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 Harman International Company Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1441 USA Tel 781-280-0300 Fax 781-280-0490 www.lexicon.com 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. Customer Support Tel 781-280-0300 Fax 781-280-0495 (Sales) Fax 781-280-0499 (Service) Lexicon Part No.
Introduction Introduction Lexicon Section 1: Getting Started About the LX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . 1-2 Highlights US Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . .viii PT Desempacotando e Inspeção . . . . . . . . . . . . . . . . . . .viii DE Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . .viii Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 ES Desempaquetando e Inspección . . . . . . .
Introduction LX Power Amplifiers 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.
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 ................................................................
Getting Started 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.
Getting Started LX Power Amplifiers USING THE DOCUMENTATION LOCATION CONSIDERATIONS Refer to this documentation for assistance with installation and operation of the amplifier. Read all instructions and safety precautions. 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.
2 Basic Operation Front Panel Overview ....................................................................2-2 Rear Panel Overview .....................................................................2-4 Cooling System.............................................................................2-8 Protection Modes..........................................................................
Basic Operation Lexicon FRONT PANEL OVERVIEW 1 1. Standby Button Toggles the amplifier between on and standby. When the amplifer is on, pressing this button places it into standby and lights the red LED. When the amplifier is in standby, pressing this button powers it on. When powered on, the red standby LED will flash slowly until the amplifier begins outputting audio. When this occurs, the red standby LED will stop flashing and the blue channel status LEDs will light. This will take a few seconds.
Basic Operation LX Power Amplifiers 1 2 2. Channel Status LEDs will automatically resume outputting audio. See Section 3 for troubleshooting information. Indicate the status of each channel as follows: • Constant blue indicates normal operation. • Constant bright blue indicates a ≥1% distortion present in the audio signal. Reduce volume level to help eliminate potentially damaging audio signals from reaching the speakers.
Basic Operation Lexicon REAR PANEL OVERVIEW 6 9 8 3 4 5 WARNING 2-4 The LX-7 rear panel is pictured above. The LX-5 rear panel is pictured on page 2-6. Both are identical, except the LX-7 features two additional channels. External wiring connected to connectors marked with the symbol pictured at the right requires installation by an instructed person or the use of ready-made leads or cords.
Basic Operation LX Power Amplifiers 1. Power Switch 4. OUTPUT 1 to 7 (LX-7) or 1 to 5 (LX-5) Disconnects power to the AC Input Connector. Set this switch to off when making or breaking connections to the amplifier, or changing the setting of the MODE switch. 2. AC Input Connector The AC input connector provides power to the unit with the supplied power cord (3 conductor, 14AWG). Do not use an extension cord. For optimal performance, use an isolated power receptacle with adequate current (15 amps).
Basic Operation Lexicon REAR PANEL OVERVIEW (continued) 6 9 8 3 4 5 WARNING 2-6 The LX-5 rear panel is pictured above. The LX-7 rear panel is pictured on page 2-4. Both are identical, except the LX-7 features two additional channels. External wiring connected to connectors marked with the symbol pictured at the right requires installation by an instructed person or the use of ready-made leads or cords.
Basic Operation LX Power Amplifiers 5. MODE Switch (continued from page 2-5) Make sure the amplifier is powered off when the MODE switch setting is changed. INPUTs and OUTPUTs used in (BRIDGED) mode are labelled in parenthesis. Do not use the other INPUTs and OUTPUTs that are not labelled in parenthesis. Connect the positive speaker lead to the positive (red) OUTPUT of the first channel, and connect the negative speaker lead to the positive (red) OUTPUT of the second channel.
Basic Operation COOLING SYSTEM The LX Power Amplifiers use temperature controlled fans to exhaust heat. Heatsink temperatures are measured hundreds of times each second. Under most conditions, the fans are set to a slow speed. When the temperature climbs above 85˚C, the fans are set to a medium speed. When the temperature climbs above 100˚C, the fans are set to a high speed.
LX Power Amplifiers Basic Operation DC PROTECTION Each channel includes DC protection to prevent DC and frequencies below 10Hz from reaching the speakers. If this protection activates, the output relay will click off and the corresponding front panel channel status LED will no longer be lit. After approximately 4-seconds, DC protection will be automatically deactivated. The relay will click on and the corresponding channel status LED will light blue.
3 Troubleshooting and Maintenance Troubleshooting ............................................................................3-2 Maintenance .................................................................................
Troubleshooting and Maintenance TROUBLESHOOTING NO FRONT PANEL LEDs ARE LIT 1. Make sure the rear panel power switch is set to on. STANDBY LED IS FLASHING RAPIDLY 1. Power amplifier off. Allow amplifier to cool before powering it on again. 2. Check incoming line voltage. It should be 90V. NO AUDIO FROM ONE OR MORE CHANNELS, AND THE CHANNEL STATUS LED IS FLASHING RED 1. Reduce system volume level. 2. Power amplifier off. Allow amplifier to cool before powering it on again. A CHANNEL STATUS LED IS LIT RED 1.
LX Power Amplifiers Troubleshooting and Maintenance IF ALL ELSE FAILS . . . 1. Contact an authorized Lexicon dealer. 2. Contact Lexicon customer service. Note: Visit www.lexicon.com for answers to frequently asked questions and additional troubleshooting information. MAINTENANCE The following routine maintenance should be performed on a periodic basis: • Clean the exterior surfaces of the unit with a soft, dry, lint-free cloth.
A Appendix Specifications ................................................................................A-2 Declaration of Conformity ............................................................
Appendix Lexicon SPECIFICATIONS Audio Inputs Performance (continued) Other Trigger Input 12V DC +/- 10% Power 120V 60Hz 20A (Domestic) 230V 50Hz 12.5A (Export) LX-7 7 RCA, 7 XLR (including 1/4-inch Tip/Ring/Sleeve) Frequency Response 20Hz to 20kHz ±0.1dB 10Hz to 100kHz +0.5/-3dB LX-5 5 RCA, 5 XLR (including 1/4-inch Tip/Ring/Sleeve) THD Below 0.02%, 200W at 8Ω, all channels driven 20Hz to 20kHz Audio Outputs LX-7 LX-5 7 pairs of heavy-duty binding posts Signal-toNoise Ratio Height 5.
Appendix LX Power Amplifiers DECLARATION OF CONFORMITY Application of Council Directive(s): 89/336/EEC and 93/68/EEC Standard(s) to which Conformity is Declared: EN 55103-1:1995, EN 61000-3-2:1995+A14:2000, EN 61000-3-3:1995, EN 55022:1992, EN 55103-2:1996, and EN 60065:1998 Manufacturer: Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1441 USA The equipment identified here conforms to the Directive(s) and Standard(s) specified above.
I Index AC Input Connector . . . . . . . . . . . . . . . . . . . . . . .2-5 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 to A-3 Basic Operation . . . . . . . . . . . . . . . . . . . . .2-1 to 2-9 (BRIDGED) Mode . . . . . . . . . . . . . . . . . . . . . .2-5, 2-7 Channel Status LEDs . . . . . . . . . . . . . . . . . . . . . . .2-3 Connectors . . . . . . . . . . . . . . . . . . . . . . . . .2-4 to 2-7 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . .2-8 DC Protection . . .
LIMITED WARRANTY Lexicon, Inc. offers the following warranty on this product: What is the Duration of this Warranty? This warranty will remain in effect for three (3) years from the original date of purchase. Who is Covered? This warranty may be enforced by the original purchaser and subsequent owners during the warranty period, provided the original dated sales receipt or other proof of warranty coverage is presented at time of service.
Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1441 USA Tel 781-280-0300 Fax 781-280-0490 www.lexicon.com Customer Support Tel 781-280-0300 Fax 781-280-0495 (Sales) Fax 781-280-0499 (Service) Lexicon Part No.