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Model 7325-106 Multi-Party Amplifier Enclosure

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

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

Feedback occurs

1. If a speaker is close to the station, try using the muting feature in the amplifier

only during

enclosure at the terminal blocks. Connect the violet wire at TB1-8 to TB1-7.

page.

Refer to the wiring diagram.

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

adversely affected.

3. Check line terminations at the line balance assembly. Line balance assembly

connections are critical.

Crosstalk

One or more system cable pairs may be improperly terminated. Visually inspect

occurs.

the system cable connections for accidental crossing of the cable pairs or grounds.

f:\standard ioms - current release\42004 instr. manuals\42004-370e.doc

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Solution

: If too many stations are selected, paging coverage can be

OTE

Pub. 42004-370E

systems operating effectively.

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