Lectrosonics M187 - Manual (Page 11)

Belt-Pack Transmitter
TROUBLESHOOTING
Before going through the following chart, be sure that you have a good battery in the transmitter the red power LED
on the transmitter panel should glow brightly.
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.
VERY SHORT OPERATING DISTANCE 1) Mic cord not properly terminated. Shield wire may be touching the
connector shell. See page 7.
NO SOUND IS HEARD AND 1) Transmitter not turned on.
RECEIVER RF LAMP IS OFF 2) Transmitter battery is dead.
3) Receiver antenna missing or improperly positioned.
4) Transmitter and receiver not on same frequency. Check labels on
transmitter and receiver.
5) Operating range is too great.
NO AUDIO IS HEARD BUT RECEIVER 1) On/Off switch is in “mute”position
RF LED IS ON receiver or transmitter.
2) Microphone on/off switch is in “off” position.
NOTE: If the modulation level 3) Volume is turned down or off on transmitter or receiver.
LEDs on the receiver are 4) Receiver not properly connected to other audio equipment.
indicating properly, the problem 5) Transmitter POWER switch may be turned on and off (i.e. through
is NOT in the transmitter. the mute position). A “thump” should be heard in the sound, again
indicating a properly functioning receiver.
NO SOUND AND RECEIVER 1) Transmitter audio muted. Make sure front panel power
MOD LEVEL LEDs ARE OFF switch is in the on position.
NO SOUND BUT RECEIVER 1) Receiver audio is muted. Refer to receiver manual.
MOD LEVEL LEDs ARE ON 2) Receiver audio output is disconnected or cable is
defective or mis-wired.
3) Sound system or recorder input is turned down.
NOISE (HISS) IS HEARD ALONG 1) MIC LEVEL is too low.
WITH THE SIGNAL 2)Transmitter and receiver may be too far from one another.
3) Receiver antenna may be defective or disconnected.
DISTORTED SOUND 1)MIC LEVEL is too high.
2) Mic may be distorting; try a different mic and listen again.
3)PA system may be overloading.
EXCESSIVE FEEDBACK 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 too far from user’s mouth.
4) Sound system volume set too high.
Rio Rancho, NM – USA 11