Atec Tektronix-1502 - Manual (Page 70)

TM 9-4935-601-14-3&P
20. Install the ZERO REFERENCE control in the Front Panel (see Figs. 5-21 and 5-22)
a. RESISTOR, VARIABLE MPL Item 2-27.
This variable resistor is listed in the Electrical Parts list.
b. Procedure
1. Form a bead of No. 3144 sealant around the threads of the bushing as shown in Fig. 5-21.
2. Flatten or remove the anti-rotation lug on the resistor housing.
3. Install nut as shown in Fig. 5-22.
4. Form a bead of No. 3144 sealant around the nut/bushing interface.
5. Use attaching hardware and install resistor in Front Panel.
21. Install the Record control (see Figs. 5-23, 5-24, and 5-25)
a. SWITCH, TOGGLE MPL Item 2-20.
b. CAP, TOGGLE SWITCH, SEAL MPL Item 2-21.
Figure 5-21. Application of sealant to ZERO REFERENCE
control bushing.
c. Procedure
1. Form a bead of No. 3144 sealant around the bushing/switch body interface as shown in Fig. 5-23.
2. Install nut that was supplied with the switch, as shown in Fig. 5-24.
3. Form a bead of No. 3144 sealant around the bushing/nut interface as shown in Fig. 5-24.
4. Use attaching hardware and install the toggle switch in the Front Panel.
5. Install the cap-seal on the toggle switch (see Fig. 5-25).
22. Install the VAR control and the GAIN control (see Figs. 5-26 and 5-27)
a. RESISTOR, VARIABLE
MPL Item 2-16 (VAR control; MPL Item 2-33 (GAIN control).
Figure 5-22. Application of sealant to ZERO
REFERENCE control bushing.
@FEB 1980
Figure 5-23. Application of sealant to RECORD
toggle-switch bushing.
5-14