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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Jan 23, 2013 6:59 pm Post subject: And You Guys Think This Stuff is Easy........ |
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All parts are from 1 device. I may have even left out 1 or 2. All parts were confirmed bad and nothing was changed as a guess. Don't ask me how many hours I have in the repair as I couldn't even guess.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Wed Jan 23, 2013 7:09 pm Post subject: |
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Easy? Hell, I think the stuff you do is voodoo... Electronics might as well be black magic as far as I'm concerned.
Why would so many parts fail? Was it a lightning strike, surge, or ESD victim or something?
SC
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Jan 23, 2013 7:59 pm Post subject: |
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This was an AVR and most of the damage was on the preamp side of the audio and also the S-video board. Power to these chips comes after multiple regulators so I'm not thinking a lightning or surge on the AVR itself. However I would speculate a source device that was connect to the AVR and possibly a charge coming in from that device, especially since there was damage on both audio and video.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Wed Jan 23, 2013 8:43 pm Post subject: |
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| macgyver655 wrote: | | However I would speculate a source device that was connect to the AVR and possibly a charge coming in from that device, especially since there was damage on both audio and video. |
Interesting. A cable box, maybe... Those seem to make the system more susceptible to power issues because of the separate ground. Worse, is all the super-sensitive HDMI stuff now, I suppose.
It's a been a few years ago, but I posted here about a nearby lightning strike in my neighborhood. A bolt actually hit a house ~75-100 yards away from our place. What blew my mind was that it tripped the AFCI for the master bedroom. I don't remember if you were in on that discussion, but I surmised that, in the immediate vicinity of that lighting strike, that ground actually went high temporarily and back-fed a little current into the house wiring, tripping the AFCI, but not damaging anything. I wonder if it could have been something like that - nearby incident.
SC
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Jan 23, 2013 10:49 pm Post subject: |
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Damn, and here I thought they came out of an RPTV- standard def. 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Jan 23, 2013 10:51 pm Post subject: |
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| ecrabb wrote: | | macgyver655 wrote: | | However I would speculate a source device that was connect to the AVR and possibly a charge coming in from that device, especially since there was damage on both audio and video. |
Interesting. A cable box, maybe... Those seem to make the system more susceptible to power issues because of the separate ground. Worse, is all the super-sensitive HDMI stuff now, I suppose.
It's a been a few years ago, but I posted here about a nearby lightning strike in my neighborhood. A bolt actually hit a house ~75-100 yards away from our place. What blew my mind was that it tripped the AFCI for the master bedroom. I don't remember if you were in on that discussion, but I surmised that, in the immediate vicinity of that lighting strike, that ground actually went high temporarily and back-fed a little current into the house wiring, tripping the AFCI, but not damaging anything. I wonder if it could have been something like that - nearby incident.
SC |
I remember you posting about that and I surely agree that a strike can come up through the ground cable. I also remember having an argument with some newbie about protection devices, even at the service panel being a waste of money as your only trying to protect the incoming hot lines. The neutral and ground lines are still unprotected. And a nice hit would just jump right by any protection devices. Minor surges on the hot lines maybe, otherwise, not a chance.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Wed Jan 23, 2013 11:33 pm Post subject: |
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Looking at that pile-o-parts and can't help but think there was AC where DC is supposed to be.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jan 24, 2013 1:00 am Post subject: |
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| stefuel wrote: | | Looking at that pile-o-parts and can't help but think there was AC where DC is supposed to be. |
Funny how there's not a cap in that pile, LOL.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Fri Jan 25, 2013 11:48 pm Post subject: |
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| macgyver655 wrote: | | stefuel wrote: | | Looking at that pile-o-parts and can't help but think there was AC where DC is supposed to be. |
Funny how there's not a cap in that pile, LOL. |
cap, CAP. Whats a cap? Oh, I know "gonna bust a cap in yo-a$$" that kind of cap? 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jan 27, 2013 2:26 am Post subject: |
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Even the coin failed too eh??
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Jan 27, 2013 2:36 am Post subject: |
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No, someone dropped the coin into the unit, and that's what started the whole thing! 
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jan 27, 2013 2:11 pm Post subject: |
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Hahaha!!
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Jan 27, 2013 3:39 pm Post subject: |
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Those part just aren't worth a dime.......
You know, even with that dime there to try to reference the size they still look much bigger in that picture then they really are. I may try a wider shot later.
Unfortunately, while testing out the rest of the receiver I found another output that's not working. So I'm not done yet and that pile will apparently be growing........
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Tinman
Joined: 09 Mar 2006
Posts: 1326
Location: Carson City Nevada
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| Posted: Sun Jan 27, 2013 8:54 pm Post subject: |
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Aaand THAT'S why I have really good soldering equipment.
That looked like fun, for ONE device. Although I have had stuff like that. Pushes your tech skills... makes them better.
Marc
_________________
This space for rent.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Jan 27, 2013 10:25 pm Post subject: |
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| Tinman wrote: | Aaand THAT'S why I have really good soldering equipment.
That looked like fun, for ONE device. Although I have had stuff like that. Pushes your tech skills... makes them better.
Marc |
Oh I enjoyed every part of it. Of course any more it is becoming more of a challenge just trying to locate and order parts. That is sometimes more difficult then diagnose and repair...... I'm ordering more and more directly from China every week.....
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Mon Jan 28, 2013 5:05 am Post subject: |
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So what do you charge for a job like that !!
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Jan 29, 2013 1:17 am Post subject: |
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| km987654 wrote: | | So what do you charge for a job like that !! |
I actually do not do any customer work except for friends (note how I left out relatives, lol) and some on here. Mostly, I acquire stuff that is not working and then repair and sell........
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Phoenixed
Joined: 13 Oct 2011
Posts: 514
Location: The mitten
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| Posted: Tue Jan 29, 2013 1:52 am Post subject: |
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And he provides excellent service. 
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Planar PD-8150/Runco LS-5
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Tue Jan 29, 2013 2:41 am Post subject: |
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I'm so jealous of the skills and knowledge necessary to troubleshoot and repair like this. So cool.
SC
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue May 14, 2013 4:27 pm Post subject: |
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| macgyver655 wrote: |
Unfortunately, while testing out the rest of the receiver I found another output that's not working. So I'm not done yet and that pile will apparently be growing........ |
Figured I'd update this thread since the receiver has been working fine for some time now. I have actually decided to keep this one and have put it in one of my systems.
The last problem was the HDMI was not working. I trouble shot it to the HDMI transmitter ic. Had to order it directly from China since I couldn't find any in the US. It was actually pretty cheap through China so I orderd a couple in case I need any in a future project. It's a common transmitter chip. Around a hundred tiny pins was a real blast replacing.
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