Instruction/ maintenance manual of the product 070-14876 Lexicon
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LX Po wer Amplif ier User Guide.
IMPOR T ANT SAFETY INSTR UCTIONS 1) Read these instructions. 2) K eep these instructions. 3) Heed all warnings. 4) Follo w all instructions. 5) Do not use this apparatus near water . 6) Clean only with a dr y cloth. 7) In CE countries, this amplifier is considered “prof essional equipment.
DOCUMENT A TION CONVENTIONS This document contains general saf ety , installation, and operating instructions for the LX-5 and LX-7 P ower Amplifiers. It is im por tant to read this user guide before attempting to use these products . Pa y par ticular attention to safety instructions.
ii Introduction Lexicon Introduction Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . .iii Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . . .iii Desempaquetando e Inspección . . . . . . . . . . . . . . . . . .iii Déballer et Inspectión .
iii Introduction LX Power Amplifiers UNP ACKING 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 .
1 Getting Started About the LX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Highlights Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started Lexicon 1-2 ABOUT THE LX POWER AMPLIFIERS Thank you for purchasing an LX Power Amplifier , a reference-qual- ity amplifier designed to meet the highest standards of power and performance under even the most extreme operating conditions.
PRODUCT REGISTRA TION Please register the LX Power Amplifier within 15 days of purchase. To do so, register online at www .lexicon.com or complete and return the product registration card attached to the back cover of this user guide. The product registration card serves no warranty purposes.
2 Basic Operation Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Operation Lexicon 2-2 FRONT P ANEL OVERVIEW 1 2 1. Standby Button Activates and deactivates standby mode when the LX amplifier is powered on with the rear panel power switch. The standby button performs no function when the LX amplifier is powered off with the rear panel power switch.
Basic Operation LX Power Amplifiers 2-3 1 2 2. Channel Status LEDs Provide at-a-glance view of the status of each channel as indicated in the table below: Note: When the main power transformer tempera.
Basic Operation Lexicon 2-4 REAR P ANEL OVERVIEW The LX-7 rear panel is shown above. The LX-5 r ear panel is shown on page 2-6. The rear panels ar e similar , except the LX-7 amplifier includes two additional channels.
Note: If the rear panel MODE switch is set to INDIVIDUAL, speakers must have impedance ratings of 2 Ω or higher . If set to (BRIDGED), speakers must have impedance ratings of 4 Ω or higher . Using speakers with lower than recommended impedance ratings might activate protection modes.
Basic Operation Lexicon 2-6 REAR P ANEL OVERVIEW (continued) The LX-5 rear panel is shown above. The LX-7 r ear panel is shown on page 2-4. Both are similar , except the LX-7 features two additional channels.
Basic Operation LX Power Amplifiers 2-7 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 other INPUT s and OUTPUT s that are not labelled in parenthesis.
Basic Operation Lexicon 2-8 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.
Basic Operation LX Power Amplifiers 2-9 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 open and the corresponding front panel channel status LED will no longer be lit.
3 Tr oubleshooting & Maintenance T roubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tr oubleshooting & Maintenance Lexicon 3-2 TROUBLESHOOTING No front panel LEDs are lit. 1. Make sure the unit is plugged in and the rear panel power switch is set to on. The Standby LED is flashing rapidly . 1. Power the amplifier off. Allow the amplifier to cool before powering it on again.
Tr oubleshooting & Maintenance LX Power Amplifiers 3-3 The amplifier and other electrical devices in the listening room suddenly lose power . 1. Reset the cir cuit breakers for the affected device(s). If all else fails . . . 1. Contact an authorized Lexicon dealer .
A Appendix Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Declaration of Conformit y . . . . . . . . . . . . . . . . . . . . . . . .
Amplifier performance specifications are identical in INDIVIDUAL and (BRIDGED) Modes, with the exception of Output Power and Minimum Speaker Impedance.
Appendix LX Power Amplifiers A-3 Other (Continued) W eight LX-7 LX-5 • 56lbs (25.4kg) • 52lbs (23.6kg) Rack Mounting Optional brackets are available for mounting either amplifier in stan- dard 9-i.
Appendix Lexicon A-4 Application of Council Directive(s): 89/336/EEC and 93/68/EEC Standard(s) to which Conformity is Declared: EN 55103-1:1995, EN 61000-3-3:1995, EN 55022:1992 (Class B), EN 55103-2:1996, and EN 60065:1998 Manufacturer: Lexicon, Inc.
Index I (BRIDGED) Mode . . . . . . . . . . . . . . . . . . . . . .2-5, 2-7 AC Input Connector . . . . . . . . . . . . . . . . . . . . . . .2-5 AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7 BAL/UNBAL Switch . . . . . . . . . . .
Lexicon, Inc. 3 Oak P ark Bedford, MA 01730-1413 USA Te l 781-280-0300 Fa x 781-280-0490 www .lexicon.com Customer Support Te l 781-280-0300 Fa x 781-280-0495 (Sales) Fa x 781-280-0499 (Service) LIMITED W ARRANTY Lexicon, Inc.
Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1413 USA Te l 781-280-0300 Fa x 781-280-0490 www .lexicon.com Customer Support Te l 781-280-0300 Fa x 781-280-0495 (Sales) Fa x 781-280-0499 (Service) Lexicon P ar t No.
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If you already are a holder of Lexicon 070-14876, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lexicon 070-14876.
However, one of the most important roles played by the user manual is to help in solving problems with Lexicon 070-14876. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lexicon 070-14876 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
