Laser Safety 
The Center for Devices and Radiological Health (CDRH) prohibits the repair of laser-based optical 
units in the field. The optical housing unit can only be repaired in a factory or at a location with the 
requisite equipment. The laser subsystem is replaceable in the field by a qualified Customer 
Engineer. The laser chassis is not repairable in the field. Customer engineers are therefore 
directed to return all chassis and laser subsystems to the factory or service depot when 
replacement of the optical subsystem is required. 
 
  Use of controls, or adjustment, or performance of procedures other than those specified 
in this manual may result in hazardous radiation exposure. 
 
WARNING FOR LASER UNIT 
WARNING: 
Turn off the main switch before attempting any of the procedures in the Laser Unit 
section. Laser beams can seriously damage your eyes. 
CAUTION MARKING: 
 
Safety Precautions for This Machine 
Before moving the mainframe: 
  Disconnect all peripheral units (finisher, LCT, etc.) from the mainframe. 
  Hold the four holders of the mainframe to lift the mainframe. For details, see the “Copier 
Installation” in the field service manual.