21
Receiver won’t turn on (power light doesn’t
turn on)
• Verify that the power supply is plugged into
both the receiver and a working wall outlet
• Test with another power supply
Receiver keeps going into standby mode
when playing auxiliary audio
• Volume level on auxiliary audio device is set
too low
Receiver will not "wake up" from standby mode
• Volume level on auxiliary audio device is set
too low
• Make sure microphone is on and working cor-
rectly, and the receiver is receiving the signal
Adapto LED keeps flashing on and off
• This is normal. The light will turn on when
the Adapto platform is processing the speech
signal. There is nothing you need to do
’Dead spots’ or microphone crackling/noise
• Verify that you are not blocking either the
emitters on the microphone or the sensors
on receiver or mounted around room
• If reception is interrupted or noisy when facing
a certain direction, install an additional sensor
in that area of the room (see
Installer Guide
)
• If using more than one microphone, verify
that they are not on the same channel
• Recharge or replace the microphone batteries
No signal reception (channel indicator light
on receiver is red)
• Check that the microphone is on
• Check that the microphone is not muted
(940TM only)
• Verify that you are not blocking either the
emitters on the microphone or the sensors
on receiver or mounted around the room
• If reception is interrupted when facing a
certain direction, install an additional sensor
in that area of the room (see
Installer Guide
)
• If using more than one microphone, verify
that they are not on the same channel
• Recharge or replace the microphone batteries
Feedback (squealing)
• Lower the Microphone A or B Volume control(s)
on the receiver
• Make sure that speakers are mounted as close
as possible to the ceiling and to the listening
area; avoid mounting speakers in the teacher’s
primary lecture area
• Position the microphone closer to mouth
• Select the Low or Medium OptiVoice setting
• Set the gain switch on the pass-around
microphone to "mid" or "low"
Weak or no output from speaker(s)
• Increase the Microphone A or B Volume
or Aux-In Audio Volume control(s) on
the receiver, or audio device
• Position the microphone closer to mouth
• Set the gain switch on the pass-around
microphone to "mid" or "high"
• Verify that the speakers have been properly
installed
High or low pitched whine or hum coming
through speakers
• There may be a ground loop with the
system. Install a ground loop isolator (see
Installer Guide
)
• There may be "noisy" electrical wiring. Install
an AC line filter (see
Installer Guide
)
Sensor lights are blinking
• This is normal. When the 940R is in standby mode
the sensor LED's will blink every two seconds
Charger light won't come on or is blinking red
• Check that the charger is connected to a
working power outlet
• The charger can charge only 950H and
940TM microphones with charge contacts.
Refer to page 3, feature 12 to confirm that
your microphone has these contacts.
• You may be attempting to charge an
alkaline battery or a rechargeable battery
that has reached the end of its useful
life. Check the battery and replace with a
FrontRow "silver sleeve" rechargeable battery.
Troubleshooting
