Manual
Table Of Contents
- Important Safety Instructions
 - Contents
 - Introduction
 - Software User's Guide
 - Changing Modes
 - Installation
 - VESA / Omnimount Mounting
 - Hookup Diagrams
 - Front Panel
 - Rear Panel
 - Appendix A: Key Commands
 - Appendix B: Fader Alignment
 - Appendix C: Software Support
 - Appendix D: Service Information
 - Appendix E: Technical Information
 - Mackie Limited Warranty
 
11
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. 










