HP 4550 Service Manual - Page 144

Consumable assemblies Note The user replaces consumable assemblies as part of periodic maintenance. Chapter 4 explains the maintenance procedures. The printer tracks the amount of use on some of its user-replaceable parts by keeping a page count. Swapping consumable assemblies between printers might cause a misrepresentation of consumable assembly life values and is not recommended. Table 6-2 Approximate replacement interval for consumable items Consumable Printer message Black (K) toner TONER K LOW or cartridge TONER K OUT Cyan (C) toner TONER C LOW or cartridge TONER C OUT Magenta (M) TONER M LOW or toner cartridge TONER M OUT Yellow (Y) toner TONER Y LOW or cartridge TONER Y OUT Drum kit 4500: DRUM KIT LOW or DRUM KIT OUT REPLACE DRUM KIT 4550: DRUM KIT LOW ORDER DRUM KIT Page count 9,000 pages 2 Approximate time period1 4.5 months To install See page 86. 6,000 pages 2 3 months 6,000 pages 2 3 months 6,000 pages 2 3 months See page 86. See page 86. See page 86. 25,000 black and white only pages, or 6,250 color pages 12.5 months for black and white only pages, or 3 months for color pages See page 88. DRUM KIT OUT REPLACE DRUM KIT Transfer kit 4500: TRANSFER KIT LOW or TRANSFER KIT OUT REPLACE KIT 4550: TRANSFER KIT LOW ORDER TRANSFER KIT 100,000 black and white only pages, or 25,000 color pages 50 months for black and white only pages, or 12.5 months for color pages See page 89. TRANSFER KIT OUT REPLACE KIT Fuser kit 4500: FUSER KIT LOW or FUSER KIT OUT REPLACE KIT 4550: FUSER KIT LOW ORDER FUSER KIT 100,000 black and white only pages, or 50,000 color pages 50 months for black and white only pages, or 25 months for color pages See page 92. FUSER KIT OUT REPLACE KIT 1. Approximate lives are based on 2,000 pages per month. 2. The approximate average A4/letter-size page count is based on 5 percent coverage of individual toner colors. Page counts are only estimations; usage conditions and print patterns can cause results to vary. 142 Removal and replacement C7085-90921