Lectrosonics FM870 - Manual (Page 2)

INTRODUCTION
Thank you for selecting the FM-AV4 Portable Wireless Sound System. This system represents over 80
years of combined experience in the design of RF transmitters, receivers and Public Address systems. The
FM-AV4 sets new standards for operational convenience, flexibility and mechanical ruggedness. The built-
in wireless receiver, the rechargeable power supply and the high quality of the audio output set this system
apart from any other portable PA system on the market.
This manual covers the FM870 RECEIVER, optional microphones and transmitters.
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL TECHNICAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RECHARGEABLE BATTERIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONTROLS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
M170 SERIES TRANSMITTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SYSTEM SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MICROPHONE CHOICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ACCESSORIES AND REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . 15
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SERVICE AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
RETURNING UNITS FOR REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back cover
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