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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 5:01 am Post subject: Nec 10pg issues |
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I recently got a nec 10pg and while i was setting it up the convergence grids went black  (i thought it was odd) so I exited out to see if I still had video from the rgb nothing just the white lettering from the menu and info dialog
Its like it comes and goes I have checked"most" of the boards and haven't seen any bad caps(unless I am missing something)
I wish I could get pictures to upload so i could show how it is doing exact
So nec owners I need HELP
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crt king of black
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Jun 13, 2013 5:15 am Post subject: |
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Seen bad caps??? Who said youd see them?
Are they original ones?
If so, they are rooted and you need to change them now.
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Thu Jun 13, 2013 1:06 pm Post subject: |
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I recently changed out 350 capacitors on my 10PG. I can honestly say that most of the bad caps I found could not be visibly diagnosed as such. More than half of the caps in the projector were bad or on their way out. The degradation of the caps will occur regardless of the number if hours on the machine. My unit had only 800 hours of run time and would not sync any input signals before the rebuild.
John
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 13, 2013 1:28 pm Post subject: Re: Nec 10pg issues |
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| the big E wrote: | I recently got a nec 10pg and while i was setting it up the convergence grids went black (i thought it was odd) so I exited out to see if I still had video from the rgb nothing just the white lettering from the menu and info dialog
Its like it comes and goes I have checked"most" of the boards and haven't seen any bad caps(unless I am missing something)
I wish I could get pictures to upload so i could show how it is doing exact
So nec owners I need HELP |
Boy, you have really been struggling trying to get a working projector that you can enjoy. You should of got an Ampro.
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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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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:20 pm Post subject: Re: Nec 10pg issues |
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| macgyver655 wrote: | | the big E wrote: | I recently got a nec 10pg and while i was setting it up the convergence grids went black (i thought it was odd) so I exited out to see if I still had video from the rgb nothing just the white lettering from the menu and info dialog
Its like it comes and goes I have checked"most" of the boards and haven't seen any bad caps(unless I am missing something)
I wish I could get pictures to upload so i could show how it is doing exact
So nec owners I need HELP |
Boy, you have really been struggling trying to get a working projector that you can enjoy. You should of got an Ampro. |
Funny but the odd thing is the set worked ok for two days before it did this(I also have an electrohome ecp4101 which I am using now till I get the nec fixed as I only got to see the set at its fullest one time and I am hooked)
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crt king of black
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:21 pm Post subject: |
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| Zolzar wrote: | I recently changed out 350 capacitors on my 10PG. I can honestly say that most of the bad caps I found could not be visibly diagnosed as such. More than half of the caps in the projector were bad or on their way out. The degradation of the caps will occur regardless of the number if hours on the machine. My unit had only 800 hours of run time and would not sync any input signals before the rebuild.
John |
That is a lot of caps
Do you know where the video input board is located(it don't work on the video and svideo inputs)
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crt king of black
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:25 pm Post subject: |
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I wi most likely replace them reguardless since the set is acting like it is(I don't have it far enough from the screen to use the screen with the projector so i would have to look at the tubes to tell if pulling the board would work or not)
Still waiting on the tubes for my Ecp along with the hdfury(I think the bias board is going nutty in my Ecp as I noticed a arc spot on it and both the red and green tubes take a bit to get sharp)
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crt king of black
Last edited by the big E on Thu Jun 13, 2013 2:26 pm; edited 1 time in total
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Curt Palme
CRT Tech
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Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Thu Jun 13, 2013 2:26 pm Post subject: |
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Yep, good idea! Tubes on the way shortly with the Fury...
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:29 pm Post subject: |
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| Curt Palme wrote: | | Yep, good idea! Tubes on the way shortly with the Fury... |
Ok email me when you ship Them as the set teased me by letting me see a picture one time then started this grr at least I know nothing is major wrong with the set(just need to know where the video input board is as I get nothing from the video and a video inputs on the set)
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crt king of black
Last edited by the big E on Thu Jun 13, 2013 2:48 pm; edited 1 time in total
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gjaky
Joined: 05 Jun 2010
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:42 pm Post subject: |
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I have seen that so I need to know where the board is the the video inputs in the front of the set(unless that one board works all then I am good)
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 2:49 pm Post subject: |
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I forgot to ask when changing the caps did anyone do the power supply(I only ask so I can be sure)
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Thu Jun 13, 2013 3:15 pm Post subject: |
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I did not do the power supply under the projector. I honestly ran out of steam after recapping the boards. Probrably not a bad idea but It will be something I tackle later.
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 3:18 pm Post subject: |
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| Zolzar wrote: | | I did not do the power supply under the projector. I honestly ran out of steam after recapping the boards. Probrably not a bad idea but It will be something I tackle later. |
Since mine powers up I may save it for last also once I do the boards in the set if it is more trouble for me to do it I may send them to curt and have him do it
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gjaky
Joined: 05 Jun 2010
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| Posted: Thu Jun 13, 2013 4:29 pm Post subject: |
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Actually I did recapped two power supplies so far, and they also had bad caps inside just like the other boards of the machine, and both worked before the procedure. A refurbished power supply means cleaner output voltage to all boards, and may help shorten 'warm up' time when we talk about drifting for example. Also if a power supply goes out because of whatever reason it could literally ruin the whole set, if you have a bad day, so I think it is definitely a good idea to keep the PS fit too.
The input board where you plug your cables contains no active parts, so unless you pulled out the internal cables it should work .
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 4:32 pm Post subject: |
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| gjaky wrote: | Actually I did recapped two power supplies so far, and they also had bad caps inside just like the other boards of the machine, and both worked before the procedure. A refurbished power supply means cleaner output voltage to all boards, and may help shorten 'warm up' time when we talk about drifting for example. Also if a power supply goes out because of whatever reason it could literally ruin the whole set, if you have a bad day, so I think it is definitely a good idea to keep the PS fit too.
The input board where you plug your cables contains no active parts, so unless you pulled out the internal cables it should work . |
I haven't been around the part of the set inside yet but I am going to check it also to see if something has possible been pulled loose
I have been checking over the boards and haven't seen any leaking caps so far
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gjaky
Joined: 05 Jun 2010
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| Posted: Thu Jun 13, 2013 4:56 pm Post subject: |
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| the big E wrote: | | I have been checking over the boards and haven't seen any leaking caps so far |
The thing is they leaking towards their legs. If you remove some random caps you'll see that where the legs go in to the case they are wet, just a tiny drop, but they are getting wet.
I guess the projector wasn't fired up for a long time. So the electrolyte probably degraded, with this water aggregates from the electrolyte. Now that you began to play with the machine the capacitors warmed up with the boards and the internal pressure increased due to the improper electrolyte configuration so the electrolyte comes out now on the old seals. The most of the leaking process probably just begun right there right now. This is not the whole truth though, as the caps are dying without even turning them on, but now they are dying in an increased speed.
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 7:20 pm Post subject: |
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| gjaky wrote: | | the big E wrote: | | I have been checking over the boards and haven't seen any leaking caps so far |
The thing is they leaking towards their legs. If you remove some random caps you'll see that where the legs go in to the case they are wet, just a tiny drop, but they are getting wet.
I guess the projector wasn't fired up for a long time. So the electrolyte probably degraded, with this water aggregates from the electrolyte. Now that you began to play with the machine the capacitors warmed up with the boards and the internal pressure increased due to the improper electrolyte configuration so the electrolyte comes out now on the old seals. The most of the leaking process probably just begun right there right now. This is not the whole truth though, as the caps are dying without even turning them on, but now they are dying in an increased speed. |
Ok I have checked the set over and the only leaking cap I see is on the video output board the rest look ok should I still replace them as some are in a tight spot and I'd hate to ruin the board just to replace the said cap(the one on the video output board is a large one(I think) and is fairly easy to get to(considering I have to pull the board to get to it)
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crt king of black
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Thu Jun 13, 2013 8:01 pm Post subject: |
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If the system board is failing wouldn't that make it so I couldn't see the menus on the screen(which is what I only see after about a half of use before I started checking boards)
The only bad cap that has visible leakage is one on the video output board may be more considering how the set acted before I shut it down)
Edit update I pulled the point board and the grids are still a no show(I still suspect the video output board as the issue)
The profile for rgb shows 480p but the v h scan rates are higher then what 480p would be so I don't think I have a scan issue(just need to clear out the profile of the name it has but more on that later once I get the video output fixed)
Also there is a solid line which runs across the top of the screen of all three tubes unless I press one the tube buttons on the remote(not sure what is causing this unless its the video output board)
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