Brother HL-2600CN Service Manual page 225

4.1.7 Interlock Switch (Front) (for Front Cover 2)
1) Remove the set screw (1 pc.) to remove the SW ASSY from the printer.
2) Disconnect the connector.
3) Release the two hooks and remove the interlock switch from the SW base F.
SW base F
Since the interlock switch is an important safety item, after installation confirm that the
switch operates correctly.
Fig.7-17
Hook
Fig.7-18
CAUTION 
VII-13
SW ASSY
Interlock switch