Removal and Replacement of Control Unit

a. Replace control unit (para 3-12).

a. Replace dc-to-ac inverter (para

3-14).

(para 3-13).

c. Replace dc-to-ac inverter (para

3-14).

a. Replace control unit (para 3-12).

b. Replace receiver )para 3-13).

(para 3-13).

nect aircraft dc power connected from direction

3-12. Removal and Replacement of Control

finder set.

Unit

Caution: Before removing control unit, dis-

a. Removal.

connect aircraft dc power connected from direc-

(1) Disiconnect sense antenna and loop an-

tion finder set.

tenna cable connection at front of receiver

(fig. 1-2) .

a. Removal.

(2) Loosen the nut at front of receiver mount

(1) Remove the cable and connector at the

(fig. 1-3) which engages a hook on re-

rear of control unit.

ceiver (fig. 1-2). After loosening, push nut

(2) The control unit is secured to the pilot's

down to clear front of receiver.

instrument panel or control console with

(3) Grasp handle at front of receiver and pull

f o u r Dzus type, quarter-turn fasteners

receiver forward, removing receiver off

(one fastener at each corner of control

mount.

panel). Loosen the four fasteners and re-

move control unit.

b. Replacement.

(1) Slide receiver onto receiver mount and

make certain that connector at rear of re-

(1) Mount control unit on instrument panel

ceiver mates with connector at the rear of

and tighten the four quarter-turn fasteners.

receiver mount.

(2) Reconnect cable and connector at rear of

(2) Engage nut at front of receiver mount with

control unit.

book at front of receiver and tighten the

nut.

3 - 1 3 . R e m o v a l a n d Replacement of Receiver

(3) Connect the sense and loop antenna cables.

Caution: Before removing receiver, discon-