Listen Technologies LT-700-150 LT-700Troubleshooting, The LT-700has no power, There is no audio

LT-700 Troubleshooting

Troubleshooting

The LT-700 has no power

Make sure the unit has fully charged batteries, or has a Listen LA-208 wall transformer connected to it. Press the ON button. If this does not work, try a different set of batteries. Make sure the batteries are installed correctly.

There is no audio

Make sure the MUTE/TALK switch is in the TALK position. Make sure you have the microphone plugged all the way in to the input jack. Make sure you are using a Listen approved microphone (see list on page 7). If you are using the line input, make sure you have connected a line level, unbalanced input at the ring of the connector.

The audio is distorted

Make sure you are using an approved Listen microphone. Try using a different mic sensitivity switch setting (the switch is located inside the battery compartment of the unit). If you are using a line level input, try turning down the level of the input. If you are using any equipment that does not have SQ capability, turn off SQ in the LT-700.

There is hum in the audio

The microphone may be too close to a transformer. Try moving around and see if the hum goes away.

The microphone level is low

The microphone must be in close proximity to the person who is speaking. If this does not work, try using a head-worn microphone. The mic sensitivity switch may be on the wrong setting, see page 7. Try a different setting (the switch is located inside the battery compartment). Some microphones have directional pickups, ensure that the microphone in use is oriented and positioned properly (pointing at the speakers mouth).

The audio doesn’t have much fidelity

If your receivers all have SQ capability, activate SQ in all units by moving their switches to the ON position. In the LT-700 and all SQ-equipped receivers, the SQ switch is located inside the battery compartment. See page 14 for more information.

There is too much noise

This is most likely because the microphone is not close enough to the speakers mouth, and it is picking up background noise. Try positioning the microphone closer or try using a microphone that is direc- tional (such as a head-worn mic). If you are using a narrow band channel, try switching to a wide band channel. Try another setting on the mic sensitivity switch (located inside the battery compartment). Ensure the microphone is not brushing up against anything. See page 7 for more information.

There is interference

Try different frequencies until you find a clear channel.

I cannot pick up the signal on the receiver

Make sure the transmitter and the receiver are on the same frequency band and channel.

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 using another brand of receiver refer to Listen’s Frequency Chart on page 16).

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