12
LM
LECTROSONICS, INC.
TROUBLESHOOTING
Before going through the following chart, ensure that you have a good battery in the transmitter. It is important that
you follow these steps in the sequence listed.
SYMPTOM
POSSIBLE CAUSE
TRANSMITTER BATTERY LED OFF
1. Battery is inserted backwards.
2. Battery is dead.
NO TRANSMITTER MODULATION LEDs
1. Gain control turned all the way down.
2. Battery is in backwards. Check power LED.
3. Mic capsule is damaged or malfunctioning.
4. Mic cable damaged or miswired.
RECEIVER INDICATES RF BUT NO AUDIO
1. Ensure that the transmitter and receiver Frequency Select
Switches are set to the same frequency.
2. Make sure the compatibility mode is the same on transmitter
and receiver.
RECEIVER RF INDICATOR OFF
1. 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 range is too great.
NO SOUND (OR LOW SOUND LEVEL),
RECEIVER INDICATES PROPER
AUDIO MODULATION
1. Receiver output level set too low.
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 as transmitter is being used.
(Refer to Attaching and Microphone and Adjusting Gain in this
manual.)
2. Receiver output 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. Excessive wind noise or breath “pops.” Reposition microphone,
or use a larger windscreen, or both.
4. Transmitter is not set to same frequency as receiver. Check that
frequency select switches on receiver and transmitter match.
5. RF interference. Reset both transmitter and receiver to a clear
channel.
HISS AND NOISE -- AUDIBLE DROPOUTS
1. Transmitter gain (audio level) far too low.
2. Receiver antenna missing or obstructed.
3. Operating range too great.
4. RF interference. Reset both transmitter and receiver to a clear
channel.
EXCESSIVE FEEDBACK
1. Transmitter gain (audio level) too high. Check gain adjustment
and/or reduce receiver output level.
2. Transmitter too close to speaker system.
3. Mic is too far from user’s mouth.
