GAI-Tronics 12521-002 User Manual

Pub. 42003-224A

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Microphone Assembly Replacement Kit

for 293 & 294 Series Phones

Model 12521-002

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 12521-002 Microphone Assembly Replacement Kit is used in all 293 and 294 Series Phones.
This kit includes the following com ponents:

Qty Description

1 Microphone Assembly
1 Tie Wrap

Installation

Removing the Old Microphone Assembly

1. Use a Model 233-001 Tamper-Resistant Screwdriver to loosen and remove the four front panel

tamper-resistant screws. Note that field wiring will restrict complete removal of the front panel.
Record all field wiring terminations to unit and disconnect field wiring to allow front panel to be
placed on a working surface.

2. Carefully cut the tie wrap that secures the speaker, ho ok switch, and microph one wires to the tie

anchor.

3. Unplug the microphone connector from J4 on the printed circuit board.

4. Remove the two mounting screws from the microphone assembly. See Figure 1.

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

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

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ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

Pub. 42003-224A

ODEL 12521-002 MICROPHONE ASSEMBLY REPLACEMENT KIT Page: 2 of 2

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Figure 1. Microphone Assembly

Installing the New Mi crophone Assembly

Refer to Figure 1.

1. Remove the two Keps nuts holding the new microphone assembly together. These nuts are for

shipping purposes only and are not used in the phone. Keep the two Phillips head screws. These will
be used to mount the new microphone assembly to the phone.

2. Position the microphone in the front panel as shown in Figure 1 and use the screws from step one to

mount the microphone in place. Make sure the wires from the microphone are not pinched by the
pressure plate as you tighten the screws.

3. Route the microphone wires under the PCBA and plug the microphone connector into J4.

4. Using the supplied tie wrap re-anchor the speaker, hookswitch, and microphone wires to the tie

anchor.

5. Reconnect all field wiring as noted in step 1 of the “Removing Old Microphone Assembly” section.

6. Place the front onto back box, tighten the tamper-resistant screws, and make a test call from the unit.

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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