Spares; Redundancy Systems - Converter Management; Remove A Faulted Converter; Install A Replacement Converter - Comtech EF Data DT-4572 Installation And Operation Manual

DT-4572 X-Band Down Converter
Appendix B

B.3 Spares

Comtech EF Data recommends that you have spare replacement converters on
hand at the RF converter level to replace any converter(s) removed from the
system for any reason.
If sparing at a lower level is desired, contact Comtech EF Data Product Support
for the correct spares for your particular converter.
B.4 Redundancy Systems – Converter Management
B.4.1

Remove a Faulted Converter

To remove a faulted "inline" converter for repair, do these steps:
1. Force a backup of the faulted unit.
2. Turn OFF the power to the faulted unit at the rear panel power switch
and disconnect the power cord. (DO NOT disconnect the RF and IF cables
from the Receive Switch Module (RSM).)
3. Unscrew the faulted unit RSM thumbscrews. Then, remove the rack
mounting screws at the front panel of the faulted unit.
4. From the rear of the faulted unit, hold the RSM, and push the chassis
towards the front of the rack until the module fully detaches from the
unit. Leave the RSM "dangle" by its connected cables.
5. Remove the faulted unit from the front of the rack.
To remove a faulted "backup" converter for repair, do these steps:
1. Turn OFF the power to the faulted BU at its rear panel power switch.
2. Remove the power cord from the faulted BU.
3. Disconnect the RF and IF cables from the faulted BU's IOM.
4. Remove the rack mounting screws at the front panel of the faulted BU.
5. Remove the faulted BU from the front of the rack.
B.4.2

Install a Replacement Converter

To install a replacement converter into your redundancy system, do these steps:
1. With the replacement unit on the bench, turn ON the unit power.
2. Configure the new unit for the correct redundancy settings:
a. Set Redundant Mode = ON;
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MN/DT4572.IOM
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