MaintenanceWorkCentre 7425/7428/7435User Guide152Maintenance and CleaningThis section includes:• General Precautions on page 152• Locating the Serial Number on page 153• Usage Counters on page 153• Cleaning the Printer on page 154• Replacing the Toner Cartridges on page 159• Replacing the Waste Toner Container on page 161• Replacing the Drum Cartridges on page 164• Replacing the Fuser Assembly on page 168• Replacing the Transfer Belt Cleaner on page 170• Replacing the Transfer Roller on page 173• Emptying the Hole Punch Waste Container on page 176• Installing Staples on page 179See also: Safety on page 11.General PrecautionsWarning: When cleaning your printer do NOT use organic or strong chemical solvents or aerosolcleaners. Do NOT pour fluids directly into any area. Use supplies and cleaning materials onlydirected in this documentation. Keep all cleaning materials out of the reach of children.Warning: Do NOT use pressurized air-spray cleaning aids on or in the printer. Some pressurized air-spray containers contain explosive mixtures and are not suitable for use in electrical applications.Use of such cleaners can result in a risk of explosion and fire.Caution: Do NOT remove the covers or guards that are fastened with screws. You cannot maintainor service any parts that are behind these covers and guards. Do NOT attempt any maintenanceprocedure that is NOT specifically described in the documentation supplied with your printer.To avoid damaging the printer, keep the following guidelines in mind:• Do not place anything on top of the printer.• Do not leave the covers and doors open for any length of time, especially in well-lit places. Lightexposure can damage the imaging units.• Do not open covers and doors during printing.• Do not tilt the printer while in use.• Do not touch the electrical contacts, gears, or laser devices. Doing so may damage the printer andcause the print quality to deteriorate.• Make sure any parts removed during cleaning are replaced before you plug in the printer.
