Chapter D
220
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 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 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
fixed 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 specified number of printed pages is reached.
Color Registration (Correction of Color Position)
In this device, the drum unit 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 selectsregistration from the operation panel.
(Please perform registration if a color registration error needs to be corrected.)
• When a specified number of printed pages is reached.
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General
Weight and Dimensions
