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I've performed the update this afternoon. Is required a special interface to update the HDRadio.
The files I received were a little bit confusing, I've reorganized them and made a new ZIP without the Service Manual (37Mb).
Updating Main CPU, HDMI and DSP is a piece of cake! You only have to follow the instructions precisely, must use Windows Vista or XP, use a serial port - on my experience updating receiver always use a RS232 port and not an USB to RS232 adapter.
Edit: And of course USE A NOBREAK!
Let's do this way:
1. Service Manual:
2. Update Files:
This is all you need, is all files in their correct folders, not a puzzle as I received :)
Mission Impossible acomplished! So Thumbs up!
Marantz is not different... This is a lucky email for the right service center... as we don't have service in Brazil, I think the technician decided to help...
In fact I had a Harman Kardon and the instructions were clear, do not use any adapters from USB to RS232.
I can't tell if it is going to work... but since the update software begins with connection I would test if there is a connection without starting update process.