FM-AV4 PORTABLE WIRELESS SOUND SYSTEM OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM
OPERATING TIPS WHAT ARE THE CAUSES OF FEEDBACK? Feedback (squealing) occurs when the sound from the speaker re-enters the microphone, comes back out
OPERATING INSTRUCTIONS This section covers the initial adjustments to the FM870 and the companion transmitter that must be made before the system is
OPERATING INSTRUCTIONS cont’d USING HARD-WIRED MICROPHONES Any low inpedence, unbalanced, dynamic microphone can be plugged into the AUX MIC INPUT.
MICROPHONE CHOICES M140 - This is the microphone supplied with the standard FM-AV4 system. It is a cardioid (directional) microphone for lavalier (&
TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that yo
ACCESSORIES AND REPLACEMENT PARTS ITEM DESCRIPTION CH-40 Battery Charger HM142V Single headband Headset Microphone HM152V Double headband Headset
SPECIFICATIONS OVERALL FM-AV4 SYSTEM Operating frequency: 150 to 216 MHz Wireless operating range: Up to 750 feet FM deviation: + or - 15 KHz Dist
SERVICE AND REPAIR If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repai
LIMITED ONE YEAR WARRANTY The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was pu
INTRODUCTION Thank you for selecting the FM-AV4 Portable Wireless Sound System. This system represents over 80 years of combined experience in the d
GENERAL TECHNICAL DESCRIPTION The FM-AV4 Portable Wireless Sound System consists of an FM870 combination wireless receiver/amplifier/speak
CONTROLS AND FUNCTIONS POWER/FUNCTION: A rotary switch which turns the power off and on and selects the operating mode. OPERATE: Set in this posi
CONTROLS AND FUNCTIONS cont’d WIRELESS MIC VOLUME: This control adjusts the volume of the built-in wireless microphone system. This knob does not a
M170 SERIES TRANSMITTERS Standard FM-AV4 systems include an M170 belt-pack transmitter which is designed to be used with a lavalier or h
M170 SERIES TRANSMITTERS cont’d The BATTERY used in the transmitter should bea9Volt alkaline battery which will provide up to 15 hours or more of ope
SYSTEM SETUP This section includes some basic steps that will ensure trouble-free operation of your FM-AV4 system: 1) Make sure the transmitter ba
SYSTEM SETUP cont’d 4) If you have more than one transmitter on the same frequency, turn on only one transmitter at a time. You cannot use the two
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