ALLEN&HEATH WARNING – HIGH VOLTAGES Power Supply Unit (PSU) work should only be carried out by qualified personnel. We recommend that you use an approved Allen & Heath service centre for all power supply work. Please contact your local Allen & Heath distributor for more details. http://www.allen-heath.
MixWizard Series WZ20S Stereo Audio Mixing Console SERVICE MANUAL Publication No: AP3638
CONTENTS INTRODUCTION, SERVICE AND TECHNICAL SUPPORT.................3 FLIGHTCASING THE CONSOLE & DIMENSIONS .............................4 SPECIFICATIONS & CONNECTIONS .................................................5 ORDERING A MIXWIZARD WZ20S UNIT, OPTIONS & MANUALS ....6 ORDERING SPARE ASSEMBLIES......................................................6 ORDERING SPARE PARTS.................................................................7-8 MONO INPUT BOARD COMPONENT IDENT.................................
Introduction The information presented in this manual is intended for competent technical personnel to carry out service and product support for the MixWizard WZ20S console. We assume that the reader is familiar with the related electronic theory and audio terminology, and is able to carry out basic servicing, faultfinding and repair of audio equipment of this type. Service personnel should also be familiar with audio systems, mains earthing and power requirements, as well as handling precautions.
Flightcasing the Console If the console is to be regularly moved we recommend that it is installed in a foam-lined flightcase. At all times avoid applying excessive force to any knobs, switches or connectors. Dimensions for flightcasing the console are shown below: Dimensions Width Height Depth Desktop ........................ 483mm (19”) ................. 192mm (7.6”).................530mm (20.9”) Rack mounted .............. 483mm (19”) ................. 444mm (17.5”) 10U .......135mm (5.3”) Packed....
Specifications 0dBu = 0.775 Volts rms +4dBu = 1.23V rms 0dBV = 1 Volt rms -10dBV = 316mV rms INTERNAL HEADROOM: NOISE: Measured rms 22Hz to 22kHz ....................................... Channels ........................ +21dB MIC EIN: referred to 150 ohm source ....................................... Mix to output ................... +23dB ................................................................................-128dB MAXIMUM OUTPUT LEVEL: RESIDUAL OUTPUT NOISE: XLR ......................
ORDERING A CONSOLE To order a new MixWizard console please specify the model number and AC mains voltage. MODEL DESCRIPTION ORDER CODE MIXWIZARD WZ20S 4 Mono + 8 Stereo Input Channels WZ20S/volts ORDERING AN OPTION To order an option please specify the model number required.
ORDERING A SPARES KIT It is recommended that the spares kit order code 002-491 is held and maintained by the service agent to enable in-field service repairs to the WZ20S independent of the ALLEN & HEATH factory. Commonly available items such as resistors, capacitors, tools and soldering equipment are not included. The contents of the kit are listed below and are supplied in a cabinet of drawers. Individual spare parts may be ordered. Please quote the description and order code for the part required.
LEDs and Semiconductors: Transistor BC549 NPN Transistor BC638 PNP TO92H IC TL072 Dual Op-Amp Transistor BC637 NPN TO92H IC LM339N Quad Comparator Transistor J111N FET T092B LED 3mm T1 Red IC CMOS 4053B IC Op-Amp NE5532N Transistor 2N4403 PNP IC SSM2142P Bal Out Driver LED Bar Rectangular 12 Way Transistor BC556B PNP LED Rect Green 5X2MM Flat Top LED Rect Red 5X2MM Flat Top IC TL072 Op-Amp SIL Transistor MPSA92 PNP AE0020 AE0037 AE0046 AE0068 AE0071 AE0083 AE0086 AE0117 AE0221 AE0273 AE0302 AE2701 AE3001 A
