Phaser® 3500 Laser Printer Service Manual
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Service Safety Summary
General Guidelines
Note: The material presented here is intended as a safety reminder for qualified service 
personnel. 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. Warning labels are displayed on potentially dangerous printer 
components. As you service the printer, check to make certain that all warning labels remain in place. 
Safety Interlocks
Make sure all covers and the printer’s control panel are in place and 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 3500 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. The laser is not hazardous during servicing if you follow the procedures 
specified in the manual.