HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 168
Printer Exterior, Periodic Cleaning (When Replacing Drum), Reversing Unit Area
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Maintenance Periodic Cleaning (When Replacing Drum) Printer Exterior 1. Check the paper output tray on top of the printer and use the vacuum to remove any paper dust or dirt. 2. Vacuum the area around the ventilation slots on the rear of the printer to remove any dust accumulation. Periodic Cleaning (When Replacing Drum) Perform the following cleaning routine when you replace the drum assembly. Reversing Unit Area 1. Turn the main power switch off, and open the front door. 2. Hold lever 5 to the left to open the reversing unit area. See Figure 5-4. 3. Use the supplied cleaning cloths to wipe up any toner or dust off the reversing unit. Clean all the accessible areas, working toward the back of the printer, to ensure a thorough cleaning. Figure 5-4 Cleaning Reversing area Maintenance 5-5