GAI-Tronics 7085-004-UL, 7085-004-EX SmartSeries Multi-Party Hazardous Area Handset/Speaker Amplifier Enclosure w/ Alternate Page - Manual (Page 10)

Pub. 42004-694L2B
Model 7085-004-UL/EX SmartSeries Multi-Party Haz. Area Amplifier Enclosures Page: 10 of 12
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11/07
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 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. Note: 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.