User's Guide

DRAFT
Page 4-6
17 Mar 2016
23-15-87
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
CAUTION: ONLY AUTHORIZED TECHNICAL PERSONNEL WHO ARE TRAINED IN
GENERAL AVIA1.57 TION WORKMANSHIP AND HAVE A BASIC
UNDERSTANDING OF SATCOM SYSTEMS SHOULD PERFORM THE
OPERATIONAL AND DIAGNOSTIC TEST PROCEDURES IN THIS MANUAL.
CAUTION: CHANGES TO DEFAULT VALUES FOR SOME MENU FUNCTIONS MAY
SERIOUSLY DEGRADE SYSTEM OPERATION.
NOTE: This manual describes the basic MPU functions, menus, and reports required for the testing
and fault isolation procedures presented in this section. Consult RC Product Support before
entering any unfamiliar menu selections not described in this manual.
NOTE: Using a terminal emulation program, open a log file and save all test results for future
reference and test records.
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.
(2) Installation and Operational Verification Tests
To verify that the A781-500 system is ready for operation, use the following procedures:
• Power-On Test
•BITE
(a) Power-On Test
To complete the power-on test, follow the steps in Table 4-7.
Table 4-6 Test Setup Procedure
Step Action
1.0 Make sure that the SDU is powered down and disconnected from the power source.
2.0 Using a 3/32 Allen key, remove the maintenance port 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 file is a text capture of the ASCII traffic
between the computer attached to the maintenance port and the SDU.
6.0 Follow the procedures in "Installation and Operational Verification Tests" on page 4-6.
Table 4-7 Power-On Test Procedure
Step Action
1.0 Follow the test setup procedure in Table 4-6 on page 6.
2.0 Power-on the SDU.
DRAFT as of
4 Mar 2016