DIRECT SUPPORT (INTERMEDIATE)
Section I. GENERAL
The Audible Alarm contains rechargeable batteries which may generate ignitable amounts of hydrogen
gas if certain failures occur.
Do not smoke when opening the enclosure door. After opening, allow the unit to ventilate with the door
open for two minutes before turning the POWER switch to OFF or performing any maintenance action.
If excessive heat or fumes of any nature are being emitted from the Audible Alarm, immediately open the
enclosure door and ventilate for two minutes before turning the power off.
Do not smoke in the vicinity of the unit during the two-minute ventilation period.
following isolation of a J-SIIDS malfunction to the
audible alarm. However, the performance standards
This chapter provides specific instructions for all main-
contained in Section V may be used at periodic intervals
tenance function authorized direct support maintenance
to check the ability of the audible alarm to perform its
personnel by the maintenance allocation chart (app B.).
Included is a description of controls used by direct
support maintenance personnel, and a list of test
Direct Support Controls
troubleshooting and repair instructions and performance
There are three switches that are used by direct sup-
port maintenance personnel. The functions of internal
tamper (door) switch S1 (37, fig. C-1), external tamper
(pry-off) switch S2 (34) and AC power switch S3 (25) are
These maintenance instructions are primarily for use
Section II. TOOLS AND EQUIPMENT
instructions contained in this chapter using authorized
Standard Tools and Equipment
Table 2-1 lists standard tools and test equipment
Special Tools and Equipment
required at direct support maintenance level. Obtain
No special tools and equipment are required for direct
other commonly used tools and equipment having
support maintenance of the audible alarm.
general application to the audible alarm maintenance
Section III. TROUBLESHOOTING
performance standards test. If failure indication is
repeated after all instructions in the corrective action
column of Table 5-1 have been completed, turn off test
Before troubleshooting the audible alarm, make a
equipment and turn the audible alarm POWER switch to
thorough visual inspection. Check wiring insulation and
OFF. Disconnect P2 and examine the assembly for
components for evidence of failure. Check housing
bent, broken, loose, dirty, or missing pins and
interior for presence of moisture and other foreign
of wires. Make a thorough visual inspection of wiring
insulation and components.
Troubleshooting the Audible Alarm
The troubleshooting table 5-1 lists all symptoms and
probable causes that may appear while performing the
Change 2 5-1