Ricoh SP 310DN, Service Manual, Page: 50 / 184

Laser Unit
M154/M155/M174/M175/A0A7/M287/M0BB 4-12 SM
4.4 LASER UNIT

Turn off the main power switch and unplug the machine before attempting any of the
procedures in this section. Laser beams can seriously damage your eyes.
4.4.1 CAUTION DECAL LOCATIONS
A caution decal is attached as shown below.

Be sure to turn off the main switch and disconnect the power plug from the power outlet
before beginning any disassembly or adjustment of the laser unit. This machine uses a
class IIIB laser beam with a wavelength of 648 to 663 nm and an output of 9 mW. The
laser can cause serious eye injury.