Samsung SCX-6555N-XBG - Manual (Page 86)

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10. Slide the toner cartridge in until it locks in place.
11. Turn the cartridge locking lever toward the left until you hear a 'click'.
12. Close the front cover, then the side cover.
MAINTENANCE PARTS
To avoid print quality and paper feed problems resulting from worn parts
and to maintain your machine in top working condition the following items
will need to be replaced after the specified number of pages or when the life
span of each item has expired.
We highly recommend that this maintenance be performed by an authorized
service provider, dealer or the retailer where you bought the machine. The
warranty does not cover the replacement of the maintenance parts after
their lifespan.
After replacing the toner cartridge, wait for several minutes without
powering off until the machine enters to standby mode. Otherwise it
may cause malfunction of the machine.
ITEMS YIELD (AVERAGE)
DADF rubber pad Approx. 50,000 pages
Multi-purpose tray rubber pad Approx. 50,000 pages
DADF feed roller Approx. 250,000 pages
Multi-purpose tray feed roller Approx. 200,000 pages
Transfer roller Approx. 125,000 pages
Fuser unit Approx. 250,000 pages
Paper Feed roller Approx. 250,000 pages