<font color='#000000'>I discovered a fault in my new AVR-4802R receiver. The AVR will enter Pure Direct Mode (PDM) only if the rear center surround is set to a selection other than ‘none’.
If you have a 4802R and notice the Pure Direct LED does not illuminate when you select PDM try setting your rear center speaker to small (Both A and B speakers set to small). You'll see the LED light up.
If you’re asking “when you select PDM, why does the microprocessor even care about surround speakers” your dead on target: it should not care in the slightest.
According to Ben at Denon service in Los Angles, enabling the rear center speaker will not damage the AVR even if you have no rear center speaker plugged into the AVR.
I’m working with (trying to) Denon service to solve this issue. This will be my first test of a few items:
1) If Denon will field a microprocessor firmware upgrade to correct the fault.
2) The follow through of the Denon service center in LA.
3) If the RS-232 port allows for upgrades to the AVR firmware.
So far I’m not terribly impressed with the communication of the Denon service center in LA. I’ve contacted them twice and my Dealer was involved for over a week, I’m having to repeatable ask for the status of this issue. I think they are trying to see if I’ll forget about the problem.
I’ll keep you updated…</font>