SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
MCS--4200/7200 Multi--Channel SATCOM System
23--20--35
15 Jul 2006
Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6--12
Table 6-4.
SDU Indicators/Controls
Indicator/Control
Description
SDU TEST
Push this button to initiate a system--wide SATCOM test
SYSTEM STATUS DISPLAY
Shows data defining the SATCOM system configuration and the
identification of all SATCOM components that are not operating as required
MANUAL SCROLL
Push this button to scroll through the messages on the system status
display
(c) Front Panel Alphanumeric Display and MANUAL SCROLL Button
1
General
a
The alphanumeric display makes it easy for the maintenance personnel
to identify which system LRU has failed. The alphanumeric display is
blank unless specifically activated for temporary display of failure
messages and other status information. The alphanumeric display is
also kept blank under conditions of extreme temperatures. The display
is not intended to be started when its temperature is less than --5
°
C, or
greater than +30
°
C. The alphanumeric display is started during the LED
test portion of the functional test sequence. After the functional test
delay period, and any time during continuous monitoring, the
alphanumeric display can be started by pushing the MANUAL SCROLL
button.
b
The operator can scroll the alphanumeric display through the entire
applicable message sequence by repeatedly pushing the MANUAL
SCROLL button within 30
5 seconds after the display is started. One
left-justified 20-character (or less) message is displayed each time the
MANUAL SCROLL button is pushed. When the end of the display
sequence is reached (i.e., END OF LIST), the next actuation of the
MANUAL SCROLL button returns the alphanumeric display to the top of
the display sequence, enabling the operator to scroll through the
sequence again. Message scrolling is performed according to the
following sequence:
•
One of four possible system/SDU pass/fail messages
•
All applicable Level I failure messages
•
LRU part number messages (up to four lines)
•
ORT identification message
•
END OF LIST message.
c
If the MANUAL SCROLL button is inactivate for 30
±
5 seconds at any
point during the display sequence, the alphanumeric display is blanked
and any display sequence in progress is aborted. At the same time, one
or both of the front panel LEDs (as appropriate) are turned off if they
were exclusively indicating functional test failures with no current CM
failures.
