GAI-Tronics 702-002 Single Party 24 V DC Amplifier Enclosure - Manual (Page 9)

Pub. 42004-147H
Model 702-002, 732-102, and 733-002 24 V DC Single-Party Amplifier Enclosures Page 9 of 12
f:\standard ioms - current release\42004 instr. manuals\42004-147h.doc
08/13
Maintenance
Regular inspection and a good preventive maintenance program will increase the reliability of your
GAI-Tronics station. The GAI-Tronics Field Service Department can formulate a service contract suited
to your facility’s specific need for preventive maintenance.
In addition, the following procedure can be used to keep Page/Party
®
systems operating effectively.
WARNING
Before performing any of the following preventive maintenance steps,
remove all power from the station.
1. Remove the amplifier from the enclosure.
2. Visually check the interior of the enclosure for signs of contamination such as dust, condensation or
process liquid.
3. Using the No. 10440-002 Maintenance Cable, plug the amplifier into the connector in the enclosure.
Check, and if necessary, adjust the amplifier to maximize performance.
4. Reinstall the amplifier in the enclosure. Ensure that all gaskets and hardware are in place. Failure to
install the gaskets, which also act as spacers, can result in damage to the connectors on the amplifiers
and inside the enclosures and can cause system faults.
It may become necessary to re-terminate some or all of the enclosures in a system. If so, strip the wires
back to clean copper and connect only one wire to each connector to allow for easier future
troubleshooting.
Troubleshooting
The following table lists some hints to aid technicians in troubleshooting.
Problem Solution
Feedback occurs
only during
page. 1. If a speaker is close to the station, try using the muting feature in the amplifier
enclosure at the terminal blocks. Connect the violet wire at TB1-8 to TB1-7.
Refer to Figure 4.
2. Ensure that speakers attached to other stations located nearby are not pointed
in your direction. If changing the orientation of the other speakers has no
effect, mutual muting may be required. Mutual muting silences all the
speakers within proximity to the affected stations during a page from any one
of the mutually muted stations.
Connect the orange wire (spare) to the TB1-7 of all the stations to be mutually
muted. N
OTE : If too many stations are selected, paging coverage can be
adversely affected.
3. Check line terminations at the line balance assembly. Line balance assembly
connections are critical.
Crosstalk
occurs. One or more system cable pairs may be improperly terminated. Visually inspect
the system cable connections for accidental crossing of the cable pairs or grounds.