Lectrosonics M185 User Manual

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M185
BELT-PACK TRANSMITTER
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
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Summary of Contents

Page 1 - LECTROSONICS, INC

M185 BELT-PACK TRANSMITTER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM

Page 2 - TABLE OF CONTENTS

SPECIFICATIONS AND FEATURES Operating frequencies: 150 to 216 MHz RF Power output: 50 mW Deviation: ±15 kHz (max) Spurious radiation: 55 dB below

Page 3

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

Page 4 - CONTROLS AND FUNCTIONS

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 5

INTRODUCTION Thank you for selecting the Lectrosonics M185 transmitter. This transmitter represents over 70 years of combined experience in the desi

Page 6 - BATTERY REPLACEMENT

GENERAL TECHNICAL DESCRIPTION The M185 transmitter is comprised of four major functional subsystems: the input compressor, the mic preamp/gain contr

Page 7

CONTROLS AND FUNCTIONS LECTROSONICS M185 ON MUTE OFF LEVEL LIMIT MIC LEVEL Figure 2 - M185 Front Panel INPUT JACK The input on the M185 accommodates

Page 8 - M185 INPUT JACK WIRING

CONTROLS AND FUNCTIONS (cont’d) Since the internal circuits are all tightly regulated and the RF output stage has a separate discrete regulator, the

Page 9 - TROUBLESHOOTING

BATTERY REPLACEMENT The M185 transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY an ALKALINE battery for

Page 10 - SPECIFICATIONS AND FEATURES

OPERATING INSTRUCTIONS 1) Insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in. 2) Turn the power s

Page 11 - RETURNING UNITS FOR REPAIR

M185 INPUT JACK WIRING The wiring diagrams shown on the attached sheet represent the basic wiring necessary for the most common types of microphones

Page 12 - May 12, 1994

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

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