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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.com/
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Summary of Contents for ALLEN & HEATH WZ20:8:2
- Page 1 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.com/...
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Page 3: Table Of Contents
INTRODUCTION The information presented in this manual is intended for competent technical personnel to carry out service and product support for the MixWizard WZ 20:8:2. We assume that the reader is familiar with the related electronic theory and audio terminology, and is able to carry out basic servicing, fault-finding 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. -
Page 4: Technical Description
TECHNICAL DESCRIPTION The ALLEN & HEATH MixWizard WZ 20:8:2 is a dedicated 8-track rack mount or desk standing mixer with 8 mono inputs and 6 stereo inputs. All mono input channels have a 4 band 2-sweep EQ with 6 individual aux sends and Direct output. -
Page 5: Specification & Connections
SPECIFICATIONS 0 dBu = 0.775 Volts rms 0 dBV = 1 Volt rms HEADROOM: ......+21dB channels CROSSTALK: Referred to driven channel at 1kHz +23dB mix to output Channel fader off ......<-90dB Channel off ......<-90dB MAX OUTPUT: XLR ....+27dBu 2kohm max load jack .... -
Page 6: Dimensions For Flightcasing, Installing The Console
DIMENSIONS The diagrams below give the dimensions for flightcasing the console. INSTALLING THE CONSOLE The MixWizard Series features the ALLEN & HEATH Quick Change Connector (QCC) system. The rear connector module may be hinged and locked into either of two positions: Rear connectors for desktop operation with the control panel sloped at a convenient 15 degrees, or Underside connectors for 19"... -
Page 7: Removing The Connector Circuit Board
REMOVING THE CONNECTOR CIRCUIT BOARD ASSEMBLY Before beginning any service work, remove all power to the unit and disconnect any signal cables where necessary. The rotating connector module must be set for desk top operation to gain access to the cover screws. It is not necessary to disconnect the connector module from the main unit. - Page 8 To completely remove the connector circuit board assembly 4.) First remove the base cover of the main unit to gain more access. Refer to 2 and 3 in the section REMOVING AN INPUT, LEFT or RIGHT CIRCUIT BOARD for details on the removal of the base cover.
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Page 9: Removing A Mono Or Stereo Input, Left Or Right Circuit Board
REMOVING AN INPUT, LEFT or RIGHT CIRCUIT BOARD ASSEMBLY Before beginning any service work, remove all power to the unit and disconnect any signal cables where necessary. The rotating connector module must be set for desk top operation to gain access to the cover. Service work is best carried out with the unit inverted on a clean work surface suitably covered to protect the mixer cosmetics. - Page 10 Access to the input channel circuit board options can be achieved at this stage by carefully cutting and resoldering the link options as necessary. It is not necessary to completely remove the circuit board assembly to change the options. Refer to the section INTERNAL LINK OPTIONS for more details. To completely remove a circuit board assembly 4.) Identify the circuit board assembly to be removed and then cut the buss wires half way between each circuit board.
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Page 11: Internal Link Options
INTERNAL LINK OPTIONS The console is set to satisfy most applications that should be encountered. However, the following internal link options are offered to provide alternative settings for those applications that may require them. Access to the options requires the removal of the rear covers depending on which option settings are to be altered. Refer to the section for removing circuit board assembly on which the link option is located. - Page 12 Phantom Power Disable It is perfectly safe to connect non-phantom powered sources such as dynamic microphones to powered XLR sockets providing that balanced leads and sources are used. The +48V supply is current limited through 6.8k ohm resistors to each XLR to prevent damage. However, you can disable phantom power to selected channels by cutting out links on the rear connector circuit assembly.
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Page 13: Ordering A Console, Spare Parts & Assemblies
ORDERING SPARE PARTS ORDERING A CONSOLE To order a new console unit please specify the model number and AC mains voltage required. MODEL DESCRIPTION ORDER CODE MixWizard 20:8:2 8 Mono + 6 Stereo Input channels WZ 2082/volts MixWizard 16:2 16 Mono Input channels WZ 1602/volts MANUALS AND SUPPORT DOCUMENTATION DESCRIPTION... - Page 14 DESCRIPTION ORDER CODE Fixings: Screw 4AB x 5/16" Pan Pozi Black AB0057 Screw M2.5 x 4mm Pan Pozi Black AB2944 Screw M3 x 4mm Pan Pozi Black AB0233 Screw M3 x 8mm Pan Pozi Black AB0073 Screw M3 x 6mm TT Pan Pozi Black AB0071 Screw M3 x 10mm CSK Pozi Black AB0093...
- Page 15 POWER SUPPLY: Mains lead IEC-2pin EURO AH0205 Mains lead IEC-3pin UK AL0206 Mains lead IEC-3pin US (C33) AL0323 Mains Fuse 20mm T315mA (UK,EU) AL0349 Mains Fuse 20mm T630mA (USA,CAN) AL0297 Transformer 30VA AM0918 IC Adjustable Regulator 783 (+48V DC) AE0214 IC Regulator 7815 (+15V DC) AE0047 IC Regulator 7915 (-15V DC)
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Page 16: Front & Rear Panels
FRONT & REAR PANELS ALLEN & HEATH 2E-8SM... -
Page 17: Transformer & Power Wiring
XXX SWITCH...
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