SoundCraft LX7-2 User manual

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Technical Manualechnical Manual
echnical Manualechnical Manual
echnical Manual

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© Harman International Industries Ltd. 2004
All rights reserved
Parts of the design of this product may be protected by worldwide patents.
Part No. ZM0289-01
Issue: 1
Soundcraft is a trading division of Harman International Industries Ltd. Information in this manual
is subject to change without notice and does not represent a commitment on the part of the
vendor. Soundcraft shall not be liable for any loss or damage whatsoever arising from the use of
information or any error contained in this manual.
No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any
form or by any means, electronic, electrical, mechanical, optical, chemical, including photocopying
and recording, for any purpose without the express written permission of Soundcraft.
Harman International Industries Limited
Cranborne House
Cranborne Road
POTTERS BAR
Hertfordshire
EN6 3JN
UK
Tel: [phone]
Fax: [phone]
http://www.soundcraft.com
IMPORTANT
Please read this manual
carefully before using
your mixer for the first time.

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ContentsContents
ContentsContents
Contents
INTRODUCTIONINTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION 1 - 11 - 1
1 - 11 - 1
1 - 1
FeaturFeatur
FeaturFeatur
Featureses
eses
es 1 - 21 - 2
1 - 21 - 2
1 - 2
WW
WW
Warar
arar
arrantyranty
rantyranty
ranty 1 - 31 - 3
1 - 31 - 3
1 - 3
SAFETY SYMBOL GUIDESAFETY SYMBOL GUIDE
SAFETY SYMBOL GUIDESAFETY SYMBOL GUIDE
SAFETY SYMBOL GUIDE 1 - 51 - 5
1 - 51 - 5
1 - 5
INSTINST
INSTINST
INSTALLAALLA
ALLAALLA
ALLATIONTION
TIONTION
TION 1 - 51 - 5
1 - 51 - 5
1 - 5
IMPORIMPOR
IMPORIMPOR
IMPORTT
TT
TANT SAFETY WANT SAFETY W
ANT SAFETY WANT SAFETY W
ANT SAFETY WARNINGSARNINGS
ARNINGSARNINGS
ARNINGS 1 - 61 - 6
1 - 61 - 6
1 - 6
WARNINGS 1 - 7
General Precautions 1 - 8
Handling and Transport 1 - 8
Power Cable 1 - 8
Signal Levels 1 - 8
Mains InstallationMains Installation
Mains InstallationMains Installation
Mains Installation 1 - 81 - 8
1 - 81 - 8
1 - 8
General Wiring Procedures 1 - 8
Initial Wiring Considerations 1 - 9
Audio Wiring 1 - 9
Shielding 1 - 9
Points to Remember 1 - 10
WORKING SAFELWORKING SAFEL
WORKING SAFELWORKING SAFEL
WORKING SAFELY WITH SOUNDY WITH SOUND
Y WITH SOUNDY WITH SOUND
Y WITH SOUND 1 - 101 - 10
1 - 101 - 10
1 - 10
Setting Up & TSetting Up & T
Setting Up & TSetting Up & T
Setting Up & Trr
rr
roubleshootingoubleshooting
oubleshootingoubleshooting
oubleshooting 1 - 101 - 10
1 - 101 - 10
1 - 10
Initial set-up 1 - 10
Troubleshooting 1 - 10
Connecting LeadsConnecting Leads
Connecting LeadsConnecting Leads
Connecting Leads 1 - 131 - 13
1 - 131 - 13
1 - 13
Audio Connector PinoutsAudio Connector Pinouts
Audio Connector PinoutsAudio Connector Pinouts
Audio Connector Pinouts 1 - 141 - 14
1 - 141 - 14
1 - 14
DimensionsDimensions
DimensionsDimensions
Dimensions 1 - 151 - 15
1 - 151 - 15
1 - 15
BLOCK DIAGRAMBLOCK DIAGRAM
BLOCK DIAGRAMBLOCK DIAGRAM
BLOCK DIAGRAM 1 - 161 - 16
1 - 161 - 16
1 - 16
USING THE CONSOLEUSING THE CONSOLE
USING THE CONSOLEUSING THE CONSOLE
USING THE CONSOLE 1 - 181 - 18
1 - 181 - 18
1 - 18
Overview 1 - 19
Mono Input Channel 1 - 20
Stereo Input Channel 1 - 24
Master Section 1 - 25
Mark-up Sheet 1 - 27
TYPICAL SPECIFICATYPICAL SPECIFICA
TYPICAL SPECIFICATYPICAL SPECIFICA
TYPICAL SPECIFICATIONSTIONS
TIONSTIONS
TIONS 1 - 281 - 28
1 - 281 - 28
1 - 28
CIRCUIT DIAGRAMSCIRCUIT DIAGRAMS
CIRCUIT DIAGRAMSCIRCUIT DIAGRAMS
CIRCUIT DIAGRAMS 2 - 12 - 1
2 - 12 - 1
2 - 1
PP
PP
PARAR
ARAR
ARTS LISTTS LIST
TS LISTTS LIST
TS LIST 3 - 13 - 1
3 - 13 - 1
3 - 1

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NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
This Class A digital apparatus meets the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

1 - 1
INTRODUCTION

1 - 2
Features
The LX7-II combines the essential Soundcraft live mixer qualities with basic recording-oriented features, in a compact frame that s
light enough for one person to carry yet easy to configure and use. This makes it especially suitable for multi-purpose use in venues
such as small halls and community centres, while its direct channel outputs make the LX7-II an ideal choice for bands who need
a live desk that can double up in the studio.
Housed in a choice of 16, 24 or 32 channel frame, LX7-II provides 24, 32 or 40 inputs - with no less than 13 separate bus outputs
including mix, 4 groups, a dedicated mono bus for centre speaker clusters, side or rear fills, and six auxiliary busses.
There are also 8, 16 or 24 direct outs, depending on the frame size of your console.
LX7-II s balanced mic inputs all use Soundcraft new GB30 padless mic preamp providing 60dB of gain and 22dBu of headroom.
Each input also includes 4 band EQ with two swept mid frequency controls. In addition, EQ In/Out switch and steep 18dB/Octave
High Pass Filter, allow effective audio control in difficult venues whilst the six auxiliary sends are pre-post switchable in pairs from
each channel, providing a maximum of 4 pre-fader and six post-fader. This makes LX7-II equally applicable for foldback - heavy
performance or in situations where more effects are required.
LX7-II groups section houses two further stereo inputs - with EQ, auxiliaries for keyboards or stereo recording devices - as well as
two FX returns. All four groups are routable to mix and include 12 segment bargraph metering for accurate monitoring and inserts.
Six auxiliary masters on rotary controls also included AFL soloing.
In the master section there is talkback provision to all pre-fade auxiliaries and the mix. Phantom power in banks of four, and a two
track return for pre-show music are also present. A two-track to mix switch allows the engineer to play CD s over the main PA
whilst back-stage set-up is going on, with one press of a button. The mix is also routable to the separate mono bus if mono PAs are
required.
LX7-II is built in a rugged wedge-shaped steel chassis with an internal power supply, professional all-metal jackfield and connectors
on the rear of the console. All inputs and outputs are balanced.
Applications incluse : Gigging Bands, Small installations, Small venues, Theatres, Houses of Worship and Live & studio recording.

1 - 3
Warranty
1 Soundcraft is a trading division of Harman International Industries Ltd.
End User means the person who first puts the equipment into regular operation.
Dealer means the person other than Soundcraft (if any) from whom the End User purchased
the Equipment, provided such a person is authorised for this purpose by Soundcraft or its
accredited Distributor.
Equipment means the equipment supplied with this manual.
2 If within the period of twelve months from the date of delivery of the Equipment to the End
User it shall prove defective by reason only of faulty materials and/or workmanship to such
an extent that the effectiveness and/or usability thereof is materially affected the Equipment
or the defective component should be returned to the Dealer or to Soundcraft and subject to
the following conditions the Dealer or Soundcraft will repair or replace the defective
components. Any components replaced will become the property of Soundcraft.
3 Any Equipment or component returned will be at the risk of the End User whilst in transit
(both to and from the Dealer or Soundcraft) and postage must be prepaid.
4 This warranty shall only be available if:
a) the Equipment has been properly installed in accordance with instructions contained in
Soundcraft's manual; and
b) the End User has notified Soundcraft or the Dealer within 14 days of the defect appear-
ing; and
c) no persons other than authorised representatives of Soundcraft or the Dealer have
effected any replacement of parts maintenance adjustments or repairs to the Equipment;
and
d) the End User has used the Equipment only for such purposes as Soundcraft recom-
mends, with only such operating supplies as meet Soundcraft's specifications and otherwise
in all respects in accordance Soundcraft's recommendations.
5 Defects arising as a result of the following are not covered by this Warranty: faulty or
negligent handling, chemical or electro-chemical or electrical influences, accidental
damage, Acts of God, neglect, deficiency in electrical power, air-conditioning or humidity
control.
6. The benefit of this Warranty may not be assigned by the End User.
7. End Users who are consumers should note their rights under this Warranty are in addition to
and do not affect any other rights to which they may be entitled against the seller of the
Equipment.

1 - 4

1 - 5
INSTALLATION
Foryourownsafetyandto
avoidinvalidationofthe
warrantypleasereadthis
sectioncarefully.
SAFETYSYMBOLGUIDE
For your own safety and to avoid invalidation of the warranty all text marked with these symbols should be read carefully.
CAUTIONS
The lightning flash with arrowhead symbol, is intended to alert the user to
the presence of un-insulated dangerous voltage within the products
enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to persons.
WARNINGS
The exclamation point within an e uilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
NOT S
Contain important information and useful tips on the operation of your
e uipment.
H ADPHON SSAF TYWARNING
Contain important information and useful tips on headphone outputs and
monitoring levels.

1 - 6
IMPORTANTSAFETYWARNINGS
THISUNITMUSTB  ARTH D
Undernocircumstancesshouldthemainsearthbedisconnectedfromthe
mainslead.
The wires in the mains lead are coloured in accordance with the following code:
Earth: Green and Yellow (Green/Yellow - US)
Neutral: Blue (White - US)
Live: Brown (Black - US)
As the colours of the wires in the mains lead may not correspond with the coloured markings identifying the terminals in your plug,
proceed as follows:
The wire which is coloured Green and Yellow must be connected to the terminal in the plug which is marked with the letter
E or by the earth symbol.
The wire which is coloured Blue must be connected to the terminal in the plug which is marked with the letter N.
The wire which is coloured Brown must be connected to the terminal in the plug which is marked with the letter L.
Ensure that these colour codings are followed carefully in the event of the plug being changed.
Toavoidtheriskoffire,replacethemainsfuseonlywiththecorrectvalue
fuse,asmarkedontherearpanel.
Theinternalpowersupplyunitcontainsnouserserviceableparts.Refer
allservicingtoaqualifiedserviceengineer,throughtheappropriate
Soundcraftdealer.