GAI-Tronics 12504-010 Keypad Replacement Kit for 491-201 Mine Dial Page Telephone - Manual

Pub. 42003-218B
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
G A I - T R O N I C S ® C O R P O R A T I O N
A H U B B E L L C O M P A N Y
Keypad Replacement Kit for
Model 491-204 Mine Dial Page Telephone
Model 12504-010
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.
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 12504-010 Keypad Replacement Kit for the Model 491-204 Mine Dial Page Telephone
includes the following components:
Qty Description
1 Keypad assembly
1 Keypad seal
1 Resistor, 100-ohm, 3-watt, WW or MF
3 Cable tie-wrap
Installation
Tools Required
• 5/16-inch nut driver
• 1/4-inch nut driver
• Phillips screwdriver
• Wire cutter
CAUTION
This upgrade replacement kit may only be installed by a GAI-Tronics
technician or by a GAI-Tronics authorized service center. Installation by any other service center
or personnel will void MSHA approval.
WARNING
Substitution of components may impair intrinsic safety.
R104 located on 69491-002 PCBA must be a 3-watt wire wound or metal film resistor to maintain MSHA
approval. See Figures 1, 2, 3 and 4 to give a visual aid to identify and determine if the PCB assemblies
were modified.