Originally Posted by audio4life
So now you're saying that as it turns out, you've had 3 4520's? You say that the 4520 has problems with bad board to board connections, that the 4520 has about 500(I guess you counted all 500) of these connections, and this particular connection is unique to the 4520(and how you know this, I guess you've dissected all the Denon models to know that this "connector" is ONLY in ONE Denon). But it seems that your third 4520 is the only unit that suffered from these loose connections. You say that if you "drop" the unit the connection will re-establish? I guess that each time, Denon was willing to replace your unit with a brand new unit too. That's quite a story.
Friend, you are one unlucky Joe.
You misquote me and you say instead "this particular connection". There a whole universe of difference between a connection and a connector.
I guess you are dyslexic, but that is not your fault. What is your point?
The type of connectors used in the AVR4520 are unique in the modern world of branded avrs.
It uses connectors with female contact elements that DO NOT HAVE grip ability
That is most unique for a "flagship model" to use such a ..d, and perhaps cheap type of connectors. All other models of branded avr's, including other Denons use the type of connectors with female contact elements that spring back to grip the male contact elements to ensure proper and long-lasting contact.
The HDMI/processor board has over 240 contact elements going to the audio board. Simple arithmetic dictates that at least 480 contact elements just between these two boards. Add to that the 66 by 66 connectors used for the diagnostic/protection circuitries from the main board to the audio board then add more for those that go all the way to the HDMI board. There are more boards that just these.
There you go, you would easily arrive at a conservative figure of at least 500 potential failure points - simply because of the kind connectors used.
It would have been better if they used the better kind of connectors, would you not agree?