How do I safely handle the laser scanner unit?
The laser scanner unit must never be disassembled, as it contains a Class 3B laser beam source that can cause eye injuries. No adjustments can be made to the laser scanner unit in the field. The machine is classified as a Class 1 laser product during normal use, making it safe for users.
From the official Canon LBP1238 Ii Printer manual, page 2
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