Laser Beams - Oki B930 Service Manual

Occasionally procedures not covered by this manual may be required in actual operation, which

Laser Beams

This laser printer has a switch (INTERLOCK S/W 5V) which removes power to the laser beam
output circuit, preventing operation of the laser beam output unit (ROS ASSY-12). The switch
automatically removes power when the CRU is removed.
Do not turn the switch ON except for normal operation to prevent laser emissions during mainte-
nance.
NOTE Laser beams have the following characteristics:
•Frequencies are smaller in width than other beams (sun and electric bulbs) and
phases are uniform so that high monochromatic and convergence performance
can be obtained and thin beams of light can reach places at a long distance.
•Due to the high convergence, beams are concentrated in high density and high
temperature, which is dangerous to human body.
Reference: Laser beams of this laser printer are invisible rays which you cannot see.
ROS ASSY-12
•If your eyes are exposed to laser beams, you may lose your eyesight.
•Never open any cover if warning label for laser beams is attached there.
•Before disassembling and reassembling this laser printer, be sure to turn it OFF.
•When servicing this laser printer while it is running, be sure to follow the
procedures specified in this manual.
•You should understand the laser beam is capable of causing injury to the human
body, including anyone in the general area.
Caution label
1-2