Xerox 7300B - Phaser Color Laser Printer Study Manual page 27

Remove and Replace Toner Cartridges
In this exercise, you will remove and replace Toner Cartridges and clean the LED assembly
lenses.
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Toner Cartridge Life Expectancy
There are two types of Toner Cartridges available for the printer: standard and high-capacity. The
life expectancy of each Toner Cartridge is based on an average 5% coverage per color:
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As the toner coverage for prints increases, the life expectancy of the Toner Cartridge decreases
proportionately. Therefore, if the toner coverage doubles to 10%, the life expectancy of a standard
cartridge drops to 3,750, half of the standard life.
Multiple short print jobs (less than 5 pages) reduce the life expectancy of the Toner Cartridges. A
single print job of 100 pages uses less toner than 100 individual single-page print jobs. Toner
Cartridge life expectancy is also reduced each time the top cover is opened and closed, and when
the printer is turned off and then on.
Imaging Units
The four LED assemblies neutralize the negative charge on the Imaging Units to form latent
images. Toner is then applied to the neutralized areas to develop the image. The images are
transferred directly to the paper, where the images are overlaid to form the composite color image.
Each Imaging Unit is keyed using a plastic tab on the right side, which ensures it is installed only
into the correct location within the printer. Front Panel messages indicate when the Imaging Units
should be replaced.
PHASER 7300 CARE WORKSHEET
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To avoid damage to the Imaging Units that degrades print quality, do not
expose them to light for more than 10 minutes.
Refer to the Toner Cartridge instruction sheet on the Phaser 7300 Customer
Support Training CD-ROM for Information on replacing Toner Cartridges.
Using the Toner Cartridge instruction sheet, remove and replace the black Toner
Cartridge while observing the procedure closely.
Remove and replace the magenta Toner Cartridge.
Using a lint-free cloth, clean the lens area on the LED assemblies.
The LED assemblies should be cleaned to remove toner dust, which causes
light or dark vertical lines to appear on prints. A lint-free cloth is packaged
with each replacement Toner Cartridge.
Standard cartridge - 7,500 images
High capacity cartridge - 15,000 images
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