EXFO FG-750 - Manual (Page 275)

Maintenance
Fiber Guardian 261
Replacing the OTDR
10. Pair the power leads with the appropriate power terminal (located at
the back of the unit), respecting the polarity.
11. Tighten the screws to attach the power leads to the unit.
12. Turn on the disconnect device that is connected to the new power
supply module.
Replacing the OTDR
You may need to replace the OTDR for maintenance purposes.
To replace the OTDR:
1. If you are using a fiber management tray, remove the protective
window. For more information, see Working with the Fiber (Patchcord)
Management Tray on page 36.
2. Turn off the unit and disconnect it completely from the power sources
(turn off both disconnect devices).
3. Put on an antistatic strap and connect it to the connector provided for
that purpose on the front panel of the unit.
W
ARNING
To avoid serious injuries as well as irreparable damages to your unit,
ALWAYS TURN OFF BOTH DISCONNECT DEVICES BEFORE OPENING
OR SERVICING THE UNIT.
C
AUTION
To avoid damaging your unit or its components, you should wear
an antistatic band during this maintenance operation. For more
information, see Preventing Electrostatic Discharge Damage on
page 23.