CHAPTER 7 DIRECT SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS

TM 5-6350-262-14/7/NAVELEX 0967-466-0970/TO 31S9-4-28-1

CHAPTER 7

DIRECT SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS

Section I. GENERAL

alarm switch. However, the performance standards

7-1. Scope.

contained in Section V may be used at periodic intervals

This chapter provides specific instructions for all

to check the ability of the alarm switch to perform its

maintenance functions authorized direct support

intended mission.

maintenance personnel by the maintenance allocation

chart (appendix BI Included is a description of controls

used by direct support maintenance personnel, a list of

7-3. Direct Support Controls

test equipment required for total maintenance,

Two push button switches located under the alarm

troubleshooting and repair instructions, and performance

switch cover are used by maintenance personnel in

standards.

addition to the operator controls (para.

3-1) The

functions of reset switch S2 (8, fig. C-1) and tamper

switch S3 (13, fig. C-1) are described in paragraphs 6-4

7-2. Purpose.

and 6-5, respectively.

These maintenance instructions are primarily for

use following isolation of a J-SllDS malfunction to the

Section II. TOOLS AND EQUIPMENT

7-4. Standard Tools and Equipment

7-5. Special Tools and Equipment

Table 2-1 lists standard tools and test equipment

No special tools and equipment are required for direct

required for alarm switch maintenance.

support maintenance of the alarm switch.

Section III. TROUBLESHOOTING

procedures. The alarm switch schematic diagram, figure

7-6. Visual Inspection

6-1, shows sufficient test points to check voltage values

Before troubleshooting the alarm switch, make a

in the 20-volt dc control circuit and open/short

thorough visual inspection. Check wiring insulation and

impedance values in the two alarm circuits.

The

components for evidence of failure. Check housing

volt/ohm meter listed in table 2-1 is recommended for

interior for presence of moisture and other foreign

making these checks while the alarm switch is

matter.

interconnected with system components. The location of

component parts is illustrated in figure C-1.

7-7. Troubleshooting.

Troubleshooting the alarm switch requires no special

Section IV. MAINTENANCE OF ALARM SWITCH

normally consist of replacement of defective components

7-8. Scope.

only. Following shop repair, a complete performance

a. This section contains instructions for corrective

test should be performed in accordance with paragraph

maintenance of the alarm switch.

The extent of

7-12.

maintenance to be performed by direct support

personnel is governed by the maintenance allocation

chart (appendix B) and allocation of parts (appendix C}

7-9. General Maintenance Instructions.

b. The information in this section supplements that in

section III (troubleshooting) and provides instructions for

a. In-Process Inspection.

During repair, inspect

correcting malfunctions detected during visual inspection

alarm switch after removal of parts for defects not visible

and performance testing.

when the unit is assembled. Continue the inspection

c. Repair of the alarm switch will be performed either

during assembly to insure that parts are

at the installation site or at the repair facility, depending

upon the complexity of the task. On-site repair will

7-1