nashou
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Post by nashou on Feb 9, 2014 19:49:01 GMT -5
Well when we first look at your link we see that there is no stock. So there is the first problem, lol. Then we see it is a 5v output and we need a 3.3v output. But maybe they have a 3.3v one. But then we see the pinout is completely different and will not mount correctly. Lastly we require an active high with auto discharge. Not seeing this even in this device. So my cross appears to be a twin sister to the original. And it is in stock at a really good price. I would order a bunch if I were you. www.mouser.com/ProductDetail/ON-Semiconductor/NCP4586DSQ33T1G/?qs=%2fha2pyFaduiq4pawerqXaTTn3mv94aqB4bvq7H4D%2fE8%3dYep I missed the pin out miss match! But they do have a 3.3 vot. I'll order 10 at least. And maybe some of the 5 VOT as well since there is one i see, the parts list also shows there are 1.2 and 1.8 VOT's should I get some of those as well just in case? Nashou |
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Post by mastertech on Feb 10, 2014 11:39:55 GMT -5
Ordering those other regulators is kinda up to you.
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nashou
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Post by nashou on Feb 10, 2014 18:06:48 GMT -5
Just ordered the ones I need.
On to the Onkyo while I wait.
new thread will begin!!!
nashou
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nashou
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Post by nashou on Feb 13, 2014 13:47:30 GMT -5
The voltage regulator came today. I'll install it later. Hopefully this will will at least get the main transformer to start up.
Nashou
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nashou
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Post by nashou on Feb 13, 2014 19:41:56 GMT -5
Ok No go on the new Voltage regulator. Also I did a boo boo, I had the Unit plugged in( thought i unplugged it) after I installed the part and it was still a no go. I thought there
was something between pins 1 and 2 so I used a small pin to remove it and touched the two pins and saw a spark. So I went to remove that part again. While removing it I thought id test the 47 uf cap C801 and
I was getting continuity?!?! This is with IC97 removed so I said crap it might be the cap. So I removed the cap, I hate this high temp solder they use!! took forever to get it off!! So I tested it out and it was fine!!!
a little higher ESR that Id like about 4 ohms not sure if that is ok or not. But any how it did not show continuity when out. So I checked the 405 sized cap C 853 and that shows continuity!!! So These damn schematics suck
and I can't tell whats going on. I also can't find the value of C853.
C856 on board measures 1100 or so uf but so do many other caps of that type so I spume they are a cumulative value being read.
What do you think Mac?
Nashou
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Post by mastertech on Feb 13, 2014 19:54:34 GMT -5
This is why I said some post back that you needed to do a diode test on the pads after IC97 was removed. So, as it stands right now you have ic97 and C801 removed, correct? Now do a diode test between pads 3 and 2 of ic97 location. Tell me what you read.
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nashou
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Post by nashou on Feb 13, 2014 19:59:39 GMT -5
This is why I said some post back that you needed to do a diode test on the pads after IC97 was removed. So, as it stands right now you have ic97 and C801 removed, correct? Now do a diode test between pads 3 and 2 of ic97 location. Tell me what you read. Sorry mac  . I got .000 both ways. Nashou |
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Post by mastertech on Feb 13, 2014 20:14:52 GMT -5
No worries, lol.  Looks like we have a problem. Remove C853 and test again. I will look over the schematics. |
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nashou
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Post by nashou on Feb 13, 2014 20:17:02 GMT -5
No worries, lol. Looks like we have a problem. Remove C853 and test again. I will look over the schematics. Will do, be right back. |
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nashou
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Post by nashou on Feb 13, 2014 20:26:55 GMT -5
Same result  Athanasios |
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Post by mastertech on Feb 13, 2014 21:04:07 GMT -5
Ok, 2 things.
1) Switch your meter to ohms and give me a reading.
2) Disconnect every connector from that board, even if you have to remove it and test again. We need to be sure the problem is on that board.
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nashou
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Post by nashou on Feb 13, 2014 21:04:13 GMT -5
I went and tested all the caps on for IC81 from the VSS(GND) to VCC(3.3M) all showed continuity.
I think the main chip is fried . And no replacement part. So unless I find another receiver I think this one is dead.
Nashou
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nashou
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Post by nashou on Feb 13, 2014 21:08:36 GMT -5
Ok, 2 things. 1) Switch your meter to ohms and give me a reading. 2) Disconnect every connector from that board, even if you have to remove it and test again. We need to be sure the problem is on that board. 2.4 ohms. Nashou |
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Post by mastertech on Feb 13, 2014 21:10:47 GMT -5
Ok, 2 things. 1) Switch your meter to ohms and give me a reading. 2) Disconnect every connector from that board, even if you have to remove it and test again. We need to be sure the problem is on that board. 2.4 ohms. Nashou This is also with everything disconnected? |
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nashou
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Post by nashou on Feb 13, 2014 21:13:40 GMT -5
This is also with everything disconnected? Yes the board has not been put back in since i removed all parts. Nashou |
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. I got .000 both ways.
Looks like we have a problem. Remove C853 and test again. I will look over the schematics.
