
MAINTENANCE PHILOSOPHY
recovery program to request a diagnostic program. This
The IXL is structured to provide fast access to those
In general, logic circuit failures cause the fault
method of requesting the diagnostic program includes
the TLP option. The IXL reflects this in the TTY
supplementary messages pertain to problems in generating
a SUSPECTED FAULTY EQUIPMENT list and reference to
procedures (TAPs) which attempt to correct the problem.
If successful in generating a SUSPECTED FAULTY
that are designed to clear equipment problems. All other
problems are sensed by scan points which generate an
PWR OFF lamp lighted
and OFF NORM lamp off) or by reading the REPT:PA printout
which would identify the frame with the power fault. The
The Data Unit Selector (DUS) is not covered in this
frame. The DUS is electrically and functionally a
covered in TOP 234-351-010.
based upon design of equipment (hardware), diagnostic
software and test equipment employed. Procedures are
procedures pertinent to symptoms identified. Power
messages listed. Two supplementary messages,
which is an alternative to the first and most common
trouble-clearing approach.
LEDs on converters and power function circuit packs.
GENERAL
engineering, and software documentation such as I/O
Manuals, SDs, PKs, PRs, etc, which are available to
information in the TOP. Some portions of those
documents may be utilized in procedures but only as
examples for purposes of explanation. Test equipment
(oscilloscopes, voltmeters, etc) and parameters
involved in circuits being tested, adjusted, or
checked are usually prescribed. However, setup and
method operation is not described unless it is unusual
or unique.
IXL PHILOSOPHY
operating telephone company offices, are referenced
where applicable rather than duplicating that
the Input/Output (I/O) message manuals. Symptoms described
precise structure of the power alarm message is given in
other conditions that are observable at the frame that
would enable the user to access the proper trouble-clearing
ANALY:TLPFILE:SUSPECTED FAULTY EQUIPMENT and ANALY:
TLPFILE:NULL PACK TEST GENERATED, reference to procedures
EQUIPMENT list, those procedures reference the
appropriate procedure which identifies what to do with
TAP PHILOSOPHY
When documenting a procedural approach to trouble clearing,
replacements, the replacement part is always assumed to
be good. Equipment used for testing, both built-in
(hardware and software) and commercial, is assumed to
be good.
certain assumptions are made. It is assumed that only one
fault is being cleared at a time. When directing the user
performed correctly. Similarly, when directed to make
improvements to the data are encouraged. Manufacturer,
the user. Submittal of additions, corrections, and
procedure. These conditions are blown fuses and lighted
part of the Auxiliary Data System and is therefore
The maintenance philosophy contained in this pratice is
intended to aid personnel in performing trouble-clearing
the intended depends upon input and feedback from
alarm. The user should be able to follow aisle pilot
lights thereby locating the frame with the power fault
that is automatically powered down (
in the IXL reflect the preceding assumptions, and indicate
the next level of trouble clearing, raw data analysis,
this list. If not successful, these procedures reference
to perform an action, the action is assumed to have
tasks. The degree to which these procedures accomplish
practice although it is physically located in the API
100
Issue 2 JAN 1998
TAD
PAGE 1 of 3
234-351-016