L-Acoustics LA8 Maintenance Manual

Also see for LA8: Owner's manual Owner's manual User manual User manual User manual

Contents

L-Acoustics LA8 Maintenance Manual Manual pdf 6 page image

LA8 AMPLIFIED CONTROLLERMAINTENANCE MANUAL – LEVEL 1VERSION 2.0LA8_MM1_EN_2.0 w w w . l - a c o u s t i c s . c o m 6 / 212 QUALITY CONTROLThis procedure must be performed for periodic maintenance and to detect possible issues on a controller.ToolsName Reference Distributoraudio source with a known musical program — —LA NWM — L-ACOUSTICSCAT5e U/FTP cable — —full range loudspeaker — L-ACOUSTICSsubwoofer — L-ACOUSTICSear protections — —ProcedureInspect the external structure of the controller for any lost or damaged part.1.To verify if the controller is clean, follow these steps:2.a. Disassemble the FRONT FRAME and the FOAM FILTER, see procedure D/R 001.b. Verify if the FOAM FILTER is clean.c. Look inside the controller through the front grill (do not touch any part) and verify if the inside is clean.d. Reassemble the FRONT FRAME and the FOAM FILTER, see procedure D/R 001.Plug the controller to mains and power it on.3.Verify if the LCD screen and all LED lit during the start-up sequence.To verify if the network functionalities of the controller work, follow these steps:4.a. Connect the controller to an Ethernet port of the computer hosting LA NWM.Use the CAT5e U/FTP cable.b. Launch LA NWM.c. Verify if the controller can be put in online mode (refer to the LA NWM video tutorial).Verify if the latest version of firmware is installed (see the LA8 user manual or the LA NWM video tutorial).5.If not, update firmware from LA NWM.Select a known preset and verify if the indications displayed on screen are in accordance with it.6.To verify sound presence and quality on each output channel follow these steps:7.a. Plug the audio source to an input connector of the controller (IN A or IN B).b. Plug the full range loudspeaker to output connector OUT1.c. Select a corresponding preset.d. Select the routing from the audio source to OUT1.e. Play the musical program.f. Set the OUT1 gain to -40 dB.g. Unmute OUT1.h. Set the OUT1 gain to obtain a medium sound level.i. Verify if the sound is clear and undistorted.j. Mute OUT1.k. Repeat these steps for OUT2, OUT3 and OUT4.There is a risk of ear damage due to high sound level.Use ear protections.To verify the power capability of each output channel follow these steps:8.a. Plug the audio source to an input connector of the controller (IN A or IN B).b. Plug the subwoofer to output connector OUT1.c. Select a corresponding preset.d. Select the routing from the audio source to OUT1.e. Play the musical program.f. Set the OUT1 gain to -40 dB.g. Unmute OUT1.h. Set the OUT1 gain to obtain a high sound level.i. Verify if the sound remains clear and undistorted up to the limit level.j. Mute OUT1.k. Repeat these steps for OUT2, OUT3 and OUT4.