HP Color LaserJet 8500 Service Manual - Page 121

Replacement frequencies Table 27 lists the approximate schedule for replacing consumables and the printer messages that appear when each consumable should be replaced (see page 513 for part numbers). For best print quality output, use HP consumables that have been designed to work together in this printer. For an explanation of printer control panel messages, see page 368. Table 27. Replacement frequencies for printer consumables Consumable Printer message Page count Approximate time period1 Black toner cartridge Color toner cartridges Cyan Magenta Yellow TONER LOW REPLACE BLACK TONER LOW REPLACE [color] 17,000 pages2 8,500 pages2 2.5 months 1.1 to 1.6 months Drum kit Imaging drum Air filters (2) Hand wipe DRUM LIFE LOW REPLACE DRUM KIT 50,000 black-and-white only pages, or 12,500 color pages3 8.3 months for blackand-white only pages, or 2.1 months for color pages Transfer kit Transfer drum Transfer belt Transfer charger Cleaning roller Charcoal filter Hand wipe TRANSFER KIT LOW REPLACE KIT 150,000 black-and-white only pages, or 75,000 color pages 25 months for blackand-white only pages, or 12.5 months for color pages Fuser kit (110 Volt) Fuser Paper rollers (6) Hand wipe FUSER LIFE LOW REPLACE KIT 100,000 pages black-and- 16.7 months for black- white only pages, or and-white only pages, 50,000 color pages or 8.3 months for color pages Fuser kit (220 Volt) Fuser Paper rollers (6) Hand wipe FUSER LIFE LOW REPLACE KIT 100,000 pages black-and- 16.7 months for black- white only pages, or and-white only pages, 50,000 color pages or 8.3 months for color pages 1 Approximate life based on printing 6,000 pages per month. 2 Approximate average letter-size page count based on 5% coverage of individual toner colors. This value can be used to estimate other levels of coverage from 2% to 35%. For example, 5,000 pages at 5% coverage is approximately 2,500 pages at 10% coverage. Estimates made in this manner are only approximate, and usage conditions and print patterns can cause the results to vary. 3 Drum life is stated in terms of letter/A4-size images. The number of images printed for each sheet of media varies, depending on the mix of color, duplexing, and large-format printing. An image is a layer of toner. A letter-size, color (CMYK) sheet printed on one side contains four letter/A4 images. A duplexed sheet (printed on both sides) counts as two images. In color duplex mode, there are eight letter-size images per letter/A4 sheet. An 11-by-17/A3 sheet contains twice as many letter-size images as a lettersize sheet. EN Printer consumables 119