Canon CLBP-460PS, Service Manual

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b. Cartridge validity period
The validity of a cartridge is two and a half years from the date of manufacture (printed on the
cartridge in an abbreviated form). The expiry date (date of manufacture plus two and a half
years) is given on the cartridge box and the shipping box. A cartridge used after the expiry date
will produce prints of reduced quality, so cartridges should be used within their validity period.
c. Handling suggestions
1) Before installing a new toner cartridge in the printer or if blank spots appear on prints dur-
ing use, because of uneven toner distribution, hold the cartridge horizontally and slowly rock
it 45 degrees each way about the drum axis, five or six times, as shown in Fig.1-5-18. This
will distribute the toner evenly. Then install the cartridge in the printer. Shaking it any
other way may result in toner leaking from the developing cylinder.
Fig. 1-5-18
After installing a new cartridge, print three to five test patterns to check for toner leakage.
2) Before transporting the printer, take all the cartridges and ITB unit out, and put them into
protection bags to prevent exposure to light.
3) Keep the cartridges and ITB unit away from CRT screens, disk drives, and floppy disks. The
magnet in the Bk cartridge can corrupt the data in the memory of your computer or the data
on disks.
4) Do not expose the drum cartridge to direct sunlight or strong light, as it may give an adverse
effect to print image.
5) Do not touch the surface of the photosensitive drum.
6) Do not turn a cartridge in an upright position or turn it upside down. Always lay it down
with its label on the top.
7) Never attempt to disassemble cartridges or ITB unit.
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CHAPTER 1