GAI-Tronics 12521-004 User Manual

Pub. 42003-240A

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Microphone Assembly Replacement Kit

for RED ALERT™ Emergency Telephones

Model 12521-004

Confidential ity 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.
GAI-Tronics 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 12521-004 Microphone Assembly Replacement Kit is used in the 39x Series RED ALERT™
Emergency Telephones. The kit includes two gasket types, only one of which will be used, depending on
the type of telephone (flush-mount or wall-mount) being repaired. This kit includes the following
components:

Qty Description

1 Microphone assembly with wiring (See Figure 3.)
1 Microphone shield
1 Microphone gasket (thick) for flush-mount telephone
1 Microphone gasket (thin) for wall-mount telephone

Installation

Removing the Old Microphone Assembly

1. Use a Model 233-001 Security Screwdriver (Torx T-25 security tip) to loosen and remove the front

panel security screws. Field wiring will restrict complete removal of the front panel. Note all field
wiring terminations to unit and disconnect field wiring to allow front panel to be placed on a working
surface.

2. For the wall-mount telephone, remove the PCBA to allow access to the microphone assembly.

GAI-Tronics Corporation 400 E. Wyomissing Ave., Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

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Pub. 42003-240A

ODEL 12521-004 MICROPHONE ASSEMBLY REPLACEMENT KIT Page: 2 of 3

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3. Refer to Figure 1 and Figure 2 for the microphone locations for flush-mount and wall-mount

telephone, respectively. Remove the two screws holding the microphone assembly in place, and
retain them.

Figure 1. Microphone Location on

Flush-Mount Telephone

Figure 2. Microphone Location on

Wall-Mount Telephone

4. Unplug the microphone wire connector and make note of the location.

5. Pull the microphone assembly apart from both sides of the panel. If residual pieces of the gasket

material remain on the front panel, remove them.

Installing the New Microphone Assembly

Refer to Figure 3 and Figure 4 on page 3.

1. Apply the correct adhesive gasket to the back of the microphone shield, using the thicker gasket for a

flush-mount telephone, or the thinner gasket for a wall-mount telephone.

2. Install the microphone shield with gasket through the front panel.

3. Install the microphone assembly through the rear of the front panel.

4. Install the two self-tapping screws through the rear of the microphone assembly’s pressure plate to

secure. Cut the ties that keep the assembly together.

5. Plug in the wiring connector.

OTE: Installation of a new microphone may require the volume level to be readjusted. In this case, see

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the unit’s original installation manual for adjustment instructions.

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