Hi,
This might be a cost effective time saver for someone trying to replace thes 38 pin QFN regulators on the HDMI boards.
I searched high and low looking online for the parts marked as EX3AV. Nothing listed anywhere with any useful information. The Denon/Marantz service manuals do not list the actual Denon/Marantz part#, just "nsp" Not Supplied Part.
Eventually searched on 38 pin QFN, and found a trail to Altera, and EN6337QI. That is the correct 3 amp regulator IC. Quite expensive at Digikey over $9 each.
Have fun!
Turns out there IS an unrevealed (in Service Manuals) part #, which is 231810089509S. Turns out to actually be much cheaper than Digikey or Ebay! at $3.86 each.