User Manual

13
7
MN024-08
TFLN
Fig. 5.15 (b): Flow-chart describing the fibre optic UL troubleshooting
start
Is there any small
radius of curvature
of the fibre?
Rearrange the optical path in order to
avoid sharp bends. If necessary
replace the optical cable with a
lon
g
er one.
Is the red LED
upon TFLN still
ON?
Are SC-APC
connectors properly
installed at both fibre
ends?
Fix SC-APC connectors
properly to adapters.
Yes
N
o
N
o
Y
es
No
Y
es
N
o
Y
es
Disconnect the optical SC-APC
connector from TFLN UL port.
Clean the optical SC-APC
p
orts both on TFLN and
TFAx side.
Disconnect the optical fibre
and clean it at both ends.
Re-connect the
fibre to relevant
p
orts.
Measure the output power
at the corresponding fibre
end
Measure the input power entering
the fibre.
Go to the
TFAx
side
Disconnect the optical
SC-APC connector
from TFAx UL
p
ort.
Calculate the UL fibre attenuation:
A
UL
[dB]=input power - output power
Is A
UL
> 4dB?
Fibre optic cable has some problems.
Replace it.
The TFAx remote unit should be faulty. Before
replacing it, verify its status through supervision
system and contact for assistance.
end
No
Y
es
No
Y
es
Is the red LED
upon TFLN still
ON?
Is the red LED
upon TFLN still
ON?