EXFO OTH-7000, User Manual

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Optical Test Head
51
5 Troubleshooting
Solving Common Problems
Before calling EXFO’s technical support, you may want to consider the
following solutions to problems that could occur.
Problem Possible Cause Solution
My unit does not start.
Its power LED (
)
remains off when I press the
on/off button.
There is a problem related
to electrical power.
³
If your unit is connected
to DC power, make sure
that the disconnect
device is turned on.
If your unit is connected
to AC power, make sure
that the external power
supply is connected at
both ends, and that the
disconnect device is
turned on.
³
If the unit is connected
to DC power, ensure
that the wires are
connected properly,
respecting polarity
(see Connecting Your
Unit to a Power Source
on page 24).
The RTUe-9120 external
switch that I have just
connected is not working.
The switch has not been
detected.
Disconnect, then reconnect
the switch.
Ensure that the OTH-7000
unit is on and that its System
LED ( ) is green and
not blinking.