YOUR PROBLEM IS IN THE LASER ASSY. FIRST GUESS IS THE POLYGON MIRROR MOTOR.IS SLOWING DOWN AND NEEDS REPLACING.USUALLYYOU CAN HEAR A WHINING NOISE AS THE MOTOR REVS UP APPROX.30000RPMS. SC320 DOES NOT MEAN THE SAME THING FOR EACH MODEL BUT IT DOES MEAN A PROBLEM IN THE LASER UNIT
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YOUR PROBLEM IS IN THE LASER ASSY. FIRST GUESS IS THE POLYGON MIRROR MOTOR.IS SLOWING DOWN AND NEEDS REPLACING.USUALLYYOU CAN HEAR A WHINING NOISE AS
THE MOTOR REVS UP APPROX.30000RPMS. SC320 DOES NOT MEAN THE SAME THING FOR EACH MODEL BUT IT DOES MEAN A PROBLEM IN THE LASER UNIT