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Post by jeremy on Jun 10, 2014 15:47:25 GMT -5
Hey hey, I finally have a few more HT Receivers to play with! I know I have the "Big" Denon that I asked about and never did finish with you MT (We will get there soon  ) but since I'm keeping that, its not a priority. I have about 12 home theater receivers I managed to pick up for less than the price of one new one, all with some sort of issue or another., (the main issue with most is they wont power up at all).
This VSX-519V however powers up, and audio via tuner and analog inputs works. The HDMI In for video/audo and Out for video/audio does nothing at all. The Receivers display blinks HDMI and that's where it sits. I have gone through the minimal menu this receiver has, and didn't have anything on HDMI (though I am using a remote for an 18 year old unit so it may not be fully compatible with the receiver.)
I've done everything I can think of before attempting to service the unit, and visually staring at the HDMI board of the receiver shows a very nice looking but (obviously) not working HDMI board. No noticeable bad components on the board.
So oh wise one, where do we start?  |
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Post by jeremy on Jun 10, 2014 15:50:31 GMT -5
Also for what its worth, I'm feeding the receiver a 1080p (and did 720p as well) signal with audio from a known working Pioneer BDP-HD1 blu-ray player to test this. Audio and video both come right up on the TV once I swap the HDMI from the TV going to the receiver-into the Blu ray player directly.
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Post by mastertech on Jun 10, 2014 18:01:42 GMT -5
Try connecting just an HDMI input to the receiver. No out connection at all. See if the HDMI light locks on solid red.
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Post by jeremy on Jun 12, 2014 12:27:29 GMT -5
MT, Sorry I haven't replied yet, I'm actually wrapping up a receiver that's been sitting around just so I have a bit more room. I'll get back on this today though as long as this receiver im finishing up stays cooperating. |
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Post by jeremy on Jun 16, 2014 9:30:28 GMT -5
MT, finally back at this receiver. I was wrapping up the VSX-09TX I started oh so long ago.... bad motherboard, speaker output board, and the amplifier!! Honestly I haven't checked the motherboard or speaker boards for what components were bad, I used another very ugly but fully working 09-TX to rob parts from. Good thing I did, because I wouldn't have found all these issues the way it was going. Oh... and I HATE those damn ribbon cable connectors Pioneer used, what a PITA to deal with!! ANYWAY - Regarding this receiver, I checked the HDMI with only an input signal going to it, still blinking HDMI, same with only an output HDMI from the receiver. Basically, it does nothing besides blink at me; almost taunting-like  Awaiting your orders |
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Post by mastertech on Jun 16, 2014 17:29:49 GMT -5
First thing would be to check supply voltages.  |
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Post by jeremy on Jun 18, 2014 12:12:57 GMT -5
MT, Checked all the 3.3v voltages, all of them read 3.3v
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Post by jeremy on Jun 18, 2014 12:14:22 GMT -5
The 5v line reads 5v as well
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Post by mastertech on Jun 21, 2014 7:46:28 GMT -5
The first question is, is the problem on the HDMI board or on the main board.
The issue is, the SM does not have a schematic for the HDMI board.
I do see though there are 2 regulators on the HDMI board. I would check those and their output to see if there is a problem there. Either 1 can cause a dead board.
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Post by jeremy on Jun 21, 2014 9:04:43 GMT -5
Ahhh not a surprise that theres no schematic for the HDMI board. I'll check the regulators and let you know what they read. I don't have a 2nd one of these with a good HDMI to swap in to see if its the HDMI board only, but I am confident it is. I've had a few other Pioneers that I sold cheap because the HDMI wouldn't function/fully function. Some people don't even want the receivers for that even.
The funny part is, these receivers were not supposed to even power on; but most of them do, they just have weird issues, only one had a blown amplifier which was a bit of a surprise given the last load of HTR's that I serviced had mainly blown amps, and these are similar models.
Anyway, I'll let you know what I find!
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Post by jeremy on Jun 25, 2014 11:47:53 GMT -5
MT, I checked those 2 regulators out, the 1.8v and the 1.2v. Visially I can see one is bad, as it is bubbled in the middle. The other isn't reading very stable, it jumps up and down a bit.
The parts are: IL1117-1.8 and IL1117-1.2 (1.8v and 1.2v) I have not been able to locate them on the internet. Do you know where I could get them?
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Post by mastertech on Jun 25, 2014 15:30:48 GMT -5
The 1 that is not stable could be caused by the bad one, depending if the input voltage is being affected as they are probably both fed from the same source. You could remove the bad one and recheck the other or just replace both. Or you may have a damaged part causing the drain. You can remove both regulators and use your DMM on diode scale and check for a low reading between the output pad and gnd. On these types of regulator you can just ignore the beginning letters and search for the main number. Here is a link to show what I mean. You can search out your specific requirements from these. www.digikey.com/product-search/en/integrated-circuits-ics/pmic-voltage-regulators-linear-ldo/2556290?k=1117 |
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Post by mastertech on Jun 25, 2014 15:36:02 GMT -5
Oh and make sure you verify the pinouts on which ever replacements you decide on.
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) but since I'm keeping that, its not a priority. I have about 12 home theater receivers I managed to pick up for less than the price of one new one, all with some sort of issue or another., (the main issue with most is they wont power up at all).
