Is it safe to disassemble the laser scanner unit on the MF1538C?
No, you must never disassemble the laser scanner unit. Although the machine is classified as a Class 1 laser product overall, the laser scanner unit contains a Class 3B laser beam source that can cause eye injuries. No adjustment can be made to the laser scanner unit in the field. (Page 13)
From the official Canon imageCLASS MF1538C Multifunction Laser Printer manual, page 13
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