Mackie MCU Pro Owner's Manual - To Align The Faders:

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Owner’s Manual

Owner’

s Manual

Appendix B: Fader Alignment

A comprehensive fader alignment on the MCU 

Pro and MCU XT Pro is performed at the factory 

during quality control testing. Then, each time the 

unit is powered on, the faders complete a quick 

up-down test to verify that they are still aligned 

and working correctly. This should provide years 

of perfectly calibrated faders.

However, on occasion, the faders may need to 

be realigned. For example, after a firmware  

upgrade, after enduring extreme changes in  

temperature or humidity, or after a jarring impact 

or other fader failure. It’s easy to do; just follow 

the instructions listed below. Note that this  

process is identical for both the MCU Pro and  

MCU XT Pro.

To Align the Faders:

1.  Power off the unit.

2.  Simultaneously press and hold the Channel  

1 V-Pot and Channel 2 V-Pot buttons and power on 

the MCU Pro or MCU XT Pro.

3.  The faders move up, then down, for  

calibration. The LCD then displays “Entering fader 

alignment mode...” 

4.  The LCD displays instructions to align all 

faders at –40 dB. Do so by moving all faders  

until the fader’s black center lines up exactly with 

the –40 dB bold line on the silkscreen. Press the 

Channel 1 REC button when finished.

5.  The LCD will now prompt you to move all 

faders to the –10 dB mark. When completed, press 

the Channel 1 REC button.

6.  Repeat the process again, moving the faders 

to the unity (U) mark this time and pressing the 

Channel 1 REC button one last time. The LCD will 

indicate that the fader alignment was successful.

The new fader alignment data is written to 

memory and will be retained, even after the unit 

has been powered off.