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Post by mastertech on May 5, 2017 11:52:41 GMT -5
Turn on receiver with an HDMI signal so the receiver is putting out sound. Then put your finger on ic909 and see if it is getting hot.
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Post by tibimakai on May 5, 2017 22:42:55 GMT -5
I can't find IC909.
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Post by tibimakai on May 10, 2017 19:57:51 GMT -5
bump
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Post by mastertech on May 10, 2017 20:47:34 GMT -5
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Post by tibimakai on May 11, 2017 14:32:04 GMT -5
Sorry about that, I guess my Adobe had a glitch or something, because did not find anything, with that designation.
I see it now. That is, at the bottom of the board. I will have to see, if I can reach under that board.
I will let you know, later on.
Thank you.
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Post by tibimakai on May 11, 2017 20:41:53 GMT -5
It is around 94 degree F.
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Post by tibimakai on May 15, 2017 13:18:19 GMT -5
I have measured it, with an IR gun. The highest that it reached, after a good while, is 94 degree F.
I couldn't reach in, with my finger.
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Post by mastertech on May 15, 2017 13:53:10 GMT -5
I don't really have much more for you. This type of problem can be very difficult and time consuming to trouble shoot. Your HDMI inputs all seem to be operating since you have audio. So I would guess it is video related. I also am assuming you do not have on screen menus either. If you just wanted to keep looking I would spend some time verifying "all" voltages as shown on pages 88 and 89 of the service manual.
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Post by tibimakai on May 15, 2017 22:23:11 GMT -5
Yes, you are right, the video signal is not recognized by the monitor. Nothing shows up on the screen.
What I still don't understand, why the digital audio keeps interrupting?
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Post by tibimakai on May 16, 2017 10:16:44 GMT -5
The Texas Instrument DSP chip, can't be at fault? This is, not the BGA version chip.
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Post by tibimakai on May 23, 2017 21:31:54 GMT -5
What do you think, should I replace the DSP IC? It is still revision C.
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Post by tibimakai on Jun 18, 2017 15:54:58 GMT -5
I have looked into the receivers settings(I'm not familiar with Pioneer receivers, only Onkyo) and by adjusting settings, I have managed somehow, to make the digital sound to sound good, no more interruptions.
Today, I have soldered wires to the four voltage inputs of the IC909 and all four voltages are there. Though the two 1.8V, are only 1.704 respectively 1.738V.
These are the same voltages, that are supplying the shorted HDMI IC. Maybe that short, caused something in this IC as well.
Should I try a new IC909 IC? I don't have anything to loose here, right?
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Post by tibimakai on Jun 18, 2017 15:58:42 GMT -5
On a side note, off topic as well, sorry about that.
You are familiar, with Harman Kardon AVR1700 power supply?
We are trying to repair it at badcaps, but it seems like we are not getting anywhere. The main issue is, that we can't make the 5V standby to work.
I have replaced two of the ICs(were blown, when I have got it and a resistor), one of them twice already.
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Post by mastertech on Jun 18, 2017 21:57:02 GMT -5
On a side note, off topic as well, sorry about that. You are familiar, with Harman Kardon AVR1700 power supply? We are trying to repair it at badcaps, but it seems like we are not getting anywhere. The main issue is, that we can't make the 5V standby to work. I have replaced two of the ICs(were blown, when I have got it and a resistor), one of them twice already. I do not mind giving it a shot but we would have to start from scratch. I have my own way of testing and I have no interest in reading what you have already done or others suggestions. And if I ask for a test I would expect you to test again and not say you already tested it. So it's up to you. Let me know. |
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Post by tibimakai on Jun 18, 2017 23:31:09 GMT -5
That sounds good, I don't have an issue to start fresh.
I will start a new thread one of these days.
What do you think, about the IC909? How would I know, if it is bad?
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