Replacing a Quasar motorized fader

Updated by Bryan Jones


Should a Quasar motorized fader become damaged, defective, or otherwise require maintenance, this document details the removal process. This document only applies to the XR module of Quasar modules and covers replacing a single fader, not the entire fader module.

  • 2001-00569-000: Quasar XR-4FAD Module, Motorized
2001-00569-000: Quasar XR-4FAD Module, Motorized


The process of removing and replacing a fader on a Quasar module requires the following tools;

  • 2mm Allen wrench
  • 2.5mm Allen wrench
  • #1 Phillips screwdriver
  • (suggested) Anti-static wrist strap.


This process requires the removal of the back cover from the module assembly. The back cover serves as the heat-sync for the module's CPU. Do not run the module with the cover removed.

Removing the module from the frame

  1. Using a 2.5mm Allen wrench, remove the two screws at the top of the XR four-fader module.
  2. Carefully lift the top of the module up and away from the frame. The bottom of the module rides in a track. The module will "hinge" from the bottom.
There are short cables connected to the underside of each module. Two ethernet and (potentially) two power cables. There is no need to mark the wires as they can not be connected to the wrong locations.
  1. Disconnect the two ethernet cables and any power cables.
  2. Lift the module out of the frame and take it to a suitable anti-static work surface.

Module Disassembly

  1. Using a 2mm Allen wrench, remove the four screws on either side (eight total) of the module.
  2. On the underside of the module, remove the case screw next to the Ethernet ports.
WARNING: Do not remove the two screws on the back of the module above the connectors.

These are for the internal heat sync and must remain attached to the rear cover.
  1. There is a ground wire from each fader to a post near the top of the assembly. Using a #1 Philips, remove this screw.
  1. Carefully unplug the nine-pin connector shown here.
  2. Turn the module over to the front and remove the fader knob.
  3. Using a 2mm Allen wrench remove the screw at the top and bottom of the fader.
  4. Remove the fader from the backside of the module.


Reassemble the module in reverse order.


All fader module assemblies are calibrated at the factory. Should you find that this newly re-installed fader is out of calibration with the other faders in this SAME module, follow this fader calibration procedure.

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