User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-200 SDU and SCM
23-15-30 4-6
DATE TBD
Refer to the Outline and Installation diagrams (Figure 3-1 to Figure 3-6) and the
Interconnection and Contact Assignment drawings (Figure 3-7 to Figure 3-9) for additional
information.
(1) Test Setup Procedure
The test setup procedure is presented in Table 4-6.
Table 4-6 Test Setup Procedure
Step Action
1.0 Make sure that the SDU is p
o
wered down and disconnected from the power source.
2.0 Remove the maintenance-port connector cover.
3.0 Connect a maintenance cable to the SDU front-
panel maintenance port connector.
4.0 Connect the other end of the cable to the serial port of the computer.
5.0 Open a log file to capture all test data. A log fi
le is a text capture of the ASCII traffic
between the computer attached to the maintenance port and the SDU.
(2) Post Test
When testing is completed, follow
the steps in Table 4-7.
Table 4-7 Post Test Procedure
Step Action
1.0 Save the log file of the test results (o
r data) for future reference.
2.0 Remove power from the SDU that was tested
and from all other test equipment.
3.0 Disconnect test equipment from the SDU.
4.0 Replace the maintenance-port connector cover (if it was removed during the test
setu
p).
If the Unit Under Test (UUT) PA
SSED the test, the unit is ready for service.
If the UUT FAI
LED the test, return the UUT along with a hardcopy printout of the recorded
(captured) log file of the test results to the manufacturer for service and repair. Indicate
the date of the test and the serial number of the UUT on the test documentation.
(3) Installation and Operational Verification Tests
To verify that the A781-200 system is ready for op
eration, use the following
procedures:
• Power-On Test
• BITE
(a) Power-On Test
To complete the power-on test, follow the step
s in Table 4-8.