Xerox 4400DT - Phaser B/W Laser Printer, Service Manual, Page: 8 / 503

Phaser 4400 Laser Printer Service Manual vii
Service Safety Summary
General Guidelines
For qualified service personnel only: Refer also to the preceding Power Safety
Precautions.
Avoid servicing alone: Do not perform internal service or adjustment of this product
unless another person capable of rendering first aid or resuscitation is present.
Use care when servicing with power: Dangerous voltages may exist at several
points in this product. To avoid personal injury, do not touch exposed connections and
components while power is on. Disconnect power before removing the power supply
shield or replacing components.
Do not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces and other
metallic objects could come into contact with dangerous voltages and currents.
Power source: This product is intended to operate from a power source that will not
apply more then 264 volts rms for a 220 volt AC outlet or 140 volts rms for a 110 volt
AC outlet between the supply conductors or between either supply conductor and
ground. A protective ground connection by way of the grounding conductor in the
power cord is essential for safe operation.
Warning Labels
Read and obey all posted warning labels. Throughout the printer, warning labels are
displayed on potentially dangerous components. As you service the printer, check to
make certain that all warning labels remain in place.
Safety Interlocks
Make sure covers and panel are in place and that all interlock switches are functioning
correctly after you have completed a printer service call. If you bypass an interlock
switch during a service call, use extreme caution when working on or around the
printer.
CLASS 1 LASER PRODUCT
The Phaser 4400 laser printer is certified to comply with Laser Product Performance
Standards set by the U.S. Department of Health and Human Services as a Class 1
Laser Product. This means that this is a class of laser product that does not emit
hazardous laser radiation; this is possible only because the laser beam is totally
enclosed during all modes of customer operation. When servicing the printer or laser
unit, follow the procedures specified in this manual and there will be no hazards from
the laser.