Lectrosonics H187 Operating Instructions And Troubleshooting Manual

Text of Lectrosonics H187 User Guide:

• Lectrosonics H187, 2 TABLE OF CONTENTS INTRODUCTION .................................................................................................. 2 GENERAL TECHNICAL DESCRIPTION ............................................................ 3 INSTALLATION ..................................................................................................... 4 FRONT PANEL DESCRIPTION........................................................................... 5 REAR PANEL DESCRIPTION ............................................................................. 6 OPERATING INSTRUCTIONS ............................................................................ 8 R

• Lectrosonics H187, 3 Plug-on Transmitter Rio Rancho, NM – USA GENERAL TECHNICAL DESCRIPTION The H187 transmitter is comprised of four major functional subsystems: the mic preamp/gain control, the compandor, the compressor/limiter and the RF transmitter (see block diagram below). The mic preamp is an ultra-low noise type op-amp. Aside from gain control, this stage also adds high frequency pre- emphasis to the audio signal. This insures highest signal-to-noise ratios under varying signal conditions. Gain control is semi-logarithmic to provide smooth gain control action. The compandor is a high quality audio device that processes the input signal such that large dynamic rang

• Lectrosonics H187, 4 CONTROLS AND FUNCTIONS The H187 may be used with a wide variety of microphones. The 3-pin XLR type connector on the H187 allows the transmitter to be used with any dynamic microphone, as well as many two wire positive bias lavalier systems (such as those systems supplied by Lectrosonics.) INPUT JACK Standard 3-pin Switchcraft XLR type. Pin 2 is signal, pin 3 is signal ground, and pin 1 is case ground (see schematic below). The H187 is self-locking onto a standard microphone. The XLR connector is permanently bonded to the metal collar, and is not normally repla

• Lectrosonics H187, 5 Plug-on Transmitter Rio Rancho, NM – USA MODULATION LEDS Indicate the proper setting of the MIC LEVEL control. LEVEL LED Flickers or glows all the time if the audio volume is adequate for normal operation. LIMIT LED Lights up when the audio volume is high, indicating that the signal level is being limited by the compressor. Optimum signal-to-noise ratio is obtained when the limit LED lights occasionally. MIC LEVEL Used to adjust the audio input volume for the proper modulation level. Rotate knob until the LEVEL LED flickers when there is an input signal. The LIMIT LED should light occasionally. TOP VIEW

• 6 OPERATING INSTRUCTIONS 1) Insert the H187 into the selected microphone. Listen for the “click” that indicates the H187 has locked on to the microphone. Pull on the mic to insure proper locking has occurred. 2) Turn the power switch to the “MUTE” position on both the transmitter and the receiver. The “MUTE” position allows internal voltages to stabil

• 7 Plug-on Transmitter Rio Rancho, NM – USA BATTERY REPLACEMENT The H187 transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY an ALKA- LINE battery for longest life. Standard zinc-carbon batteries marked “heavy duty” or “long-lasting” are not adequate. They will provide only about 4 hours of operation. Similarly,

• Lectrosonics H187, 8 TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter the red power LED on the transmitter panel should glow brightly. SYMPTOM POSSIBLE CAUSE TRANSMITTER BATTERY LED OFF 1) Battery is inserted backwards. 2) Battery is dead. NO TRANSMITTER MODULATION LEDs 1) Gain control turned all the way down. 2) Battery is in backwards. Check power LED. 3) Mic capsule is damaged or malfunctioning. NO SOUND IS HEARD AND 1) Transmitter not turned on. RECEIVER RF LAMP IS OFF 2) Transmitter battery is dead. 3) Receiver antenna missing or improperly positioned. 4) Transmitter and receiver not on same frequency. Check labels on t

• Lectrosonics H187, 9 Plug-on Transmitter Rio Rancho, NM – USA 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 intercon- necting cords and then go through the TROUBLE SHOOTING section in the manual We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose connec- tion, send the unit to the factory for repair and service. Don�

• Lectrosonics H187, 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 warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor. If Lectrosonics, I

More Instructions:

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