REPLACE 12 VDC POWER SUPPLY

TM 5-6350-275-24&P

3-65. REPLACE 12 VDC POWER SUPPLY. (See Figure 3-41 and Figure 3-4).

This task consists of:

a. Remove

b. Install

INITIAL SETUP

Equipment Condition:

General Safety Instructions:

Input power removed

Remove all jewelry while working on equipment.

Enclosure access cover removed

Wear ESD wriststrap while working on equipment.

Tools:

Screwdriver, flat tip, (Item 6, App B)

Screwdriver, flat tip, (Item 7, App B)

Materials/Parts:

Screwdriver, offset flat tip, (Item 43, App B)

12VDC Power Supply

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) Using a flat tip screwdriver, remove the gray wire, connected to power supply (17) transformer, from the

input power block terminal 4 (24) output side (Figure 3-4).

(2) Using a flat tip screwdriver, remove the white wire, connected to power supply (17) transformer, from the

input power block terminal 3 (24) output side (Figure 3-4).

(3) Remove the two slip-on terminals from the battery (12) positive and negative terminal connections.

(4) Tag and remove three wires from the Rectifier Assembly (19) slip-on terminal connectors.

(5) Tag and remove the AC failure wire from Leda Flex Termination PWA (1), TB-6 (22).

(6) Using an offset flat tip screwdriver, remove the upper screw (13) and washer (14) from power supply

assembly (17).

(7) Using a flat tip screwdriver, remove the lower screw (15) and washer (16) from power supply assembly (17)

and remove power supply.

b. Installation

(1) Align power supply (17) up with holes in Leda panel assembly (10) and secure to panel using two screws

(13 and 15) and washers (14 and 16).

(2) Connect the tagged wires to Rectifier Assembly (19) slip-on terminal connectors.

(3) Connect the two slip-on terminals to the battery (12) positive and negative terminal connections.

(4) Using a flat tip screwdriver, connect the gray wire, connected to power supply transformer, to the input

power block terminal 4 (24) output side (Figure 3-4).

3-148