2
Toner Cartridge Life
This product detects the life of the toner cartridges using the following two methods:
Detection by counting the dots of each color 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 color used to print every document
and the rotations of each toner cartridge’s developer roller. The print operation will stop when
either one of the upper limits are 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 printer.
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.
Color 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 Color Calibration and
Color Registration.
Color Calibration (Adjustment of Color Density)
To obtain stable print quality, the density of each toner cartridge needs to be maintained at
a xed value. If the density balance between the colors cannot be kept, the tint becomes
unstable, and accurate color 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 the user manually selects calibration from the operation panel or the printer driver.
(Please perform calibration if color 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 specied number of printed pages is reached.
Color Registration (Correction of Color Position)
In this device, the drum and developer unit are prepared for black (K), yellow (Y), magenta
(M), and cyan (C), respectively. Four color images are combined into one image, and
therefore color registration errors (i.e., how the four color 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 color registration error needs to be corrected.)
When the top cover is opened and closed.
When a specied number of printed pages is reached.
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(64 pages)
(40 pages)
(35 pages)
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