TM 11-7025-221-20
2-14. How to Use Alarms Recall Data.
When you are directed by the TD-1337(V)/G troubleshooting procedures in paragraph 2-9 to "Replace Card(s)
Recorded During Alarms Recall", follow the instructions in a below. When you are directed by the trouble-
shooting procedures to check out a recurring ALARMS MINOR indication, use the troubleshooting procedures
in b below.
a. Troubleshooting Based on ALARMS MAJOR Problems. Use the instructions in the flowchart on
the facing page. You will find the faulty card faster and with less confusion if you follow these instructions.
Flowchart hi-lights are listed below.
If there are multiple fault conditions, you could have data displayed under both TSSP MAJOR NEW
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and TSSP MAJOR OLD headings. In this case, merge the recalled data into one list, in alarm
number sequence. Each time power is turned off and back on, data recorded under TSSP MAJOR
OLD headings will appear under TSSP MAJOR NEW headings. Conversely, performing a second
alarms recall routine, without turning power off, will cause data originally appearing under TSSP
MAJOR NEW headings to be displayed under a TSSP MAJOR OLD heading.
If two or more alarm numbers (lines of data) are recorded, start with the lowest alarm number.
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When two or more alarm numbers are recorded, it is very likely that multiple fault conditions exist.
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In this case, you could replace a card that corrected the first fault, but the ALARMS MAJOR
indicator would still be lit due to the second fault. It now becomes necessary to perform an alarms
recall routine after each card replacement to determine if the original alarm number is still displayed
(first fault corrected or not corrected).
Replace the cards, one-at-a-time, in the order listed for a given alarm number. If "DEMUX" is
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included in the listing, it means replace a demux card. Refer to paragraph 2-15 to determine demux
card (Al 6 through Al 9) to be replaced.
If an alarm number does not have a reference designator displayed, go to paragraph 2-15.
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If all cards associated with an alarm number have been replaced and the problem still exists,
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go to paragraph 2-15.
b. Troubleshooting Based On Repeating TSSP MINOR Problems. A faulty condition is indicated when
the same alarm number is repeated under the TSSP MINOR heading. Depending on the operating system
configuration, the alarm number could repeat in minutes or it could repeat several days apart. When the
same alarm number is repeated, perform the troubleshooting procedures as directed in a above; with the
following exceptions.
Ignore block in flowchart that merges TSSP MAJOR NEW and TSSP MAJOR OLD headings into
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one listing. There is only one TSSP MINOR heading.
When a card is replaced, observe that ALARMS MINOR indicator is not lit instead of ALARMS
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MAJOR indicator.
When a card is replaced, wait a given amount of time for ALARMS MINOR indicator to light.
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Waiting time should be same as that noted when it was determined that same alarm number
is repeating.
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