HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 117

Replacing Toner Replacing Toner The toner comes in a kit that contains bottles of toner, empty toner collector bottles, and fuser cleaning rollers. The toner collector bottle is replaced with every bottle of toner. The fuser cleaning roller is replaced after every two bottles of toner. Note Replace the cleaning roller every other toner replacement. Caution Only add toner when the printer displays a toner low or toner empty message. Never try to add toner before the printer requires it. Never add more than one bottle of toner. Overfilling causes toner spills. When the toner starts to get low, the Control Panel displays: Toner Low Add New Toner A Toner Low condition does not stop the printer. Toner can be added between jobs or during a job by pressing Offline: 1. Press Offline. 2. Open the upper right cover (Figure 4-1) to access the toner hopper and toner collector bottle. Toner collector bottle Toner hopper Upper right cover open Figure 4-1 Opening Upper Right Cover 4-4 Ordering and Replacing Consumables