Meyer Sound CueMixer Matrix3 - Manual (Page 29)

Service and Troubleshooting
Service 29
Calibration 29
When power is first applied to the CueMixer, it runs through a self-test. The LEDs turn on one row at a time starting
with the bottom row and working to the top. All fader motors are cycled and then moved to the 1/3rd travel position.
There are no fuses or user serviceable parts inside. If you are having trouble please contact LCS Series Technical
Support. Moving a fader or pressing a button on the CueMixer, will cause the appropriate Receive LED on the front
of the LX-300 Communication Synchronization display to light while the control is being moved. If you do not see a
response on the LX-300, check your cable.
Table 5. Troubleshooting
Solution Problem
The LX-300 connected to the CueMixer does not have
the connected port enabled for CueMixer. Use either
Frame Control, or an External Subcue to enable the
CueMixer. CueMixer fader moves the on screen fader, but jumps
back when released. CueMixer buttons do not change
functions.
The fader calibration needs adjustment. This requires a
qualified electronic service technician. Please contact
Meyer Sound for instructions. Fader makes a 'tapping' sound at the bottom of travel
when the screen fader is set to (all the way down).
Use the 'Set Button Debounce Period' external to set the
Debounce interval. GO button 'double-triggers'.
Service
There are no user serviceable parts inside a CueMixer. There are no lubricants required for the faders. Service
should be done only by qualified service technicians.
Calibration
Warning
The following information is provided for qualified service technicians only. It is possible to damage the unit and to
void the warranty if standard electronic service procedures are not followed. Determination of the warranty status
of any unit will be done exclusively by Meyer Sound Laboratories.
Disconnect the power supply and open the unit. There are two hex standoffs, one on each side of the DB-9 connector
that must be removed. Use a 3/16th Hex driver. There are six hex socket flat head screws that attach the top plate.
Use a 2mm hex key to remove these. Be careful removing the top as it is possible to short out the voltage regulator
when removing the top plate. All circuit boards attach to the top plate so you do not have to remove fader knobs.
Caution
There is a metal EMI shield around the DB-9 connector. On some units this is not glued and will come off. It is possible
on reassembly to install this upside down preventing connection to the serial connector.
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