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Post by mastertech on Dec 13, 2014 11:22:23 GMT -5
It seems, like these measurements look OK? No, not all are ok. I do not see power at pin 9 even when you force it on and you say the display reads power on. Pin 9 is for the main transformer relay. So even though your display says "power on" it is not turning on the main transformer. Now this could be being prevented by an error but you say when you try to bring it out of protest it does nothing. So I need to look over the schematics with this current info to try to narrow down where the cause may be. I just have not had any free time the last few days except for some short responses here and there. I will look as so as I get some free time. I wil give you a quick test to do in about an hour though. Just something to verify a few things. |
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Post by tibimakai on Dec 13, 2014 15:51:46 GMT -5
No worries, this is only a hobby(or challange), your life is more important.
Power turn on signal, comes from the CPU, right?
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Post by mastertech on Dec 13, 2014 18:09:59 GMT -5
The connector you tested this on comes from the front board. I believe it is a harness that connects the 2. I need you to either disconnect or cut the wire that goes to pin 9 for the AC relay. I then need you to test for DC voltage on the front board side of the wire to see if the voltage is now there. Try it both ways like you did previously meaning also force it on.
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Post by tibimakai on Dec 14, 2014 19:54:12 GMT -5
Sorry about not getting back sooner, I totally forgot about checking the forum.
That harness, is a flat ribbon cable, so I can't cut it.
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Post by mastertech on Dec 14, 2014 21:11:43 GMT -5
You can slice between the wires with an exacto knife. When you have enough of a slice on both sides of that wire you can then cut it. Or remove it from the connector.
And no hurry either. I am still pretty busy finishing up some things.
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Post by tibimakai on Dec 15, 2014 11:47:14 GMT -5
The problem with that is, that it's a tape type ribbon cable, so there are no solid wires in it. I will have to check, if there is a component on the PCB, which I could un-solder instead.
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Post by mastertech on Dec 15, 2014 12:04:05 GMT -5
Ok, now I understand. I know which ribbon you mean. I will look also.
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Post by mastertech on Dec 15, 2014 12:06:37 GMT -5
If you go to the power supply board and remove R123 and C138. Or if you can disconnect the ACRY line there.
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Post by tibimakai on Dec 17, 2014 12:28:39 GMT -5
Sorry about not giving the results, I was busy with other stuff, yesterday I have sold my ex Onkyo TX-NR515, got a "broken" Creative Aurvana Gold headphone from Ebay, but it turned out, that it's working great.
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Post by mastertech on Dec 18, 2014 21:29:47 GMT -5
got a "broken" Creative Aurvana Gold headphone from Ebay, but it turned out, that it's working great. Well good for you!  |
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Post by tibimakai on Dec 19, 2014 22:51:17 GMT -5
At the power supply, there is a Masterpower wire, which seems like the one, you refer as ACRLY. There is only this wire the 5.6V and GND wires at that connector going to the digital board.
If this wire is removed, there is no voltage, on or off.
I have went back and rechecked the pin #9 and now there is 4.3V. Everything else is the same.
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Post by mastertech on Dec 20, 2014 10:05:09 GMT -5
Yes, I see that it is called Masterpower on the power supply board. It is the ACRLY on the digital board. Its name should of remained the same. Not smart for Pioneer.
It is good to see that the power came up at pin 9. The wire would have power also depending on where you disconnected it at. Did you disconnect it at the power supply or at the digital board? Let me also put it another way. Where you are testing the wire for the 4.3v, is that part of the wire still connected to the power supply or still connected to the digital board?
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Post by tibimakai on Dec 21, 2014 4:11:21 GMT -5
I have pulled the wire out from the connector, that plugs into the digital board coming from the power supply.
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Post by mastertech on Dec 21, 2014 11:31:17 GMT -5
Well looks like you have a problem on the power supply board. Reconnect that wire and verify that pin 9 went back down to zero.
If it goes back to zero then go to the power supply board. Unplug the receiver. Set your DMM to diode scale. Test across C138 and then test across various legs of TR102.
Post your findings.
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Post by tibimakai on Dec 21, 2014 14:13:50 GMT -5
Now I understand, what is going on. Masterpower, it would be the power on signal and this signal, doesn't reach the relay to turn it on, right?
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