Not sure, Its an odd problem. I had the same issue with an Astro Saber. I will TX with the radio to the repeater and it will be very scratchy sometimes (most of the time). When I transmit from radio to radio (XTS 3000 to XPR 6550) Scratchy. But when I transmit radio to radio (To Astro Saber) its not scratchy. I am stumped. All conventional voice and such. None of the XPR 6550 on the system have the scratchy audio issue. I am not using a shoulder mic either.What are you looking to have repaired on the radio?
Sent from my iPhone using Tapatalk