Section IV. MAINTENANCE OF AUDIBLE ALARM

TM 5-6350-262-14/6

NAVELEX 0967-LP-466-9062

TO 31S9-4-33-1

Section IV. MAINTENANCE OF AUDIBLE ALARM

5-10. Disassembly and Assembly

5-8.

Scope

a. General The following procedures must be

a. This section contains instructions for direct

performed to disassemble and assemble the audible

support maintenance checks and services and

alarm. Component locations and attaching parts are

corrective maintenance of the Audible Alarm. The

illustrated in figure C-1, appendix C. The audible alarm

extent of maintenance to be performed by direct support

wiring diagrams are shown in figures 5-1 and 5-2.

personnel is governed by the maintenance allocation

WARNING

chart (app B) and allocation of parts (app C).

b. The information in this section supplements that

Power to the JSIID systems must be

in Section III (troubleshooting) and provides instructions

shut down before any repairs or

for correcting malfunctions detected during visual

replacements can be performed on the

inspection and electrical checkout.

audible alarm if connected in system.

c. Repair of the audible alarm will be performed

(1) Place the POWER switch to OFF.

(2) Disconnect plug P2 (see fig. C-1) from

either at the installation site or at the repair facility

receptacle J2.

depending upon the complexity of the task. On-site

WARNING

repair will normally consist of replacement of defective

components only. Paragraphs 5-1 through 54 provide

A 115-volt ac potential may cause death

removal and replacement procedures for those items

under certain conditions; therefore,

requiring instructions in addition to the disassembly

reasonable precautions should be taken

sequence shown in the equipment exploded view (fig.C-

at all times.

1).Figures 5-1 and 5-2 show the component

(3) Disconnect the following JSIIDS power

interconnecting wiring.

Following shop repair, a

and interconnecting wiring from the following terminal

complete functional test should be performed in

boards.

accordance with paragraph 5-6.

Terminal

Function

5-9.

General Maintenance Instructions

L1-1 .......................................... 115-volt ac

L1-2 .......................................... 115-volt ac

a. In-Process Inspection.

During shop repair,

L1-3 .......................................... Ground

inspect audible alarm after removal of parts for defects

L2-1 .......................................... Alarm input

not visible when the unit is assembled. Continue the

L2-2 .......................................... Signal common

inspection during assembly to insure that parts are

L23 ........................................... Tamper output

properly assembled and that the unit will meet

(4) Insulate wire terminals removed from

performance standards. During the repair process,

terminals L1-1 and L1-2 as a precautionary measure.

inspect the audible alarm for the following:

(5) Remove connector P1 (10, fig. C-1) from

(1) Components for cleanliness.

connector receptacle J1 (on electronic assembly (11))

(2) Painted surfaces for deterioration or

by removing two screws (7), 2 lock washers (8) and two

scratches.

flat washers (9).

(3) Screws for damage or corroded threads.

Figure 5-1. Audible alarm wiring diagram

(4) Nuts and screw holes to insure they are

(Located in back of manual)

not stripped.

Figure 5-2. Audible alarm schematic diagram

(5) Components for breaks, chips, or cracks.

(Located in back of manual)

(6) Electrical wiring for fraying or other

5-11. Power Transformer Replacement

damage.

(7) All attaching and mounting hardware for

WARNING

tightness.

Power to the JSIID systems must be

b. Cleaning.

Parts shall be cleaned using

shut down before any repairs or

prescribed procedures utilizing a soft camel's hairbrush,

replacements can be performed on the

lint-free cloth, or vacuum cleaner with suitable

audible alarm if connected in system.

attachment to remove accumulated dust from

a. Removal

components within the audible alarm housing.

(1) Set POWER switch to OFF position.

c. Repair Precautions. Use standard maintenance

(2) Disconnect battery wires.

practices and observe the following precautions: (1)

(3) Disconnect the following wires from

Use exact replacement parts if possible; a part with

terminal TB3-1, TB3-2, TB3-3, L1-2 and from pin 4 of

same electrical value or function but different physical

switch S3 (see fig. 5-2).

size may cause trouble.

(4) Remove four mounting screws (29, fig.

(2) Soldering irons of less than 50 watts

C-1) and four washers (30).

should be used to solder this equipment. Overheating

of some parts may cause damage.

Change 2 5-3