GAI-Tronics 12520-011, 12520-012 User Manual
Pub. 42003-239B
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Piezo Switch Assembly R eplacement Kit
for 300 Series Telephones
MODELS 12520-011 AND 12520-012
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAITronics retains all intellectual property and other rights in or to the information contained herein, and
such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
General Information
The Model 12520-011 (red) and 12520-012 (black) Piezo Switch Assembly Replacement Kits are
intended for use in GAI-Tronics 300 Series Telephones equipped with the cold weather option (-003 and
-004).
The Model 12520-011 is for use on the Model 393, 393AL, 394AL, 396, 397, and 398 Series
Telephones. The Model 12520-012 is for use on the Model 394AL, 396, and 398 Series Telephones.
The replacement procedures are the same for both kits.
Kit Components
Qty. Description Required Tools
1 Piezo Switch Assembly
1 O-Ring
1 Tie Wrap
#1 Phillips screwdriver
1-1/4-inch box wrench
Model 233-001 Security Screwdriver
Wire cutters
Model 393, 393AL, and 394AL Series T elephones
Removing the Old Piezo Switch Assembl y
1. Use a Model 233-001 Security Screwdriver to loosen the four front cover screws. Save the screws
for re-assembly.
2. Lift the front cover assembly away from the back box.
3. Disconnect the telephone line cord and strobe wires, if applicable.
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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Pub. 42003-239B
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ODELS 12520-011 AND 12520-012 PIEZO SWITCH ASSEMBLY REPLACEMENT KIT Page 2 of 3
4. Place the front cover assembly
face down on a flat surface.
5. Use the wire cutters to snip the tie
wrap that is securing the pushbutton assembly cable to the other
wires.
6. Unplug the piezo switch cable
assembly connector from the
PCBA. Be sure to note the
location of the connection for reassembly.
7. Remove #4-40 screws securing
PCBA to standoffs using #1
Figure 1. Piezo Push-Button Switch Assembly, Exploded View
Phillips screwdriver. Pull PCBA
away.
8. Using the 1-1/4 inch box wrench, loosen the hex nut. See Figure 1 for location.
9. Remove and discard the hex nut and piezo switch assembly. Remove any residual gasket material
from the front cover.
Installing the New Piezo Sw itch Assembly
1. Slide the O-ring over the piezo switch threads to the undercut location.
2. From the front side of the panel, push the new push-button assembly through the hole. See Figure 1.
3. Secure the piezo switch assembly to the front cover using the hex nut. See Figure 1.
4. Use the enclosed tie wrap to secure the push-button assembly cable to the other wires, and attach to
the anchor.
5. Replace the #4-40 screws that secure the PCBA to the standoffs.
6. Plug the push-button assembly cable into the PCBA at the proper location noted earlier.
7. Reconnect the telephone line cord, and strobe wires, if applicable.
8. Align the front cover with the rear enclosure, and use the Model 233-001 Security Screwdriver to
secure four front cover screws (previously saved).
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