Section II. TROUBLESHOOTING
Direct support (intermediate) level troubleshooting of the MWS will be accomplished on equipment that is in
a functional installation or in a bench test setup (para 6-19).
The scope of direct support (intermediate) level troubleshooting is summarized in table 6-3. The
probable causes, and corrective actions are arranged in accordance with the sequence of steps involved in the post-
6-6. Troubleshooting Tests
Tests indicated in the troubleshooting chart are simple power (voltage) or continuity (resistance) checks.
Use of a standard multimeter (voltohmmeter) or general purpose oscilloscope will facilitate fault isolation to
the authorized component level.
If a voltohmmeter (or oscilloscope) is not available, suspect components must be replaced until proper
functional checkout results are obtained.
Refer to paragraphs 2-9 and 2-10 for functional (performance test) procedures and to paragraph 6-19 for
bench test procedures.
Refer to Section IV of this chapter for procedures involving use of a voltohmmeter or oscilloscope.
Table 6-3. Direct Support Intermediate) Troubleshooting Chart
1. No tamper alarm
a. Battery (-ies) defective
a. Test/Replace battery (-
b. PWB Assy defective
b. Replace PWB Assy
2 Continuo -'repetitive
a. Loop sensor improperly connected
b. Tamper switch improperly adjusted
c. Defective EOL Module
d. Defective loop sensor
d. Test/Replace loop sensor
e. Defective input and filter assy
e. Test/Replace assy
f: Loose/broken electrical connection
f. Check, Repair wiring
g. No power from Control Unit
g. Test power input to SPU
h. Defective PWB Assy
h. Replace PWB Assy
3. No operational alarm
a. SENSITIVITY set too low
a. Adjust SENSITIVITY
b. Battery (-ies) defective
b. Test/Replace battery (-
c. PWB Assy defective
c. Replace e PWB Assy
a. Loop sensor movement
Check secure loop
b. SENSITIVITY set too high
b. Adjust, SENSITIVITY
c. Defective PWB Amy
c. Replace PWB Assy
Section III. MAINTENANCE OF MAGNETIC WEAPON SYSTEM
Repair of the MWS shall be limited to replacement of the following:
(1) Defective or depleted batteries.
(2) Defective EOL Module.
(3) Defective loop sensor.
(4) Defective Input and Filter Assembly.
(5) Defective PWB Assembly.
(6) Defective SPU enclosure (cover or chassis, or both).
Other authorized repairs shall include:
(1) Resoldering of broken or defective wire solder connection.
Replacement of discrete defective hookup wire(s)
(3) Replacement of defective or missing screw fasteners
Disposition of parts replaced will be in accordance with the applicable maintenance and recoverability codes in
6-8 Battery Replacement
Mercury battery cells characteristically undergo a severe thermal reaction if the terminal are
shorted for a sufficient period of time. This thermal reaction may result in an explosion that
would be hazardous to nearby personnel.