TM 5-6350-275-24&P
3-77.
REPLACE 12 VDC POWER SUPPLY. (See Figure 3-43 and 3-6).
This task consists of:
a. Remove
b. Install
INITIAL SETUP
Equipment Condition:
General Safety Instructions:
Input power removed
Remove all jewelry while working on
Enclosure access cover removed
equipment.
Wear ESD wriststrap while working on
Tools:
equipment.
Screwdriver, flat tip, (Item 6, App B)
Materials/Parts:
Screwdriver, flat tip, (Item 7, App B)
12 VDC Power Supply
Screwdriver, offset flat tip, (Item 43, App B)
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 transformer (28) from the
input power block terminal 4 (7) output side (Figure 3-6).
(2) Using a flat tip screwdriver, remove the white wire, connected to power supply transformer (28) from the
input power block terminal 3 (7) output side (Figure 3-6).
(3) Remove the two slip-on terminals from the battery (27) positive and negative terminal connections.
(4) Tag and remove three wires from the Rectifier Assembly (15) slip-on terminal connectors.
(5) Tag and remove the AC failure wire (Figure 3-6) from Leda Flex Termination PWA (1), TB-6 (26).
(6) Using an offset flat tip screwdriver, remove the lower screw (11 ) and washer (10) from power supply
assembly (9).
(7) Using a flat tip screwdriver, remove the upper screw (12) and washer (13) from power supply assembly (9)
and remove power supply.
b. Installation
(1) Align power supply (9) up with holes in panel assembly (6) and secure to panel using two screw (11 and
12) and washers (10 and 13).
(2) Connect the tagged wires to Rectifier Assembly (15) slip-on terminal connectors.
(3) Connect the two slip-on terminals to the battery (27) positive and negative terminal connections.
(4) Using a flat tip screwdriver, connect the gray wire, connected to power supply transformer (28) to the input
power block terminal 4 (7) output side (Figure 3-6).
3-162
