Removal and Replacement of Uhf Capacitor Tuning Shaft

TM5820-222-35-92

Figure 91. Uhf i n j e c t i o n system, right-rear view, first oscillator

cover plate removed.

b. Replacement.

124. Removal and Replacement of Uhf

(1) Reseat the frequency multiplier-

Capacitor Tuning Shaft

amplifier assembly on the uhf in-

a. Removal.

jection subunit and align the screw

(1) Remove the uhf injection subunit

h o l e s . Replace the 12 retaining

from the rt unit main frame (para

screws (1, fig. 93).

(2) Resolder the capacitor leads to the

(2) Index the tuning capacitor shaft and

junctions marked 2 (fig. 90).

crystal

switching

Caution: Do not place any strain

on the variable capacitor tabs. Sol-

(3) Remove the five retaining screws

der carefully; do not overheat.

and flat washers (2, fig. 92 and 91).

Slip the cover plate off the chassis.

(3) Connect and resolder the lead to the

(4) Remove the two spring-retaining

junction (1, fig. 90).

screws (1, fig. 94). Remove the

(4) Replace the cover plate and replace

spring.

t h e retaining screws marked 3;

(5) Slide the three grounding fingers

tighten the two screws (2, fig. 92).

(2, fig. 94) off the casting.

(5) Replace the uhf injection subunit in

(6) Remove the three screws (2, fig.

the rt unit mainframe (para 108b).

138