I purchased 2 XPR8400 off Ebay. These were from a large IPSC system. I bought them for mine and a friends churches. I am a former Motorola Tech, but it's been about years since I left that industry. My copy pf Mototrbo CPS was version 11. I had no idea if it would even read these repeaters. Much to my surprise it did. So I deleted the digital channel and added analog channel and didn't expect it to write but it did. Everything OK except no TX output, I can hear the TX on my HT, but it acts as though the PA is inhibited. Both repeaters act the same way. I then noticed that the code that was in the repeater was version 13. So found and bought version 16 and now have that installed on laptop, however CPS 16 won't detect the repeater and of course CPS overwrote my old version 11. I am wondering if a firmware update would bring things around. Anybody that has an idea would be greatly appreciated.
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XPR8400 Help
- Thread starter chuckw6rd
- Start date
billhalter
Newbie
Sounds like you have bad PA in both. They are just two mobiles in a box, switch them out (PA in receiver is good) don't forget to move heat sink & reprogram. 
Well familiar with what's inside. I suppose both could have PA failures, but his reviews from other purchasers would reflect that he doesn't send out junk. Searching, I have found that a corrupted code plug can cause this and one of the symptoms is that the ID doesn't work and that is the case here. As I said I have updated to CPS 16 and now CPS is not detecting the repeater. When I got these I had no idea what version CPS had last programmed them. My old version of CPS was 11 and the code plug in the repeaters was 13. I was surprised it read and wrote. In the my long past I remember us getting shipments of Trbo radios in, that we couldn't program because the firmware was newer than our CPS. That always resolved in a couple days when our new CPS arrived from Motorola. That was back in the days when the new version was sent out on a CD. I was pretty well convinced it was the PA also until the second repeater did the same thing. Which was a bit strange. Tuner showed no faults in either repeater. My biggest problem now is that I can't talk to them with CPS. Having to replace the PA's isn't ahuge deal, not being able to program them is.
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