Phaser 4400 Laser Printer Service Manual viiService Safety SummaryGeneral GuidelinesFor qualified service personnel only: Refer also to the preceding Power SafetyPrecautions.Avoid servicing alone: Do not perform internal service or adjustment of this productunless another person capable of rendering first aid or resuscitation is present.Use care when servicing with power: Dangerous voltages may exist at severalpoints in this product. To avoid personal injury, do not touch exposed connections andcomponents while power is on. Disconnect power before removing the power supplyshield or replacing components.Do not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces and othermetallic objects could come into contact with dangerous voltages and currents.Power source: This product is intended to operate from a power source that will notapply more then 264 volts rms for a 220 volt AC outlet or 140 volts rms for a 110 voltAC outlet between the supply conductors or between either supply conductor andground. A protective ground connection by way of the grounding conductor in thepower cord is essential for safe operation.Warning LabelsRead and obey all posted warning labels. Throughout the printer, warning labels aredisplayed on potentially dangerous components. As you service the printer, check tomake certain that all warning labels remain in place.Safety InterlocksMake sure covers and panel are in place and that all interlock switches are functioningcorrectly after you have completed a printer service call. If you bypass an interlockswitch during a service call, use extreme caution when working on or around theprinter.CLASS 1 LASER PRODUCTThe Phaser 4400 laser printer is certified to comply with Laser Product PerformanceStandards set by the U.S. Department of Health and Human Services as a Class 1Laser Product. This means that this is a class of laser product that does not emithazardous laser radiation; this is possible only because the laser beam is totallyenclosed during all modes of customer operation. When servicing the printer or laserunit, follow the procedures specified in this manual and there will be no hazards fromthe laser.
