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Corrective maintenance

Troubleshooting and diagnosis

For any issue, consider the diagnosis tables for the possible causes and inspection procedures (if any).
Before applying any procedure, consider the

Exploded view

(p.68) to get acquainted with the disassembly/

reassembly procedures to perform before and after.

Interface issues

“black screen" and no LEDs when the controller is on

possible cause

diagnosis / procedure

power cord is not connected

• Check that the power cord is connected to mains.
• Check that the powerCON is properly connected and

locked.

mains failure or incompatible voltage

Check that mains are available and that voltage is

compatible ( 100 V AC - 240 V AC ± 10%, 50 Hz - 60

Hz ).

power cord damaged

Inspect the power cord. If necessary, replace it.

amplied controller on standby

Connect the amplied controller to a computer running LA

Network Manager (the L-NET connector LEDs turn on) and

switch the amplied controller to the operating mode.

other causes

Contact L-Acoustics.

"grey screen": LCD screen lit but nothing displayed

possible cause

diagnosis / procedure

condensing humidity

Put the controller in a non-condensing environment and

wait until dry.

start-up / rmware issue

• Power off and on again.
• Check if LA Network Manager detects the amplied

controller.

• Update the rmware.

other causes

Contact L-Acoustics.

LA4X owner's manual (EN) version 14.1

Содержание LA4X

Страница 1: ...LA4X owner s manual EN ...

Страница 2: ...anual EN version 14 1 Distribution date December 17 2019 2019 L Acoustics All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means without the express written consent of the publisher ...

Страница 3: ...chitecture 14 Power supply and ampli er section 15 Speaker outputs 15 Speaker protection 15 Monitoring and control 15 User interface 15 L NET remote control network 15 Inspection and preventive maintenance 16 How to do preventive maintenance 16 External structure 16 Cleanness 17 Normal start up sequence 17 Network functionalities and rmware 17 Installation 18 Mounting 18 Ventilation 19 Connecting ...

Страница 4: ...n 30 Using quick access functions 31 Locking Unlocking the front panel 31 Muting Unmuting an output channel 31 Modifying gain 31 Identifying an ampli ed controller 32 Displaying input level input selection input mode and group information 33 Using the main menu 34 LOAD PRESET 35 STORE PRESET 37 DELETE PRESET 38 PRESET PARAMETERS 38 CLEAR GROUP PARAMS 40 INPUT SETTINGS 41 MONITORING INFO 49 OPTIONS...

Страница 5: ...cedures 69 D R Grill and foam lter 69 D R Side bracket 70 D R Rear bracket 71 D R Front handles 72 Speci cations 73 General 73 Input signal distribution 74 Analog input 74 Digital input 75 Latency 75 AVB 76 Automatic fallback option 76 Remote control and monitoring 76 Physical data 77 Appendix A Glossary 78 Appendix B List of AVB reservation errors 78 Appendix C Approvals 81 5 ...

Страница 6: ...he 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 speci ed by the manufacturer 12 Use only with the cart stand tripod bracket or table speci ed by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoi...

Страница 7: ...ows 100 120 V 20 A 200 240 V 10 A Electrical generator You must power on the generator before powering on the product Verify that the product is turned off before powering on the generator Terminals marked with the lightning ash symbol are HAZARDOUS LIVE The external wiring connected to these terminals requires installation by an instructed person or the use of ready made leads or cords Never atte...

Страница 8: ... E1 residential E2 commercial and light industrial E3 urban outdoors E4 controlled EMC environment ex TV studio as per EN55103 2 standards Avoid radio interference This product has been tested and complies with the limits indicated in the EMC directive Electro Magnetic Compatibility These limits are designed to provide reasonable protection against harmful interference from electrical equipment bu...

Страница 9: ...oducts and the content of its documents without prior notice Check www l acoustics com on a regular basis to download the latest document and software updates Contact information For information on advanced corrective maintenance contact your Certi ed Provider or your L Acoustics representative for Certi ed Providers contact the L Acoustics customer service customer service l acoustics com Symbols...

Страница 10: ...ns requiring a high count of independent sound sources such as stage monitors multi channel systems and multi feed distributed systems FULL ACTIVE In high end installation projects the LA4X can drive active systems up to K2 for maximum power headroom and the best possible performances With one transducer section per output channel and the independent DSP treatment of each output this approach brin...

Страница 11: ... to the ampli ed controllers Powering and driving system LA4X Ampli ed controller with DSP preset library and networking capabilities Software applications LA Network Manager Software for remote control and monitoring of ampli ed controllers Refer to the Soundvision help Refer to the LA Network Manager help Illustrations LA Network Manager L Case LA4X owner s manual EN version 14 1 11 ...

Страница 12: ...t and rear panels 5 1 2 3 4 6 7 8 9 10 11 12 13 14 15 011 K2 70 100 LF_A LF_A MF_A HF_A 1 status LED 2 LED meters 10 powerCON power supply connector 20 A LIMIT CLIP level 11 outward ventilation grills audio levels 5 dB 10 dB and 20 dB 12 speakON output connectors SIGNAL presence 13 XLR analog and AES EBU input connectors LOAD presence 14 XLR analog and AES EBU link connectors 3 L NET network contr...

Страница 13: ... actively connected to the input ports with failsafe relay in case of mains absence The link connectors allow transmitting the input signals to daisy chained ampli ed controllers Each AES EBU link port is ESD protected and transformer balanced Each AES EBU input port is equipped with a SRC Sample Rate Converter that has been selected to support a wide range of input formats 16 24 bits 44 1 192 kHz...

Страница 14: ...or an even more natural transparent and realistic sound experience The DSP engine is a 32 bit oating point DSP at 96 kHz sampling rate providing an enhanced dynamic range since it does not generate calculation clips like a xed point DSP A dedicated engineering approach combining IIR and FIR lters generates perfectly linearized phase curves and signi cantly improved impulse responses The 4 4 matrix...

Страница 15: ... is adjusted to the dynamic and thermal capacity of each individual transducer Monitoring and control User interface The front panel user interface provides Real time monitoring functionalities via the LED display signals presence and level and the LCD screen system parameters Instant access to navigation and parameters control using the encoder wheel and the six keys See also illustration in sect...

Страница 16: ...h xed installations External structure p 16 Cleanness p 17 Functionalities At least once a year Normal start up sequence p 17 Network functionalities and rmware p 17 External structure The indicates a visual inspection side brackets front handles and rear brackets are present and not damaged encoder wheel and grill and foam lter are present and not damaged see also Cleanness p 17 chassis Lexan pla...

Страница 17: ... Equipment computer with LA Network Manager and CAT5e U FTP cable Procedure 1 Connect the controller to an Ethernet port of a computer running LA Network Manager Use the CAT5e U FTP cable 2 Run LA Network Manager 3 Check that the ampli ed controller is detected as an online Unit Refer to the LA Network Manager Help 4 Check that all LA4X in the system run the same version of the rmware and that it ...

Страница 18: ...LOG IN A LINK A ANALOG IN D LINK D OUT 2 OUT 3 OUT 4 OUT 1 1 1 2 2 1 1 2 2 1 1 1 1 OUT 2 OUT 4 88 mm 3 5 in 483 mm 19 in 406 mm 16 in 420 mm 16 5 in 16 mm 0 63 in 398 mm 15 7 in 434 mm 17 in Risk of damaging the ampli ed controller during transport During transport or while on tour the ampli ed controller should be rear supported in addition to the front panel mounting Use the rear brackets provid...

Страница 19: ... of the mains supply Only connect the product to an AC power outlet rated 100 240 V 50 60 Hz with the following current values 100 120 V 20 A 200 240 V 10 A WARNING The product is of CLASS 1 construction and shall be connected to a mains socket outlet with a protective connection to earth Three phase circuit When the product is used in a three phase circuit verify the electrical conformity and com...

Страница 20: ...ord type as follows type plug live neutral ground CE CN CEE 7 7 16 A 250 V grounded GB1002 GB2099 16 A brown blue green yellow US NEMA 5 15 15 A 125 V grounded black white green INT bare ends local power plug to be tted black white green yellow Strictly apply the speci c safety regulations of the country of use Do not defeat the ground connection of the supplied power cord using an adaptor or any ...

Страница 21: ... power rating Heat power calculation If a 4 Ω load is connected to each output channel of the LA4X each channel delivers up to 1000 W With a standard use at 1 8 of full power 9 dB headroom the power delivered per channel is 1000 8 125 W so a total power of 4 x 125 500 W According to the table in section Power consumption p 21 the LA4X power consumption is 750 W The heat power produced is then diff...

Страница 22: ... wired as follows left speakON connector right speakON connector Pin 1 Out 1 Pin 1 Out 3 Pin 1 Out 1 Pin 1 Out 3 Pin 2 Out 2 Pin 2 Out 4 Pin 2 Out 2 Pin 2 Out 4 output audio paths 1 1 2 2 1 1 2 2 top left bottom left DSP 1 1 2 2 top right 1 1 2 2 bottom right OUT 1 OUT 2 OUT 3 OUT 4 22 LA4X owner s manual EN version 14 1 ...

Страница 23: ...tors ANALOG IN A to ANALOG IN D can receive up to four analog signals when setting the analog input mode for channel pairs AB and CD The headroom of the input circuits is high enough to accept the maximum output level from virtually any line level signal source up to 22 dBu Each LINK connector is passively wired in parallel to the corresponding IN channel The input impedance is high enough 22 kΩ b...

Страница 24: ... noise especially over long cable runs In a daisy chain layout the male XLR link connectors LINK A to LINK D feed the input signals to the next ampli ed controller in the signal chain daisy chaining analog audio IN A IN C IN B IN D LINK A LINK B Analog daisy chain and LA4 LA8 with power off or in standby In an analog daisy chain LA4 and LA8 with power off or in standby cause sound distortion at hi...

Страница 25: ...ntroller shuts down the failsafe relay makes a passive connection between the AES EBU IN ports and the LINK ports to maintain continuity However the signals are no longer refreshed for the next ampli ed controller so that the input cable and the link cable must be considered as a unique input cable with regard to the maximum supported length In case of transmission losses try to reduce the samplin...

Страница 26: ...A4X to create an AVB network use the etherCON connectors on the rear panel Refer to the LA Network Manager Help for more information on how to connect LA4X to the AVB network in daisy chain star or hybrid topologies Speaker To connect an enclosure to the ampli ed controller use the speakON connectors For cabling schemes refer to the Ampli cation reference technical bulletin For the enclosure drive...

Страница 27: ... ampli ed controller is no longer detected over the network Powering off the ampli ed controller does not disconnect it from mains Power loss If power is lost the ampli ed controller shuts down but all parameters are restored when the ampli ed controller switches on again Setting to standby mode To reduce the electrical consumption the ampli ed controller can be put in standby mode Use LA Network ...

Страница 28: ... circuitry indicating a protection system is active Refer to Error messages p 64 L NET The L NET LED on the front panel displays the L NET status green when the LA4X is remotely controlled by software such as LA Network Manager refer to the LA Network Manager Help off when no software remotely controls the ampli ed controller The front panel commands remain accessible when the L NET LED is lit 28 ...

Страница 29: ...clip 5dB 10dB 20dB green the output voltage reaches 5 10 or 20 dB below the maximum level SIGNAL green a signal is detected and the output voltage reaches 0 1 V LOAD green a load is connected and the output module delivers a minimum of 0 8 A OUT The four OUT LEDs on the front panel display the mute status white when the corresponding output channel is muted off when the corresponding output channe...

Страница 30: ...bove the corresponding output key written in the xx_y form where xx indicates the type of transducer section or enclosure to be connected to the output channel LF low frequency transducer section part of a 2 or 3 way loudspeaker enclosure MF mid frequency transducer section part of a 3 way loudspeaker enclosure HF high frequency transducer section part of a 2 or 3 way loudspeaker enclosure PA pass...

Страница 31: ...r less than 0 3 seconds To mute an output channel press the corresponding OUT key for less than 0 3 seconds The screen displays MUTE OUT and the mute status of each output channel for 2 seconds example unmuting OUT1 MUTE OUT OFF ON ON ON Gain can be set before unmuting Modifying gain About this task Gain can be modi ed for sets of output channels having input channels in common in their input sele...

Страница 32: ...n by steps of 1 dB 3 Release the OUT key to return to the main screen Identifying an ampli ed controller If the ampli ed controller is connected to the L NET network it can be identi ed among other ampli ed controllers on the Workspace of LA Network Manager refer to the LA Network Manager Help To identify an ampli ed controller press and hold the encoder wheel On the Workspace of LA Network Manage...

Страница 33: ...output channel The rst line of the LCD screen 3 indicates the input mode and status of input channel pairs AB and CD Brackets indicate Channel Sets refer to PRESET PARAMETERS p 38 The second line of the screen indicates the group names if any of output channels OUT1 OUT2 OUT3 and OUT4 respectively from left to right refer to section CLEAR GROUP PARAMS p 40 In case of multiple group assignations th...

Страница 34: ...er wheel clockwise or counterclockwise to display the other pages The page is the last in the menu Turn the encoder wheel counterclockwise to display the other pages The horizontal arrows on the right indicate submenus availability Indicates a submenu is available Press the OK key or the encoder wheel to access it No submenu is available Procedure 1 From the main screen press and release the encod...

Страница 35: ...d output temperature in percentage of the maximum values display rmware and preset library versions and ampli ed controller s MAC address launch ENCLOSURE CHECK OPTIONS p 52 set the ampli ed controller s delay unit and screen contrast reset all parameters to factory settings IP SETTINGS p 55 set the ampli ed controller s IP settings IP address subnet mask and gateway All parameters can also be sel...

Страница 36: ...efer to section STORE PRESET p 37 3 Press the OK key to load the selected preset The ampli ed controller displays ARE YOU SURE 4 Press the OK key or the encoder wheel to validate or press the ESC key to cancel The ampli ed controller displays CLEAR GROUP PARAM OUTPUTS MUTED when it is assigned to groups and is no longer connected to the L NET network Either press the OK key to load the preset whil...

Страница 37: ...controller is turned off OK OK OK OK OK STORE PRESET DELETE PRESET STORE USER PRESET 001 ENTER PRESET NAME 002 K2 70 ENTER PRESET NAME 002 MYK2 OVERWRITE 002 MYK2 002 MYK2 100 LF_A LF_A MF_A HF_A ENTER PRESET NAME 002 MYK2 Procedure 1 From the main menu select STORE PRESET 2 Turn the encoder wheel and select the user memory space 3 Press the OK key or the encoder wheel to validate 4 If necessary e...

Страница 38: ...preset is the currently loaded preset It is not possible to delete the currently loaded preset Press the ESC key to cancel The ampli ed controller displays ARE YOU SURE 4 Press the OK key or the encoder wheel to validate or press the ESC key to cancel PRESET PARAMETERS The preset parameters include gain delay polarity and input selection OK PRESET PARAMETERS CLEAR GROUP PARAMS GAIN dB 0 0 0 0 0 0 ...

Страница 39: ...ELAY ms 0 01 0 00 0 00 0 00 OUT2 for polarity and input OUT1 OUT1 POLARITY POLARITY INPUT SELECTION A A B B INPUT SELECTION C A B B OUT2 OUT2 Procedure 1 From the main menu select PRESET PARAMETERS 2 Turn the encoder wheel to select a preset parameter GAIN dB DELAY ms POLARITY or INPUT SELECTION 3 Press and hold the output key of an output channel or one of the output keys of a channel set to sele...

Страница 40: ...e and when the ampli ed controller is shut down or restarted Group parameters are not preset dependent and remain active when a different preset is loaded Therefore L Acoustics recommends to clear group parameters when an ampli ed controller is used in standalone mode after being used within a network To verify if output channels are assigned to a group refer to Displaying input level input select...

Страница 41: ...3 in MONITORING INFO menu do not support AVB These Units can be upgraded to support AVB by purchasing and installing KR LA4XDSP2 INPUT SETTINGS MONITORING INFO OK XLR AB INPUT MODE ANALOG XLR CD INPUT MODE ANALOG AES AB FALLBACK MODE OFF AES EBU GAIN 0 0dB ABCD INPUT SOURCE Compatible LA4X ampli ed controllers can retrieve four channels from an AVB stream containing up to eight channels at 48 kHz ...

Страница 42: ...that the talker is in working order fully booted RSV ERROR and error code The bandwidth reservation has failed It can also be temporarily displayed when a network cable is disconnected then reconnected If displayed for more than a few seconds refer to the Appendix B List of AVB reservation errors p 78 WAITING START The bandwidth is reserved but the Unit has received a stop streaming command by the...

Страница 43: ...XLR LOCKING ABCD INPUT SOURCE AVB RSV ERROR 14 ABCD INPUT SOURCE AVB WAITING START Reverting from AVB fallback When the READY status is recovered on the AVB input reverting to the initial input mode is manual ABCD INPUT SOURCE FBACK XLR READY 96k OK ABCD INPUT SOURCE AVB READY 96k OK ABCD INPUT SOURCE AVB READY 96k ABCD INPUT SOURCE AVB LOCKED 96k Procedure 1 From the ABCD INPUT SOURCE menu press ...

Страница 44: ...is enabled the status of the signals is displayed LOCKED and the sampling frequency Indicates a digital audio source is connected to the AES EBU input the signal delivered by the source has a format supported by the controller s digital audio board and no loss or fault is being detected during data transfer For example LOCKED 44k1 indicates the digital audio source provides signals of sampling fre...

Страница 45: ... when the signal returns to a normal state AVB FALLBACK MODE OFF OK AVB FALLBACK MODE OFF OK AVB FALLBACK MODE AVB XLR Procedure Precautions to avoid sound cuts or level differences upon fallback The XLR inputs must be connected to an audio source analog or digital playing the same program as the AVB audio source When an analog source is connected to the XLR inputs the level of the AVB audio sourc...

Страница 46: ...autions to avoid sound cuts or level differences upon fallback Input pair CD must be connected to an audio source analog or digital playing the same program as the digital audio source connected to input pair AB When an analog audio source is connected to input pair CD the level of the digital audio source connected to input pair AB must be aligned to the level of the analog audio source using AES...

Страница 47: ... if the fallback input is a digital audio source 0 dB AES EBU AVB GAIN 0 0dB OK AES EBU AVB GAIN 0 0dB AES EBU AVB GAIN 2 0dB OK AES EBU GAIN 0 0dB OK AES EBU GAIN 0 0dB AES EBU GAIN 2 0dB OK Procedure 1 From the main menu select INPUT SETTINGS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select AES EBU AVB GAIN 4 Press and hold the ESC OK or OUT1 key 5 Turn the ...

Страница 48: ... 1 2 3 4 AVB STREAM MAPPING 6 2 3 4 AVB STREAM MAPPING 6 8 3 4 AVB STREAM MAPPING 6 8 5 4 AVB STREAM MAPPING 6 8 5 7 Procedure 1 From the main menu select INPUT SETTINGS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select AVB STREAM MAPPING 4 Press and hold the OUT1 key 5 Turn the encoder wheel to select the channel number 6 Release the OUT1 key 7 Repeat step 4 t...

Страница 49: ...ersion The ENCLOSURE CHECK function MONITORING INFO OPTIONS OK SPK HANDLING 12 10 13 11 OUT CH TEMP 52 53 50 48 ETHERNET LINKS 1 1G FULL 2 100 FULL AVB CLOCK STATUS DISABLED FIRMWARE V2 8 1 PRESET LIBRARY V5 8 MAC ADDRESS 00 1B 92 01 90 3A HARDWARE INFO ID4 ENCLOSURE CHECK PRESS OK TO START SPK HANDLING SPK HANDLING speaker handling displays the RMS voltage measured at each individual ampli er cir...

Страница 50: ...ected at the other end of the cable port failure ETHERNET LINKS 1 1G FULL 2 100 FULL For example in this illustration port 1 has a speed of 1 Gbits s port 2 has a speed of 100 Mbits s and both are in full duplex mode AVB CLOCK STATUS AVB CLOCK STATUS displays the current status of the AVB clock LA4X ampli ed controllers with HARDWARE INFO ID1 ID2 or ID3 in MONITORING INFO menu do not support AVB T...

Страница 51: ...ation serial number It is set by the manufacturer and cannot be modi ed MAC ADDRESS 00 1B 92 01 90 3A For example in this illustration the MAC address is 00 1B 92 01 90 3A HARDWARE INFO HARDWARE INFO displays the version of the hardware in use in the ampli ed controller For troubleshooting purposes it can be useful to communicate this number to the L Acoustics representative HARDWARE INFO ID4 For ...

Страница 52: ...OFF RESET TO FACTORY DEFAULT SETTINGS DELAY UNIT Delay values can be displayed in ms milliseconds meters feet or samples The values in meters and feet are given for a temperature of 20 C 68 F OK DELAY UNIT ms DELAY UNIT ms DELAY UNIT SAMPLES OK Procedure 1 From the main menu select OPTIONS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select DELAY UNIT 4 Press the...

Страница 53: ...ess the OK key or the encoder wheel to validate LED BACKLIGHT MODE The brightness of the LED and the LCD screen backlight can be modi ed to adapt to a very bright or very dark environment OK LED BACKLIGHT NORMAL LED BACKLIGHT NORMAL LED BACKLIGHT MEDIUM OK Procedure 1 From the main menu select OPTIONS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select LED BACKLI...

Страница 54: ... Press the OK key or the encoder wheel to validate 5 Turn the encoder wheel to select the setting ON or OFF 6 Press the OK key or the encoder wheel to validate RESET TO FACTORY DEFAULT SETTINGS The ampli ed controller settings can be reset to the factory default RESET TO FACTORY DEFAULT SETTINGS RESET AMP TO FACTORY ARE YOU SURE Initializing Controller 011 K2 70 103 LF_A LF_A MF_A HF_A OK OK Proce...

Страница 55: ...address 192 168 1 100 Subnet address 192 168 1 0 24 IP broadcast address 192 168 1 255 Subnet mask 255 255 255 0 With these settings the rst three bytes of the IP address 192 168 1 de ne the subnet address and the last byte is the host address 100 In general it is recommended to Use the default subnet address and subnet mask Edit the device host address to provide a unique identi er to each unit u...

Страница 56: ...o cancel 6 If needed set another byte rst second or third number as follows a Long press the OUT key under the byte to select it b Turn the encoder wheel to select a value c Press the OK key or the encoder wheel to apply d On the computer hosting LA Network Manager con gure the same subnet Refer to the LA Network Manager Help in User guide General e In LA Network Manager 1 Click the L Acoustics lo...

Страница 57: ...254 0 SUBNET MASK 255 255 255 0 ESC OK Procedure 1 From the main menu select IP SETTINGS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select SUBNET MASK 4 Press any OUT key or the encoder wheel to select the Subnet mask 5 Turn the encoder wheel to select a value for the Subnet mask 6 Press the OK key or the encoder wheel to apply or press the ESC key to cancel 7 ...

Страница 58: ...teway The gateway address must be set on the units to enable communication with the supervision tool modifying the gateway GATEWAY 0 0 0 0 GATEWAY 0 0 0 0 GATEWAY 192 168 1 253 OUT4 ESC OK GATEWAY 192 168 1 253 GATEWAY 0 0 0 0 Procedure 1 From the main menu select IP SETTINGS 2 Press the OK key or the encoder wheel to validate 3 Turn the encoder wheel to select GATEWAY 4 Long press the OUT key und...

Страница 59: ... OUT4 locked LOAD PRESET FACTORY PIN code protected STORE PRESET PIN code protected DELETE PRESET locked PRESET PARAMETERS all parameters PIN code protected CLEAR GROUP PARAMS PIN code protected NETWORK ADDRESS PIN code protected RESET TO FACTORY DEFAULT SETTINGS locked When settings protection is enabled and a user tries to modify a setting Locked settings Screen displays ACCESS LOCKED Settings c...

Страница 60: ...encoder wheel to select the rst digit of the PIN code 3 Release the OUT1 key 4 Repeat step 1 to 3 with the OUT2 OUT3 and OUT4 keys 5 Press the OK key or the encoder wheel to validate If the controller returns to the ENTER PIN screen the entered PIN code is wrong Repeat step 1 to 5 with the right PIN code or press the ESC key to cancel 60 LA4X owner s manual EN version 14 1 ...

Страница 61: ...gives an overview of the order in which the elements must be disassembled and reassembled Each assembly refers to the corresponding D R procedure and the necessary repair kit s Disassembly and Reassembly procedures p 69 This section contains the maintenance procedures for each assembly identi ed in the exploded view Inspection and preventive maintenance p 16 These checks allow to detect an issue T...

Страница 62: ...ble voltage Check that mains are available and that voltage is compatible 100 V AC 240 V AC 10 50 Hz 60 Hz power cord damaged Inspect the power cord If necessary replace it ampli ed controller on standby Connect the ampli ed controller to a computer running LA Network Manager the L NET connector LEDs turn on and switch the ampli ed controller to the operating mode other causes Contact L Acoustics ...

Страница 63: ... not contain the ampli ed controller IP address Include the ampli ed controller IP address into the scanning range ampli ed controller is set with an incorrect IP address or several ampli ed controller are set with the same IP address Set the computer IP address and subnet mask and the ampli ed controller IP address as indicated in the LA Network Manager help L NET cable is not plugged or incorrec...

Страница 64: ...oustics representative for maintenance Output channel external error messages The output channels are continuously monitored for external errors Error on channel Channel muted Displayed if an external error is detected at an output channel typically due to a short circuit in a cable The channel is muted The channel is automatically unmuted when the issue is solved If the error persists after disco...

Страница 65: ...enclosures Disconnect or replace the faulty enclosure then unmute the output channel For temperature related messages possible cause diagnosis procedure room temperature is too high too low Make sure room temperature is within ampli ed controller operating condition range 0º C 32º F to 50º C 122º F foam lter clogged inside of ampli ed controller dusty Clean or replace the foam lter clean the ampli...

Страница 66: ...ampli ed controller analog input connector for analog audio source AES EBU input connector for AES EBU audio source audio source cable is damaged Replace the XLR cable incorrect settings on the audio source Set appropriate parameter values on the audio source in particular the output gain value refer to the third party documentation non audible bit stream Check that the AES EBU source does not del...

Страница 67: ...ect preset selection Select a preset in accordance with the loudspeaker system connected to the outputs audio source cable incorrectly plugged Unplug the XLR cable and plug it again on the audio source and the ampli ed controller Verify with the installer if ground loops can occur audio source cable damaged Replace the XLR cable incorrect settings on the audio source Set appropriate parameter valu...

Страница 68: ...view each assembly corresponds to a D R procedure and the necessary repair kit s External modules rear brackets KR LABRACKET side brackets KR LA4XEQUAV KR LA4XGRI KR LA4XMOU front handles G03255 grill and foam filter 68 LA4X owner s manual EN version 14 1 ...

Страница 69: ...and foam lter Tools 3 mm slotted screwdriver Repair kit KR LA4XGRI KR grill LA4X LA12X 1 1 1339 1338 LA4X and LA12X grill LA4X and LA12X foam lter Exploded view To clean the foam lter use mild dishwashing detergent or soap then dry it LA4X owner s manual EN version 14 1 69 ...

Страница 70: ...aintenance D R Side bracket Tools torque screwdriver T10 Torx bit Repair kit KR LA4XEQUAV LA4X 2 front L bracket 2 8 1325 S209 side bracket M4x10 Torx Exploded view 1 N m T10 70 LA4X owner s manual EN version 14 1 ...

Страница 71: ...Corrective maintenance D R Rear bracket Repair kit KR LABRACKET Kit rear brackets LA4 LA4X LA8 LA12X 2 1362 ampli ed controller rear bracket Exploded view LA4X owner s manual EN version 14 1 71 ...

Страница 72: ...orx Prerequisite Side bracket disassembled See Side bracket p 70 Exploded view Front handles can only be mounted on compatible front structure To upgrade an ampli ed controller with a non compatible front structure contact the L Acoustics representative Self drilling screws For safety reasons always reassemble new front handles 1 N m T15 2 72 LA4X owner s manual EN version 14 1 ...

Страница 73: ...dBV 20 Hz 20 kHz 8 Ω A weighted Channel separation 80 dB at 1 kHz 8 Ω Damping factor 500 100 Hz and below 8 Ω Output delay 0 ms to 1000 ms Mains input power and current draw all channels driven Maximum output power 4 1000 W at 4 or 8 Ω 1 3 output power 5 dB 7 A 1600 W 1 8 output power 9 dB 3 A 750 W Idle 0 26 A 60 W Standby 0 1 A 11 W Current values given for mains rated at 230 V Multiply by 2 3 f...

Страница 74: ...ution Connectors Input 4 Neutrik female XLR3 IEC 268 ESD protected Link 4 Neutrik male XLR3 IEC 268 ESD protected Available input connectors vs input mode Analog AB Analog CD IN A IN B IN C IN D 4 connectors 4 channels Analog AB Digital CD IN A IN B IN C D 3 connectors 4 channels Digital AB Analog CD IN A B IN C IN D 3 connectors 4 channels Digital AB Digital CD IN A B IN C D 2 connectors 4 channe...

Страница 75: ...ing frequency 96 kHz SRC referenced to the ampli ed controller internal clock Word length 24 bits Dynamic range 140 dB Distortion THD N 120 dBFS dB Full Scale Bandpass ripple 0 05 dB 20 Hz 40 kHz 96 kHz Input gain Range 12 dB to 12 dB Steps 0 1 dB Latency Analog and AES EBU In standard operating mode 3 84 ms independent from input Fs In low latency operating mode 0 84 ms independent from input Fs ...

Страница 76: ...warded by AVB Bridge up to 32 Automatic fallback option Mode AVB to XLR on compatible units XLR AB to XLR CD digital to analog or digital to digital Switchover conditions AVB to XLR loss of lock XLR to XLR no clock loss of lock CRC error bipolar encoding error or data slip Constant delay independent from input Fs Constant level upon manual user selection of AES EBU AVB gain independent from input ...

Страница 77: ...C 50 60Hz 1500W ANALOG IN B LINK B L NET LINK ACT LINK ACT AES EBU IN C D LINK C D AES EBU IN A B LINK A B ANALOG IN C LINK C ANALOG IN A LINK A ANALOG IN D LINK D OUT 2 OUT 3 OUT 4 OUT 1 1 1 2 2 1 1 2 2 1 1 1 1 OUT 2 OUT 4 88 mm 3 5 in 483 mm 19 in 406 mm 16 in 420 mm 16 5 in 16 mm 0 63 in 398 mm 15 7 in 434 mm 17 in LA4X owner s manual EN version 14 1 77 ...

Страница 78: ...andwidth 2 Out of bridge resources One of the bridges on the path from the talker to the listener reached its limits Try to reboot the bridges on the path from the talker to the listener Try to disconnect some streams 3 Out of bandwidth for traf c class See error 1 4 Stream ID used by another talker A device on the network is behaving incorrectly Disconnect and reconnect the stream Reboot the talk...

Страница 79: ...o the listener has reached its limits Try to disconnect some streams Try to reboot the bridges on the path from the talker to the listener 11 Out of MMRP resources One of the bridges on the path from the talker to the listener has reached its limits Try to disconnect some streams Try to reboot the bridges on the path from the talker to the listener 12 Cannot store dest addr One of the bridges on t...

Страница 80: ...er to use a different VLAN one that is authorized by the bridges 18 VLAN tagging off on egress port One of the bridges on the path from the talker to the listener is incorrectly con gured Con gure the bridges to enable VLAN tagging of the egress packets 19 SR class priority mismatch A wrongly con gured AVB bridge is present in the network con gure all the bridges with the same setting default is 3...

Страница 81: ...Approvals Approvals LA4X owner s manual EN version 14 1 81 ...

Страница 82: ...X is certi ed with the following S E LA4X is compliant with the following Avnu Alliance and the Avnu design mark are registered trademarks and or service marks of Avnu Alliance 82 LA4X owner s manual EN version 14 1 ...

Страница 83: ...L Acoustics 13 rue Levacher Cintrat 91460 Marcoussis France 33 1 69 63 69 63 info l acoustics com www l acoustics com ...

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