Pioneer VSX-1122K dead

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jun 24, 2017 23:33:51 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 24, 2017 23:33:51 GMT -5 Good point, I didn't even catch that other 1.2V_NW supply.

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jun 26, 2017 22:07:36 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 26, 2017 22:07:36 GMT -5 Short is toward the IC9204. After I have removed all three L components, the side with the 1.2V regulator is not shorted. Only the IC9204 side, is shorted.

mastertech Global Moderator Posts: 3,538	Pioneer VSX-1122K dead Jun 27, 2017 8:41:50 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Jun 27, 2017 8:41:50 GMT -5 So what do you think you are going to do?
	MT

tibimakai
Master Tech

Posts: 689

Pioneer VSX-1122K dead Jun 27, 2017 10:25:38 GMT -5

Quote

Post by tibimakai on Jun 27, 2017 10:25:38 GMT -5

The problems are, it is not available ( I'm trying to get quotes from China, but everywhere is no longer available) and I have never replaced a BGA IC.
It would be enough, to just replace it, doesn't require any software?

mastertech
Global Moderator

Posts: 3,538

Pioneer VSX-1122K dead Jun 27, 2017 11:03:49 GMT -5

Quote

Post by mastertech on Jun 27, 2017 11:03:49 GMT -5

Well I am not so sure it is the ic anyways. There are still a lot of caps on that line that connects to the ic. Until all those caps are removed you cannot say the ic is bad. I have seen to many of these type caps go short.

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jun 27, 2017 14:06:37 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 27, 2017 14:06:37 GMT -5 I guess, you are right. I will have to remove them, one by one.

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jun 29, 2017 20:49:14 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 29, 2017 20:49:14 GMT -5 I will take a little break from this, I need to work on an Onkyo TX-NR636. Shorted L channel.
	Last Edit: Jul 1, 2017 21:39:56 GMT -5 by tibimakai

tibimakai
Master Tech

Posts: 689

Pioneer VSX-1122K dead Jul 3, 2017 23:52:15 GMT -5

Quote

Post by tibimakai on Jul 3, 2017 23:52:15 GMT -5

OK, the Onkyo is done. Working well.
About this Pioneer, I have cheated. Picked one up for $40 with other issue, most likely shorted amp, iPod LED is blinking.
Transferred the HDMI board and it is working great.
I will repair the amp and then, I'm back to the same HDMI board.

tibimakai
Master Tech

Posts: 689

Pioneer VSX-1122K dead Jul 7, 2017 10:17:22 GMT -5

Quote

Post by tibimakai on Jul 7, 2017 10:17:22 GMT -5

I have checked some of those capacitors, and it seems like the short still there, even with the capacitors removed.
This second Pioneer had the FL channel shorted, two finals were shorted ( C to E). 0.47Ohm resistors and a 100 Ohm base resistor.
Ordered the parts from Digi.
It seems like, I will have to remove the BGA and see, if the short is gone, or not. The short could be after(output) the BGA as well?

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jul 14, 2017 0:53:48 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jul 14, 2017 0:53:48 GMT -5 I have removed the BGA and the short is gone. The only place I can find this DM860A, is Alibaba. I have one on a Harman Kardon AVR1700 corroded board. I have never re-balled a BGA before.

tibimakai Master Tech Posts: 689	Pioneer VSX-1122K dead Jul 29, 2017 22:47:06 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jul 29, 2017 22:47:06 GMT -5 The BGA has arrived and soldered it in. The short is back, I guess I have replaced it and most likely it wasn't the culprit. Which way could be the short? After the BGA, or at one of the 1.2V input?

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