Listen Technologies LR-300 EN - Manual (Page 53)

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Information
Troubleshooting LR-300, LR-400, LR-500 Receivers
Troubleshooting
The receiver has no power.
Make sure the unit has either fully charged batteries or a Listen approved wall transformer
connected. Make sure the VOLUME knob has been rotated to the ON position. If this does not
work, try a different set of batteries. Make sure the batteries are installed properly.
There is no audio.
Make sure you have turned the volume control up. Make sure the earphone is plugged all the
way into the jack on the top of the unit. Make sure the transmitter is broadcasting an audio
source. Make sure you’re tuned to the same channel as the transmitter. If the RF signal is too
weak, the receiver will squelch and mute the audio source; move closer to the antenna or make
sure the transmitter’s output RF power switch is set on “FULL” (LT-800).
The audio is distorted.
Make sure you’re receiving on the correct channel. Make sure the audio on the
transmitter is not turned up too loud; this will cause distortion. Make sure the earphone
connector is pushed all the way into the jack on top of the unit. If you’re using the
LR-300, re-scan the channels to find the clearest channel. Make sure the SQ™ switch on your
transmitter and receivers is turned ON (or OFF, if some of your equipment is not SQ™ capable).
Make sure you are not too close to the transmitting antenna. If you can’t get farther away from
the antenna, turn down the RF output power on the stationary (LT-800) transmitter.
There is interference.
Try different frequencies on the transmitter and receivers until you find a clear channel. If this
does not work, try a different frequency band (i.e. if you are using 72 MHz, try 216 MHz or vice
versa). This is accomplished by returning the equipment to Listen (at no charge). Please contact
Listen technical support for assistance (see page 52 for information).
My LR-300 sounds distorted or there is no audio.
Because the LR-300 has no LCD display, it is important to recognize when the unit is locked on a
channel. If the unit sounds distorted or there is no audio heard and pressing the seek button does
not correct the problem, the unit is probably locked on the wrong channel. Press and hold the
seek button for 5 seconds to unlock.
I cannot pick up the signal on the receiver.
Check to make sure the receiver and the transmitter are on the same frequency and
channel. Also make sure the receiver is in broadcast range of the transmitter.
I can pick up the signal on the receiver, but it sounds like it’s not tuned in.
Check to make sure the transmitter and receiver are on exactly the same channel
number/letter. If you’re using the LR-300, re-scan the channels to find the clearest
channel by pressing SEEK.
I’m using another brand of transmitter - how do I tell which channel to use?
Refer to Listen’s Frequency Compatibility Tables (pages 47-48). Either adjust the transmitter or the
receiver to a common channel.
There is not sufficient range.
Make sure you are located as close as possible to the antenna of the transmitter. Try to place the
antenna as high as possible and free from obstacles. You can also check the squelch setting;
perhaps it is too sensitive. To change this setting, refer page 20 (LR-500) or to page 43 (LR-400).