Start at the Tech Manual (597-4014) Section 3.2—Page 13 of the TM or Page 31 of the pdf. If that doesn’t help, then use the below to further troubleshoot.
- The Ethernet to the outside world starts at Transmitter Control Panel. The STXe500 Exciter “ETHERNET” connection goes to the Transmitter Control Panel in an STX10 and to the Ethernet Switch (Part # 959-6105) if an STX20. Cable Part # 846-4010 is used in both models. On the STX20 there will be another cable that runs from Ethernet Switch to the Transmitter Control Panel.
2. The STX20 has a “Slave” unit. The “Slave” unit will use a cable that goes from the “Slave” STXe500 Exciter “ETHERNET” connection and goes to the Ethernet Switch in the “Master” unit. Cable Part # 849-4010
3. The STX20 “Slave” unit will also have a cable going from the “Slave” STXe500 COM OUT to the STX “Slave” PA Block COM IN. Cable part # is 846-4005
4. STX10 will have a COM IN port (Port J13 on the PA Motherboard/Controller Part# 919-4241-001) that will connect to the COM OUT on the STXe500 Exciter. Cable Part # is 846-4005
5. On the PA Motherboard/Controller there are 2 connections for the communication to the Power Amps and the Power Supplies. J14 (PS COMMS) and J20 (PA COMMS)
6. There is a cable (Part # 846-4010) that runs from J14 on the PA Motherboard/Controller to the top Mezzanine Board (Part # 919-4266) for Power Supplies 1 through 4. Then from the top Mezzanine Board bottom connector there is a cable (Part # 846-4005) that will jumper to the bottom Mezzanine Board top connection for Power Supplies 5 through 8. On the bottom Mezzanine Board bottom connection, you will have a 120-ohm termination (Part # 949-6314).
7. There is a cable (Part # 846-4005) that runs from J20 on the PA Controller Board to J2 on the PA Motherboard (Part # 919-4240). This is the PA comms connection between the 2 boards.
8. On the Power Supply Communication if any of these cables are not connected or bad, the 120 Ohms Termination not hooked up or if its opened, if the Mezzanine Board is not seated good, and any other jack connections on the board are not good then you will lose communication to the Power Supplies.
9. On the PA Module Communication if any of these cables are not connected or bad and any jack connections on the board are not good then you will lose communication to the PA Modules.
10, To verify the Mezzanine Board is talking use the Front Panel and arrow down to "Diagnostics"---Diagnostics/Version Info---PSMOB01 and PSM0B02. If you see a software value on PSMOB01(top Mezzanine Board) or PSMOBO2(bottom Mezzanine board) then the Comms is working. If you don’t see anything but “0’s” then it is not talking.
11. If the Mezzanine Board is not talking then you might have to replace the board. See below. After you install the board, you will have to update the software again on the front panel. Whenever you change out any boards in the STX you will need to update software every time. That is always done on the front panel. The easiest way to work on the Mezzanine Board is to remove the whole tray. We have a procedure on how to do this. Just ask the BE Service Department and they can send you a copy.
12. For the PS Comms another thing to look at is the soldering of the pins on the Mezzanine Board. You might need to check resistance between the bottom of the board and the black connector. You can add solder to these connectors if you need too. Especially on the 2 ends of the connector where it is the weakest. Also make sure the pins are lined up when the Mezzanine Board is pressed onto the PS Motherboard (Part # 919-4265). 