User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 4-74
3 JUN 10
• Voice/data calls—in flight:
Place any combination of voice and/or data calls during flight. The flight
pattern may include "standard rate of turn," figure 8, or circles. Note any
voice or data anomalies.
2. Troubleshooting and Fault Isolation
This section provides troubleshooting procedures for HSD-440 Mark 2 Terminals experiencing
faults during the commissioning process or previously operational terminals now considered as
not working.
Troubleshooting procedures require data obtained using the MPU of the HSD-440 Mark 2
Terminals. For specific instructions on how to access and use the maintenance port and MPU,
refer to
"Connection Requirements" on page 4-37.
A. Troubleshooting Practices
Troubleshooting practices for the HSD-440 Mark 2 Terminal fall into two categories:
non-specific and specific complaints.
(1) Non-specific Complaints
When troubleshooting terminals with non-specific complaints, complete all system
verification and functional tests starting on page
4–60. Document whether the
terminal passes or fails each test.
If the terminal passes all tests and no fault is discovered, all associated equipment
and aircraft wiring should be tested.
If the terminal fails a specific test, isolate the actual fault or faults by performing the
troubleshooting procedures provided in this section.
(2) Specific Complaints
When troubleshooting terminals with specific complaints, you can proceed directly
to the applicable troubleshooting and fault isolation procedure provided in this
section.
B. Equipment Required
The equipment required for troubleshooting and fault isolation is the same as the
equipment required for test purposes, as listed in
"Test and Fault Isolation Equipment
Requirements" on page 4-35.
C. Troubleshooting Aids
This section presents examples of maintenance screens and troubleshooting tables to
assist in troubleshooting and fault isolation activities. The exact screen display may vary
depending on the version of the terminal's operational software and installation
configuration mode.
NOTE: The screens used in the figures presented in this section may have been edited
for clarity and illustrative purposes.