HP LaserJet 4v/mv HP LaserJet 4V and 4MV Printer - User’s Guide, C314 - Page 143
Safety Information
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WARNING Safety Information Laser Safety The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This printer is certified as a "Class 1" laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. Since radiation emitted inside this printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of normal user operation. Never operate or service the printer with the protective cover removed from the Laser/Scanner Assembly. The reflected beam, although invisible, can damage your eyes. Ozone Emission The HP LaserJet 4V and HP LaserJet 4MV printers do not use high voltage corona wires in the electrophotographic process, and therefore generate no measurable ozone gas (O3). These printers instead use charging rollers in the toner cartridge and in the print engine. B-4 Environmental Specifications