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Troubleshooting LR-4200 Receivers:
The receiver has no power
Make sure the unit has either a fully charged battery or a Listen approved wall charging transformer is
connected. Make sure the Power button on the top of the unit has been pressed to turn the unit ON.
If this does not work, make sure the battery is installed properly and / or install a replacement battery.
There is no audio
Make sure the volume control is turned up to at least 25%. Check the Intelligent Earphone/Neck Loop
Lanyard to insure it’s plugged in all the way. Make sure the Ear Phone is plugged into the Earphone/Neck
Loop Lanyard. Check to insure the transmitter/radiator(s) is broadcasting an audio source. Verify the receiv-
er is tuned to the same channel (frequency) as the transmitter/radiator(s). If the IR signal is too weak, the
receiver will squelch and mute the audio source; move closer to the transmitter/radiator(s) or add more
radiators to provide more range and freedom of movement.
The audio is distorted
Check the receiver is on the correct channel (frequency). Verify that the audio on the transmitter is not
turned up too loud; this will cause distortion. Insure the Intelligent Ear Phone/Neck Loop Lanyard connectors
are pushed all the way into the jacks on top of the unit. Check the Ear Phone to verify it is plugged all the
way into the Ear Phone/Neck Loop Lanyard. Make sure the receiver is not too close to the transmitter/
radiator.
I cannot pick up the signal on the receiver
Check to make sure the receiver and the transmitter are on the same exact channel frequency. Verify
the receiver is in broadcast range of the transmitter/radiator(s) by moving closer.
My battery is not charging
Verify the clear plastic pull tab has been removed from the receiver battery door engaging the battery
connections. Make sure the battery is installed properly and that the unit is plugged into the charging
device correctly. Check the charging device to verify it is plugged in the proper power outlet and
power is available at the outlet. If this does not work, install a replacement battery.
I want to run the unit from a wall transformer
Simply plug a Listen approved charging transformer (LA-421) into the Micro USB connector on the side of the
unit. A battery must be installed at all times even when operating the unit with a wall charging transformer.
