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Summary of Contents for Lectrosonics LCA16
- Page 1 LCA16 LOGIC CONTROLLED AMPLIFIER* OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM * US PATENT NUMBER 5204908...
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Page 2: Table Of Contents
APPENDIX 1 - POWER LOSS vs CABLE RUN ....15 APPENDIX 2 - LCA16 SYSTEM WORKSHEET ....16... -
Page 3: General Technical Description
GENERAL TECHNICAL DESCRIPTION In the following illustration is a simplified block diagram of the LCA16 showing one amplifier channel. All channels are identical. The audio input of the LCA16 is an RF filtered, electronically balanced differential amplifier. An AUDIO THRU output is provided so the audio signal can be "daisy chained"... -
Page 4: Controls And Functions - Front Panel
CONTROLS AND FUNCTIONS - FRONT PANEL POWER SWITCH Controls the application of AC power to the LCA16. POWER LED Indicates the presence of AC power to the LCA16. MAIN LEVEL Controls the overall output level of the sound system. SIGNAL PRESENT LED Indicates the presence of audio signal to the LCA16. - Page 5 7 and 8. SWITCH NUMBERS ATTENUATION CONTROL POTS DIP SWITCHES 1 1 O 1 3 N POWER SIGNAL POWER PRESENT ATTENUATION LEVEL ATTENUATION LEVEL ATTENUATION LEVEL ATTENUATION LEVEL MAIN LEVEL LECTROSONICS, INC LOGIC CONTROLLED AMPLIFIER. Figure 3 - Dip Switch Detail...
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Page 6: Controls And Functions - Rear Panel
L C A 1 6 OU TP U T MOD U L E RI O RA NCHO , NM MADE IN USA L C A 1 6 OU T P U T MOD UL E Figure 5 - LCA16 Rear Panel... -
Page 7: Pre-Configuring The Lca16 Prior To Installation
This procedure should be performed prior to installation. The LCA16 SYSTEM WORKSHEET (Appendix 2) will assist you in setting up the LCA16 before going on site. While the actual setup is quite simple, it is recommended that you use this worksheet, especially if this is your first installation using the LCA16 Logic Controlled Amplifier. - Page 8 STEP 5 - Setting the DIP switches Upon completion of the chart you will have a grid which can now be used for setting the DIP switches on the LCA16. See Example 2 below. Each speaker output on the LCA16 has a set of dip switches on the front panel.
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Page 9: Pre-Configuring The Lca16 Prior To Installation
LCA16. Repeat this step for each group of microphones. STEP 4 - Assigning Attenuation Levels. In this step you will be noting in each box how much the speakers need to be attenuated. - Page 10 STEP 5 - Setting the DIP switches Upon completion of the chart you will have a grid which can now be used for setting the DIP switches on the LCA16. See Example 4 below. Each speaker output on the LCA16 has a set of DIP switches on the front panel.
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Page 11: Installation
3 is audio "cold" (-), and pin 1 is ground (shield). If an unbalanced source is used for audio input, connect the source ground to pins 1 and 3 at the LCA16, and source "hot" to pin 2. The use of a two-wire plus shield cable is recommended, with the shield left unconnected at the source end and connected to signal ground at the LCA16 end regardless of whether the source is balanced or unbalanced. - Page 12 L I N E O U T L I N E O U T EXT ERN AL 120V AC 200 WATTS LECTROSONICS, INC. AM 4 AM 4 AMPLIFIER L CA 1 6 O U T P U T M O D UL E...
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Page 13: System Adjustment
The final adjustment of this first speaker zone will provide a setting for the LCA16 MAIN LEVEL control. Once the MAIN LEVEL control is set for the first speaker zone, it should be left alone for adjustment of the rest of the speaker zones. -
Page 14: Specifications
SPECIFICATIONS Audio Input: Connectors: 3-pin female XLR, electronically balanced and RF filtered Impedance: 20K Ohms balanced, 10K Ohms unbalanced Max Input Level: +8dBv Thru Output: Connectors: 3-pin male XLR, parallel with Audio Input Logic Input: Connectors: Terminal Strip Impedance: 100K Ohms in parallel with 2.2uF pulled up to +5 volts Speaker Output: Connectors: Terminal Strip... -
Page 15: 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 16: Appendix 1 - Power Loss Vs Cable Run
APPENDIX 1 - POWER LOSS vs CABLE RUN The table below indicates power loss vs cable run for various wire gauges. Nominal output power for the LCA16 is 5 watts at 4 ohms and 3 watts at 8 ohms. 22 AWG Wire, 4 ohm load... -
Page 17: Appendix 2 - Lca16 System Worksheet
APPENDIX 2 - LCA16 SYSTEM WORKSHEET DIPSWITCH SETTINGS SPEAKER 10 11 12 13 14 15 16... -
Page 18: Warranty
This warranty applies only to items returned to us, shipping costs prepaid, within one year from the date of purchase. 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 6, 1999...
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