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Summary of Contents for Lectrosonics FM-AV4
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Page 1: Introduction
FM-AV4 PORTABLE WIRELESS SOUND SYSTEM OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM... -
Page 2: Table Of Contents
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. -
Page 3: General Technical Description
"aux in" and "line out" jacks for external tape recorders. This allows the FM-AV4 to interface with other sound systems, video taping equipment or any type of "house" sound system. This versatility lets you use the wireless microphone, a hard-wired microphone, a tape recorder and the house sound system all at the same time. -
Page 4: Controls And Functions
ADJUST MIC GAIN ON TRANSMITTER UNTIL LIMIT LED FLASHES ON VOICE PEAKS LO-Z POWER LECTROSONICS (Items are listed in right to left order as shown on the panel above.) POWER: A toggle switch which turns the power off and on. - Page 5 MIC LEVEL OUTPUT: A 3-pin XLR audio connector which provides a balanced, low impedance (200 Ohm), 10 millivolt, microphone level output suitable for house sound systems, microphone mixers and other units requiring a microphone level input. Pin 1 is Ground or Shield, pin 2 is Audio High, and pin 3 is Audio Low. If using an unbalanced load, pin 1 is Ground, pin 2 is Audio and pin 3 is not used.
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Page 6: Transmitters
TRANSMITTERS Standard FM-AV4 systems include an M175 belt-pack transmitter which is designed to be used with a lavalier or headset microphone. If you have one of the other optional Lectrosonics transmitters, consult the supplied manual for that transmitter for the description and operating instructions. - Page 7 TRANSMITTERS cont’d The battery you use in the M175 Series transmitter should be a 9 Volt alkaline, available almost everywhere. An alkaline battery will provide up to 15 hours of operation. Carbon zinc batteries, even if marked "heavy duty" will only provide about 4 hours of operation. Make sure your batteries are marked "alkaline."...
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Page 8: System Setup
SYSTEM SETUP This section includes some basic steps that will ensure trouble-free operation of your FM-AV4 system: 1) Make sure the transmitter battery is good, or better yet, new. 2) Charge up the battery pack in the FM875 fully before you use the system. -
Page 9: Operating Tips
See below for more details on feedback. 8) The standard FM-AV4 system includes an M140 cardioid lavalier microphone. This directional microphone will minimize background noise and provide resistance to feedback when properly positioned on the user’s body. -
Page 10: Operating Instructions
OPERATING INSTRUCTIONS This section covers the initial adjustments to the FM875 and the companion transmitter that must be made before the system is placed into operation: 1) Connect the audio output cable as required. If you are connecting into a "house" sound system or external audio or recording equipment, make those connections before turning on the power. - Page 11 Set the AUX VOLUME at about "6" then adjust the volume control on your tape player to get the desired volume. Not all tape recorders will work with the FM-AV4. Low cost tape recorders may not have "line level" inputs and outputs required for quality recording and playback.
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Page 12: Microphone Choices
MICROPHONE CHOICES M140 - This is the microphone supplied with the standard FM-AV4 system. It is a cardioid (directional) microphone for lavalier ("lapel") use. Due to the directional pickup pattern, this model will generally provide more gain (loudness) before feedback than the M130 omni-directional model. The M140 has a "brighter"... -
Page 13: Troubleshooting
TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these steps in the sequence listed. SYMPTOM POSSIBLE CAUSE FM875 POWER LAMP NOT ON OR DIM 1) Power switch in OFF position 2) Batteries completely discharged 3) Battery connections loose... -
Page 14: Accessories And Replacement Parts
ACCESSORIES AND REPLACEMENT PARTS ITEM DESCRIPTION CH-40 Battery Charger Replacement HM142V Single headband With locking micro plug Headset Microphone HM152V Double headband With locking micro plug Headset Microphone M121S Dynamic Microphone For hand-held use plugged into the AUX MIC INPUT jack of the FM875 (cord not supplied). MC-16C Microphone Cord 16 ft. -
Page 15: Specifications
SPECIFICATIONS OVERALL FM-AV4 SYSTEM Operating frequency: 169 to 186 MHz Wireless operating range: Up to 750 feet ±15 KHz FM deviation: Distortion: less than 1% AMPLIFIER Audio power output: 9 Watts, RMS Amplifier freq. response: 50 Hz to 20 KHz Speaker: 8"... -
Page 16: Service And Repair
There are no adjustments inside that will make a malfunctioning unit start working. LECTROSONICS service department is equipped and staffed to quickly repair your equipment. In-warranty repairs are made at no charge in accordance with the terms of the warranty. Out of warranty repairs are charged at a modest flat rate plus parts and shipping. -
Page 18: Warranty
This warranty gives you specific legal rights. You may have additional legal rights which vary from state to state. LECTROSONICS, INC. 581 LASER ROAD RIO RANCHO, NM 87124 USA July 7, 1999...
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