Lectrosonics FM870 User Manual

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FM-AV4
PORTABLE WIRELESS SOUND SYSTEM
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
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Summary of Contents

Page 1 - FM-AV4

FM-AV4 PORTABLE WIRELESS SOUND SYSTEM OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM

Page 2 - TABLE OF CONTENTS

OPERATING TIPS WHAT ARE THE CAUSES OF FEEDBACK? Feedback (squealing) occurs when the sound from the speaker re-enters the microphone, comes back out

Page 3 - RECHARGEABLE BATTERIES

OPERATING INSTRUCTIONS This section covers the initial adjustments to the FM870 and the companion transmitter that must be made before the system is

Page 4 - CONTROLS AND FUNCTIONS

OPERATING INSTRUCTIONS cont’d USING HARD-WIRED MICROPHONES Any low inpedence, unbalanced, dynamic microphone can be plugged into the AUX MIC INPUT.

Page 5

MICROPHONE CHOICES M140 - This is the microphone supplied with the standard FM-AV4 system. It is a cardioid (directional) microphone for lavalier (&

Page 6 - M170 SERIES TRANSMITTERS

TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that yo

Page 7

ACCESSORIES AND REPLACEMENT PARTS ITEM DESCRIPTION CH-40 Battery Charger HM142V Single headband Headset Microphone HM152V Double headband Headset

Page 8 - SYSTEM SETUP

SPECIFICATIONS OVERALL FM-AV4 SYSTEM Operating frequency: 150 to 216 MHz Wireless operating range: Up to 750 feet FM deviation: + or - 15 KHz Dist

Page 9 - SYSTEM SETUP cont’d

SERVICE AND REPAIR If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repai

Page 10 - OPERATING TIPS

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

Page 11 - OPERATING INSTRUCTIONS

INTRODUCTION Thank you for selecting the FM-AV4 Portable Wireless Sound System. This system represents over 80 years of combined experience in the d

Page 12

GENERAL TECHNICAL DESCRIPTION The FM-AV4 Portable Wireless Sound System consists of an FM870 combination wireless receiver/amplifier/speak

Page 13 - MICROPHONE CHOICES

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

Page 14 - TROUBLESHOOTING

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

Page 15

M170 SERIES TRANSMITTERS Standard FM-AV4 systems include an M170 belt-pack transmitter which is designed to be used with a lavalier or h

Page 16 - SPECIFICATIONS

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

Page 17 - RETURNING UNITS FOR REPAIR

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

Page 18 - LIMITED ONE YEAR WARRANTY

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

Related models: FM-AV4

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