Brother HL-2600CN Service Manual page 269

3) Remove the set screws F3X10 (4 pcs.) from the optical unit 2.
4) Disconnect the harness connector (1 pc.) to remove the optical unit 2 from the printer.
Optical unit 2
N
There is a class IIIb laser within the optical unit 2. Do not attempt to disassemble the
laser.
N
The optical unit 2 is replaced as a complete unit. No adjustment is required to the
replacement optical unit 2.
N
Confirm that all the covers have been correctly installed prior to any test run or
operation in order to prevent any laser radiation escaping from the printer.
Fig.7-80
WARNING
VII-57