Manual Allen-Heath ML-5000 (page 27 of 60) (English)

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ML5000 User Guide 27

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. Either PFL

(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 the console stereo

headphones and monitor.

Latching or momentary action. The switch

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. Releasing PAFL

restores that selection.

Auto cancel or Add mode. The master section

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. The 5 LED bar meter

displays the pre-fade signal level. SIG lights to

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. PK

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. PK can flash, for

example, if the preamp is clipping while signal reads

low due to attenuation through an inserted

processor.

D6 VCA GROUP Indicators. These LEDs light

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. The

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 A2 for an average

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 D4 to check the

signal quality in the headphones. The signal is also

displayed on the main VU and LED bar meters

providing finer resolution and dynamic display.

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Allen-Heath ML-5000 Manual

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