TM 11-7025-221-10
2-19. Display Test Routine - Continued.
Display Test Routine - Continued
Operator action/message displayed
step
4
Press STEP key one time. Check that dot patterns move one character position to right. Repeat
step 3 and then go to step 5.
Repeat steps 3 and 4 six times. This checks all 96 characters on the display.
5
Press CLR key and then, one at a time, press keys "1" thru "9" and "0". Check that following
6
message is displayed.
1234567890
7
Check that message display blanks approximately 30 seconds after step 6 was performed.
Press BACK key and check that message displayed in step 6 reappears.
8
Press CLR key. Check that message display is cleared. Display test is completed.
9
2-20. 5-Minute Audible Alarm Inhibit Routine.
Perform the procedures in a below to activate the 5-minute audible alarm inhibit function. Perform the
procedures in b below to clear (turn-off) the inhibit function before the 5-minute cycle expires. When the
inhibit function is active, the following occurs:
ALARMS BUS indicator is frozen in present state.
PROCESSOR and VCXO indicators remain active during the inhibit cycle. If a fault is detected
that is associated with the PROCESSOR or VCXO indicator, the appropriate indicator lights and
the ALARM horn sounds.
MAJOR and/or MINOR indicators, if lit, are turned off and remain off (inhibited) until inhibit cycle
is completed.
Except for faults associated with PROCESSOR or VCXO, or when an orderwire call is received,
the ALARM horn is inhibited.
Alarms recall routine cannot be performed while the inhibit cycle is active, Also, any existing minor
alarms information is erased when routine is performed.
2-43
