Soundcraft SM20 USER GUIDE
SM20 Contents 1
2 SM20 Contents
© Harman International Industries Ltd. 1998
All rights reserved
Parts of the design of this product may be protected by worldwide patents.
Part No. ZM0226
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 repre-
sent a commitment on the part of the vendor. Soundcraft shall not be liable for
loss or damage whatsoever arising from the use of information or any error con-
tained in this manual.
No part of this manual may be reproduced, stored in a retrieval system, or trans-
mitted, 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.
It is recommended that all maintenance and service on the product should be car-
ried out by Soundcraft or its authorised agents. Soundcraft cannot accept any lia-
bility whatsoever for any loss or damage caused by service, maintenance or repair
by unauthorised personnel.
Harman International Industries Limited.
Cranborne House,
Cranborne Road,
Cranborne Industrial Estate,
Potters Bar,
Herts.,
EN6 3JN
UK.
Tel: 01707 665000
Fax: 01707 660482
SM20 Contents i
SSMM2200
CCoonntteennttss
1. Introduction 1.1
Introduction 1.2
Warranty 1.2
2. Installation 2.1
Dimensions and Configurations 2.2
Precautions and Safety Instructions 2.3
Mains Installation 2.4
Connections 2.6
Jumper Options 2.7
Block Diagrams 3.1
Input Module 3.2
Output Module 3.3
Master Module 3.4
Functional Description 4.1
Input Module 4.2
Output Module 4.5
Master Module 4.8
Specifications 5.1
ii SM20 Contents
SM20 Introduction 1.1
SSMM2200
IInnttrroodduuccttiioonn
1
1.2 SM20 Introduction
IInnttrroodduuccttiioonn
Congratulations on purchasing a Soundcraft console.
The SM20 is a dedicated stage monitor console, designed to take account of the
trend towards the use of in-ear monitoring systems, and draws on elements from
the respected range of Soundcraft SM consoles.
SSyysstteemm OOvveerrvviieeww
l 32, 40, 48 and 56-module frames
l Mono input with wide-range, low-noise input pre-amp
l Mic split output on each channel
l Combination of mono and stereo sends giving from 20 mono sends to
7 stereo and 6 mono sends, with individual pre/post fader switching
l 8 Mute groups
l Optional VU Meterbridge
l Balanced audio inputs and outputs throughout, on XLRs
l MIDI control of BSS Varicurve Equaliser
PPoowweerr SSuuppppllyy
l The SM20 uses the CPS800 Power Supply.
SM20 Introduction 1.3
WWaarrrraannttyy
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 defec-
tive 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 instruc-
tions contained in Soundcrafts manual; and
b) the End User has notified Soundcraft or the Dealer within 14 days of the
defect appearing; 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 recommends, with only such operating supplies as meet
Soundcrafts specifications and otherwise in all respects in accordance
Soundcrafts 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 SM20 Introduction
SM20 Installation 2.1
SSMM2200
IInnssttaallllaattiioonn
2
2.2 SM20 Installation
DDiimmeennssiioonnss aanndd CCoonnffiigguurraattiioonnss
Mono Input
Output
Master
48ch 56ch
795.80 (31.33")
722.80 (28.46")
373.40 (14.70")
277.88 (10.94")
25.0 (1.00")
125.70
(4.95")
32ch frame
40ch frame
48ch frame
56ch frame
Overall Width
1366mm (53.8“)
1620mm (63.78“)
1874mm (73.78")
2128mm (83.78")
Console
40ch
SM20 Installation 2.3
PPrreeccaauuttiioonnss aanndd SSaaffeettyy IInnssttrruuccttiioonnss
GGeenneerraall PPrreeccaauuttiioonnss
Avoid storing or using the mixing console in conditions of excessive heat or cold,
or in positions where it is likely to be subject to vibration, dust or moisture. Do
not use any liquids to clean the fascia of the unit: a soft dry brush is ideal. Use only
water or ethyl alcohol to clean the trim and scribble strips. Other solvents may
cause damage to paint or plastic parts.
Avoid using the console close to strong sources of electromagnetic radiation (e.g.
video monitors, high-power electric cabling): this may cause degradation of the
audio quality due to induced voltages in connecting leads and chassis. For the
same reason, always site the power supply away from the unit.
Caution!
In all cases, refer servicing to qualified personnel.
HHaannddlliinngg aanndd TTrraannssppoorrtt
The console is supplied in a strong carton or crate. If it is necessary to move it any
distance after installation it is recommended that this packing is used to protect it.
Be sure to disconnect all cabling before moving. If the console is to be regularly
moved we recommend that it is installed in a foamlined flightcase. At all times
avoid applying excessive force to any knobs, switches or connectors.
PPoowweerr SSuupppplliieess && ccaabblleess
Always use the power supply and cable supplied with the mixer: the use of alter-
native supplies may cause damage and voids the warranty; the extension of power
cables may result in malfunction of the mixing console.
Warning!
Always switch the power supply off before connecting or disconnecting
the mixer power cable, removing or installing modules, and servicing. In
the event of an electrical storm, or large mains voltage fluctuations,
immediately switch off the PSU and unplug from the mains.
Warning!
Use only the Soundcraft CPS800 or CPS2000 power supply with your
SM20 console.
SSiiggnnaall LLeevveellss
It is important to supply the correct input levels to the console, otherwise signal to
noise ratio or distortion performance may be degraded; and in extreme cases,
damage to the internal circuitry may result. Likewise, on all balanced inputs avoid
sources with large commonmode DC, AC or RF voltages, as these will reduce the
available signal range on the inputs. Note that 0dBu = 0.775V RMS.
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