EXFO FG-750 - Manual (Page 276)

Maintenance
262 FG-750
Replacing the OTDR
4. Turn the unit’s main compartment screws counterclockwise until the
compartment is loose. Since the screws are captive screws, you
cannot remove them completely.
5. Using the screws as handles, gently pull the compartment towards you
to open the unit.
6. Turn the screw of the OTDR’s retaining tab counterclockwise until the
tab is loose. Since the screw is a captive screw, you cannot remove it
completely.
7. Remove the retaining tab to access the OTDR.
Retaining screws/handles to slide the unit in
or out of its case