Pub. 42003-227A
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Microphone Assembly Replacement Kit
for 297 & 298 Series Telephones
Model 12521-003
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 Item Number
1 Grille 1
1 Microphone Mounting Block 2
1 Microphone Assembly 3
1 Microphone Gasket 4
1 Microphone Mounting Bracket 5
2 KEPS Nuts 6
1 Tie Wrap
Installation
Removing the Old Microphone Assembly
1. Use a Model 233-001 Tamper-Resistant Screwdriver to loosen and remove the six front panel tamper-
resistant screws. Note that 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. Carefully cut the tie wrap that secures the speaker, hookswitch, and microphone wires together.
3. Unplug the microphone connector from J4 on the printed circuit board assembly (PCBA).
GAI-Tronics Corporation 400 E. Wyomissing Ave., Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
V
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Pub. 42003-227A
ODEL 12521-003 MICROPHONE ASSEMBLY REPLACEMENT KIT Page: 2 of 2
M
4. Remove the 2 KEPS nuts from the microphone assembly and lift old microphone off the front panel.
Carefully remove old microphone grille. See Figure 1.
Figure 1. Microphone Assembly
Installing the New Microphone Assembly
Refer to Figure 1.
1. Place new microphone grille (1) onto the two mounting studs on the front panel.
2. Place new microphone mounting block (2) onto the two mounting studs over the top of the grille from
step 1.
3. Thread microphone assembly (3) wire leads through the microphone gasket (4) and through the
microphone mounting bracket (5).
4. Position the microphone assembly (3) into the microphone mounting block (2) and then place
microphone mounting bracket (5) over the assembly and onto the studs on the front panel. Place
KEPS nuts onto studs and tighten.
5. Plug the microphone wire leads into J4 on the PCBA.
6. Secure the speaker, hookswitch, and microphone wires together with supplied tie wrap.
7. Reconnect all field wiring as noted in step 1 of the “Removing the Old Microphone Assembly”
section.
8. Place the front panel 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
N
the unit’s original installation manual for adjustment instructions.
f:\standard ioms - current release\42003 kit manuals\42003-227a.doc
09/09
Loading...