User manual UREI 1176LN

[. . . ] Soundcraft shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual. No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, electrical, mechanical, optical, chemical, including photocopying and recording, for any purpose without the express written permission of Soundcraft. Harman International Industries Limited Cranborne House Cranborne Road POTTERS BAR Hertfordshire EN6 3JN UK Tel: +44 (0)1707 665000 Fax: +44 (0)1707 660742 http://www. soundcraft. com 2 Table Of Contents SAFETY SYMBOL GUIDE IMPORTANT SAFETY INSTRUCTIONS 4 5 INTRODUCTION DESCRIPTION TYPICAL SPECIFICATIONS WARRANTY 7 7 8 11 INSTALLATION GENERAL PRECAUTIONS MAINS INSTALLATION INITIAL WIRING CONSIDERATIONS AUDIO WIRING SHIELDING POINTS TO REMEMBER WORKING SAFELY WITH SOUND INSPECTION AND INSTALLATION 13 13 13 14 14 14 15 15 16 BLOCK DIAGRAM OPERATING CONTROLS INPUTS HEADPHONE HOUSE, BOOTH AND TONE CONTROLS 22 23 23 24 24 OPTIONAL CONFIGURATIONS MICROPHONE GAIN ADJUSTMENT PHONO INPUT ON AUX 1, 2 AND/OR 3 MICROPHONE INPUT ON AUX 1, 2 AND/OR 3 AUX 4 INPUT : BYPASSING MASTER GAIN CONTROLS TONE CONTROL BYPASS 25 25 26 27 28 29 3 For your own safety and to avoid invalidation of the warranty please read this section carefully. SAFETY SYMBOL GUIDE For your own safety and to avoid invalidation of the warranty all text marked with these symbols should be read carefully. WARNINGS The lightning flash with arrowhead symbol, is intended to alert the user to the presence of un-insulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. CAUTIONS The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. NOTES Contain important information and useful tips on the operation of your equipment. [. . . ] Hum, buzz, instability and Radio Frequency interference can usually be traced to earth loops and inferior earthing systems. In some areas, especially heavily industrial areas, the incoming mains earth will not be adequate and a separate technical earth for all the audio equipment must be supplied. However, check with your local electricity supply company to ensure that safety regulations are not infringed or negated. The successful, hum free, installation of a system requires forethought, and the establishment of a set of ground rules, which must be consistently adhered to at all stages of installation. 13 INITIAL WIRING CONSIDERATIONS For optimum performance, it is essential for the earthing system to be clean and noise free, as all signals are referenced to this earth. A central point should be decided on for the main earth point system, and all earths should be 'star fed' from this point. It is common electrical practice to `daisy chain' the earths to all electrical outlets but this method is unsuitable for audio installations. The preferred method is to run an individual earth wire from each outlet, back to the system star point to provide a safety earth screen reference for each piece of equipment. A separate earth wire should also be run from each equipment rack and area, to the star point. This may or may not be used depending on circumstances, but it is easier to install in the first place, than later when problems arise. The location of the star point should be a convenient, easily accessible place, preferably at the rear of the console or in the main equipment rack. Install separate 'clean' and 'dirty' mains outlets, wired individually back to the incoming mains distribution box. Use the 'clean' supply for all audio equipment and the `dirty' supply for all lighting, etc. If necessary, to provide sufficient isolation from mains borne interference on the booth output, install an isolating transformer. In addition, the mains will also act as a carrier for many forms of RF interference generated by electric motors, air-conditioning units, thyristor light dimmers etc. Unless the earth system is clean, all attempts to improve hum noise levels will be futile. In extreme cases there will be no alternative but to provide a completely separate and independent `technical earth' to replace the incoming 'noisy earth'. However, always consult your local electricity supply authority to ensure that safety regulations are not being infringed. WORKING SAFELY WITH SOUND Although your new console will not make any noise until you feed it signals, it has the capability to produce sounds which when monitored through an amplifier or headphones can damage hearing. The table below is taken from the Occupational Safety & Health Administration directive on Occupational noise exposure (1926. 52): PERMISSABLE NOISE EXPOSURE DURATION PER DAY, HOURS 8 6 4 3 2 1. 5 1 0. 5 <0. 25 SOUND LEVEL dBA SLOW RESPONSE 90 92 95 97 100 102 105 110 115 Conforming to this directive will minimise the risk of hearing damage caused by long listening periods. A simple rule to follow is the longer you listen the lower the average volume should be. Please take care when working with your audio - if you are manipulating controls which you don't understand (which we all do when we are learning), make sure your monitors are turned down. Remember that your ears are the most important tool of your trade, look after them, and they will look after you. Most importantly - don't be afraid to experiment to find out how each parameter affects the sound - this will extend your creativity and help you to get the best results. Recommended Headphone Impedance >= 200 Ohms. 15 INSPECTION AND INSTALLATION UNPACKING AND INSPECTION Your Model 1176LN was carefully packed at the factory, and the container was designed to protect the unit from rough handling. Nevertheless, we recommend careful examination of the shipping carton and its contents for any sign of physical damage which could have occurred in transit. If damage is evident, do not destroy any of the packing material or the carton, and immediately notify the carrier of a possible claim for damage. [. . . ] There is one screw at the centre front of the top panel, and two others on the rear lug of the top panel. Be sure to replace all three screws when reinstalling the cover. 25 PHONO INPUT ON AUX 1, 2 AND/OR 3 Auxiliary inputs 1, 2 and 3 may be optionally equipped with Part No. To install these cards: 1) 2) Remove the three screws fastening the top cover of the 1176LN to the chassis, and remove the cover. Locate the selector switch to the left of the connector on the motherboard into which the new preamplifier card will be installed. [. . . ]