TM 11-7025-221-20
2-15. Additional Troubleshooting Procedures.
Use the information in the following chart when directed to do so by another paragraph. This information
will be used when one of the following conditions exist:
When all of the cards for an alarm number have been replaced and the fault still exists.
q
When "DEMUX" is next card listed as replacement for alarm number being used in troubleshooting.
q
. There is no reference designator listed after alarm number being used.
a. Description of Additionsl Troubleshooting Chart. All the alarm numbers, associated data, and ap-
plicable additional troubleshooting data are listed under the columns described below.
(1) "Alarm No." Column. This column lists all the alarm numbers, in numerical order, that can be
displayed.
(2) "Message" Column. This column lists all the data that are displayed with each alarm number.
If "Not used" appears, this is an inactive alarm.
(3) "Additional Troubleshooting" Column. Additional troubleshooting actions that can be performed for
an alarm number appear in this column.
b.
Use of Additions/ Troubleshooting Chart. Use the data in the chart by performing the following
steps:
(1) Go to alarm number listed in "Alarm No." column.
(2) Ensure that you have replaced each card listed in the "Message" column for the given alarm
number. If "'DEMUX" is listed, refer to "Additional Troubleshooting" column to determine demux
card to be replaced.
(3) Replace any cards listed in "Additional Troubleshooting" column. If fault still exists, report problem
to next higher level of maintenance.
Additional Troubleshooting Chat
Display
Additional Troubleshooting
Alarm No.
Message
BUS
01
02
A23A1
03
A9
04
A7
05
A4
06
A2
07
A6
08
A6
09
A22
10
A5
11
LOS1 A3 A7
A 2 0 A6, A5
12
LOS1
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