Troubleshooting
9
Check the fuse. Replace fuse only with same type and rating.
Double-check the position of the LINK switch.
Make sure that the MIC 5/TEL switch is in the TEL position.
Make sure the VOX control is set properly
When connecting the telephone Tip & Ring, make sure to use the two
outside terminals and not the center terminal (GND).
Check that the VAR MUTE control is not set to 4 (0 dB). This control adjusts the
level of the background music when making a page. See page 9.
Check your wiring connections for the 3-pin connector. Pin 1 is the shield con-
nection. Pins 2 and 3 connect to the balanced signal leads on the mic cable.
Make sure that phantom power switch (MIC 1 - 4) is on. See page 4.
Adjust the VOX control on the rear panel to eliminate any unwanted noise that
may be triggering the VAR MUTE circuit. See page 8
Adjust the VOX control counterclockwise to make the trigger activate at a lower
input signal level. See page 8.
Adjust the ALC control on the rear panel. See page 8.
Make sure MIC 6/AUX 1 switch is in the AUX 1 position.
Make sure the signal source is plugged into the AUX 1 RCA jack.
There are several causes for the FAULT LED to flash:
• Over-current. This is usually caused by the total speaker distribution imped-
ance being below 8 ohms, probably due to wiring failure or installation errors.
• High-temperature. Make sure that the amplifier’s vent slots are not blocked
and that there is adequate free air flow.
• DC voltage present on the amplifier outputs. To recover from this condition,
turn the power switch off, count to five, and then turn the power switch back on.
• High-frequency protection. Detection circuitry will cause the amplifier to
temporarily protect itself by muting the outputs. There is an automatic reset
of the amplifier for this condition.
Amplifier will not turn ON.
No audio output.
No telephone output.
AUX Input will not mute with telephone page.
Microphone squeals or hums when using the 3-pin
connectors but not when using screw terminals.
Condenser MIC will not work.
Telephone input cuts off the music when not making
a page.
Telephone input is choppy or cuts off the beginning
of a page.
The telephone page volume is too loud on some pages.
AUX 1 Input not working.
Amplifier flashes the FAULT LED.
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