Lexicon 070-14876 Stereo Amplifier User Manual
Contents
1. EL te pi I I v 4 gt W k h a LU v N I Ch i ab amp _ id 2 4 H A Harman International Company IMPORTANT SAFETY INSTRUCTIONS 1 O uU Pp UI N 7 8 9 10 11 12 13 14 15 M 16 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth In CE countries this amplifier is considered professional equipment In order to comply with CE requirements the customer is required to obtain permission from the local supply authority before connecting this equipment Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatuses that produce heat 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 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified2. It should not be more than 1096 below the mains supply voltage indicated in the Specifications page A 2 One or more channels is not passing audio and the corresponding channel status LED is flashing red l Reduce system volume level 2 Power the amplifier off Allow the amplifier to cool before powering it on again A channel status LED is lit red 1 Contact an authorized Lexicon dealer or Lexicon customer Service The standby button does not appear to be functioning 1 Make sure the rear panel power switch is set to on 2 Make certain the rear panel TRIGGER INPUT switch is set to OFF 3 2 Lexicon One or more channels is not passing audio but the corresponding channel status LED is lit blue 1 Make sure the UN BAL BAL switch is set to the connector being used UNBAL for RCA and BAL for 1 4 inch or XLR 2 Reduce system volume level Audio sounds out of phase l Powerthe amplifier off with the rear panel power switch M ake sure the MODE switch is set to the current configuration 2 Check to ensure proper speaker wiring A humming sound is present in the audio l Setthe GROUND LIFT switch to ON One or more channels is outputting distorted sound l Reduce system volume level 2 Checkthe airflow around the amplifier and take the following measures e Provide additional cooling e Make sure speakers have adequate impedance ratings see page 2 5 The TRIGGER INPUT is connected to an
3. times With THX Ultra Certification the LX amplifiers are certified to meet the highest THX standards Advanced thermal DC and speaker protection further guarantee an exceptional performance under even the most extreme operating conditions Add to this incredible power and wide ranging flexibility and the LX amplifiers are at home in the most sophisticated and demanding home theaters LX Power Amplifiers HIGHLIGHTS 200W per channel Four custom designed hand graded output transistors per channel Bridgeable architecture for higher power output 400W at 89 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 262 speaker impedances Individual M ode 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 Ge
4. 5 2 6 2 7 3 2 Inspection InstructionS iii Junction Temperature Simulation JTS LEDs Channel Status Limited Warranty Installation Considerations LX Power Amplifiers About Male Cable End XLR 2 5 Illustration Power Outage Product Registration Protection M odes RCA Connectors 2 4 to 2 7 3 2 2 4 Illustration 2 6 Illustration Index Registration Product 1 3 Safety Instructions Inside Front Cover i iii 1 3 2 4 2 6 2 7 SpecificationS uc we ee ee OR OR S Ch d ed A 2 Standby Button 2 2 2 3 2 5 2 7 2 8 3 2 Table of Contents ii Thermal Protection 2 8 Tip Ring Sleeve CableEnd 2 5 Illustration Tip Ring Sleeve Connectors 2 5 2 7 TRIGGER INPUT 2 7 3 2 TRIGGER INPUT Switch 2 7 3 2 Troubleshooting 3 2 to 3 3 UNBAL BAL Switch 2 5 2 7 3 2 Unpacking Instructions iii War SIL PA Inside Back Cover XLR Connectors 2 5 2 7 3 2 XLR Male Cable End 2 5 Illustration 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 five 5 years from the original date of purchase Who is Covered This warranty may be enforced by
5. However the standby LED still functions normally When set to DELAY the normal 5 second power on delay is extended to approximately 7 seconds The TRIGGER INPUT Switch setting will not take effect until the amplifier has been power cycled 2 7 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 PROTECTION MODES The LX amplifiers are equipped to protect against overheating and miswiring as well as electrical failures such as short circuits device failures internal faults and DC output to the speakers A combination of dedicated circuitry and microprocessor control ensures that the amplifier will perform safely and reliably under extreme conditions THERMAL PROTECTION JTS Junction Temperature Simulation provides an advanced level of thermal protection that allows the LX amplifiers to achieve maximum performance with a minimum number of output transistors This design requires a smaller quantity of high quality output transistors enhancing performance and reliability JTS predicts the internal temperatures of output transistors to prevent them from overheating To arrive at an accurate internal temper
6. alle Bestandteile auf Besch digung Verstandigen Sie sofort den Spediteur falls die Verpackung und oder die Bestandteile der Lieferung beschadigt sind Verstandigen Sie sofort Ihren Handler falls das Ger t nicht richtig funktioniert 4 DESEMPAQUETANDO E INSPECCI N Despu s de desempaquetar la unidad ahorra todos los materiales del embalaje en caso de que usted alguna vez necesita enviar la unidad Completamente inspeccione los m dulos y condensando los materiales para las se ales de da o Informe cualquier da o en seguida al portador el funcionamiento defectuoso de equipo de informe a su distribuidor um D BALLER ET INSPECTI N Apres avoir d ball l unit sauve toutes les mati res de l emballage au cas oU vous avez besoin jamais de transporter l unit Enti rement inspectez les modules et emballer des mati res pour signes de degat Rapportez tout degat au porteur a la fois fonctionnement d fectueux du mat riel du rapport votre revendeur KD SPACCHETTANDO ED ISPEZIONE Dopo avere spacchettato l unit mai salvi tutti i materiali di imballaggio in caso che Lei ha bisogno di inviare l unit 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 FD DESEMPACOTANDO E INSPECAO Depois de desempacotar a unidade economiza todos os materiais de embalagem no caso de voc j precisa tr
7. ansportar a unidade Completamente inspecione os m dulos e empacotando materiais para sinais de dano Informe qualquer dano imediatamente ao portador mau funcionamento de equipamento de relat rio para seu negociante 1 A Getting Started About the LX Power AmpliflerS RR RI I RR RH 1 2 Highlights Product ROOISCEOUOPI L pote uma wa head ee a OCHOA EURO A dra aed 1 3 Installation Considerations Getting Started 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 Equipped with advanced thermal DC and speaker protection the LX amplifiers deliver reliable and exceptional performance with most loudspeakers including mismatched reactive and unusual loads In addition the LX amplifiers include protection against short circuits component failures miswiring and internal faults Available in five or seven channel versions the LX amplifiers deliver high power performance Each 200 Watt channel includes four custom designed hand graded output transistors as well as a 160 volt power supply for extra headroom Bridgeable architecture allows the first four 200 Watt channels to be configured with up to two 400 Watt channels for even higher power output Non bridged channels are compatible with speaker impedances of 2 and above and
8. ature prediction JTS measures the output voltage and current each output transistor delivers and combines this informa tion with heatsink temperatures When an output transistor reaches its maximum allowable temperature it is instantly restrict ed until the temperature decreases Lexicon JTS s dynamic nature enables it to avoid the problems inherent in competing products that rely only on heatsink temperatures Heatsink temperatures do not always correlate to the temperatures inside the output transistors JTS is calibrated by device parameters which allow it to predict overheating even if the heatsinks are relatively cool When JTS activates a distorted signal will be present in the corresponding channel Check the airflow around the amplifier and take the following measures e Provide additional cooling e Make sure speakers have adequate impedance ratings see page 2 5 e Reduce system volume level In addition to the protection provided by JTS the amplifier includes thermal protection for each channel and the main power transformer If a heatsink temperature exceeds 115 C the channel will deactivate and the corresponding channel status LED will flash red When the heatsink cools below 115 C the channel will automatically reactivate and the corresponding channel status LED will light blue If the main power transformer temperature exceeds 110 C the transformer will deactivate all channel status LEDs will no longer be l
9. bridged channels are compatible with speaker impedances of 422 and above Complemented by the heavy duty gold plated speaker output connectors the rear panel includes selectable balanced or unbal anced audio input on RCA and XLR or 1 4 inch Tip Ring Sleeve connectors A trigger input connector allows the LX amplifiers to be controlled with associated components such as the MC 12 or MC 8 Digital Controller In addition a ground lift switch can be used to eliminate audible hum caused from multiple grounding paths The LX amplifiers feature a Junction Temperature Simulation JTS computer that predicts the internal temperature of each output transistor to prevent overheating Unlike similar technologies JTS combines the output voltage and current of each output transistor Lexicon with heatsink temperatures to arrive at an accurate internal tem perature prediction As a result JTS prevents overheating even when heatsink temperatures are relatively cool allowing the LX amplifiers to achieve maximum performance and reliability from the output transistors In addition to JTS the LX amplifiers include advanced thermal and DC protection for each channel Thermal protection automatically deactivates channels exceeding 115 C while DC protection pre vents DC and frequencies below 10Hz from reaching the speakers Dedicated multi colored channel status LEDs are located on the front panel to provide at a glance viewing of channel status at all
10. by the manufacturer 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 Unplug this apparatus during lightning storms or when unused for long periods of time 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 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 C AUTI O N alerts you to important operating and dangerous voltage inside the enclosure maintenance instructions in this voltage that may be sufficient to RISK OF ELECTRIC SHOCK accompanying literature constitute a risk of shock DO NOT OPEN lexicon H A Haman Intemational Company Lexicon Inc 3 Oak Park Bedford MA 01730 1441 USA Tel 781 280 0300 Fax 781 280 0490 vwwvlexicon com Customer Support Tel 781 280 0300 Fax 781 280 0495 Sales Fax 781 280 0499 Service Lexicon Part No 070 14876 Rev3 03 03 DOCUMENTATION CONVENTIONS This do
11. cted to the corresponding audio outputs When using the unbalanced RCA audio inputs make sure the UNBAL BAL switch located to the left of each XLR connector is set to UNBAL When using the balanced XLR or 1 4 inch tip ring sleeve audio inputs make sure the UNBAL BAL switch is set to BAL The illustrations below show the appropriate cable ends for 1 4 inch T R S and XLR connectors Tip Sleeve Tip Positive Ring Negative Sleeve Ground Ring 2 Positive Male Cable End 3 Negative 1 Ground Basic Operation 4 OUTPUT 1 to 7 LX 7 or 1 to 5 LX 5 Provide audio output for the speakers OUTPUT connectors can accept bare speaker wires banana plug connectors or certain spade connectors When using bare speaker wires loosen the connector insert the wire into the top of the receptacle then tighten the connector The same procedure should be used for spade connectors Banana plugs should be inserted into the outward facing receptacle Use heavy gauge speaker cable to ensure low impedance connections between the amplifier and the speakers Observe correct speaker polarity WARNING Po not connect the OUTPUTS of one channel to the OUTPUTS of other channels or to other amplifiers Note If the rear panel M ODE switch is set to INDIVIDUAL speakers must have impedance ratings of 292 or higher If set to BRIDGED speakers must have impedance ratings of 492 or higher Using speakers with lower than recommended imp
12. cument contains general safety installation and operating instructions for the LX 5 and LX 7 Power Amplifiers It is important to read this user guide before atterrpting to use these products Pay particular attention to safety instructions The following symbols are used in this document Appears on the component to indicate the presence of uninsulated dangerous voltage inside the endosure voltage that may be sufficient to constitute a risk of shock Calls attention to a procedure practice condition or the like that if not correctly performed or adhered to could result in injury or death WARNING Calls attention to a procedure practice condition or the like that if not correctly performed or adhered to could result in darrage to or destruction of part or all of the product Note Calls attention to information that is essential to highlight Manufactured under license from Lucasfilm Ltd Lucasfilni and THX are trademarks or registered traderrarks of Lucasfilm Ltd 2003 Lexicon Inc All rights reserved This document should not be construed as a commitment on the part of Lexicon Inc The infomation it contains is subject to change without notice Lexicon Inc assumes no responsibility for errors that may appear within this document Introduction Lexicon Introduction Section 1 Getting Started About the LX Power Amplifiers 1 2 Qm Unpacking and Inspection a i A SNNN E Auspackend und I
13. ding posts Performance Amplifier performance specifications are identical in INDIVIDUAL and BRIDGED Modes with the exception of Output Power and Minimum Speaker Impedance BRIDGED Mode includes channels 1 amp 2 and 3 amp 4 only Output Power e 200W at 89 all channels driven 20HZz to 20kHz 400W at 89 Bridged Signal to Noise Ratio Lexicon Performance Continued 111dB 22kHz bandwidth balanced inputs 109dB 22kHz bandwidth unbalanced inputs Ref 200W at 82 IM Distortion e Below 0 03 at 200W 89 Crosstalk 80dB at 1kHz minimum Damping Factor e 250 at 20Hz minimum Minimum 20 INDIVIDUAL Mode Speaker 40 BRIDGED Mode Impedance Frequency e 20Hz to 20kHz 30 1dB Response e 10Hz to 100kHz 0 5 3dB THD Below 0 02 at 200W 82 all channels driven 20HZz to 20kHz Input Sensitivity e 2V in for 100W out at 82 balanced inputs e 1V in for 100W out at 80 unbalanced inputs Input Impedance e 20kQ balanced e10kQ unbalanced Gain Trigger Input e23 dB balanced 29dB unbalaced e 12V DC 10 Power Requirements e 120V 60Hz 20 Domestic e 230V 50Hz 12 5A Export LX Power Amplifiers Appendix Other Continued Weight DC7 56lbs 25 4kg LX 5 52lbs 23 6kg Rack Mounting Optional brackets are available for mounting either amplifier in stan dard 9 inch equipment rac
14. ection 3 for troubleshooting information Note When the main power transformer temperature exceeds 110 C e the transformer will deactivate ethe channel status LEDs will no longer be lit ethe standby LED will flash rapidly Basic Operation Lexicon REAR PANEL OVERVIEW o c oe O Mo pa E Ek n E i i E The LX 7 rear panel is shown above The LX 5 rear panel is shown on page 2 6 The rear panels are similar except the LX 7 amplifier includes two 5 additional channels WARNING External wiring connected to connectors marked with the triangle pictured at the left requires installation by an Instructed person or the use of ready made leads or cords 2 4 LX Power Amplifiers l Power Switch Disconnects power to the AC Input Connector Set this switch to off when making or breaking connections to the amplifier or when changing the setting of the MODE switch 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 or 20 amps Line voltages 21096 above the specified voltage may damage the amplifier Line voltages lt 10 below the specified voltage may cause the amplifier to enter a protection mode indicated by the red standby LED flashing INPUT 1 to 7 LX 7 or 1 to 5 LX 5 Provide audio input for the speakers conne
15. edance ratings might activate protection modes 5 MODE Switch Configures channels 1 and 2 or 3 and 4 for INDIVIDUAL or BRIDGED operation When set to INDIVIDUAL all IN PUTs and OUTPUTs function as separate channels When set to BRIDGED the selected IN PUTs and OUTPUTS are combined to create a single high power channel Continued on page 2 7 2 5 Basic Operation Lexicon REAR PANEL OVERVIEW continued The LX 5 rear panel is shown above The LX 7 rear panel is shown on page 2 4 Both are similar except the LX 7 features two additional 5 channels 7 2 1 WARNING External wiring connected to connectors marked with the triangle pictured at the left requires installation by an instructed person or the use of ready made leads or cords 2 6 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 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 UNBAL BAL Switch Selects between unbalanced RCA or balanced XLR tip ring sleeve audio input for each channel Power the amplifier off or reduce system volume before changing the setting of the UNBAL BAL
16. elate to this Warranty Some states do not allow limitations on the duration of implied warranties and or the exclusion or limitation of incidental or consequential damages As such the above limitations may not apply This warranty is not enforceable outside of North America This warranty provides specific legal rights Additional rights may be provided by some states Customer Support Tel 781 280 0300 Fax 781 280 0495 Sales Fax 781 280 0499 Service lexicon H 4 Harman International Company Lexicon Inc 3 Oak Park Bedford MA 01730 1413 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 070 14876 Rev 3 03 03
17. external device but the amplifer does not power on and off with the external device l Make sure the TRIGGER INPUT switch is set to ON or DELAY LX Power Amplifiers The amplifier and other electrical devices in the listening room suddenly lose power 1 Reset the circuit breakers for the affected device s If all else fails l 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 e Clean the exterior surfaces of the unit with a soft dry lint free cloth Do not use alcohol benzene acetone based cleaners or strong commercial cleaners Do not use a cloth made with steel wool or metal polish If the unit is exposed to a dusty environment a low pressure blower may be used to remove dust from its exterior Troubleshooting amp M aintenance A EE Appendix SDSCITICOHIDEIS aussi ranita NAA DA 8 87 58331538 58 PLAN NG Ra 2492535243325 Declaration of Conformity ee ninas a s eee s s as s s s s s ir a n a A 4 Appendix SPECIFICATIONS Audio Input Connectors e 7 RCA 7 XLR including 1 4 inch Tip Ring Sleeve 5 RCA 5 XLR including 1 4 inch Tip Ring Sleeve Audio Output Connectors e 7 pairs of heavy duty binding posts e 5 pairs of heavy duty bin
18. he product model and serial numbers and a description of the problem Do not return the unit to Lexicon Inc without prior authorization When Shipping a Product for Service 1 Pay any initial shipping charges which are the responsibility of the owner If necessary repairs are covered by this warranty Lexicon Inc will pay return shipping charges to any destination in the United States using the carrier of our choice 2 Pack the unit securely Package insurance is strongly recommended Lexicon Inc Tel 781 280 0300 3 Oak Park Fax 781 280 0490 Bedford MA 01730 1413 USA www lexicon com 3 Include a copy of the original dated sales receipt A copy of the original dated sales receipt must be presented whenever warranty service is required 4 Do notinclude accessories such as power cords or user guides unless instructed to do so What are the Limitations of Implied Warranties Any implied warranties including warranties of merchantability and fitness for a particular purpose are limited in duration to the length of this warranty What Certain Damages are Excluded Lexicon s liability for a defective product is limited to repair or replacement of that product at our option Lexicon Inc shall not be liable for damages based on inconvenience loss of use of the product loss of time interrupted operation commercial loss or any other damages whether incidental consequential or otherwise How do State Laws R
19. it and the standby LED will flash rapidly The internal fans will automatically be set to full speed to cool the transformer Once the transformer has cooled enough it will automatically be reset and the amplifier will operate normally The channel status LEDs will light blue and the standby LED will no longer be lit LX Power Amplifiers 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 After approximately 4 seconds DC protection will be automatically deactivated The relay will close and the corresponding channel status LED will light blue If DC or frequencies below 10Hz are still present DC protection will be automatically reactivated The amplifier will continue to engage this protection until the problem is no longer present Basic Operation 2 0 3 AA Troubleshooting amp Maintenance TOUDI NOOO sis errado ridad od a pu WG ADIK ua hi MEN PCENA 3 2 Maintenance ll cesis hihi s s i lah a a 3 3 Troubleshooting amp Maintenance TROUBLESHOOTING No front panel LEDs are lit l Make sure the unit is plugged in and the rear panel power switch is set to on The Standby LED is flashing rapidly l Power the amplifier off Allow the amplifier to cool before powering it on again 2 Check the incoming line voltage
20. k Specifications are subject to change without notice Appendix Application of Council Directive s Standard s to which Conformity is Declared Manufacturer Type of Equipment Model Date Lexicon DECLARATION OF CONFORMITY 89 336 EEC and 93 68 EEC EN 55103 1 1995 EN 61000 3 3 1995 EN 55022 1992 Class B EN 55103 2 1996 and EN 60065 1998 Lexicon Inc 3 Oak Park Bedford MA 01730 1441 USA The equipment identified here conforms to the Directive s and Standard s specified above LX 5 and LX 7 Power Amplifiers Lexicon LX 5 and LX 7 March 2003 Lexicon Inc Vice President of Engineering 3 Oak Park Bedford MA 01730 1441 USA Tel 781 280 0300 Fax 781 280 0490 T m BRIDGED Mode 2 5 2 7 AC Input Connector 2 5 AC Power Cord 2 7 BAL UNBAL Switch 2 5 2 7 3 2 Channel Status LEDs 2 2 2 3 2 8 2 9 3 2 Connectors 2 4 2 5 2 6 3 2 Cooling System 2 8 DC Protection 2 9 Declaration of Conformity A 3 Documentation Conventions i Front Panel A brent AR 2 2 to 2 3 LX 2 2 Illustration LX 5 2 3 Illustration GROUND LIFT Switch 2 7 3 2 INDIVIDUAL Mode 2 5 INPUTS a ss e NG e 2 4 2
21. nspektion i Product Registration Y E RO 1 3 aa Desempaquetando e Inspecci n i Installation Considerations 0 o ooooooooo o 1 3 a Deballer et Inspection iii Spacchettando ed Ispezione ii Section 2 Basic Operation CT Desempacotando Inspec o ii Front Panel Overview n 2 2 Rear Panel Overview n 2 4 Cooling System e s dE des Ns 2 8 Protection Modes n 2 8 Thermal Protection DC Protection Section 3 Troubleshooting and Maintenance Troubleshooting 45 rara 9o RE X e a kA 3 2 Maintenance aaaea Pe aude deeds ees eee da 3 3 Appendix SpecificationS eae hod wee ees A 2 Declaration of Conformity A 4 Index LX Power Amplifiers Introduction am 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 e AUSPACKEND UND INSPEKTION berpr fen Sie die Verpackung auf Besch digung Nehmen Sie das Gerat aus der Verpackung Heben Sie das gesamte Verpackungsmaterial auf falls das Ger t einmal verschickt werden muss berpr fen Sie
22. switch If the amplifier is connected to a digital controller such as the M C 12 or MC 8 output levels should be re calibrated whenever the setting is changed GROUND LIFT Switch When set to ON isolates the ground connection between the audio inputs and the chassis This can be useful for eliminating audible hum or noise caused by multiple grounding paths in the system When set to OFF the audio inputs are grounded to the chassis This switch should be set to ON whenever there is ground noise present in the system WARNING Do not defeat or remove the ground prong on the AC power cord This will result in a safety hazard and will not reduce audible hum The GROUND LIFT switch has no effect on the safety ground of the amplifier Basic Operation 8 TRIGGER INPUT Enables the amplifier to be controlled by the M C 12 M C 8 or other external devices with a 12V DC trigger output Connect the trigger output of the external device to the TRIGGER INPUT of the amplifer and set the TRIGGER switch on the amplifier to ON or DELAY The amplifier will automatically respond when the external device is powered on and off TRIGGER INPUT Switch When set to OFF the amplifier only powers on and off in response to the front panel standby button When set to ON or DELAY only the external device connected to the TRIGGER INPUT can be used to power the amplifier on and off The front panel standby button will not power the unit on and off
23. 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 What is Covered This warranty covers all defects in material and workmanship on this product except as specified below The following are not covered 1 Damage resulting from A Accident misuse abuse or neglect B Failure to follow instructions contained in the user guide C Repair or attempted repair unauthorized by Lexicon Inc D Failure to perform maintenance E Causes other than product defects including lack of skill competence or experience on the part of the owner recommended periodic exicon H A Harman International Company 2 Damage occurring during any shipment of this product Claims for shipping damages must be made with the Carrier 3 Damage to a unit that has been altered or on which the serial number has been defaced modified or removed What Expenses will Lexicon Inc Assume Lexicon Inc will pay all labor and material expenses for covered items Payment of shipping charges is discussed in the next section of the warranty How is Service Obtained When this product needs service write telephone or fax Lexicon Inc to reguest information about where the unit should be taken or sent When making a written reguest please include your name complete address and daytime telephone number t
24. tting Started PRODUCT REGISTRATION 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 Retain the sales receipt as proof of warranty coverage INSTALLATION CONSIDERATIONS The LX Power Amplifiers require special 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 Amplifiers CAUTION which are quite heavy Do not obstruct the ventilation holes in the chassis 1 3 Front Panel Overview ll lol sl kl kkk Rear Panel Overview ee aa Cooling System aa KANG CARE Protection Modes eR aa Thermal Protection DC Protection 2 Basic Operation Basic Operation FRONT PANEL OVERVIEW 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 When the unit is on pressing the standb
25. y button activates standby mode and deactivates the LX amplifier When the unit is in standby pressing the standby button deactivates standby mode and activates the LX amplifier The red standby button LED will flash for approximately five seconds Then the blue channel status LEDs will light If the red standby button LED Lexicon 2 flashes rapidly and the blue channel status LEDs do not light the incoming AC voltage is too low or the temperature of the transformer is too high Refer to Section 3 for troubleshooting information Note Power is still supplied to the LX amplifier when standby mode is activated LX Power Amplifiers 1 2 Channel Status LEDs Provide at a glance view of the status of each channel as indicated in the table below Constant Blue Normal Operation Constant Bright Blue lt 1 distortion in the audio signal Reduce vol ume level to help eliminate potentially damaging audio signals from reaching the speakers Flashing Red The temperature of the individual amplifier card is too high If this occurs the channel will not pass audio The channel status LED will light blue when the temperature of the ampli fier card returns to normal Then the channel will automatically resume passing audio Basic Operation N am EN DI A T i lI l n Lu H v i T THEW T ihmal rer TAN i P Constant Red A fault in the channel Refer to S
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