjustment test patterns are printed on the belt unit.
Calibration is mainly performed at the following times:
When you manually select calibration from the operation panel or the printer driver.
(Please perform calibration if colour density needs to be improved.)
When a used toner cartridge is replaced with a new one.
When the printer senses that the ambient temperature and humidity have changed.
When a specified number of printed pages is reached.
Colour Registration (Correction of Colour Position)
In this device, the drum unit and developer unit are prepared for black (K), yellow (Y), magenta
(M), and cyan (C), respectively. Four colour images are combined into one image, and
therefore colour registration errors (i.e., how the four colour images align) might occur. When
registration errors occur, registration correction test patterns are printed on the belt unit.
Registration is mainly performed at the following times:
When you manually select registration from the operation panel.
(Please perform registration if a colour registration error needs to be corrected.)
When a specified number of printed pages is reached.
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  • Firmware update on printer DCP-L8400-CDN failed. Printer hangs with a white screen. Power off doesn't work.
    How to recover? Submitted on 3-8-2020 at 10:30

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Brother DCP-L8400CDN User Manual - German - 214 pages

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