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Post by u2nmg93 on Sept 25, 2017 10:13:28 GMT -5
I'll take a swing at that one, I haven't ever soldered an ic like that before. Would the no video board be easier to fix? Hoping it something much simpler so I can get at least one good unit out of the two. Where would I start looking for 5v on these?
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Post by u2nmg93 on Sept 22, 2017 17:04:54 GMT -5
Correct, I have no sound at all with digital and the analog is barely audible and very poor at max volume with my ear right next to the speaker.
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Post by u2nmg93 on Sept 21, 2017 22:42:43 GMT -5
Both come out the same, pin 41 to 16 <1ohm pin 47 to 17 66.6ohm pin 48 to 19 66.6ohm
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Post by u2nmg93 on Sept 20, 2017 22:17:00 GMT -5
Put the resistors back in and voltage was 2.5v at pins 19 and 17. That's probably the smallest thing I've ever tried to solder and they appear to be connected properly. R1153 reads less than 1 ohm.
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Post by u2nmg93 on Sept 20, 2017 20:57:13 GMT -5
At P1501B I have the same static low volume sound on pins 19 and 17. At pin 19 I have 1.4vdc and pin 17 has 1.6vdc. Then I switched to the board with sound but no video. Now I have 2.5vdc at pin 17 and 19 and the audio is perfectly clear at pin 17 and 19. Then just to double check I put both boards in the other receiver with the same results. Is something not supplying the preamp circuit with enough voltage or draining it somewhere?
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Post by u2nmg93 on Sept 20, 2017 11:17:34 GMT -5
I didn't have any audio at point J4606 or P6021. I'm not sure how to find the other points on the schematic. If you could list them I'd appreciate it.
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Post by u2nmg93 on Sept 18, 2017 15:11:31 GMT -5
Removed both and one side of the resistor pad has no audio signal, the other has the distorted static sounding audio that was the same at pins 47 and 48.
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Post by u2nmg93 on Sept 18, 2017 8:55:44 GMT -5
I have 5v at pin 46
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Post by u2nmg93 on Sept 16, 2017 22:02:06 GMT -5
That is correct, never thought so many different problems could originate from the same board.
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Post by u2nmg93 on Sept 16, 2017 21:14:42 GMT -5
Sorry, only 2 complete units at the moment, the original board that had no power, you were correct with the crystal being bad. I replaced it this morning. Now the original receiver powers up and has sound output but no video output. I don't know if it's related to the no power situation or if I messed something up soldering or testing. As it stands right now I have 2 units, one has no sound out and one has no video out and unfortunately both seem to still be in the HDMI control board.
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Post by u2nmg93 on Sept 16, 2017 15:28:38 GMT -5
Q4005 is not populated. Just to check I took the board that now has sound and no video and switched it between the receivers, both have sound clear as day but neither has video.
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Post by u2nmg93 on Sept 16, 2017 12:31:34 GMT -5
At pins 47 and 48 I have the same, low distorted sounding music that I get at the speaker terminals. It is much quieter than when I checked it right at the input. I also noticed a loud pop in the speaker once I connected it and there is 2.5vdc preset at pins 47 and 48. Not sure if that matters.
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Post by u2nmg93 on Sept 15, 2017 16:25:42 GMT -5
Works well, which points do I need to check?
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Post by u2nmg93 on Sept 15, 2017 12:56:39 GMT -5
Think I understand the concept. Take an rca cable cut off one end, connect the ground to ground on the onkyo and connect a probe to the positive side that checks the signal. Connect the other end of the rca to the other amps input and you should get sound when you have signal. Correct?
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Post by u2nmg93 on Sept 14, 2017 22:31:05 GMT -5
I've got 5vdc at pin 5 on Q1090 and 3.3vdc at pin 5 on Q1091.
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