Figure 7-8. Replacement of power plug UP131M,

TM 11-6625-2629-14&P

Figure 7-8. Replacement of power plug UP131M,

7-20. Equipment Adjustments

b. Tuning Drive Mechanism (fig. FO-4). If the

drive mechanism for the tuning capacitor has

If repairs or replacements have been made within

been disassembled, it may be neceasary to adjust

the oscillator unit, it may be necessary to adjust

the gears for optimum mesh. Make this ad-

the shutter or dial on its shaft. Make the ad-

justment as follows:

justments as follows:

(1) Loosen the screws that hold the bracket

a. Shutter Assembly (fig. FO-4).

to the front panel so that the bracket may be

(1) Rotate the rotor (23) to the position that

positioned. The holes are oversize.

will put the 20- to 55-MHz coil on the rotor (23) in

( 2 ) Move the bracket so that the in-

contact with the tuning capacitor (31).

termediate gear meshes with the dial gear.

(2) Loosen the setscrews (33) on the drive

(3) Hold the bracket in the desired location

sprocket (47).

and tighten the screws. Use a small clamp to hold

(3) Rotate the drive sprocket (47) on the

the bracket.

shaft (46) until the shutter assembly (45) is in the

position for the 20-55 MHz band.

(4) Tighten the setscrew (33) that holds the

drive sprocket (47) to the shaft (46).

7-15