LA8
LA8 AMPLIFIED CONTROLLER
MAINTENANCE MANUAL – LEVEL 1
VERSION 2.0
www.l- a c ou st i c s . co m
LA8 AMPLIFIED CONTROLLER
MAINTENANCE MANUAL – LEVEL 1
VERSION 2.0
LA8_MM1 _E N_2. 0 w w w .l -a co u s ti c s .c om 2 / 21
SAFETY INSTRUCTIONS
1. Read this document.
2. Read all SAFETY INSTRUCTIONS carefully as well as DANGER and OBLIGATION warnings.
3. Never incorporate equipment or accessories not approved by L-ACOUSTICS
®
.
4. Strictly follow the sequence of the successive steps in all procedures.
5. Never use a faulty apparatus.
An apparatus showing any sign of issue must immediately be put aside and withdrawn from use.
6. Never attempt to perform a maintenance operation not mentioned in this manual.
This manual contains the maintenance operations authorized for the End User (level 1).
Performing another operation will expose the user to hazardous situations.
Contact L-ACOUSTICS® for advanced maintenance.
7. Follow all legally prescribed instructions if sending an apparatus to L-ACOUSTICS
®
for maintenance.
Save all user presets to files using LA NETWORK MANAGER software.
SYMBOLS
The following symbols are used in this document:
DANGER
This symbol indicates a potential risk of harm to an individual or damage to the product.
It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation
of the product.
ELECTRICAL HAZARD
This symbol indicates a potential risk of electrical injury.
It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation
of the product.
OBLIGATION
This symbol notifies the user about instructions that must be strictly followed to ensure proper installation or
operation of the product.
EQUIPMENT
This symbol indicates the equipment, tools, and spare parts required to perform a procedure.
INFORMATION
This symbol notifies the user about complementary information or optional instructions.
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CONTENTS
REVISION HISTORY 4
GLOSSARY 4
INTRODUCTION 4
1 EQUIPMENT AND TOOLS 5
2 QUALITY CONTROL 6
3 DIAGNOSIS 7
Diagnosis table ............................................................................................................................................................. 7
Exploded view............................................................................................................................................................ 15
Working time ............................................................................................................................................................. 15
4 MAINTENANCE PROCEDURES 16
D/R 001 – FRONT FRAME ........................................................................................................................................ 16
D/R 002 – FOAM FILTER .......................................................................................................................................... 17
D/R 003 – Power plug................................................................................................................................................ 18
D/R 004 – REAR BRACKETS ..................................................................................................................................... 19
APPENDIX: KR LIST 20
LA8 AMPLIFIED CONTROLLER
MAINTENANCE MANUAL – LEVEL 1
VERSION 2.0
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REVISION HISTORY
Document identification
Distribution date
Modifications
LA8_MM1_EN_1.0
June 11th, 2013
Initial version
LA8_MM1_EN_2.0
June 10, 2014
Updated for firmware V. 2.1.3.3
GLOSSARY
CE
Europe
CN
China
D/R
disassembly/reassembly
KR
Replacement Kit
JP
Japan
LA NWM
LA NETWORK MANAGER remote control software
LA8
in a general context: amplified controller of LA8 type
when used along with LA8CN, LA8JP or LA8US: LA8 CE version
LA8CN
LA8 CN version
LA8JP
LA8 JP version
LA8US
LA8 US version
MODULE
part of an amplified controller, written in uppercase characters
SMPS
Switched Mode Power Supply (power supply inside of the controller)
US
United States
INTRODUCTION
This LA8 maintenance manual – level 1 is intended for End Users and gathers the level 1 procedures for the LA8
amplified controller (periodic maintenance, troubleshooting and disassembly/reassembly of outside MODULES).
It is intended to be used as follows:
Perform the QUALITY CONTROL procedure and note down all detected issues. 1.
Refer to the DIAGNOSIS TABLE and EXPLODED VIEW for indications on how to address these issues.
2.
Perform the indicated corrective actions using the corresponding MAINTENANCE PROCEDURES. 3.
Perform the QUALITY CONTROL procedure a new time to verify there are no remaining issues. 4.
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1 EQUIPMENT AND TOOLS
The following table is the complete list of equipment and tools required to perform all level 1 maintenance
procedures on the LA8 amplified controller.
Equipment and tools
Reference
Manufacturer
audio source with a known musical program
— — CAT5e U/FTP cable
— — ear protections
— — voltage absence tester
—
—
wire stripping pliers
793936
Facom
full range loudspeaker
—
L-ACOUSTICS
LA NWM
—
L-ACOUSTICS
subwoofer
—
L-ACOUSTICS
Stanley knife
0-10-018
Stanley
LA8 AMPLIFIED CONTROLLER
MAINTENANCE MANUAL – LEVEL 1
VERSION 2.0
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2 QUALITY CONTROL
This procedure must be performed for periodic maintenance and to detect possible issues on a controller.
Tools
Name
Reference
Distributor
audio source with a known musical program
— — LA NWM
—
L-ACOUSTICS
CAT5e U/FTP cable
—
—
full range loudspeaker
—
L-ACOUSTICS
subwoofer
—
L-ACOUSTICS
ear protections
—
—
Procedure
Inspect 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.
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3 DIAGNOSIS
Diagnosis table
For any issue, follow the check sequence in the possible causes column.
At each step, apply the inspection procedure (if exists) and consider the resulting diagnosis.
See also the EXPLODED VIEW to obtain an overview of the disassembly/reassembly procedures.
External structure
Issue
Possible causes
Inspection procedure / Diagnosis
FOAM FILTER clogged
operation in very dusty or
cracked-oil smoke machine
environments
Clean the FOAM FILTER, see procedure
D/R 002.
Inside of the controller dirty
(visible from the front grill)
operation in very dusty or
cracked-oil smoke machine
environments
Contact L-ACOUSTICS®.
FOAM FILTER lost or damaged
mechanical shock
Replace the FOAM FILTER, see procedure
D/R 002.
FRONT FRAME lost or damaged
mechanical shock
Replace the FRONT FRAME, see procedure
D/R 001.
REAR BRACKETS lost or damaged
mechanical shock
Replace the REAR BRAC KETS, see
procedure D/R 004.
CHASSIS damaged
mechanical shock
Contact L-ACOUSTICS®.
POWER CORD damaged
pulled, trampled, pinched,
frayed…
Contact L-ACOUSTICS®.
Power plug of wrong model
reference does not exist
Replace the power plug, see procedure
D/R 003.
CA-COM® or SpeakON®
connector damaged
mechanical or electrical shock
Contact L-ACOUSTICS®.
XLR connector damaged
mechanical shock
Contact L-ACOUSTICS®.
L-NET connector damaged
mechanical shock
Contact L-ACOUSTICS®.
LCD screen, encoder wheel, key,
or LED meter damaged on the
DISPLAY
mechanical shock
Contact L-ACOUSTICS®.
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