Re: HT-R590 No Sound
Thanks - I will poke around some more.
I reread through this, and have been spending some time on YouTube. It seems like this unit has some Debug reporting capabilities, but the Service Manual doesn't describe any of the procedure or the field decodes. I do see that the service manual for HT-R591 has a lot more info, but I am unsure if this would apply to HT-R590. Does anyone have more information on how to use the debug modes? One point; the DSP shows all ???, so that's something.
schenckb
New Member
Last Activity: 02-16-2021, 09:13 AM
Joined: 01-03-2021
Location: Minnesota
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Re: HT-R590 No Sound
Hi madan1,
There is no data signal (input or output) on Q401 (or any of the other 3 dual op-amp chips). I tried hooking up my PC through HDMI to play a 1KHz test signal, but quickly realized that must get resampled to a much higher digital frequency (and combined with video data - something around 75MHz). So I found a 1/8" audio jack-to-RCA Y connector, and played the test signal through the composite inputs. I was able to verify that the RTAD/LTAD are still passing the "raw" signal into the Q301 chip, but again, nothing out of the...Leave a comment:
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Re: HT-R590 No Sound
Much appreciation for the continued help!
I was able to probe those points. The LTAD and RTAD signals (pins 47 and 48 on Q301) both have probe points on the HDMI card, and I can see a signal that correlates to my FM tuner (I can switch to different inputs and see the signal go flat or change depending on what I have attached). I don't have a signal generator (only a scope), but I have enough information to know that those are working. The AC voltage is ~0.5VAC peak-to-peak, with a 3.3V DC offset, which seems reasonable for an unamplified signal...Last edited by schenckb; 01-04-2021, 09:18 PM.Leave a comment:
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Re: HT-R590 No Sound
I meant to add one more thing. I did check the 15V regulators again today, and both were pretty close (-15.18V, +14.89V). It's incredibly hard to get a probe to those pins with the unit assembled, and I can't really disassemble since most of the riser cards won't work if not plugged in AND attached to the chassis for the system ground. I can't think of any way to probe the underside of the amp board while powered, because it relies on this back plane ground.
I'd really like to get closer to this R2A chip (Q4001) and measure the +/-7V zeners and...Last edited by schenckb; 01-04-2021, 01:47 PM.Leave a comment:
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Re: HT-R590 No Sound
I don't recall ever seeing the speaker icons on this display (the manual doesn't show that as an option either). I actually looked for that when reading about similar issues with the TX units, but I think it's one less feature on these HT units.
I checked the SW (subwoofer) PRE-OUT. I've got 0VAC regardless of which "music" mode output I'm in ("Direct" mode makes a relay toggle, I'm guessing that's as raw as it gets?). The sub is enabled in the menus. I plugged the sub in to make sure I wasn't getting any signal, and I also...Leave a comment:
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Re: HT-R590 No Sound
Adding some pictures, although I didn't take them when I had everything disassembled. The red circles/arrows point to the burn marks (the resistors, diodes, and caps in the area all measure fine when I had them de-soldered from the board)....Leave a comment:
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HT-R590 No Sound
Another Onkyo no-sound complaint, only a little late for warranty help
My HT-R590 stopped outputting sound of any kind. Everything else seems to work (display on, HDMI video inputs/outputs to TV, AM/FM tune into correct stations). The TI chip on the HDMI board is wirebound, not BGA flip-chip. It is D808K013BPTP3, which appears to be in the list of TI chips from this link: [url]https://cdn.badcaps-static.com/pdfs/4de3868163c013aaab6e4f12b2bc512f.pdf[/url]
Is this suspect (it's a rev.B chip, which seems to be part of the global issue)?
Otherwise, any suggestions...Last edited by schenckb; 01-03-2021, 12:52 PM. -
Re: Onkyo TX-NR807 no sound problem
I will start my own thread on this, but I thought I'd offer some perspective:
I just had an HT-R590 receiver go bad. I get no sound from the speakers, but all video, FM tuner, etc functions seem to work. When I opened the unit, I noticed signs of heat (small burn mark) on the AMP board near the resistors for the +/-15V regulators, which is almost directly above the R2A15218FP (8 channel input selector) chip, which is undermounted to that board. I have been scratching my head trying to figure out the loss of audio output, considering...Leave a comment:
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Re: New Members - please post your introductions here
Hello all!
I am an electrical engineer in the US and can usually be found building semiconductor ASICs. I do like dabbling in the "macroscopic" world, and have recently encountered some issues with my audio equipment that I'd like to make use of this platform to help solve.
Thanks!Leave a comment:
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