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AUXILIARY BUS PRE/POST CONFIGURATION
The standard factory MX-5200 Auxiliary Bus configuration is:
• Aux 1/3 routes the post-EQ/post-fader signal to Auxiliary Buses 1 or 3.
• Aux 2/4 routes the pre-EQ/pre-fader signal to Auxiliary Buses 2 or 4.
Internal jumpers allow this configuration to be changed to the following:
• Post-EQ/post-fader or post-EQ/pre-fader on all Aux sends (1 through 4).
• Pre-or post-fader on all Aux Sends (1 through 4).
In addition, when the channel MUTE switch is engaged, the post-EQ/post-fader signal is muted,
but the pre-EQ/pre-fader signal is not. This allows the channel to be "cued" in the PFL solo
system, even if the channel is muted.
MONITOR BUS PRE/POST CONFIGURATION
• Pre-EQ/pre-fader or post-EQ/post-fader to Monitor 1 and Monitor 2, switch-selectable.
Internal jumpers allow this configuration to be changed to the following:
• Post-EQ/pre-fader or post-EQ/post-fader signal to Monitor 1 and Monitor 2.
CHANGING THE PRE/POST CONFIGURATION
The pre/post jumpers are actually three adjacent solder pads. They are located directly next to
the MONITOR PRE/POST switches. The circuit board does not need to be removed from the
panel, as the pads are accessible from the solder side of the PC board. A small connecting
trace between two of the pads sets the factory jumper configuration. When changing the factory
configuration, the trace must be cut to break the existing connection. To connect the desired
pads, simply create a solder bridge across them. The jumpers are labeled (PX3,4,5), and the
square pad indicates the number one (1) pad. PX3 selects pre/post EQ and is always pre-fader.
PX4 selects between pre/post fader for AUX 2/4. PX5 selects pre/post fader for AUX 1/3. Refer
to the Input Channel schematic P/N 047688 sheet 1 of 2 for pin outs.
BUS CONFIGURATION
Remove the top trim piece. The screws are located above the rear patch bay.
Remove the two (2) flathead screws at the top of the panel.
Slide the panel towards the patch bay until the lower edge of the panel exits the retaining slot.
Lift the panel straight up about 1 inch above the chassis.
Raise the bottom (Fader end) of the panel up to a near vertical position.
Gently rest the top edge of the panel onto the top of the chassis.
Use a support stick to hold up the panel similar to the hood of a automobile.
DO NOT RAISE OR LOWER THE BOTTOM OF THE PANEL WITHOUT HOLDING THE TOP
OF THE PANEL UP OFF OF THE CHASSIS. PIVOTING THE TOP OF THE PANEL AGAINST
THE CHASSIS WILL SEVERELY DAMAGE THE PC BOARD, TRIM POTS AND OTHER
COMPONENTS.
There are many ribbon cables (Cable Assemblies) used as interconnects between circuit
boards. The connection points are all labeled, i.e. P58 on the master board connects to P58A
on the master I/O board. Use caution when reconnecting the cables as it is easy to connect
them incorrectly (one pin off). On power supply interconnects, this can cause major damage to
various components.
3
PANEL REMOVAL
*****CAUTION*****
INTERCONNECTS
Use caution!
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