- DL manuals
- Lectrosonics
- Stereo System
- FM-AV4
- Operating Instructions Manual
Lectrosonics FM-AV4 Operating Instructions Manual
Summary of FM-AV4
Page 1
Fm-av4 portable wireless sound system operating instructions and trouble-shooting guide lectrosonics, inc. Rio rancho, nm.
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 ru...
Page 3
General technical description the fm-av4 portable wireless sound system consists of an fm875 combination wireless receiver/amplifier/speaker with a rechargeable battery pack, an m175 belt-pack transmitter and a microphone. Optional microphones, transmitters and accessories are available. These items...
Page 4
Controls and functions 10 0 2 4 6 8 modulation rf –20 limit wireless mic volume out in power charge mic level output lectrosonics lo-z bal in/out omni–bus 10 0 2 4 6 8 charge until green led goes out or longer adjust mic gain on transmitter until limit led flashes on voice peaks 1 2 3 aux volume in ...
Page 5
Mic level output: line out: 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, an...
Page 6
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 instructi...
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 yo...
Page 8
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. 3) the internal antenna is built into the c...
Page 9
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 transmitters at the same time with a single fm875. You will need to "alternate" back and forth between the transmitters. Failure to do so will result in ...
Page 10
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 ...
Page 11
Operating instructions cont’d using hard-wired microphones any unbalanced, dynamic microphone can be plugged into the aux mic input. 1) make sure the volume knobs are set at "0." 2) plug an auxiliary cord (a mm-16 or mc-16c will work) into your microphone and into the mic or aux in. 3) flip the swit...
Page 12
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-directiona...
Page 13
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 dischar...
Page 14
Accessories and replacement parts item description ch-40 battery charger hm142v single headband headset microphone hm152v double headband headset microphone m121s dynamic microphone mc-16c microphone cord mm-16 microphone cord mm-36 audio patch cord rk-51 wind screen rk-119 wind screen rk-142 wind s...
Page 15
Specifications overall fm-av4 system operating frequency: 169 to 186 mhz wireless operating range: up to 750 feet fm deviation: ±15 khz distortion: less than 1% amplifier audio power output: 9 watts, rms amplifier freq. Response: 50 hz to 20 khz speaker: 8" full range cone audio outputs: xlr - 200 o...
Page 16
Service and repair if your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check out the inter-connecting cords and then go through the trouble sho...
Page 18
Limited one year warranty the equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warr...