Bedienungsanleitung Brother MFC-L8900CDW (Seite 760 von 764) (Englisch)

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Home > Appendix > Important Information About Toner Cartridge Life

Important Information About Toner Cartridge Life

Toner Cartridge Life

This product detects the life of the toner cartridges using the following two methods:

• Detection by counting the dots of each colour that are necessary to create an image

• Detection by counting the rotations of the developer roller

This product has a function that will count the dots of each colour used to print every document and the rotations

of each toner cartridge’s developer roller. The print operation will stop when either of the upper limits is reached.

The upper limit is set above the number of dots or rotations that would be required for the cartridge to perform

consistently with its advertised page yield. This function is intended to reduce the risk of poor print quality and

damage to the machine.

There are two messages that indicate when the toner is low or needs replacing: 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

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

machine. During calibration, the density level adjustment test patterns are printed on the belt unit.

Calibration is mainly performed at the following times:

• When the user manually selects 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 machine detects 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 machine, 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 (for

example, 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 the user manually selects 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.

Related Information

•Appendix

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