Canon LBP-1760 Service Manual page 27

2. Effective life
Cartridges are effective for 2.5 years following the date of manufacture, which is displayed in an
abbreviated form on the cartridge. The cartridge life span is also displayed (month and year) on
the cartridge box as 2.5 years from the date of manufacture. Cartridges should be used within
their life spans, as image quality will deteriorate after the expiry date.
c. Handling
1) When loading a new cartridge into the printer, or when blank spots appear on output images
due to uneven distribution of the toner during use, hold the cartridge at each end as shown
in the figure below. Slowly rock it 5 to 6 times at a 45-degree angle to evenly distribute the
toner, and reload it into the printer. Do not shake the cartridge in any other ways, as toner
may leak from the developing cylinder or the cleaning unit.
After loading the cartridge in the printer, print 3 to 5 sheets of test patterns and check for
toner leakage to prevent output image from dirt.
2) Remove the cartridge from the printer before transporting it. During transportation, the car-
tridge must be kept in the protective bag or thick cloth to prevent direct exposure to light.
3) Avoid placing the cartridge near CRT displays, disk drives or floppy disks, as the magnetism
generated by the cartridge may destroy the data.
4) As the photosensitive drum is sensitive to strong light, do not expose the cartridge to direct
sunlight or strong light. If it is exposed to strong light, blank spots or black lines may appear
on images. In such cases, stop the printer for a while. However, these problems may still
remain if the drum has been exposed to strong light for an extended period of time.
5) Do not open the photosensitive drum protective shutter by hand nor touch the drum sur-
face. Do not clean the drum.
6) Do not stand the cartridge nor upside down. Always place it so that the label side faces
upward.
7) Do not disassemble the cartridge.
Figure 1-5-2
CHAPTER 1
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