7i84 not working

tommylight
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25 Mar 2021 11:45 #203603 by tommylight

Replied by tommylight on topic 7i84 not working

andypugh wrote:
Where is the 7i84? I can check it in the UK, or PCW could check it in the USA.

I can check it in Kosovo !

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stegrg
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25 Mar 2021 14:12 #203619 by stegrg

Replied by stegrg on topic 7i84 not working

I have a secondary fully functional system utilizing a 5i25 + 7i76 setup. I tried to connect the 7i84 to the RS-422 port on the 7i76 card and I noticed that if I pull the TXA (Green/White) and/or the TXB (Green) wire out from the 7i52 connector, CR8 illuminates. If both are connected, CR8 will no illuminate. I don't know if this means anything but I thought I'd mention it. I also can't get any response from the 5i25+7i76 setup.

I'm located near Toronto, Canada. I think PCW is closest to me. (Thanks to Andypugh and Tommylight for reaching out)

The following user(s) said Thank You: tommylight

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PCW
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25 Mar 2021 17:57 #203631 by PCW

Replied by PCW on topic 7i84 not working

Probably best to to request an RMA from Mesa
Not worth sending back so they will just replace it

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andypugh
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27 Mar 2021 21:48 #203842 by andypugh

Replied by andypugh on topic 7i84 not working

stegrg wrote:
I have a secondary fully functional system utilizing a 5i25 + 7i76 setup. I tried to connect the 7i84 to the RS-422 port on the 7i76 card and I noticed that if I pull the TXA (Green/White) and/or the TXB (Green) wire out from the 7i52 connector, CR8 illuminates.

Have you tried a different RJ45 cable? Maybe that one has a short in the connector or wire?

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PCW
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27 Mar 2021 22:11 #203848 by PCW

Replied by PCW on topic 7i84 not working

Also if you lose CR8 when you connect all interface pins, this could be a 5V power issue on the interface daughtercard (voltage collapses as soon as the 7I84 TX lines connect to termination)

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stegrg
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29 Mar 2021 14:46 #204044 by stegrg

Replied by stegrg on topic 7i84 not working

Yes, I checked continuity from the solder joints of the 7i84 RJ45 connector to the other end of the cable to make sure proper connections were made inside the jack and/or plug.

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