User Manual

166
User Manual
a. If there isn’t any RF signal at the input, check if the RF cable is
connected at the input port. If it’s connected check the power
coming out from the donor source.
b. Otherwise the temperature range is not within the specified
range, change the temperature range or provide proper air flow.
TMPX
Fig. 5.24: Flow-chart describing the troubleshooting procedure
start
Problem on power supply
Is red
LED ON upon
the TMP?
No
Yes
end
Is green
LED OFF upon
the TMP?
RF level @ input port has
exceeded the threshold.
Check the RF signal.
Yes
Is
TPRN sub-rack
switched on?
Switch on
the sub-rack
Is red
LED ON and
green OFF?
No
Yes
Yes
Check TPRN
backplane
power supply
N
o
Is +12Vdc
provided?
N
o
No
TPRN backplane
is faulty. Return
the TPRN
TMP power supply
section is faulty.
Return the TMP.
No
Is yellow
LED ON upon
the TMP?
No
Yes
Check the RF
input level and
if the RF cable
is connected
Is there
any RF input
level?
No
Yes
Check if the
temperature is
within the
s
p
ecified ran
g
e.