733. MaintenanceAvailable maintenance partsTo purchase maintenance parts, contact the source where you bought the machine. Replacing maintenance parts can be performed only by an authorized serviceprovider, dealer, or the retailer where you bought the machine. The warranty does not cover the replacement of any maintenance parts once it has reached its“Average yield”.Maintenance parts are replaced at specific intervals to avoid print quality and paper feed problems resulting from worn parts, see table below. The purpose of whichis to maintain your machine in top working condition. The maintenance parts below should be replaced when the life span of each item has been met.Parts Average yield aa. It will be affected by the operating system used, computing performance, application software, connecting method, media, media size and jobcomplexity.Document feeder rubber pad Approx. 20,000 pagesTransfer roller Approx. 100,000 pagesFuser unit Approx. 50,000 pagesPickup roller Approx. 50,000 pagesRetard roller Approx. 50,000 pagesForward Roller Approx. 50,000 pagesFeed Roller Approx. 50,000 pages
