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5-5Matrix 3200/6400 Series • Upgrades and Troubleshooting
Swapping BME #0 RS-232 / RS-422 Ports
Swapping BME #0 RS-232/RS-422 ports (not required on BME #1 - BME #5)
involves moving a ribbon cable from one Main Control card connector to another.
Ribbon Cable Connectors
The ribbon cables used in the Matrix 6400 Audio Switcher use a self-latching style
receptacle. Figure 5-4.A shows how it operates.
1. Press each of the two tabs outward, this unlocks
the receptacle and ejects the ribbon cable
connector part way. Pull evenly on the ribbon
cable connector to remove it.
2. When reconnecting the cable, first align the pins
in the receptacle with the holes in the connector
and press evenly into the receptacle until the
receptacle tabs lock the connector in place.
Swapping Serial Ports (RS-232/RS-422)
Before working inside, unplug the power cord.
The Matrix 6400 Audio Switcher is normally connected for RS-232 use. If your
application requires RS-422, follow this procedure (and Figure 5-4.B) to change the
configuration. The procedure for removing and installing the ribbon cables is
described above in “Ribbon Cable Connectors” above.
1. Power OFF BME #0, unplug the power cord.
2. Remove the Access Panel on BME #0 (Page 5-3), locate the Main Control card
(see Figure 5-3.A).
3. Locate ribbon cable receptacles J4 and J5 (Figure 5-4.B). One is empty and the
other has a ribbon cable which goes to the rear panel. The ribbon cable plugs
into J4 for RS-232 and J5 for RS-422. If the connection is wrong for your
application, disconnect the cable and move it to the other receptacle.
4. Reinstall the Access Panel.
5. Plug in the AC power cord, power ON the BME.
Figure 5-4.B Main Control Card (for card location, see Figure 5-3.A)
RED -
J16
MAIN +
J13
RED +
J14
U9
RS-422
RS-232
To RS-232/RS-422
Connector
MAIN -
J15
To Diagnostics LEDs
J1
J4
J5
J8