GAI-Tronics Smart 707-001-EX-F07045 Посібник з технічного обслуговування - Сторінка 10
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Друкувати сторінкуModel 707-001-EX-F07045 SmartSeries Hazardous Area Speaker Amplifier Enclosure
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. 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
One or more system cable pairs may be improperly terminated. Visually inspect the
occurs.
system cable connections for accidental crossing of the cable pairs or grounds.
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11/07
Solution
Pub. 42004-703L2A
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