Allen&Heath ML4000 SERVICE MANUAL - Manual (Page 20)

20 ML4000 Service Manual
Internal Options Links
The ML4000 is designed to offer the utmost flexibility to satisfy the application without modification.
However, the following internal link options are provided to allow customisation to satisfy the more
specialist applications or personal preferences. Remember to set these internal links according to
the user requirement if replacing assemblies while carrying out service work:
Mono channel AUX options The pre-fade sends are set pre-insert, pre-EQ, post-mute
as standard. Jumper links on the mono circuit cards can be replugged to configure
post-insert, pre-EQ and/or pre-mute. Refer to drawing D1 and D3.
Stereo channel AUX options The pre-fade sends are set pre-EQ, post-mute as
standard. Jumper links on the stereo circuit cards can be replugged to configure post-
EQ and/or pre-mute. Refer to drawing D5 and D7.
Mono channel DIRECT outputs These are derived post channel fader as standard. A
jumper link on each card can be replugged to configure pre-fader or post-fade with level
trim. The direct out pre-fade source is the same as that configured to feed the aux
sends. The level trim option disables the channel Aux1 send and uses its send as the
direct out level control. Two links need to be set in this case, one to send the direct
output signal through the send control, the other to disable the Aux1 send from the
channel. Refer to drawing D1.
2-track output source These are set post master insert and fader as standard. Two
pairs of jumper links can be replugged to derive the output pre-insert, pre-fader. Refer
to drawing D18 and D20.
Internal Assembly Assignments
The following assignment links need to be set according to assembly position in the console.
These should not need changing unless a replacement assembly has been fitted.
Group 1,3,5,7 buss assignment Zero ohm links determine which busses feed the
group and aux mix amps. Refer to drawing D11 and D12.
Group 2,4,6,8 buss assignment Zero ohm links determine which busses feed the
group and aux mix amps. Refer to drawing D14 and D15.
VU meters 1-8 The same assembly type is used for meters 1-4 and 5-8. The position
in the console is determined by soldered links. Refer to drawings D38, D39 and D40.
MIDI/PSU assignment Position two pairs of links according to whether the assembly is
fitted to a console or a sidecar. Refer to drawing D42.
CPU assignment Position the three links according to the console type as shown on
drawing D44