Instruction/ maintenance manual of the product SPX20 LA Audio Electronic
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STEREO SOURCE SELECTOR/PREA MPLI FIER OPERATION MANUAL Version - 1 April 2000.
Page 2 CONTENTS Page 1. Intr oduction 3 2. Instal lation 4 2.1 Inspection and un-pack ing 4 2.2 Operat ing environment 4 2.3 CE standards 4 2.4 Power requirement s 4 2.5 Signal levels 5 2.6 External connections 6-7 3. Warranty 8 4. Description of controls 9-10 4.
Page 3 1.0 INTRODUCTION The SPX20 is a six input st ereo source selector designed to ex tend the number of inputs and range of monitor ing f acilities available on a typical mixing console.
Page 4 2.0 INSTA LLA T ION IMPO RTA NT : PLEA SE REA D THIS SECT ION BEFO RE USING THE SPX20 2.1 INSPECTIO N A ND UNPA CKING The SPX20 has been car efully packed at our factor y in a carton designed to withstand handling in tr ansit.
Page 5 • Please check that your unit is correctly rated for the voltage in the country of operation. If the fuse r equires chang ing at any time please ensure t he correct f use is fitt ed. An incorrect fuse could cause damage t o the unit and may constitute a fire hazard.
Page 6 Pin 1 = Screen Pin 2 = Hot (+) Pin 3 = Cold (-) PUSH Fig 2.6.3: Pin ar rangem ent for XLR inputs on t he SPX20 Pin 1 Screen Signal ground Pin 2 Hot Signal + Pin 3 Cold Signal - For unbalanced operation j oin pins 1 and 3 and connect to Screen (signal ground) and use pin 2 as Hot (signal +) .
Page 7 Plugging into the inserts jacks on t he front panel breaks the signal from the rear panel XLRs INPU T 2 & 3 These are balanced inputs on T RS jack s - see Fig 2.6. 3 For ubalanced operation wire as described above for Input 1 inserts or use a mono jack plug.
Page 8 3.0 WA RRA NTY Your LA Audio SPX20 has been manuf actured t o a high standard using quality com ponents. If correct ly installed and operat ed the unit should g ive years of problem free oper ation.
Page 9 4.0 DESCRIPTIO N OF CONTROLS 4.1 INPUTS SECTION INPUT 1 Left & Right sockets Thes e are insert points f or Input 1. Plugging into these connec tors break s the signal from Input 1's rear panel XLRs . They are intended to allow a quick and easy way of tem porarily connecting an external piece of equipm ent to the SPX20.
Page 10 4.2 OUTPUT SECT ION BA LANCE control This control allows adjus tment of the stereo c entre position. T he centre detent position gives equal lef t and right levels. Tur ning BALANCE fully CCW canc els all right output signals and vic e versa. BALANCE aff ects OUT PUT 1 & 2 and Headphones .
Page 11 5.0 A PPL ICA TIONS The m ajority of mixing consoles, even quite expensive models of fer only 2 or possibly 3 monitoring inputs. So if you want to simultaneously connect a CD player, DAT machine, stereo cassett e deck, 2 t rack analog ue tape machine etc.
Page 12 Fig 5.1. 1 Connecting the SPX 20 as the main monit oring cont roller 5.2 A S A MONITOR EXTENDER If you prefer t o keep contr ol of the cont rol room m onitors within the mix ing console the SPX20 can be connected as shown in Fig 5.
Page 13 6.0 CIRCUI T DESCRIPTION TRIM Left Right Select #1 LR MIX • • • Mix amp Tape Send L • Mix amp Tape Send R • • BALANCE • • MONO DIM LR • • • Left On-Off #1 • LEVEL 1 Rig.
Page 14 7.0 SPECIFI CA TIONS INPUTS 1 electronically balanced, 20k Ω , XLR-F , pin 2 = hot 2 & 3 electronically balanced, 20k Ω , 1/4" TRS, T ip = hot 4, 5 & 6 unbalanced, 20k Ω , R.
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If you already are a holder of LA Audio Electronic SPX20, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime LA Audio Electronic SPX20.
However, one of the most important roles played by the user manual is to help in solving problems with LA Audio Electronic SPX20. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device LA Audio Electronic SPX20 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
