Network Control Module 300 Series Technical Bulletin 88
Appendix B: NCM Maintenance
Introduction
We recommend regular maintenance to help keep older NCMs from
failing. Mission critical NCMs need the most attention. This section
contains simple flowcharts, maintenance check procedures, and
troubleshooting information to assist you in keeping NCMs running at
peak performance.
NCM Maintenance Flowcharts
Use the following flowcharts as guidelines for NCM maintenance.
Any Mission
Cricital NCMs
No
Done
Time for NCM
Maintenance
Yes
No
NCM Field
Inspection?
Yes
A
NCM Power
Fail Test?
B
Yes
No
1
NCM
Diagnostics
Defined
2 No
Yes
C
Yes
Done
No
Start
Figure 33: General NCM Maintenance Flowchart
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