Please DO NOT send any Marantz to George Meyer AV, as I mistakenly did for my SC7S2 Preamplifier.
Morris owner will keep you waiting for month and months and bullshit you on the phone with a horrible attitude. From a technical standpoint, they don't have the knowledge to repair complex Marantz units, i.e. they do not have the necessary Kit to upgrade the software on the SC7S2. However they will lie to you and tell that first thing they do is a software upgrade. I requested my unrepaired unit to ship back from them, once received my unit was totally dead. I had to open it to reconnect all the wires they left unconnected on purpose.
My bad for trusting George Meyer without doing a proper preview research.