Removing The Fader; Checking The Channel Signal Level - ALLEN & HEATH ML5000 User Manual

D3 SAFE / EDIT. This green LED has a different
function according to console operating mode:
Normal The LED lights when the channel has
been made safe from the snapshot and MIDI
automation.
Solo-in-Place The LED lights when the channel
has been made safe from solo-in-place.
Edit Safes Indicates that the channel is safe from
the automation when entered from normal mode, or
safe from solo-in-place when entered from SIP.
Edit Groups The LED lights to indicate that the
channel is assigned to the group.
Preview Snapshots The LED lights to indicate
that the channel is muted in the snapshot memory
being previewed.
D4 PAFL. Press this switch to listen to the
channel signal in the headphones or engineers
monitor without affecting the main outputs.
Either PFL or stereo in-place AFL.
(pre-fade listen) or AFL (after-fade listen) is
selected according to the master section INPUT
PAFL switch P2 . AFL is 'in-place' as it provides a
stereo mix of L and R with C mixed into both. This
lets you listen to the image of the signal in the 3
output main mix using
headphones and monitor.
Latching or momentary action.
provides latching or momentary action depending
on how long it is held down. Press and hold for
longer than 1 second for momentary action.
PAFL override monitor. Pressing any input PAFL
automatically overrides any currently selected
output AFL or monitor source.
restores that selection.
Auto cancel or Add mode.
ADD MODE switch P1 determines if pressing a
channel PAFL cancels or adds to any previous
selection.
Clear all. Pressing the master section CLEAR ALL
switch P3 turns off any PAFL / AFL switches
selected and restores the monitor source.
D5 INPUT METER.
displays the pre-fade signal level.
display signal presence at –26dB, -6, 0 and +6
display normal signal level, and PK (peak) lights
when the signal is within 5dB of clipping.
senses the signal at 4 critical stages in the signal
path, pre-insert, pre-EQ, pre-fader and post-fader,
to warn of potential overload.
example, if the preamp is clipping while signal reads
low due to attenuation through an inserted
processor.
ML5000 User Guide
Either PFL
the console stereo
The switch
Releasing PAFL
The master section
The 5 LED bar meter
SIG lights to
PK
PK can flash, for
D6 VCA GROUP Indicators.
to show which VCA groups the channel is assigned
to. The channel can be assigned to more than one
group. The channel is assigned or removed from a
group using the EDIT GROUPS function in the VCA
master section K . The LEDs function according to
console operating mode:
Normal The LEDs display the current VCA group
assignments.
Preview Snapshots The LEDs display the VCA
group assignments in the snapshot memory being
previewed.
D7 FADER. A 100mm smooth travel K-fader is
fitted providing +10dB gain above the nominal 0dB
operating position. Audio is not passed through the
fader. Instead, its position is read by the console
computer which produces a DC voltage to control
the level of the channel VCA (voltage controlled
amplifier).

Removing the Fader

The vertical, offset shaft design of the fader reduces
the risk of damage through dust and liquid spillage.
The fader should provide long life subject to the
usual wear and tear and not normally require
servicing or replacement. If necessary, access to
the faders is by removal of the fader module from
the top of the console. First unclip and lift away the
plastic ident strip. Undo the fader panel crosshead
screws and lift the module up being careful not to
damage the circuit assemblies and cables.
fader can be unscrewed, its harness unplugged,
and then removed by sliding it out of the assembly.

Checking the Channel Signal Level

When plugging in a new source start with the
channel muted or fader and sends turned down.
Adjust the GAIN control
channel meter reading of '0' with loud moments
lighting '+6'. Select PAD A3 if the signal is still too
high with gain turned down. Reduce the gain if the
red PK LED D5 lights. It may be necessary to re-
adjust the gain if changes are made to the equaliser
or inserted signal processing. If the PK LED lights
with channel meter reading low then check the
channel for correct gain structure, in particular the
equaliser and inserted equipment settings.
Set the master INPUT PAFL switch P2 for PFL
and select the channel PAFL
signal quality in the headphones. The signal is also
displayed on the main VU and LED bar meters
providing finer resolution and dynamic display.
These LEDs light
The
A2 for an average
D4 to check the
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