GAI-Tronics 12520-006, 12520-007 Push Button Replacement Kit for 293, 294, 297, 298 Series Emergency Phones - Manual (Page 3)

Pub. 42003-173
M ODELS 12520-006 AND 12520-007 R OUND P USH -B UTTON A SSEMBLY R EPLACEMENT K IT Page: 3 of 3
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Models 297 and 298
Removing the Old Push-Button Assembly
1. Use a Model 233 Tamper-Resistant Screwdriver to remove the six front panel screws. Save the screws
for re-assembly.
2. Lift the front panel assembly away from the back box approximately 6 to 8 inches.
3. Unplug the telephone line cord from the modular block in the back box.
4. Remove the front panel assembly, and place it face down on a flat surface.
5. Use the #2 Phillips screwdriver to remove the four screws securing the shield over the PCBA. Save the
screws for re-assembly.
6. Use the wire cutters to snip the tie wrap that is securing the push-button assembly cables to the other
wires.
7. Unplug the push-button assembly cable from the PCBA. Be sure to note the location of the connection
for re-assembly.
8. Using the 1/8-inch straight slot screwdriver, loosen the anti-rotation screws on the mounting nut.
9. Remove and discard the push-button assembly, the mounting nut and the mounting ring.
Installing the New Push-Button Assembly
1. From the front side of the panel, push the new push-button assembly through the hole. See Figure 1.
2. Secure the push-button assembly to the panel using the mounting ring, and the mounting nut.
See Figure 1.
N OTE : Ensure that the O-ring seal is in its proper location, as shown in Figure 1.
3. Tighten the anti-rotation screws on the mounting nut.
4. Plug the push-button assembly cable into the PCBA at the proper location noted earlier.
5. Use the enclosed tie wrap to secure the push-button assembly cable to the other wires.
6. Place the shield over the PCBA and use the #2 Phillips screwdriver to secure the four screws
(previously saved).
7. Plug the telephone line cord into the modular block in the back box.
8. Align the front cover with the rear enclosure, and use the Model 233 Tamper-Resistant Screwdriver to
secure six front panel screws (previously saved).