Allen&Heath ML5000 SERVICE MANUAL - Manual (Page 10)

ML5000 Service Manual 9
MONO INPUT and EQ. The input preamp
matches microphone or line level signals to the
console. The sweepable high pass filter removes
unwanted low frequency sounds below the selected
frequency. The channel insert is post filter, pre EQ.
A swept frequency 4 band equaliser provides
shelving high and low bands with adjustable shelf
frequency, and fully parametric high and low mid
bands with adjustable centre frequency and Q. The
filter and EQ can be independently switched in or
out.
GRP/AUX SENDS. This section provides controls
for the group routing and auxiliary sends. Controls
1-8 function according to the setting of the mode
switches in the master section. These configure
group routing switches and independent post-fade
aux sends for FOH (front-of-house) application, or
pre/post switchable sends for stage monitor
application. Controls 9-16 can be configured as
mono or stereo pre/post aux sends.
MAIN MIX SENDS. A single switch routes the
channel signal to the main L, R and C outputs. The
balance between the three outputs is determined by
the LCRplus pan and blend controls. Pan can also
be switched in or out of the group routing for stereo
or mono groups.
INPUT FADERS. Includes the channel fader,
mute, signal meter and PAFL monitoring. The 8
VCA group assignments are displayed. VCA and
mute group editing and channel safe selection is
performed using the mute switch with green
safe/edit indicator below.
STEREO INPUT and EQ. The input preamp
accepts two stereo sources with independent
control of each. This allows selection of either or
mixing together both sources. A fixed frequency 4
band equaliser provides shelving high and low
bands and two bell mid bands. The EQ can be
switched in or out.
GRP/AUX 1-8 MASTERS. These are the fader
masters for channel sends 1-8, configurable using
mode switches as fixed level groups or as variable
level pre or post-fade auxes. The output can be
routed to the main mix through LCRplus controls to
create sub groups. Led meters display the pre-fade
mix levels.
AUX 9-16 MASTERS. These are the fader
masters for channel sends 9-16.
ROTARY AUX MASTERS. These are the rotary
masters for channel post-fade aux sends 1-8. They
provide the independent effects sends when the
fader masters are configured as groups. They still
function when the fader masters are configured as
pre/post auxes but would not normally be required.
MAIN MIX FADERS. Provides separate master
faders and mutes for the main L, R and C outputs.
A mode switch configures the C output as the
engineers wedge monitor feed for the stage monitor
application.
MATRIX. This section provides all the controls for
the 8 matrix outputs, including the source and
master rotaries.
VCA GROUPS. These are the VCA group master
faders, mutes and PAFL monitor switches.
Channels are assigned to the groups using the edit
key. The normal fader operating level is marked ‘0’.
MUTE GROUPS. These are the master keys that
mute all channels assigned to the group. Channels
are assigned using the edit key.
SNAPSHOT MEMORIES. Provides the controls to
store, recall and preview the 128 onboard
memories, and edit channel safes. Mute settings
and/or VCA assignments can be disabled from the
snapshots.
HEADPHONES / MONITOR. Provides source
selection and independent control of the
headphones and local monitor outputs.
SOLO-IN-PLACE. Pressed with the shift key this
puts the console into SIP mode ready to solo any
channel when its mute key is pressed.
PAFL CONTROL. This section controls how the
intelligent PAFL system functions and provides the
clear all key.
OSC/NOISE GENERATOR. Enables and selects
a 1kHz tone or pink noise which can be routed to
any output for line up or system testing.
INTERCOM. The console talkback mic and
headphones can be interfaced to a ClearCom
compatible intercom system so eliminating the need
for a separate intercom headset.
TALKBACK. Pressing the talk switch routes the
talkback mic to any output with its TB enable switch
selected. The mic input is duplicated on the rear
panel for plugging in hand held microphones.
GRP/AUX 1-8 METERS. These moving coil VU
meters display the grp/aux 1-8 outputs.
LRC/PAFL METERS. The main L,R and C outputs
are simultaneously displayed on both VU and led
bar meters. These switch to display any PFL or
AFL when selected. The display is mono or mono +
stereo depending on source. The large call lamp
lights to warn when the intercom is signalled.
AUX 9-16 / MTX 1-8 METERS. These meters
display either the aux 9-16 outputs or matrix 1-8
levels according to the setting of the meter select
switch near section.