As for winston9332's wish, I post here again what I have already written in the Marantz SR5004/6004 owners thread.
Hi there, I'm new here and heard of this forum in a German AV community. I bought the SR5004 last Saturday and experienced the "pop of death" yesterday.
Here's what led to my "pop of death":
- SR 5004 with speakers in a 5.0 configuration (without subwoofer)
- Input 1 (BluRay): Apple TV via HDMI, audio optical (as it's said to support Dolby Digital only via optical audio); Apple TV's remote mapped to the SR5004's remote
- Input 2 (DVD): Nintendo Wii via Component video and analogue audio
- Input 4 (TV): Computer via analogue audio and no video (it's an iMac with built-in screen)
What I did:
- Activated Dolby Digital on the Apple TV
- Played an AC3 test file
- Went into the SR5004's menu to change the display name to "Apple TV"
- Exited the menu
Then, it took about 1 minute until the Apple TV's output appeared again on my projector.
- Wanted to select another song
Now, on every button press of the remote, the sound disappeared for a short time.
- Switched the Apple TV to Stand-By
While the Apple TV went out, it did a loud "Pop" and the SR5004 was dead.
I have a replacement unit at home, will try it today, but I will now only connect the audio portions of Apple TV and Wii and will connect the video parts directly to the projector just like I did with my old AV receiver which only had a Composite out.
Taking into account my experiences with microcontrollers and electronics, I think, a firmware bug led to my pop of death. I suppose the following happened inside the SR5004:
When the Apple TV is connected to the receiver via both HDMI and optical link, the sound comes in via both sources. The receiver then takes the source which is "better" - first optical, then HDMI, and then analogue.
Entering the SR5004's menu while the Apple TV is playing deactivates the input from the Apple TV and selects the internal input from the receiver which I suppose is HDMI audio. After leaving the menu, the Apple TV is again selected as a source. There I think the firmware has a bug and selects both audio inputs at the same time. Maybe this led to a "high" signal on the optical link and to an electrical peak on the HDMI portion at the same time when switching the ATV off. After conversion of the optical "high" both signals added themselves and caused a peak.
The receiver SHOULD have been catching this, but I suppose it hadn't.
At least, I experienced similar phenomena when designing electronic circuits and where two outputs went into one input.
I don't claim this, but it COULD be a cause. Generally, I suspect the culprit somewhere in the electrical characteristics of the HDMI links not correctly being taken into account on the SR's inputs side, since as I read, most PODs came with HDMI involved.
I will leave HDMI unconnected on the replacement unit and connect my console and Apple TV directly to the projector again, and just connect the audio portions to the SR (Apple TV optical, Wii and PC analogue)