Control Panel Assembly Power Supply 1A1PS3 (+1O Vdc).

c. Control Panel Assembly Power Supply 1A1PS3 (+1O Vdc). Remove Control

Panel Assemblv 1A1 from the BTS in accordance with paragraph 3-32B and

perform the following:

Place the control panel in an upside down position on the test

(1)

bench.

Remove caution plate (1) - four pan head screws, lockwashers and

(2)

flat washers.

Tag and unsolder the 115 Vac input wires (2) and the two output

(3)

wires (3) from Power Supply PS3.

Remove pan head screw and lockwasher (4) securing PS3 to power

(4)

supply bracket.

Remove pan head screw, lockwasher and flat washer (5) securing the

(5)

hold down bracket between PS1 and PS3.

Lower and remove PS3 (7) with the hold down bracket and post (6).

(6)

(1) Pos tion replacement +10 Vdc Power Supply 1A1PS3 (7) and bracket

and post (6) on control panel.

(2) Fas en PS3 to power supply bracket, using pan head screw and

lockwasher (4).

(3) Fasten hold down bracket and post (6) to power supply bracket,

using pan head screw, lockwasher and flat washer (5).

(4) Solder 115 Vac input wires (2) and two output wires (3) to Power

Supply PS3, observing dc polarity.

(5) Install caution plate (1) with four pan head screws, lockwashers

and flat washers.

(6) Replace control panel in BTS according to paragraph 3-32d.

3-90