REPLACE EXTERIOR MICROWAVE MOTION SENSOR, PWA

TM 5-6350-275-24&P

3-116. REPLACE EXTERIOR MICROWAVE MOTION SENSOR, PWA. (Figure 3-64).

This task consists of:

a. Remove

b. Install

INITIAL SETUP:

Tools:

Equipment Condition:

Screwdriver, Cross tip (Item 5, App B)

Input power removed

Screwdriver, Flat tip (Item 6, App B)

Open End Wrench Set (Item 13, App B)

General Safety Instructions:

Remove all jewelry while working on

Materials/Parts:

equipment.

Exterior Microwave Motion Sensor, PWA

Wear ESD wriststrap while handling ESD

sensitive PWAs.

WARNING

Shut off power source before attempting to disconnect, service, or connect wires or cables. Failure to do so may result in

serious injury or death.

a. Removal

(1) Remove input power to transmitter (1) or receiver unit (2).

(2) Open cabinet door by turning two turn-key locks.

(3) Remove coaxial cable from PWA (4 or 6) coaxial connector.

(4) Tag and remove wires from PWA TB1 (5).

(5) Remove two phillips head screws (3) holding PWA (4 or 6) in place and remove PWA.

(6) Place the removed PWA in a ESD protective bag.

b. Installation

(1) Align PWA (4 or 6) with support standoffs and secure with two phillips head screws (3).

(2) Connect tagged wires to PWA TB1 (5).

(3) Connect coaxial cable to PWA (4 or 6) coaxial connector.

(4) Set dip switches to same position as on PWA (4) removed. (See SAIG, Appendix E, Section 8)

(5) Close cabinet door and secure with turn-key locks.

(6) Apply input power to sensor assembly.

(7) Check for correct alignment between transmitter and receiver unit. (See SAIG, Appendix E, Section 9).

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