TM 11-5895-846-14
Table 8-13. Alarm Monitor, Troubleshooting Chart - Continued
Item of Check
Test Conditions
Normal Indications
Remarks
c.
On the UUT, connect one end of
DS7:OFF
If there is an indi-
a test lead to XAI-28 and the
cation, check wiring
other end to ground. Observe
from XA1-28 to J3-B
indicator DS-7 on the test
fixture.
d.
On the UUT, connect the multi-
XA1-12: + 5 V
If no indication, check
meter to XA1-12 (+) and
wiring from XA1-7 to
ground. On the test fixture
momentarily place switch S2 to
the 1 position and return to OFF.
e.
Repeat step d above but for the XA1
pins and test fixture switches, as
S3, XA1-13.
cation check wiring
listed in the Normal indication
S5, XA1-15.
from appropriate XA1
S6, XA1-16
pin to J3 pin.
for a momentary + 5 V indica-
S7, XA1-17.
tion at each pin.
S8, XA1-18.
f.
On the test fixture connect one
end of a test lead to P3-N
and the other end to P3-Y ( + 5 V
dc) set switch S9 to the 1
position.
g.
On the UUT connect the multi-
XA1-19: + 5 V
If no indication, check
meter between XA1-19 and
wiring from X1-19
ground check for + 5 Vdc.
Connect
Measure
SW to
to P3-N.
h.
Remove the test lead from P3-N
P3Y to
1 pos
on the test fixture and multi-
P3-P,
XA1-21
S10
cation, check wiring
meter from XA1-19 on the
P3-R,
XA1-22
S11
from appropriate
UUT and reconnect, respectively
P3-M
XA1-24
S13
XA1 pin to P3 pin.
as listed in the Normal indication
+5V
for + 5 V indication at each
XA1 pin.
i.
Remove power and disconnect UUT
from test setup.
d. On the test fixture check for or perform the
following:
(1) Switch AC PWR is in the OFF position.
Circuit breaker CB1 is in the down (off) position.
(2) Switches S1 through S28 are in the 0
position.
e. On the alarm monitor check for or perform the
following:
(1) The POWER circuit breaker (CB1) is in
the down (off) position.
(2) The AUDIBLE SIGNAL/FAULT switch
(S1) is in the OFF position.
(3) Open the access cover. Fault switches 1
through 12 (S2 through S13) are in the NORMAL (down)
position.
(4) Remove the fault/safety gate module
from chassis connector XA1 approximately one inch.
Note the pin numbers on the module connector. Use
these guides to locate pin numbers on XA1.
f.
8-40