TM 55-1930-209-14&P-11
Table 4-1. Troubleshooting Procedures (continued)
Problem
Possible Cause
Suggested Action
2.
Video monitor does
a.
Switch behind panel off
a.
Turn switch ON
not come on
b.
5A fuse on main processor
b.
Replace fuse (paragraph 4-6.3.1)
door blown
c
1 A and/or 3A fuse(s) on
c.
Replace fuse(s) (paragraph
video monitor blown
4-8.3)
d.
Monitor malfunctioning
d.
Test and repair or replace (para-
graph 4-7)
3.
Keys do not light
a
Bulb(s) burned out
a.
Replace bulb(s) (paragraph
up on keyboard
4-7.3.3)
lamp test
b.
3A fuse inside keyboard
b.
Replace fuse (paragraph
unit
4-7.3.1)
c.
Keyboard malfunctioning
c.
Replace circuit board (paragraph
4-7.3.2) or test and repair or
replace (4-7)
4.
EMS will not respond
Coaxial cable improperly
Inside main processor door panel,
to keyboard
connected
disconnect black coaxial cable
commands
from right hand connection and
connect to left.
5.
Keyboard alarm
a.
Alarm relay module not
a.
Close (ON) 4P14 circuit breakers
sounds but external
energized
on 24 Vdc power panel
horn and strobe light
in ROWPU space and
buzzer in dayroom
not activated by
alarm relay module
b
1 OA fuse(s) Inside alarm
b.
Replace fuse(s) (paragraph
relay module blown
4-9.3)
c.
Alarm relay module horn,
c.
Test and repair or replace
strobe light, or buzzer
alarm relay module (para-
malfunctioning
graph 4-9), horn (para-
graph 4-12), strobe light
(paragraph 4-13), or
buzzer
6.
Keyboard alarms
a.
Blidge alarm module not
a.
Close (ON) 1 P14 circuit breaker
sound, but horn
energized
on 24 Vdc power panel
and strobe light on
top of deckhouse
mast
b
1 OA fuse(s) inside alarm
b.
Replace fuse(s) (paragraph
relay blown
4-10.3)
4-2
