Product specifications

UT4500 Series Up Converter MN/UT4500.IOM

Maintenance and Troubleshooting Revision 2

7.2.2 TROUBLESHOOTING

Converter operating problems can be identified by first observing the status indicators on

the front panel. When a fault condition is indicated, the specific fault, or faults, can be

identified in the Figure 18, which is accessed through the local operation keypad and

displayed on the LCD display located on the front panel. The status of converter

functions is displayed in the Figure 17. Refer to Paragraph 3.3, Operation, for a

description of the converter command functions.

7.2.3 CONVERTER FAULTS

Check the Monitor Status Functions Menu for possible faults, or an indication of a

marginal performance tolerance condition.

7.2.3.1 PRIME POWER

Check the dual fuses on the rear panel. The required prime power is 100 to 125 Vac, or

205 to 240 Vac, at 1 amp. The optional DC prime power is -48 Vdc.

7.2.3.2 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 14 Vdc 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 5 Vdc 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.