Lexicon 2020AD User Guide Rev2

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Lexicon Copyright © 1994 Lexicon Inc. 100 Beaver Street Waltham MA 02154-8441 USA 617-736-0300 Fax: 617-891-0340 All Rights Reserved This publication is protected by copyright and all rights are reserved. No part of it may be reproduced or transmitted by any means or in any form, without express prior consent in writing from Lexicon. Precautions The 20/20 AD is a rugged device with extensive electronic protection. However, you should observe the same reasonable precautions that apply to any piece of audio equipment: - Always use the correct line voltage. - Do not install the 20/20 AD in a closed, unventilated rack, or directly above heat-producing equipment such as power amplifiers. - Never attach audio power amplifier outputs (speaker outputs) directly to any of the 20/20 AD's connectors. - To prevent fire or shock hazard, do not expose the 20/20 AD to rain or moisture. This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designated to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment OFF and ON, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient the receiving antenna Relocate the computer with respect to the receiver Move the computer away from the receiver Plug the computer into a different outlet so that the computer and receiver are on different branch circuits. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: "How to identify and Resolve Radio/TV Interference Problems." This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000- 00345-4. Notice This triangle, which appears on your component, alerts you to the presence of uninsulated, dangerous voltage inside the enclosure...voltage that may be sufficient to constitute a risk of shock. CAUTION This triangle, which appears on your component, alerts you to important operating and main- tenance instructions in this ac- companying literature. RISK OF ELECTRIC SHOCK DO NOT OPEN Printed in the United States of America Lexicon Part # 070-09090 Rev 2

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20/20 AD User Guide SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation, service and repair of this instrument. Failure to comply with these precautions, or with specific warnings elsewhere in these instructions violates safety standards of design manufacture and intended use of the instrument. Lexicon assumes no liability for the customer's failure to comply with these requirements. General definitions of safety symbols used on equipment or in manuals. Instruction manual symbol: the product will be marked with this symbol when it is necessary for the user to refer to the instruction manual in order to protect against damage to the instrument. Indicates dangerous voltage. (Terminals fed from the interior by voltage exceed- ing 1000 volts must be so marked.) The WARNING sign denotes a hazard. It calls attention to a procedure, practice, condition or the like which, if not correctly performed or adhered to, could result in injury or death to personnel. The CAUTION sign denotes a hazard. It calls attention to an operating procedure, practice, condition or the like which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. The NOTE sign denotes important infor- mation. It calls attention to procedure, practice, condition or the like which is essential to highlight. GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cabi- net must be connected to an electrical ground. The instru- ment is equipped with a three-conductor AC power cable. The power cable must either be plugged into an approved three-contact electrical outlet or used with a three-contact to two-contact adapter with the grounding wire (green) firmly connected to an electrical ground (safety ground) at the power outlet. The power jack and mating plug of the power cable meet International Electrotechnical Commission (IEC) safety standards. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard. KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified maintenance personnel. Do not replace components with power cable connected. Under certain conditions, dangerous voltages may exist even with the power cable removed. To avoid injuries, always disconnect power and discharge circuits before touching them. DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present. DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. DANGEROUS PROCEDURE WARNINGS Warnings, such as the example below, precede potentially dangerous procedures throughout this manual. Instructions contained in the warnings must be followed. Dangerous voltages, capable of causing death, are pres- ent in this instrument. Use extreme caution when han- dling, testing and adjusting. SAFETY SYMBOLS WARNING WARNING NOTE: CAUTION Electrostatic Discharge (ESD) Precautions The following practices minimize possible damage to ICs resulting from electrostatic discharge or improper inser- tion. - Keep parts in original containers until ready for use. - Avoid having plastic, vinyl or styrofoam in the work area. -. Wear an anti-static wrist-strap. - Discharge personal static before handling devices. - Remove and insert boards with care. - When removing boards, handle only by non-conductive surfaces and never touch open-edge connectors ex- cept at a static-free workstation.* - Minimize handling of ICs. -. Handle each IC by its body. - Do not slide ICs or boards over any surface. - Insert ICs with the proper orientation, and watch for bent pins on ICs. - Use anti-static containers for handling and transport. *To make a plastic-laminated workbench anti-static, wash with a solution of Lux liquid detergent, and allow to dry without rinsing. CAUTION