Allen&Heath ML5000 SERVICE MANUAL
ALLEN&H
EATH
WARNING – HIGH VOLTAGES
Power Supply Unit (PSU) work should only
e carried out by qualified personnel.
b
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/
ALLEN&HEATH
ML5000
Dual Function Live Sound Console
SERVICE MANUAL
Publication AP3737
Introduction
This service manual provides technical information on the Allen & Heath ML5000 audio console.
Included is the technical specification, system block diagram, circuit schematics with board layouts,
and a spare parts list. Information on the power supply is available in a separate publication. Only
technically qualified service personnel should carry out service work on the console and its power
supply.
Whilst we believe the information in this manual to be reliable we do not assume responsibility for
inaccuracies. We also reserve the right to make changes in the interest of further product
development.
We are able to offer further product support through our world-wide network of approved dealers
and service agents. You can also access our Web site on the Internet for information on our
product range and further technical support. To help us provide the most efficient service please
keep a record of the console serial number, and date and place of purchase to be quoted in any
communication regarding this product. The serial number is located on the rear panel.
Check out our home site for information on the company and its pedigree, our full product range
and our design philosophy.
www.allen-heath.com
ML5000 Service Manual AP3737 Issue 2
Copyright © 2002 Allen & Heath. All rights reserved
This product complies with the European Electromagnetic
Compatibility directives 89/336/EEC & 92/31/EEC and the
European Low Voltage Directives 73/23/EEC & 93/68/EEC.
This product has been tested to EN55103 Parts 1 & 2 1996 for use in
Environments E1, E2, E3, and E4 to demonstrate compliance with the
protection requirements in the European EMC directive 89/336/EEC. During
some tests the specified performance figures of the product were affected.
This is considered permissible and the product has been passed as
acceptable for its intended use.
Allen & Heath has a strict policy of ensuring all products are tested to the
latest safety and EMC standards. Customers requiring more information
about EMC and safety issues can contact Allen & Heath.
NOTE: Any changes or modifications to the console not approved by Allen &
Heath could void the compliance of the console and therefore the users
authority to operate it.
Manufactured in the United Kingdom by Allen & Heath
Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
2 ML5000 Service Manual
Contents
Important Safety Instructions ............................4
Mains Plug Wiring Instructions .........................5
General Precautions ......................................... 5
ML5000 Key Features ...................................... 6
Front Panel Layout............................................7
Rear Panel Layout ............................................ 8
Functional Description ......................................9
Installing the Console......................................10
The Expander Sidecar ....................................11
The MPS14 Power Supply.............................. 14
Technical Specifications .................................16
System Block Diagram....................................17
Connector Types and Wiring .......................... 19
Gain Structure.................................................20
Internal Jumper Options .................................21
MIDI ................................................................22
Operating Software Technical Support........... 24
Servicing the Input Faders..............................25
Servicing the Master Faders........................... 27
Base Removal and Internal Assemblies......... 29
Removing a Mono Input Assembly ................. 30
Removing the Master Distribution................... 31
Servicing the Meterbridge............................... 32
Servicing the MPS14 Power Supply............... 33
Ordering Consoles and Accessories ..............34
Ordering Assemblies.......................................35
Ordering Spare Parts...................................... 37
Channel Cue Sheet (Blank) ............................42
Master Cue Sheet (Blank) ..............................43
Service Notes (Blank) ..................................... 44
TECHNICAL DRAWINGS .................. Section D
ML5000 Service Manual 3
Important Safety Instructions
WARNINGS - Read the following before proceeding :
CAUTION
ATTENTION: RISQUE DE CHOC ELECTRIQUE – NE PAS OUVRIR
Read instructions: Retain these safety and operating instructions for future reference. Adhere to
all warnings printed here and on the console power unit. Follow the operating
instructions printed in the user guide and the power unit user guide.
Do not remove covers: Operate the power unit with its covers correctly fitted. Refer any service work
to competent technical personnel only.
Power sources: Connect the power unit to a mains power only of the type described in the
User Guide and marked on the rear panel. Use the power cord with sealed
mains plug appropriate for your local mains supply as provided with the
console. If the provided plug does not fit into your outlet consult your service
agent for assistance.
Power cord routing: Route the power cord so that it is not likely to be walked on, stretched or
pinched by items placed upon or against it.
Grounding: Do not defeat the grounding and polarisation means of the power cord plug.
Do not remove or tamper with the ground connection in the power cord.
WARNING: This equipment must be earthed.
Water and moisture: To reduce the risk of fire or electric shock do not expose the power unit or
console to rain or moisture or use it in damp or wet conditions. Do not place
containers of liquids on it which might spill into any openings.
Ventilation: Do not obstruct the ventilation slots or position the console or power unit
where the air flow required for ventilation is impeded. If the console is to be
operated in a flightcase ensure that it is constructed to allow adequate
ventilation.
Heat and vibration: Do not locate the power unit in a place subject to excessive heat or direct
sunlight as this could be a fire hazard. Locate the console and its power unit
away from any equipment which produces heat or causes excessive
vibration.
Servicing: Switch off the equipment and unplug the power cord immediately if it is
exposed to moisture, spilled liquid, objects fallen into the openings, the power
cord or plug become damaged, during lightening storms, or if smoke, odour
or noise is noticed. Refer servicing to qualified technical personnel only.
Installation: Install the console in accordance with the instructions printed in the User
Guide. Do not connect the output of power amplifiers directly to the console.
Use audio connectors and plugs only for their intended purpose.
4 ML5000 Service Manual
Important Mains Plug Wiring Instructions.
The power unit is supplied with a moulded mains plug fitted to the AC mains
power lead. Follow the instructions below if the mains plug has to be
replaced.
The mains lead wires are coloured in accordance with the following code:
TERMINAL
L
LIVE BROWN BLACK
N
NEUTRAL BLUE WHITE
E
EARTH GND GREEN & YELLOW GREEN
The wire which is coloured Green and Yellow must be connected to the
terminal in the plug which is marked with the letter E or with the Earth symbol.
This appliance must be earthed.
The wire which is coloured Blue must be connected to the terminal in the plug
which is marked with the letter N.
The wire which is coloured Brown must be connected to the terminal in the
plug which is marked with the letter L.
Ensure that these colour codes are followed carefully in the event of the plug
being changed.
General Precautions
WIRE COLOUR
European USA/Canada
Damage : To prevent damage to the controls and cosmetics avoid placing heavy
objects on the control surface, scratching the surface with sharp objects, or
subjecting the console to rough handling and vibration.
Environment : Protect from excessive dirt, dust, heat and vibration when operating and
storing. Avoid tobacco ash, smoke, drinks spillage, and exposure to rain and
moisture. If the console becomes wet, switch off and remove mains power
immediately. Allow to dry out thoroughly before using again.
Radiation : To avoid induced noise and interference pickup do not operate the console
close to strong sources of electromagnetic radiation such as power supplies,
video monitors, lighting cables and dimmers.
Cleaning : Avoid the use of chemicals, abrasives or solvents. The control panel is best
cleaned with a soft brush and dry lint-free cloth. Stubborn marks can be
removed using a cloth dampened with isopropyl alcohol. Do not leave
marking tape stuck to the console for long periods of time as the adhesive
can degrade and leave a sticky residue. The faders, switches and
potentiometers are lubricated for life. The use of electrical lubricants on these
parts is not recommended. Refer to the power unit user guide for instructions
on cleaning its ventilation filters.
Transporting : The console should be transported in the original packing or purpose built
foam lined flightcase. Protect the control surface from damage during transit.
The console is a large and heavy item. To avoid injury ensure adequate man
power and precaution when lifting or moving the console.
ML5000 User Guide 5
ML5000 Key Features
The Allen & Heath ML5000 is a large format VCA equipped dual function live sound console. It
can be quickly configured for front-of-house (FOH) or stage monitor mixing. As one console
suitable for both applications it is equally well suited to installation, rental and touring. It offers an
IO capability and feature set that satisfies the latest trends in live sound engineering, in particular
the growing number of inputs and outputs for multi-speaker house and monitor systems, demands
of stereo in-ear monitoring, 3 speaker LCR imaging, advanced grouping and automation. The
design ensures on-the-road durability, a clear layout for easy walk up and go operation, and no
compromise audio performance.
Inputs and Outputs
• 3 Standard frame sizes: 32+4, 40+4, 48+4 (mono + stereo channels)
• 32, 40, 48 mono mic/line inputs with inserts and direct outputs
• 4 dual stereo line inputs
• 24 input sidecar to expand to a maximum 96 inputs
• Main Left, Right and Centre outputs with inserts, C configurable as the engineers monitor
• 8 Groups, 16 Auxes: Group/Aux 1-8 and Aux 9-16 with faders and inserts, Aux 1-8 with rotaries
• Matrix 1-8 with inserts and external inputs
• 2-Track monitor input and recording send
• Stereo headphones and local monitors
• Dual mic talkback input
• ClearCom compatible intercom interface
Groups and Automation
• 8 VCA groups with mutes and PAFL monitoring
• 8 audio groups with LCRplus™ subgrouping
• 8 mute groups
• 128 snapshot memories for mute and/or VCA assignment store, recall and preview
• Solo-in-place with all-clear and toggle-last
• MIDI mute on/off, snapshot recall and dump in/out control
• Channels can be made safe independently from the automation and solo-in-place
Processing and Control
• 4-Band full sweep mono EQ with fully parametric mids, 4-band fixed frequency stereo EQ
• Sweepable high pass filter
• LCRplus™ 3 speaker imaging system
• Protected mode switching to configure the console for FOH or monitor application
• Intelligent PAFL system with all-clear, PFL/in-place AFL, priority, auto-cancel/add mode…
• Assignable talkback and intercom
• 1kHz tone and pink noise generator for system line-up and testing
• Full console monitoring and extensive metering of inputs, mix busses and outputs
6 ML5000 Service Manual
Front Panel Layout
ML5000 Service Manual 7
Rear Panel Layout
8 ML5000 Service Manual
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.
ML5000 Service Manual 9
Installing the Console
Weights 32 Channel 84 kg (185 lbs)
40 Channel 96 kg (211 lbs)
48 Channel 110 kg (242 lbs)
24 Channel sidecar 45 kg (95 lbs)
MPS14 psu 6 kg (13 lbs)
HEADPHONES SOCKETS
UNDER ARMREST
130
ML5000-24SC = 831
LAMP SOCKETS
298
872
ML5000-32 = 1596
ML5000-40 = 1851
ML5000-48 = 2106
440
FC 76.2
482.6
263
90
REMOVABLE RACK EARS
2U HEIGHT
Refer to the power supply user guide
for safety and installation instructions.
Heed all warnings printed in the user
guide and on the power unit.
Refer to the sidecar user guide for
instructions on connecting the sidecar
expander to the console.
CAUTION: Ensure adequate
ventilation around the power supply
unit. Do not operate it where it is
subject to excessive heat, for
example in direct sunlight or next to
power amplifiers. Use forced air
cooling such as rack fans if it is
operated in a confined or hot space.
10 ML5000 Service Manual
The Expander Sidecar
channels. Do not connect more than two sidecars.
The following is supplied with each sidecar:
1x MPS14 Power Supply Unit with User Guide MPS14/n
1x Mains cord with moulded plug suitable for your local supply n = volts
1x DC power cable 2.8 metres long 002-583
3x 37way Audio Cables 2.8 metres long 002-617
1x 9way Logic Cable 2.8 metres long AL4155
The Allen & Heath ML5000-24SC Sidecar is the 24
mono input channel expander for the ML5000
console. It is free standing and does not need to be
mechanically fixed to the main console.
Interconnection is by means of multiway cables to
link the audio signals and control logic. It is supplied
with its own power supply unit independent of the
console. The input channel strip is identical to the
main console with all functions available. The
groups and snapshots are controlled from the main
console. Up to two gooseneck lamps (part AL4061)
may be plugged into the rear of the meterbridge.
Note: This sidecar may be used with the ML5000
only. It is not suitable for use with other consoles or
as a stand alone console. One or two sidecars may
be connected allowing a maximum 96 input
Connecting the Sidecar to the Console
Diagram 1 shows the cable routing for connecting the sidecars to the ML5000. Refer to Diagram
2 for connecting one sidecar. Refer to Diagram 3 for connecting two sidecars.
Connect the three audio OUTPUT connectors 1 to the main console EXPANDER INPUT using
the three 37way 1 to 1 shielded cables provided. We recommend that you label the cables A, B
and C to avoid them being swapped if replugged. If you are connecting a second sidecar plug its
OUTPUT into the first sidecar INPUT connectors 2 . Plug the LOGIC connector 3 into the main
console LOGIC connector 1 for one sidecar, or 1 and 2 for two sidecars. Plug the power supply
DC cable into connector 5 .
Note: To maintain correct channel assignment do not reverse the interconnecting cables. Make
sure the cable plug locking screws are correctly tightened.
Turning the Console and Sidecars On and Off
Make sure the DC power cables and audio and logic interconnecting cables are correctly plugged
in and locked. Turn all power supplies on or off together. Alternatively, turn the sidecar supplies
on first followed by the main console, and turn the console off first followed by the sidecars. Do not
turn off any supply during normal console operation.
Note: For normal console operation make sure the rear panel RS232 switch 4 is set to its
NORMAL position. It will not function correctly if left in its RS232 position.
ML5000 Service Manual 11
Diagram 1
Diagram 2
MAIN CONSOLE
INPUT LOGIC
ABC 1
Diagram 3
MAIN CONSOLE
INPUT LOGIC
ABC 1
INPUT 1 OUTPUT2OUTPUT INPUT
CONNECTING ONE SIDECAR
ML5000
POWER
CONNECTING TWO SIDECARS
ML5000
POWER
2
20
GAIN
- 10 10
100
50 200
30
20Hz
7kHz
3k
2kHz 20kHz
-15 +15
1.2
0.6 2.5
2kHz
1k
500 5k
400Hz 20kHz
-15 +15
1.2
0.6 2.5
100Hz
60
30 250
20Hz 1kHz
-15 +15
100Hz
50
20Hz 200Hz
-15 +15
AUX
1
OO +6
AUX
2
OO +6
AUX
3
OO +6
AUX
4
OO +6
AUX
5
OO +6
AUX
6
OO +6
AUX
7
OO +6
AUX
8
OO +6
LEV
9
OO +6
PAN
10
OO +6
LEV
11
OO +6
PAN
12
OO +6
LEV
13
OO +6
PAN
14
OO +6
LEV
15
OO +6
PAN
16
OO +6
+
LCR
BLEND
LR C
PAN
LR
24
+48V
PAD
40
20dB
O
4060
HPF
400
10k
HF
Q
3k
HM
Q
120
LM
150
LF
EQ IN
PRE
PRE
PRE
PRE
PRE
PRE
PRE
PRE
9-10
STEREO
PRE
11-12
STEREO
PRE
13-14
STEREO
PRE
15-16
STEREO
PRE
=
MAIN
MIX
=
MUTE
SAFE/EDIT
PAFL
PK
+6
0
10
-6
SIG
5
1
0
2
3
5
4
5
10
6
20
7
8
VCA
30
GROUP
40
OO
12 ML5000 Service Manual
Combining Sidecar Power Supplies for Backup
If you are connecting two sidecars then you can link the power supplies together for redundant
supply backup. One MPS14 supply is capable of running both sidecars together should the other
fail. You need to order the short 0.7 meter DC power cable (part 002-584) for linking.
Note: Do not link the main console power supply to the sidecar supply in this way. One supply is
not capable of running both the main console and its sidecar should the other fail. You should
order a spare power supply with your console in this case. Make sure the power supplies are
positioned next to each other and using the same mains distribution.
RS232 Code Update
A rear panel RS232 port is provided. This is used for loading new operating software into the
sidecar from a PC. It is not used for any other function. Check our Web site www.allen-heath.com
for details on the latest version of ML5000 operating software and instructions on loading it into the
console.
Note: The sidecar settings are archived using a MIDI or RS232 dump from the main console.
There is no need to archive the sidecar settings separately.
Sidecar Audio Connections
The following information is provided for reference only. It is not necessary to wire special cables
to connect the sidecar to the console. Standard 1 to 1 wired 37way cables are provided. The
audio signals are balanced and operate at a nominal –2dBu line level.
13 GRP 4+
12 AUX 1+
11 AUX 2+
10 AUX 3+
9 AUX 4+
8 AUX 5+
7 AUX 6+
6 PFL+
5 AFL+
4 nc
3 PFL DC
2 AFL DC
nc 23
nc 22
nc 21
1 0V (PAFL)
nc 20
18 L+
19 0V (CHS)
L- 37
R- 36
17 R+
GRP 1- 35
16 GRP 1+
GRP 2- 34
15 GRP 2+
GRP 3- 33
14 GRP 3+
GRP 4- 32
AUX 1- 31
AUX 2- 30
AUX 3- 29
AUX 4- 28
AUX 5- 27
AUX 6- 26
PFL- 25
AFL- 24
18 C+
19 0V (CHS)
C- 37
AFL L- 36
16 GRP 5+
17 AFL L+
GRP 5- 35
15 GRP 6+
GRP 7- 33
GRP 6- 34
14 GRP 7+
GRP 8- 32
13 GRP 8+
12 AUX 7+
AUX 7- 31
AUX 8- 30
11 AUX 8+
AUX 9- 29
10 AUX 9+
9 AUX 10+
AUX 10- 28
AUX 11- 27
8 nc
AUX 11+ 26
7 nc
AUX 12- 25
6 nc
AUX 12+ 24
5 nc
AUX 13- 23
CBA
13 nc
12 PAUX 1+
11 PAUX 2+
10 PAUX 3+
9 PAUX 4+
8 PAUX 5+
7 PAUX 6+
6 PAUX 7+
5 PAUX 8+
4 nc
3 nc
2 nc
nc 23
nc 22
nc 21
nc 20
1 nc
2 AUX 15+
AUX 16- 20
19 0V (CHS)
1 AUX 16+
nc 36
nc 35
nc 34
nc 33
nc 37
nc 32
PAUX 1- 31
PAUX 8- 24
PAUX 4- 28
PAUX 3- 29
PAUX 5- 27
PAUX 6- 26
PAUX 2- 30
PAUX 7- 25
4 AUX 13+
3 AUX 14+
AUX 15- 21
AUX 14- 22
14 nc
15 nc
16 nc
17 nc
18 nc
ML5000 Service Manual 13
The MPS14 Power Supply
The slimline MPS14 power supply uses linear post-regulated switch mode technology to generate the DC
voltages required by the console. It will operate from a wide range of ac mains input voltages. Full protection and
thermally controlled fan cooling ensures the power unit will operate consistently. The MPS14 also has a built in
combiner for connection to a second supply for backup.
+18V -18V +10V +48VON PROTECT
ADVANCED TECHNOLOGY / HIGH POWER DELIVERY / AUTO COMBINING
T5A 250V
FUSE
T
MADE IN ENGLANDS/No
DO NOT OBSTRUCT VENTILATION OPENI NGS.
DO NOT OPEN. NO USER SERVICEABLE PARTS INSIDE.
THIS APPARATUS MUST BE EARTHED BY THE POWER CORD.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
MAINS INPUT
500W MAX100V - 230V.AC 47-63 Hz ~
MPS14
CONSOLE POWER SUPPLY
PIN 1 = +10V @ 5A
PIN 2 = +17V @ 7A
PIN 3 = A GND
PIN 4 = A GND
PIN 5 = D GND
PIN 6 = +48V @ 1A
PIN 7 = -17V @ 7A
A DIVISION OF HARMAN INTERNATIONAL I NDUSTRIES LTD
CAUTION
AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE
WITH SAME TYPE AND RATING. DISCONNECT SUPPLY BEFORE CHANGING FUSE.
ATTENTION: REMPLACER LE FUSIBLE AVEC UN DES MEMES CARACTERISTIQUES.
COUPER L'ALIMENTA TION AVANT DE CHA NGER LE FUSIBLE.
Power Supply Installation
Free standing
The MPS14 can be operated as a free-standing unit without requiring any special cooling arrangement, but
should not be accidentally or deliberately covered in any way. Always stand the unit on a firm flat surface well
away from any soft furnishings or carpet.
Rack mounting
The MPS14 is designed as a 19 inch rack mount unit and will occupy 2U (3.5 inches) of rack space.
An important consideration when rack-mounting the unit is the need for natural convection of air flow over the
whole unit.
Good ventilation below the unit, in the floor or back of the rack, will ensure a path for continuous air flow.
Other equipment in the rack which is known not to produce a significant amount of heat should be mounted
below the unit. Equipment which also relies on good airflow within the rack (i.e. most power amplifiers and other
power supplies) should be given due consideration and some space should be provided between such units and
between the MPS14 unit. Forced convection, by means of a fan-tray, may be desirable in this situation.
Location
As with any power supply that contains switch mode technology, it is preferable to provide a degree of physical
isolation of the unit from other equipment, particularly that which carries low level audio signals, to avoid any
possible interference pick-up. For this reason the unit is provided with a long (2.9m) output cable to enable it to
be positioned away from the mixing console. For the same reason, when rack-mounting it is preferable to avoid
locating the unit adjacent to signal processing equipment.
Earthing
Finally, some consideration should be given to the earthing arrangement of the system, at the centre of which is
the console and the MPS14. The console chassis is earthed, to the mains earth, via the power supply. When
rack-mounting the MPS14 care should be taken to avoid any possible “ground loops” in the system which would
introduce audible hum or buzz to otherwise clean audio signals. Ground loops may occur where signal
processing equipment patched to the console, has its signal earth connected to the equipment chassis. A ground
loop is formed if the chassis of the signal processing equipment and the MPS14 chassis are in electrical contact
through the fixing rails they share in the rack. The MPS14 has audio 0V and mains earth connected internally. If
a ground loop is formed operation of the ground lift switch on the rear panel of the MPS14 may improve the
situation.
14 ML5000 Service Manual
MPS14 Technical specifications
Mains Input Voltage Range 100 - 240 ± 10% VAC @ 47-63 Hz auto-sensing
Power consumption (max.) 500W
Mains Fuse: 100 - 240 V~ T 5.0A/250V
Internal Fuses:
PCB Ident Fuse type
F1 (+12V) T 6.3A 250V 20mm
F2 (+48V) T 2A 250V 20mm
F18 (aux psu) T 500mA 250V 20mm
DC Outputs
DC Voltage Rail Output Current
+17 VOLTS 7A Max.
-17 VOLTS 7A Max.
+12 VOLTS 5A Max.
+48 VOLTS 500mA Max.
CONSOLE POWER SUPPLYMPS14
ML5000
DIRECT
DIRECT
CHASSIS
GROUND
DIRECT
OUT
OUT
INSERT
INSERT
SEND
SEND
RET
RET
IN
IN
DC POWER IN
OUT
INSERT
SEND
RET
IN
RS232
DC Output Socket Pin Connections
Overall Dimensions
Front Panel: 482mm x 88mm 19 inch 2U
Width (excluding rack ears): 440mm 17.30 inches
Height including feet: 90mm 3.5 inches
Depth: 260mm 10.25 inches
Weight: 6Kg 13 pounds
PIN 1 = +10V @ 5A
PIN 2 = +17V @ 7A
PIN 3 = A GND
PIN 4 = A GND
PIN 5 = D GND
PIN 6 = +48V @ 1A
PIN 7 = - 17V @ 7A
Pin No: Connection
1 +12 Volts
2 +17 Volts
3 A GND
4 A GND
5 D GND
6 +48 Volts
7 -17 Volts
MPS14
MPS14
Cable Assemblies
Assembly Description A&H Part no:
DC cable
2.9m MPS14 to ML5000 console cable assembly
002-583
DC LINK cable 0.5m MPS14 to MPS14 PSU “LINKING” cable assembly 002-584
ML5000 Service Manual 15
ML5000 Technical Specifications
0dBu = 0.775 Vrms, +4dBu = 1.23 Vrms
Operating Levels
Channels......................................... 0dBu Headroom +21dB
Mix .................................................. -2dBu Headroom +23dB
Frequency Response Referred to 1kHz at +4dBu
Mic to main output (+40dB)............. 20Hz to 30kHz +0/-0.5dB
Line to main output (0dB)................ 20Hz to 30kHz +0/-0.5dB
Distortion @1kHz +14dBu
THD+noise ...................................... < 0.01%
CMRR Common mode rejection @1kHz
Mic (+40dB)..................................... > 80dB
Mic + Pad (0dB) .............................. > 50dB
Crosstalk Referred to driven channel @1kHz
Channel to channel ......................... > -100dB
Mute shutoff .................................... > -85dB
Fader shutoff................................... > -90dB
Noise Performance Measured rms 22Hz to 22kHz unweighted
Mic EIN with 150 ohm source ......... -128dB
Residual output noise ..................... < -94dBu (-98dB SN)
Mix noise, nothing routed................ < -84dBu (-88dB SN)
Mix noise, 24 channels routed ........ < -80dBu (-84dB SN)
Metering
Reading 0................. +4dBu at XLR outputs
LED meters .............. Peak reading, 3 colours
VU meters ................ Ave reading, Illuminated moving coil
Peak indicators ........ 5dB before clip, multi-point sensing
Input meters ............. 5 bar LED (signal, -6, 0, +6, peak)
Group mix meters .... 5 bar LED (signal, -6, 0, +6, peak)
Group/Mtx meters .... VU
L,R,C meters............ VU and 16 bar LED
Lamp Connectors x4
Connector ....................................... XLR-F 4pin
Rating.............................................. 12V 400mA max
Channel Filters
Slope ............................................... 12dB/oct high pass
Frequency ....................................... 20Hz to 400Hz
variable
Mono Equaliser
HF................. +/-15dB, 2kHz to 20kHz shelf
HM................ +/-15dB, 500Hz to 15kHz bell, Q = 0.6 to 2.5
LM ................+/-15dB, 35Hz to 1kHz bell, Q = 0.6 to 2.5
LF ................. +/-15dB, 20Hz to 200Hz shelf
Stereo Equaliser
HF................. +/-15dB, 12kHz shelf
HM................ +/-15dB, 2.5kHz bell
LM ................+/-15dB, 250Hz bell
LF ................. +/-15dB, 60Hz shelf
Power Supply Model MPS14
Type ........................... External 2U rack or floor mount
Mains input................. 100-230V 50/60Hz universal input
Power consumption.... 500W
Full protection and fan cooling
Dimensions Width.............. Depth ...... .....Height
32 Channel 1596 (62.8”) ... 872 (34.3”) ....298 (11.7”)
40 Channel 1851 (72.9)..... 872.......... .....298
48 Channel 2106 (82.9”) ... 872.......... .....298
Sidecar 831 (32.7”) ..... 872.......... .....298
MPS14 psu 483 (19”) ........ 260 (10.2”) ....
Weights 32 Channel..... 84 kg (185 lbs)
40 Channel..... 96 kg (211 lbs)
48 Channel..... 110 kg (242 lbs)
24 Sidecar...... 45 kg (99 lbs)
MPS14 psu .... 6 kg (13 lbs)
INPUTS:
Mic (Pad out)................ XLR.................balanced, pin2+........ 2k ohm ..............variable -60 to -10dBu ........ Max +11dBu
Mic (Pad in).................. ........................ ................................. >20k ohm..........variable -40 to +10dBu .......Max +31dBu
Stereo A ...................... TRS jack .........balanced, tip+ ........... >20k ohm..........variable -18 to +6dBu ......... Max +27dBu
Stereo B ...................... XLR................. balanced, pin2+........ >20k ohm..........variable –18 to +6dBu ........ Max +27dBu
2-Track......................... TRS jack .........balanced, tip+ .......... >20k ohm..........+4dBu ................................. Max +25dBu
Matrix Ext in ................. TRS jack......... balanced, tip+........... >20k ohm..........+4dBu ................................. Max +25dBu
INSERTS:
Input send .................... TRS jack.........ground comp, tip+ .... <50 ohm............0dBu ...................................Max +21dBu
Input return................... TRS jack ......... balanced, tip+........... >20k ohm..........0dBu ...................................Max +21dBu
Output send ................. TRS jack.........ground comp, tip+ .... <50 ohm............-2dBu .................................. Max +21dBu
Output return................ TRS jack .........balanced, tip+........... >20k ohm..........-2dBu .................................. Max +21dBu
OUTPUTS:
L,R,C............................ XLR.................balanced, pin2+........ <75 ohm............+4dBu ................................. Max +26dBu
Grp/Aux 1-16................ XLR................. balanced, pin2+........ <75 ohm............+4dBu................................. Max +26dBu
Matrix 1-8 ..................... XLR................. balanced, pin2+........ <75 ohm............+4dBu ................................. Max +26dBu
Post Aux 1-8 ................ TRS jack.........ground comp, tip+ .... <50 ohm............-2dBu .................................. Max +21dBu
Direct out...................... TRS jack ......... ground comp, tip+ .... <50 ohm............0dBu ................................... Max +21dBu
2-Track......................... TRS jack .........ground comp, tip+ .... <50 ohm ............+4dBu ................................. Max +21dBu
Local Monitor ............... TRS jack.........ground comp, tip+ .... <50 ohm............0dBu ................................... Max +21dBu
Headphones................. TRS jack ......... tip left, ring right........ for stereo headphones >30 ohms
16 ML5000 Service Manual
System Block Diagram (1 of 2)
MONO CHANNEL
PAD
PRE-FADE
POST-FADE
GRP
ODD
EVEN
GAIN
+
-
DIRECT OUT
OPTION LINKS
J5
POST-FADE
J4
PRE-FADE
J6
POST-TRIM
J9
J10
+48V
INPUT
DIRECT OUT
STEREO CHANNEL
+
L
-
INPUT A
R
L
INPUT B
R
+
+
+
-
-
-
GAIN
GAIN
PRE-FADE
POST-FADE
GRP
FREQ
FILTER
ON
ON
ODD
EVEN
HPF IN
(AUX1 ONLY)
L
R
M
L
R
M
FADER
VCA
POST-MUTE
PRE
STEREO
J3
J2
J1
VCA GROUPS
MUTE
J7
AUX9
MUTE GROUPS
SNAPSHOTS
PAN BLEND
L
J8
AUX 11 to 16
SAME AS 9,10 SHOWN
AUX10
AUX1
METER
PEAK
INSERT
SEND
RETURN
+
-
4 BAND EQUALISER
LF LM HM HF
AUX2
PRE
GRP/AUX 3 TO 8
SAME AS 1,2 SHOWN
GRP2
GRP2
AUX 2
POST AUX2
SET MASTER mode SWITCH
FOR EITHER AUX OR GROUP
PRE
GRP1
AUX1
GRP1
POST AUX1
AUX9
LEV 9-10
EQ IN
AUX10
PAN
PRE-FADE AUX
OPTION LINKS
POST-EQ
PRE-EQ
PRE-INSERT
FADER
VCA
POST-MUTE
R=J2
L=J1
PAN
AUX10
VCA GROUPS
MUTE
J3
PRE
STEREO
MUTE GROUPS
SNAPSHOTS
+
BAL BLEND
L RLRC
+
AUX 11 to 16
SAME AS 9,10 SHOWN
METER
PEAK
AUX9
9-10 LEV
+
PRE-FADE AUX
OPTION LINKS
POST-EQ
PRE-EQ
SOURCE
MONO L
+
MONO R
PRE
AUX1
GRP1
AUX2
4 BAND EQUALISER
LM HM HF
LF
PRE
GRP2
GRP/AUX 3 TO 8
SAME AS 1,2 SHOWN
EQ IN
PAFL LOGIC
LCR+
RLRC
GRP PAN ON
MONO
STEREO
PAFL LOGIC
LCR+
GRP BAL ON
MONO
STEREO
C
C
PAFL
PFL
L
+
R
+
MAIN
MIX
L AFL
R AFL
L MIX
R MIX
C MIX
PAFL
PFL
L
+
R
+
MAIN
MIX
L AFL
R AFL
L MIX
R MIX
C MIX
AUX1
GRP1
POST AUX1
OSC/NOISE/TALKBACK
PINK NOISE
1kHz OSC
TRIM
GRP2
AUX 2
POST AUX2
SET MASTER mode SWITCH
FOR EITHER AUX OR GROUP
OSC/NOISE TO TB
DIM
+48V
1
TRIM
TB
+
TALK TO TB
+
-
AUX9
INTERCOM
TALK TO INTERCOM
AUX10
INTERCOM IN/OUT
SIDETONE
TRIM
LISTEN
+
TO PHONES
LAMP
CALL
TB MIC
Disable
2
MONITOR DIM
MONITOR DIM
ML5000 Service Manual 17
System Block Diagram (2 of 2)
POST AUX
L MIX
R MIX
C MIX
TB ENABLE
TB
mode
GRP
AUX
SET mode FOR EITHER:
GROUP = SWITCHED ROUTING
AUX = VARIABLE LEVEL+PRE/POST SWITCH
POST AUX 1-8
MIX
TB
TB
TB
MIX
MASTER
L MIX
R MIX
WEDGE mode
C MIX
GRP/AUX 1-16
INSERT
SEND
RETURN
AFL LOGIC
POST AUX OUT
LEFT
INSERT
SEND
RETURN
RIGHT
INSERT
SEND
RETURN
C
CENTRE
INSERT
SEND
RETURN
PEAK
PEAK
PEAK
PEAK
+
-
+
-
+
-
METER
+
-
LCR+
BLEND
GRP/AUX
L
AFL
MAIN
MIX
(1-8 ONLY)
BAL
BAL
L AFL
R AFL
L MIX
R MIX
C MIX
GRP/AUX
OUT
LEFT
OUT
EXT IN
MATRIX
+
-
GRP/AUX1
GRP/AUX 2
GRP/AUX 3
GRP/AUX 4
GRP/AUX 5
GRP/AUX 6
GRP/AUX 7
GRP/AUX 8
TB
L
R
C
TB ENABLE
AFL LOGIC
FADER
MUTE
MUTE GROUPS
SNAPSHOTS
PAN
L RLR C
AFL
L AFL
R AFL
FADER
MUTE
MUTE GROUPS
SNAPSHOTS
LEVEL
POST-FADE
FADER
FADER
MUTE
MUTE
MUTE GROUPS
SNAPSHOTS
MUTE GROUPS
SNAPSHOTS
J1
J2
J3
J4
PRE-INSERT
PRE-INSERT
POST-FADE
R
C METER
L
2TRK
OUT
R
RIGHT
BAL
OUT
CENTRE
BAL
OUT
AFL LOGIC
MUTE
SEND
INSERT
RETURN
MUTE GROUPS
SNAPSHOTS
+
-
AFL
L AFL
R AFL
BAL
OUT
MATRIX
L AFL
R AFL
WEDGE MON
TB DIM
INPUT PAFL
OUTPUT AFL
L METERS
R METERS
C METERS
WEDGE MON
METERS 1-8
METERS 9-16
GRP/AUX
MATRIX
GRP/AUX
METER SELECT
FROM INTERCOM
PHONES
MONO
LOCAL
+
MUTE
+
L
R
HEADPHONES
+
L
LOCAL
MONITOR
R
PFL
PFL MIX
L AFL MIX
R AFL MIX
MONITOR SOURCE
LR
C
L
R
C
L
2TRK
IN
R
+
+
+
-
+
-
+
2TRK
PAFL LOGIC
L
R
C
PFL
TRIM
AFL
PFL
MONITOR
18 ML5000 Service Manual
Connector Types and Wiring
ML5000 Service Manual 19
Gain Structure (Reprinted from User Guide)
How the levels between the different signal stages
are set up is referred to as the gain structure. For
best performance it is important that the connected
source signals are matched to the ‘normal operating
level’ of the console. Similarly the levels of the
connected amplifiers and destination equipment
should be correctly matched to the console outputs.
If set too high then the signal peaks will be clipped
resulting in distortion, and if set too low then the
signal-to-noise performance will be degraded
resulting in excessive background hiss and noise.
Using the Meters. The ML5000 provides metering
at all important stages through the signal chain. For
best results operate the console with the LED bar
meters averaging around ‘0’ allowing the loudest
moments to reach ‘+6’. Reduce the gain if the red
peak LEDs start to flash. Note that the peak leds
light 5dB before actual clipping to warn that you are
nearing distortion and should reduce gain. The
LED bar meters have a peak response with fast
attack and slow release so that fast musical
transients are accurately displayed. The VU meters
have a slower attack so that the average levels are
better displayed. Both types of metering are useful
in live sound mixing.
Matching a Source to the Console. Start by
turning down the channel fader and send levels to
prevent unexpected loud volumes reaching the
main speakers and monitors. Adjust the GAIN
control for an average ‘0’ reading on the channel
meter. Press PAFL (in PFL mode) to listen to the
signal using headphones, local or wedge monitor,
and to view its level on the main LED and VU
meters. Once the gain is correctly set you can raise
the levels to bring the channel into the mix. Note
that you may need to adjust the gain if you make
significant changes to the EQ. Make sure that any
equipment inserted into the channel is set to
operate around 0dBu line level. It is best to first set
the gain with inserted signal processors such as
compressors switched to bypass.
Matching the Console to Destination Equipment.
The console produces a standard XLR output level
of 0dBu for a meter reading of ‘0’ and +22dBu
maximum to allow plenty of headroom for driving
equipment hotter. If you are connecting directly to a
sensitive power amplifier it is advisable to turn down
its input trim control if the normal console level is
too high. Simply turning down the console output
faders degrades the output stage noise
performance and reduces the resolution of the fader
movement. The output faders are best operated
around ‘-10’ to ‘0’ for loudest average volume
required. This allows plenty of additional headroom
if you need it. If you are connecting to crossovers
or speaker managers then set these for normal
0dBu operating level and use their level trimmers to
correctly match to the amplifiers.
Terminology. The normal operating level is the
optimum signal level for best console performance,
indicated by ‘0’ meter readings. The channels
operate at 0dBu and the mix stages at –2dBu for
extended headroom. Headroom is the extra level
available above normal to allow for loud peaks
before the signal becomes clipped resulting in
audible distortion. The signal-to-noise ratio (SNR)
is the difference measured in dB between normal
level and residual noise floor (hiss) produced by the
console electronics. The dynamic range is
headroom + SNR representing the maximum signal
range possible from quietest to loudest.
Using the VCA Groups. Assigning a channel to
one or more VCA groups lets those group faders
control the level of its VCA element. Each fader
provides up to +10dB boost. Note that the channel
VCA allows a maximum combined fader boost of
+10dB. Any more is simply ignored. It is best to
operate the VCA group faders around their nominal
‘0’ position. You can also use a VCA group to
reduce the overall level of a hot mix without having
to adjust all the channel faders.
Final word… A little care with setting gain
structure throughout the signal chain will give you
the very best performance and most manageable
control of the mix.
+30
+20
+10
0dBu
-10
-20
-30
-40
-50
-60
-90
INPUT
GAIN
INSERT
0dBu
EQUALISER
+/-15dB+60/-10 dB
CHANNEL
VCA
FADER
DIR OUT
0dBu
VCA GROUPS
PAN/BLEND
LRLR
-3dB law
MIXCHANNEL
MIX HEADROOM
MIX
INSERT
C
-2dBu
+23dB
VUMIX
FADER
OUTPUT
CLIPPING LEVEL
OUTPUT
DYNAMIC RANGE
112dB
NOISE FLOOR
+22dBu
HEADROOM
+22dB
0dBu
SNR
signal-to-noise
-90dB
-90dBu
20 ML5000 Service Manual
Channel Jumper Options
2-TRACK Jumper Options
Several link options are available to satisfy user
preferences. These require removal of the console
base panels and replugging of 2way jumpers on the
circuit boards. It is not necessary to remove
assemblies from the console. To avoid damage to
the internal assemblies this work should be carried
out by competent technical personnel.
Pre-fade Source. The source for the pre-fade aux
sends may be changed by repositioning jumper
links on each mono and stereo channel. The
default factory setting is pre-insert, pre-EQ, postmute. This is usually preferred when mixing
monitors from front-of-house. Select the source as
pre-insert, pre-EQ, or post-EQ by setting one
jumper. Select pre or post mute by setting another.
Set pairs of links on the stereo channels to affect
left and right signals.
Direct Output Source. The default factory setting
is post-fade. This can be changed to pre-fade.
Pre-fade follows the source as described above.
An additional option sources the output from the
AUX1 send control. This provides a post-fade
direct output with level trim. If preferred, the
channel feed to the AUX1 rotary master can be
disabled so that adjusting the direct output level
does not feed the mix. Note that this does not
affect the AUX1 send to the fader master when aux
mode is selected. Select the source as pre-fade,
post-fade, or post-fade with AUX1 trim by setting its
jumper. Set another jumper to turn the AUX1 feed
to the rotary master on or off as required.
The 2-track output is sourced from the main LR mix.
The factory default setting is post master LR faders.
If you want to source pre-insert, pre-fader then
replug the internal jumper links on the LR MIX
circuit board as shown below. For stereo recording
from a three channel LCR mix, or by creating a new
balance from the groups, use the MATRIX outputs
instead.
FADER
LR MIX PCB
CONNECTORS
2-TRK SOURCE
GROUND
PRE-INSERT
POST-R FADER
PRE-INSERT
POST-L FADER
RIGHT
LEFT
FADER
CONNECTORS
FADER
CONNECTORS
MONO CHANNEL
AUX1>OFF
AUX1>ON
AUX1>DIR
POST-FADE
PRE-FADE
POST-EQ
PRE-EQ
PRE-INSERT
POST-MUTE
PRE-MUTE
AUX1 TO
ROTARY MASTER
DIR OUT SOURCE
PRE-FADE SOURCE
PRE-FADE MUTE
STEREO CHANNEL
POST-EQ
PRE-EQ R
POST-EQ
PRE-EQ L
POST-MUTE
PRE-MUTE
PRE-FADE SOURCE
RIGHT
PRE-FADE SOURCE
LEFT
PRE-FADE MUTE
ML5000 Service Manual 21
HEX MUTE HEX MUTE
00 GRP/AUX 1 50 STEREO 1
01 GRP/AUX 2 51 STEREO 2
02 GRP/AUX 3 52 STEREO 3
03 GRP/AUX 4 53 STEREO 4
04 GRP/AUX 5 54 MAIN L
05 GRP/AUX 6 55 MAIN R
06 GRP/AUX 7 56 MAIN C
07 GRP/AUX 8
08 AUX 9
09 AUX 10
0A AUX 11
0B AUX 12
0C AUX 13
0D AUX 14
0E AUX 15
0F AUX 16
10 MATRIX 1
11 MATRIX 2
12 MATRIX 3
13 MATRIX 4
14 MATRIX 5
15 MATRIX 6
16 MATRIX 7
17 MATRIX 8
MIDI Mutes
Pressing any input or output channel MUTE switch
transmits a MIDI Note On message. Similarly,
receiving a MIDI Note On message will turn the
associated channel mute on or off, unless the
channel has been made automation safe.
Console mutes are mapped to MIDI Note numbers
as shown in the table. Running status is supported
on receive and transmit.
Transmit. Pressing a channel MUTE switch
transmits the following Note On messages:
9n cc vv 9n cc 00
Where n = console MIDI channel number
cc = input or output channel number
vv = 3FH for mute off, 7FH for mute on
Receive. The console responds to the following
MIDI Note On message:
9n cc vv (00 is ignored)
Where vv < 40 = mute off,
40 <= vv <= 7F = mute on
Snapshot Memories
HEX MUTE HEX MUTE
20 CH 1 38 CH 25
21 CH 2 39 CH 26
22 CH 3 3A CH 27
23 CH 4 3B CH 28
24 CH 5 3C CH 29
25 CH 6 3D CH 30
26 CH 7 3E CH 31
27 CH 8 3F CH 32
28 CH 9 40 CH 33
29 CH 10 41 CH 34
2A CH 11 42 CH 35
2B CH 12 43 CH 36
2C CH 13 44 CH 37
2D CH 14 45 CH 38
2E CH 15 46 CH 39
2F CH 16 47 CH 40
30 CH 17 48 CH 41
31 CH 18 49 CH 42
32 CH 19 4A CH 43
33 CH 20 4B CH 44
34 CH 21 4C CH 45
35 CH 22 4D CH 46
36 CH 23 4E CH 47
37 CH 24 4F CH 48
Recalling a snapshot will transmit a MIDI Program
Change message. Receiving a Program Change
message will recall a snapshot.
Snapshot numbers 1 to 128 are mapped to MIDI
Program Change numbers 0 to 127. Running
status is supported on receive and transmit.
Transmit and Receive. The message format is:
Cn pp
Where n = console MIDI channel number
pp = console snapshot number 00 to 7F
MIDI AFL Messages
SysEx message strings are transmitted each time
an output channel AFL switch is selected or
released. These are for use with BSS and dbx
speaker management systems to automatically
select the remote control surface associated with
the output being AFL monitored.
BSS Omnidrive
F0 00 20 18 7F 20 tx_event F7
dbx Drive Rack
F0 00 01 1E 7F 7F 20 tx_event F7
These messages are subject to further development
and addition. Please check the Allen & Heath Web
site for the latest information.
22 ML5000 Service Manual
Archiving the Console Settings
The console settings can be saved to an external
device such as a MIDI sequencer or data archiver
using the dump out facility. Saved settings can be
loaded back into the console using dump in. This is
ideal when you want to archive the settings to use
at a later date, for example a re-run of a previous
performance. You can also use the dump facility to
program additional ML5000 consoles, for example
when setting up duplicate shows or swapping
consoles around. Simply link MIDI OUT from one to
MIDI IN of the other and action the dump out facility.
Settings which are archived :
9 Current mute settings
9 Current Mute group assignments
9 Current VCA group assignments
9 Automation safes
9 Solo-in-Place safes
9 All snapshot memories
Settings which are not archived :
8 Current console operating mode
8 Current PAFL selection and settings
8 Store and auto-increment on/off
MIDI Dump Out
Connect the console to a suitable MIDI archiving
device. Set the same MIDI channel number on
both. Check the rear switch is set to MIDI. Hold
down SHIFT M9 and press STORE M4 . The
console dumps the current settings and memory
contents using a SysEx message string. During this
time dPo is displayed. Note that this operation
can take up to 10 seconds during which time the
console mutes, assignment, SIP and P/AFL
operations will be interrupted.
MIDI Dump In
Connect the console to the MIDI archiving device.
Set the same MIDI channel number on both. Check
the rear switch is set to MIDI. Start the process
using the MIDI archiver. The console current
settings and memory contents are overwritten.
During this time dPI is displayed. Note that this
operation can take a while during which time the
console mute, assignment, SIP and PAFL
operations will be interrupted.
MIDI Dump Message Format
The format for dump out and in is identical. The
dump data string is made up of multiple System
Exclusive messages (known as packets) which
contain the console information.
Transmit and Receive. The format for a single
packet is as follows:
F0 <SysEx header> <packet type> <packet
number> <data> <checksum> F7
<SysEx header> = 00 00 1A 50 07 VV vv nn
Where VV = software version number – unit
vv = software version number – decimal
nn = console MIDI channel number
<packet no.> = packet number from 0 to 127
<data> = block of console data (7-bit format)
<checksum> = checksum to allow error detection
MIDI Dump Errors
If the console or connected equipment fails to
respond to a MIDI dump then check:
• The MIDI cable is good and correctly plugged
• The same MIDI channel number is selected
• The rear panel switch is set to MIDI
• Try again
If a data error is detected during a dump out or in
the console display will show an error message
code:
Er1 Buffer overflow
Er2 Packet out of sequence / missing
Er3 Checksum error / corrupt data
Er4 Invalid packet length
Er5 Input timeout
Er6 Unsupported block type
Er7 Invalid scene number
Er8 Block size error
Allen & Heath ML Archiver
The ML Archiver Windows™ utility for the PC can
be downloaded from the Allen & Heath Internet site.
This can be used to archive data to and from the
PC via MIDI or RS232.
Check the Allen & Heath Web site for further details
and loading instructions.
If you are using a MIDI sequencer to record the
dump out data string then make sure you play it
back at the same speed you recorded it. If you
dump it back into the console faster than it was
recorded some data may not load correctly.
ML5000 Service Manual 23
Operating Software Technical Support
Operating Software Version Number
The version number is briefly shown on the
snapshot display on power up. Make sure the
system amplifiers are muted or turned off before
switching the console on or off. This example
displays version 1.20
Loading New Operating Software
Check the Allen & Heath Web site for the latest
version of console software. New software is
loaded from a PC via the RS232 port.
IMPORTANT ! The current console settings and
snapshots may be lost when you load new
operating software. If you wish to keep your
settings and snapshot contents, first archive them
using the dump out facility. Restore these after
loading the new software by using dump in.
Power Up and Power Down
The console settings are saved when power is
removed. On power up these settings are restored.
To Reset the Console Settings
Hold down SHIFT and RECALL while turning on the
console to reset all current settings. This does not
affect the contents of the snapshot memories. The
default settings are restored:
• Selects normal console operating mode
• Clears current P/AFL selections
• Clears all current Mute Group assignments
• Clears all current VCA Group assignments
• Clears all channel automation safes
• Restores the default SIP safes
• Enables the snapshot store function
• Turns off recall auto-increment
Download the software from the Allen & Heath Web
site to your PC computer. Connect the PC RS232
port to the console RS232 port using a standard
pin-to-pin (not null modem) 9-pin serial cable. Set
the console rear panel switch to the RS232 position.
Power up the console. The snapshot display
should read UPd (update) as the console awaits
data from the PC. Follow the instructions provided
on the Web site for loading the new software into
the console. When completed make sure you set
the console rear panel switch back to the MIDI
position.
STORE
RECALL
(SHIFT)
To Reset the Snapshot Memories
Hold down SHIFT and STORE while turning the
console on to clear all the snapshot memories. This
does not affect the current console settings. For all
snapshots:
• Clears all stored mutes
• Clears all stored VCA Group assignments
To reset all Settings and Memories
Hold down SHIFT, RECALL and STORE together
while turning the console on to clear all current
settings and the memories.
Contacting Allen & Heath
If you have any queries about the automation
system please quote the console model, serial
number and operating system version number in
any communication with Allen & Heath or your
appointed service agent. Technical support is
available through your dealer or by visiting the Allen
& Heath Internet Web site.
www.allen-heath.com
24 ML5000 Service Manual
Servicing the Input Fader assembly
Before beginning any service work, remove all power to the unit and disconnect any signal cables
where necessary. Ensure adequate lighting and use the correct tools.
Remove the numbered Ident strip by placing a flat headed screwdriver under one end and prizing it
upwards. Remove the Ident strip by ‘peeling’ it from one end of the console to the other.
Remove the 3x 6Bx3/8 Countersunk Pozi Zinc Screws from the top of the fader panel (A) and the 3x
6Bx3/8 Flange Headed Pozi Black Screws from the bottom of the fader panel, taking care to retain the
plastic washers (B) (see fig.1). Carefully tilt the fader panel assembly out from the console and
remove all connecting IDC wireforms. The fader panel assembly can now be removed from the
console.
fig.1
3) Flip the fader panel over and remove the 2x 4ABx5/16 Countersunk Pozi Black Screws (D)
from the Fader Slave PCB (see fig.2)
fig.2
ML5000 Service Manual 25
4) Carefully remove the Fader Slave PCB from the Mono Fader PCBs by pulling it upwards
from the fader boards.
5) Once removed, turn the Fader Slave PCB over (see fig.3)
To remove a Mono Fader PCB, use a 5.5mm spanner to remove the relevant M3x4 Taptite Hex
Headed Screws (E) that attach the Mono Fader PCBs to the Input Fader Bracket (see fig.3).
To remove a fader remove the two relevant M3x5 Countersunk Pozi Screws with under-head pips (C)
as shown in fig.1. Then unplug the fader wireform from the Fader Slave PCB, the fader can now be
removed. De-solder the three fader wireform wires from the fader, taking note of the wire positions for
refitting.
Note: A fader can be removed without removing the IDC wireforms and Slave PCB.
Fader Slave PCB
Fader Wireform
E
fig.3
To refit any of the PCB/Fader assemblies, follow the above procedure in reverse order. Ensure all
connectors and harnesses are correctly aligned and plugged on. Test for correct operation.
26 ML5000 Service Manual
Servicing the Master Fader assembly
Before beginning any service work, remove all power to the unit and disconnect any signal cables
where necessary. Ensure adequate lighting and use the correct tools.
Remove the numbered Ident strip by placing a flat headed screwdriver under one end and prizing it
upwards. Remove the Ident strip by ‘peeling’ it from one end of the console to the other.
Remove the 5x 6Bx3/8 Countersunk Pozi Zinc Screws from the top of the fader panel (F) and the 5x
6Bx3/8 Flange Headed Pozi Black Screws from the bottom of the fader panel, taking care to retain the
plastic washers (G) (see fig.4). Carefully tilt the fader panel assembly out from the console and
remove all connecting IDC wireforms. The fader panel assembly can now be removed from the
console.
F
H
G
fig.4
Flip the fader panel over to reveal the PCB assemblies (see fig.5).
Stereo Fader PCBs
Master Fader Centre PCB
Master Fader L/R PCBs
Control Panel PCB
Mute Group PCB
Stereo Slave PCB
VCA Master Fader PCBs
VCA Master Slave PCB
fig.5
ML5000 Service Manual 27
The Stereo Slave PCB must be removed before the following PCBs can be removed; Mono Fader,
Master Fader Centre, Master Fader L/R & Control Panel.
1) Cut the 2x Cable ties attaching the Stereo Slave PCB onto the Mono Fader & Control
Panel PCBs.
2) Carefully remove the Stereo Slave PCB by pulling it upwards.
3) Once removed, turn the Stereo Slave PCB over.
4) To remove a PCB, use a 5.5mm spanner to remove the relevant M3x4 Taptite Hex Headed
Screws that attach the PCBs to the Master Fader bracket.
5) To remove a fader, remove the two relevant M3x5 Countersunk Pozi Screws with underhead
pips (H) as shown in fig.4. Then unplug the fader wireform from the Stereo Slave PCB, the
fader can now be removed. De-solder the three fader wireform wires from the fader, taking
note of the wire positions for refitting.
6) Removal of the ‘H’ shaped Control Panel PCB can only be achieved once the vertical
section of PCB has been removed. Once the vertical section has been removed, remove the
2x M3x6mm Pan Pozi Black screws attaching the ‘H’ shaped Control Panel PCB to the fader
bracket. The ‘H’ shaped Control Panel PCB can then be removed.
10) To remove the Mute Group PCB, use a 5.5mm spanner to remove the two screws attaching
the PCB to the fader bracket.
The VCA Master Slave PCB must be removed before the Master Fader PCBs can be removed.
11) Cut the 2x Cable ties attaching the VCA Master Slave PCB onto the Master Fader PCBs.
12) Remove the 15way Flexi cable running between the VCA Master Slave PCB and the Mute
Group PCB.
13) Carefully remove the VCA Master Slave PCB by pulling it upwards.
14) Once removed, turn the VCA Master Slave PCB over.
15) To remove a PCB, use a 5.5mm spanner to remove the relevant M3x4 Taptite Hex Headed
Screws that attach the PCBs to the Master Fader Bracket.
16) To remove a fader, remove the two relevant M3x5 Countersunk Pozi Screws (H) from the
Master Fader front panel (see fig.4). Unplug the fader wireform from the Stereo Slave PCB,
the fader can now be removed. De-solder the three Fader wireform wires from the fader,
taking note of the wire positions for refitting.
Note: A fader can be removed without removing the IDC wireforms and Slave PCB.
17) To refit any of the PCB assemblies, follow the above procedure in reverse order. Make sure
all harnesses are aligned and plugged on. Test for correct operation.
28 ML5000 Service Manual
Base removal and Internal PCB assemblies
Before beginning any service work, remove all power to the unit and disconnect any signal cables
where necessary. Ensure adequate lighting and use the correct tools.
Before you can access the internal PCB assemblies, invert the console and remove the screws
securing the base in place. Carefully lift the base off.
EARTH BUSS PCBS
MONO INPUT
PCBS
SYS-LINK II
OUT PCB
MIDI POWER
PCB
STEREO PCBs
AUX, GROUP
& LRC PCBs
MASTER
DISTRIBUTION
PCB
EARTH BUSS PCBS
MONO INPUT
PCBs
MONO INPUT
CONNECTOR
PCBs
Note that the Earth Strip has been removed for clarity.
ML5000 Service Manual 29
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