DT-4500 Series C- and Ku-Band Down Converters
MN/DT4500.IOM
Appendix B
Revision 2
B–3
•
You may use the VFD to view stored events and faults. See
Sect. 6.2.5
(SELECT:) FAULTS Menu Branch
for information about viewing and
managing the stored events log.
•
See
Sect. 6.2.4 (SELECT:)MONITOR Menu Branch
for information about
viewing the unit’s operational status screens.
B.2.3
Down Converter Faults
B.2.3.1
Prime Power
Check the dual fuses on the rear panel. The required prime power is 90-250VAC
@ 1 Amp. The optional DC prime power is -48VDC.
B.2.3.2
DC Power Supply Module
15VDC:
A fault ("FT") indicates a voltage level exceeding
±
10% of the power
supply voltage. Check the output of the DC Power Supply Module. The typical
current output level is 3.0 amps. Check all connections to make sure they are
secure. If the voltage exceeds ± 10%, or the power supply module current is not
approximately 3.0 amps, or the fault still exists, remove the power supply and
return it to Comtech EF Data for repair.
14VDC:
A fault ("FT") indicates a voltage level exceeding ± 10% of the power
supply voltage. The 14VDC is developed in the modules. Check the output of the
15VDC Power Supply Module, check for other module faults, and check all
connections. If the fault still exists, remove the converter and return it to
Comtech EF Data for repair.
VCC (+5VDC):
A fault ("FT") indicates a voltage level exceeding ± 10% of the
power supply voltage. The 5VDC is developed in the modules. Check the output
of the 15VDC Power Supply Module, check for other module faults, and check all
connections. If the fault still exists, remove the converter and return it to
Comtech EF Data for repair.
