GAI-Tronics 7245-004 SmartSeries Indoor Remote Subset Amplifier Enclosure - Manual (Page 7)

Pub. 42004-644L2D
7245-004 Indoor Remote Subset Amplifier Enclosure Page 7 of 12
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Wiring
Feed the system wiring into the enclosure. Strip the insulation on each conductor of the system cable.
Install a ring lug on the ground conductor (GRN/YW wire). The wires must be spade-lugged and
connected carefully and completely to the terminal blocks in accordance with the colors indicated on the
system layout diagrams at the end of this manual. An improper termination may result in diminished
station performance.
Feed the speaker wiring into the enclosure. Strip the insulation on each conductor of the speaker cable.
Install spade lugs on each conductor. Connect the speaker wires of an 8-ohm speaker between the TB1-4
(speaker common) and TB1-5 (8-ohm) or connect the speaker wires of a 16-ohm speaker between the
TB1-4 (speaker common) and TB1-6 (16-ohm).
1. Set the speaker muting control to the desired location. Refer to the Local Muting and Mutual Muting
sections for details.
2. Plug the subset connector into the J2 receptacle located at the bottom of the enclosure. Secure the
connector with the connector guard and screws provided. See Figure 1.
3. Insert the plug-in amplifier into the J1 receptacle of the enclosure and secure the amplifier with four
screws.
Local Muting
Figure 5 illustrates local speaker muting when stations are completely assembled and paging operation
occurs. Normally, when the station button is pressed, the paging speaker connected to that station is
silenced (muted) to prevent acoustic feedback to the handset microphone. However, while the handset is
in use for party line conversations, the paging speaker is “live” to enable paging calls from other stations.
To disable the mute feature, follow these instructions:
1. Locate the lugged violet wire attached to terminal point 7 (mute) on the terminal block within the
enclosure.
2. Transfer the lugged violet wire to terminal point 8 (Page L1).
After any muting changes are made, unpack the station amplifier and install.
Mutual Muting
In the event that feedback occurs within an area and repositioning of the system speakers does not help,
mutual muting may be used to correct this problem.
Perform the following steps to mutually mute the adjacent amplifiers/handsets within a zone.
1. Ensure that the purple lugged wire is connected to terminal 7 of TB1.
2. Connect terminal TB1-7 of the handset station to TB1-7 of the station within the zone that is causing
feedback. This is done by using the spare system wire (orange conductor) from within the system
cable that runs between the stations.