Lectrosonics LMa - Manual (Page 16)

LMa
LECTROSONICS, INC. 16
Troubleshooting
It is important that you follow these steps in the sequence listed.
Symptom: Possible Cause:
Transmitter Battery LED off 1. Battery is inserted backwards.
when Power Switch “ON” 2. Battery is dead.
No Transmitter Modulation LEDs 1. Gain control turned all the way down.
when Signal Should be Present 2. Battery is in backwards. Check power LED.
3. Mic capsule is damaged or malfunctioning.
4. Mic cable damaged or miswired.
5. Instrument Cable damaged or not plugged in.
6. Musical instrument output level set too low.
Receiver Indicates RF But No Audio 1. Audio source or cable connected to transmitter is defective. Try
using an alternate source or cable.
2. Make sure the compatibility mode is the same on transmitter and
receiver.
3. Ensure musical instrument volume control is not set to minimum.
Receiver RF Indicator Off 1. Ensure that the transmitter and receiver Frequency Select
Switches are set to the same frequency.
2. Transmitter not turned on, or battery is dead.
3. Receiver antenna missing or improperly positioned.
4. Transmitter and receiver not on same frequency.
Check switches/display on transmitter and receiver.
5. Operating distance is too great.
No Sound (Or Low Sound Level), Receiver 1. Receiver output level set too low.
Indicates Proper Audio Modulation 2. Receiver output is disconnected; cable is defective or miswired.
3. Sound system or recorder input is turned down.
Distorted Sound 1. Transmitter gain (audio level) is too high. Check Modulation
LEDs on transmitter and receiver while distortion is being heard.
2. Receiver output level may be mismatched with the sound
system or recorder input. Adjust output level on receiver to the
correct level for the recorder, mixer or sound system.
3. Transmitter and receiver may not be set to the same compatibility
mode. Some mis-matched combinations will pass audio.
4. RF interference. Reset both transmitter and receiver to a clear
channel.
Wind Noise or Breath “Pops’” 1. Reposition microphone, or use a larger windscreen, or both.
2. Omni-directional mics produce less wind noise and breath pops
than directional types.
Hiss and Noise -- Audible Dropouts 1. Transmitter gain (audio level) far too low.
2. Receiver antenna missing or obstructed.
3. Operating distance too great.
4. RF interference. Reset both transmitter and receiver to a
clear channel.
5. Musical instrument volume set too low.
Excessive Feedback (With Microphone) 1. Transmitter gain (audio level) too high. Check gain adjustment
and/or reduce receiver output level.
2. Microphone too close to speaker system.
3. Microphone is too far from user’s mouth.