Fig. 4-12. Removing the CRT assembly,

Fig. 4-11. Honeycomb assembly open and ready for voltage and waveform measurements.

4. Loosen the two nuts that secure the back of the switch

5. Lift the switch assembly up so the studs clear the mount-

ing bracket, then slide the assembly back and out of the

assembly to the rear mounting bracket.

instrument.

Reverse the removal procedure to remount the switch

assembly.

Removal of the DISPERSION RANGE Switch

1. Loosen the shaft coupling set screws. See Fig. 4-14A.

2. Grasp the nylon rocker arm linkage at the switch

(SW365) end and lift the linkage off the switch lever.

3. Remove the two mounting screws that hold the switch

assembly mounting bracket to the side frame.

4. Slide the switch assembly back and lift the assembly

out.

5. Loosen the set screws for the drive gears on bath the

switch shaft and the drive shaft. Loosen the set screw through

the mounting bracket casting (Fig. 4-14).

6. Pull the switch shaft to separate the two gears, then

unscrew the mounting bracket casting off the switch.

7. To replace, reverse the removal procedure, however,

make certain the new switch is in the same switched position

as the removed switch before tightening the drive gear set

screws.

Fig. 4-12. Removing the CRT assembly,

4-10