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WZ20S
User Guide
Options
The WZ20S is designed to offer the utmost flexibility to satisfy your application without
modification. However, the following internal options are provided to allow customisation
to satisfy the more specialist applications. This work requires access to the internal
assemblies and resoldering of circuit card links and should be carried out by competent
technical personnel only. Further information and details are printed in the WZ20S
Service Manual, available from your service agent, or by contacting ALLEN & HEATH
technical support.
Internal Configuration Link Options
Mono channel AUX options
The pre-fade sends are set post-EQ, post-ON as
standard. Links on the mono circuit cards can be resoldered to reconfigure pre-
EQ and/or pre-ON as required.
Stereo channel AUX options
The stereo channel aux sends sum the channel
left and right signals as standard. Links can be resoldered so that the left signal
feeds sends 1, 3, 5, and the right feeds 2, 4, 6. One pair of links affects all pre-
fade sends, another all post-fade.
Mono channel DIRECT outputs
These are sourced post channel fader as
standard. A link on each card can be resoldered to reconfigure pre-fader. The
direct out pre-fade source is the same as that configured to feed the aux sends.
EXT input level option
The external inputs are set for -10dBV line level as
standard. These can be reconfigured for +4dBu operation by cutting track links
on the connector card.
DIM switch function
The DIM switch is set to mute the local monitor as
standard. This can be reconfigured to attenuate the signal by 20dB by cutting a
pair of track links on the right master circuit card.
Remote control of the DIM function
The right master circuit card provides
solder pads to wire to the 25 pin REMOTE connector so local monitor DIM can
be activated by an external switch. Alternatively it can be wired to a mono card
so that pressing ON, PFL, or raising a switched fader can automatically mute
the signal. This can be used to mute the studio loudspeakers when the
presenter is on-air or checks his own microphone using PFL.
REMOTE user connector
The blanking plate may be replaced with a standard
25 pin chassis mount female D-connector for custom wiring.
Internally Fitted Option Kits
SYS-LINK output
The blanking plate can be replaced with a 25 pin D-
connector with circuit card. This provides access to all the console outputs and
is compatible with any ALLEN & HEATH console already fitted with the SYS-
LINK expander system.
RIAA option
Up to three dual RIAA preamp circuit cards can be wired to the
connector assembly for direct connection to magnetic cartridge turntables. Each
card provides two stereo channels.
Switched fader option
The standard mono and stereo faders can be
replaced by high grade Alps K-faders with fitted micro switches. These can be
wired to the 25 pin user connector to provide a remote start facility.
