User's Guide

DRAFT
Page 4-8
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
2. Troubleshooting and Fault Isolation
This section provides troubleshooting procedures for A781-500 systems.
Troubleshooting procedures require data obtained using the TCP. For specific instructions on how to access
and use the TCP, refer to "Operating the MCDU" on page 2-2.
NOTE:
All of the TCP menus discussed in this section are accessed from the SATCOM BITE menu.
A. Subsystem Health
The SATCOM SUBSY HLTH menu provides the BITE status of subsystem components.
To check the subsystem health, on the SATCOM BITE menu, press the button next to SUBSY
HLTH.
Figure 4-2 illustrates the SATCOM SUBSY HLTH menu.
Figure 4-2. SATCOM Subsystem Health Menu
Table 4-10 describes the information available on the SATCOM SUBSY HLTH menu.
Table 4-9 Post Test Procedure
Step Action
1.0 Save the log file of the test results (or 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
setup).
1 5 10 15 20 24
1

SA TCOM SUBSY HL
T
H
LNA
1L
3
OK
3
1R
ANT
2L
5
OK
5
2R
CONF I G PAR I TY
3L
7
OK
7
3R
4L
9
<RETURN
9
4R
DRAFT as of
4 Mar 2016