Troubleshooting; Converter Faults; Prime Power; Dc Power Supply Module - Comtech EF Data UT-4500 Series Installation And Operation Manual

UT-4500 Series C- and Ku-Band Up Converters
Appendix B
B.2.2

Troubleshooting

When a fault condition is indicated or a marginal performance tolerance
condition exists, you may use the front panel LEDs and VFD to identify the
specific faults and events:
• The LED status indicators alert you to operating problems.
• 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

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
15 VDC: 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.
14 VDC: 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
15 VDC 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 (+5 VDC): 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 15 VDC Power Supply Module, check for other module faults, and check all
B–3
MN/UT4500.IOM
Revision 3