Lexicon LX-5, LX-7 User Manual

User Guide

IMPORTANT SAFETY INSTRUCTIONS

1)Read these instructions.

2)Keep these instructions.

3)Heed all warnings.

4)Follow all instructions.

5)Do not use this apparatus near water.

6)Clean only with a dry cloth.

7)Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8)Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatuses that produce heat.

9)Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10)Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11)Only use attachments/accessories specified by the manufacturer.

12)Use only with a cart, stand, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13)Unplug this apparatus during lightning storms or when unused for long periods of time.

14)Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15)To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

This triangle, which appears on your component,		This triangle, which appears on your component,
alerts you to the presence of uninsulated,CAUTION		alerts you to important operating and
dangerous voltage inside the	-	maintenance instructions in this
voltage that may be sufficient to	RISK OF ELECTRIC SHOCK	accompanying literature.
constitute a risk of	DO NOT OPEN

A Harman International Company

Lexicon, Inc.

3 Oak Park

Bedford, MA 01730-1441 USA Tel [phone]

Fax [phone] www.lexicon.com

Customer Support

Tel [phone]

Fax [phone] (Sales)

Fax [phone] (Service)

Manufactured under license from Lucasfilm, Ltd. U.S. patent numbers 5,043,970; 5,189,703; and 5,222,059. Foreign patents pending. “Lucasfilm” and “THX” are registered trademarks of Lucasfilm, Ltd.

© 2001 Lexicon, Inc. All rights reserved.

This document should not be construed as a commitment on the part of Lexicon, Inc. The information it contains is subject to change without notice. Lexicon, Inc. assumes no responsibility for errors that may appear within this document.

Lexicon Part No. 070-14876 | Rev 0 | 09/01

133792-1

Introduction

Lexicon

Introduction
US	Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . .	viii
PT	Desempacotando e Inspeção . . . . . . . . . . . . . . . . . . .	viii
DE	Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . .	viii
ES	Desempaquetando e Inspección . . . . . . . . . . . . . . . . .	viii
FR	Déballer et Inspectión . . . . . . . . . . . . . . . . . . . . . . . .	viii
IT	Spacchettando ed Ispezione . . . . . . . . . . . . . . . . . . . .	viii

Section 1: Getting Started

About the LX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . 1-2

Highlights

Using the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

User Guide Symbols

Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Section 2: Basic Operation

Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Thermal Protection • DC Protection

Section 3: Troubleshooting and Maintenance

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3-3

Appendix

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Index

ii

LX Power Amplifiers

Introduction

US UNPACKING AND INSPECTION

After unpacking the unit, save all packing materials in case the unit ever needs to be shipped. Thoroughly inspect the modules and packing materials for signs of damage. Report any damage to the carrier at once; report equipment malfunction to the dealer.

PT DESEMPACOTANDO E INSPEÇÃO

Depois de desempacotar a unidade, economiza todos os materiais de embalagem no caso de você já precisa transportar a unidade. Completamente inspecione os módulos e empacotando materiais para sinais de dano. Informe qualquer dano imediatamente ao portador; mau funcionamento de equipamento de relatório para seu negociante.

DE AUSPACKEND UND INSPEKTION

Nach dem Auspacken der Einheit, außer allen Verpackung Materialien, falls Sie die Einheit je verschicken müssen. Inspizieren Sie die Bauelemente und packende Materialien gründlich für Zeichen von Schaden. Berichten Sie sofort irgendeinen Schaden zum Boten; Bericht-Ausrüstung-Funktionsstörung zu Ihrem Händler.

ES DESEMPAQUETANDO E INSPECCIÓN

Después de desempaquetar la unidad, ahorra todos los materiales del embalaje en caso de que usted alguna vez necesita enviar la unidad. Completamente inspeccione los módulos y condensando los materiales para las señales de daño. Informe cualquier daño en seguida al portador; el funcionamiento defectuoso de equipo de informe a su distribuidor.

FR DÉBALLER ET INSPECTIÓN

Après avoir déballé l'unité, sauve toutes les matières de l'emballage au cas où vous avez besoin jamais de transporter l'unité. Entièrement inspectez les modules et emballer des matières pour signes de dégât. Rapportez tout dégât au porteur à la fois; fonctionnement défectueux du matériel du rapport à votre revendeur.

IT SPACCHETTANDO ED ISPEZIONE

Dopo avere spacchettato l'unità, mai salvi tutti i materiali di imballaggio in caso che Lei ha bisogno di inviare l'unità. Completamente ispezioni i moduli e comprimendo materiali per segnali di danno. Subito riporti alcun danno al corriere; malfunzionamento di attrezzatura di rapporto al Suo rivenditore.

iii

	1
	Getting Started
About the LX Power Amplifiers	.....................................................1-2
Highlights
Using the Documentation.............................................................	1-3
User Guide Symbols
Product Registration......................................................................	1-3
Location Considerations................................................................	1-3

Getting Started

Lexicon

ABOUT THE LX POWER AMPLIFIERS

Thank you for purchasing an LX Power Amplifier. The LX amplifiers are designed to meet the highest standards of performance and sound quality. In addition, THX Ultra Certification ensures that the amplifiers meet the highest standards set forth by Lucasfilm’s Home THX division.

The LX amplifiers include many unique technologies that allow them to deliver exceptional performance, even under extreme operating conditions. The amplifiers feature Junction Temperature Simulation (JTS) advanced thermal protection. An internal JTS computer predicts internal temperatures and protects output transistors from overheating, allowing the amplifiers to achieve maximum performance with a minimum number of output transistors. This design enhances performance and reliability.

In addition to JTS, the LX amplifiers feature thermal protection for each channel and the main power transformer. The amplifiers also provide DC protection for each channel, preventing DC and frequencies below 10Hz from reaching the speakers.

The LX amplifiers offer high-power output that can be configured for almost any system. The LX-7 has seven 200W channels, and the LX-5 has five 200W channels. Both amplifiers can be bridged to provide as many as two 400W channels, in addition to the remaining 200W channels. Heavy-duty speaker outputs and selectable balanced or unbalanced audio inputs are also available.

A rear panel TRIGGER INPUT allows the LX amplifiers to be powered on and off by external devices. A GROUND LIFT switch helps eliminate audible hum caused by multiple grounding paths in the system.

Built to Lexicon standards, the LX Power Amplifiers establish a new benchmark for home theater amplifiers. An unbeatable combination of sound quality, power, flexibility, and reliability makes these amplifiers at home in virtually any system.

HIGHLIGHTS

•200W per channel

•Four custom designed, hand-graded output transistors per channel

•Bridgeable architecture for higher power output (400W at 8Ω)

•Oversized toroidal power transformer with extraordinarily low DC resistance and thermal protection

•High-power supply voltage (160V) for extra headroom at the outputs

•THX Ultra Certification

•Junction Temperature Simulation (JTS) to provide maximum performance from output transistors

•Thermal protection against overheating

•Speaker protection against DC and frequencies below 10Hz

•Protection against short circuits, device failures, miswiring, and internal faults

•Stable with mismatched, reactive, or unusual loads

•Quiet, microprocessor controlled, forced-air cooling to minimize chassis size

•Compatible with 2Ω speaker impedances (INDIVIDUAL Mode)

•Trigger input for power control from an external device

•RCA, XLR, and 1/4-inch Tip/Ring/Sleeve inputs

•Ground lift switch

•Heavy-duty gold plated outputs

•Multi-color channel status LEDs

•Rack-mount option available

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LX Power Amplifiers

Getting Started

USING THE DOCUMENTATION

Refer to this documentation for assistance with installation and operation of the amplifier. Read all instructions and safety precautions.

USER GUIDE SYMBOLS

The following symbols appear throughout this user guide:

	WARNING	Calls attention to a procedure, practice,
		condition or the like that, if not correctly
		performed or adhered to, could result in injury
		or death.
		Calls attention to a procedure, practice,
	CAUTION
		condition or the like that, if not correctly
		performed or adhered to, could result in
		damage to or destruction of part or all of the
		product.

LOCATION CONSIDERATIONS

The LX Power Amplifiers require care during installation to ensure optimal performance. The amplifiers should be installed in an equipment rack using an optional rack-mount kit available from Lexicon dealers or www.lexicon.com. Leave at least 2 inches of open space around the top, sides, and rear of the amplifier for proper ventilation.

			•	Be careful when moving the LX Power
		CAUTION
				Amplifers, which are quite heavy.
			•	Do not obstruct the ventilation holes in
				the chassis.

Note: Calls attention to information that is essential to highlight.

PRODUCT REGISTRATION

This LX Power Amplifier can be registered by returning the Product Registration card attached to the back cover of this user guide or by visiting www.lexicon.com. Please also retain the bill of sale, which represents proof of purchase and warranty.

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