Troubleshooting - Listen LT-800 User Manual

LT-800 Troubleshooting
The LT-800 has no power
Make sure the LA-201 power transformer is connected to a power source and is
connected to the jack marked "Power Input". Make sure the POWER button is
pressed.
There is no audio or the audio level is too low
Make sure that you have an audio source properly connected to Input 1 and/or
Input 2. The Input 1 or Input 2 switches must be in the correct position for the
appropriate input level. For example: if you are using the output of a mixer on
Input 2, the switch should be in the Line position. If it were to be in the
Speaker position, the level would be too low. Also, check the Input knob to
ensure it is properly adjusted. You should be able to see the VU meter deflect
on Input 1 or Input 2 corresponding with the input level of the audio source.
Try connecting a headset to the front panel jack and adjusting the Monitor vol-
ume control so that you can listen to the audio source.
The audio is distorted
Check to make sure you have the input level select switches in the proper posi-
tion. You may be providing too much audio level for the input stage to handle.
Make sure the SQ switch is in the correct position on both the LT-800 and the
receivers you are using. If your receivers do not have SQ, make sure the SQ
switch inside the top of the LT-800 is turned off (see page 5).
There is hum in the audio
Make sure you have properly grounded the audio source to the LT-800. Check
the connections from the audio source to the LT-800. If you can, try to use a
balanced audio source - this will reduce the chance of creating hum. Try con-
necting a ground from the LT-800 to ground and/or to the ground of the source
audio.
There is a tone
The Test Tone button has been pressed (its LED light is on). Push the Test
Tone button to turn off the tone.
I cannot change the broadcast channel
When the unit is locked, the decimal by the channel indicator is illuminated.
The unit is locked. To unlock, press the Up and Down buttons simultaneously
for 5 seconds.
The Audio Input 1 sounds "tinny"
If you are using an unbalanced audio source, make sure Pin 3 on the XLR or the
ring on the ¼" plug is grounded (see page 6).
I cannot pick up the signal on the receiver
Check to make sure the receiver and the transmitter are using the same fre-
quency band (i.e. 72MHz or 216MHz) and that they are on the same channel.
Make sure the LT-800 has an antenna connected. Ensure that the receiver has
an antenna (LR-500, 400 or 300 headset or LR-100 or 600 antenna).
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 chan-
nel. It's a good idea to lock the channels once they have been set. To lock the
LT-800, press the UP and DOWN buttons simultaneously for a 5 seconds (see
14
page 6, Power Up instructions).