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moby
Joined: 18 Nov 2008
Posts: 64
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| Posted: Sun Aug 16, 2009 5:49 pm Post subject: |
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im pretty sure I did connect the G2 Bias correctly on the neckboard ill check again tonight
I replaced the HVPS because my crt was making a problem one day. and you told me it was the hvps. Only the red tube was turning on and it was shutting on and off.
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http://www.curtpalme.com/forum/viewtopic.php?p=171911
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Aug 16, 2009 6:14 pm Post subject: |
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I too think its a deflection Burn...
The deflection burn possibly could happen if the HDM or the VDM cables were not connected properly or not connected at all. When you first replaced the board back into the PJ were all the cables correctly connected from the VDM(on the back of the PJ heat sink) and HDM( between the green and blue tubes)? And did it turn on on your first try or did you have to re check the connections and then get it to turn on?
But on the other hand since you mention the Red tube problem above it could have been the G2 connected wrong on the Red VNB like Dragan mentioned.
Athanasios
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Last edited by Nashou66 on Sun Aug 16, 2009 6:21 pm; edited 1 time in total
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Aug 16, 2009 6:20 pm Post subject: |
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| stefuel wrote: | | I would closely examine all three tubes before going any further. For that line to be the shade of green shown would mean the lack of blue along with red in the same area. If it were me, I'd pull the lenses and do a real good inspection of all the tube faces. |
Chip, this is not necessarily true in this instance. When viewing a colored image, the image may not be normally using any blue to begin with and therefore would be only green and red. Since the images being shown are shades of yellow and red then this would in fact mean the blue has very little if any input. You would need an all white picture to support various color loss. But I agree that all three lenses should come off and be checked.
I would pull the red lens and make sure thats not a drip of some kind on the lens surfaces. If it is in fact a deflection burn and based on its shape and direction then it is most likely from a spot kill circumstance. Problem here is that if the red was originally flickering on and off due to a HV situation and not a video situation then the spot kill may have not been able to catch it consistently, even if it was working properly.
At any rate, the lens has to come off......
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sun Aug 16, 2009 7:13 pm Post subject: |
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You could also just turn the contrast and brightness down and look through the lenses. A deflection burn should be obvious on the CRT face.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Aug 17, 2009 1:34 am Post subject: |
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Hi Moby, I looked back at previous posts and it looks the problems you are describing were there starting in February.
| moby wrote: | PostPosted: Mon Feb 02, 2009 2:09 am Post subject: new problem with marquee
Hey guys.
After having watched half a dozen movies on my new marquee, a "flickering" of the picture is starting to occur. sometimes the picture goes completely black for a second this can happen 10 times within 30 seconds or 30 minutes plus the picture afterwards look kind of disturbed. primaryly these 3 observations.
-the entire picture sort of shakes now and then
-The entire picture sometimes shifts from a normal colorshade to a sligth lighter colorshade
Another observation Ive made is the blackshade. Its like the smoothness of the blackshade is not there. Its like the shades of black are divided into to blocks and the picture shows the 2 shades divided like that.
Im getting pretty annoyed with my marquee. Any suggestions whats wrong?
Moby |
| moby wrote: | Posted: Fri Jul 03, 2009 12:38 pm Post subject: whats happening with my marquee??
Hey guys!I own a a marquee 9500 lc ultra. And its has been working flawlessly for a year or so. Today when i turned on my crt it started messing up. The only thing that turned on was the red tube and only for about 5 seconds, until the picture turns black and then it start over and over again. what the heck is going on? |
| moby wrote: | im pretty sure I did connect the G2 Bias correctly on the neckboard ill check again tonight
I replaced the HVPS because my crt was making a problem one day. and you told me it was the hvps. Only the red tube was turning on and it was shutting on and off. |
Moby when a machine that's so far away has problems it's very hard to pin it down. In this thread I, Nash, Tim and a few others responded and based on the information we had at the time made a best guess at the HVPS. IT appears that based on your first post the red tube was in fact having problems.
https://www.curtpalme.com/forum_archived/viewtopic.php@t=16858.html
At the end of that thread you said there was a ticking noise at the HVPS and I suggested replacing it. Also I recommended my mod's even though your machine was having some problems at the time. For that I am also responsible in how this has ended up.. In my add on this web-site I state that "this is not a repair service" but have on a few occasions given people the impression some of the problems they were seeing might be fixed by my work. I was wrong for doing so and I'm sorry the issues you were having are still there and in addition the Red tube is now damaged  I will do everything I can to help remedy this situation.
it sounds like the red VNB might had a problem from before so Please send the Red VNB back to me, it should be pretty inexpensive small box and I will test it here for an extended period. hopefully the problem shows up again as the machine I use has worn tubes so no problem with deflection burn if it happens here. If the card is in fact defective, I will repair it or replace it. I do have 2 good red tubes but they are both 8 inch tubes. If you can find a used 9 inch red, please purchase and send it to me. I would think a clean red tube should be no more than $200. I will pot it into your old Aluminum frame with new a bellow's, fill with new Glycol, and ship it all back to you. i'll cover the costs for the above mentioned things, minus tube, but including bellows and return shipping to EU. I would really like to help get this machine in perfect working condition, and it shouldn't be a problem or big expense.
| Nashou66 wrote: | I too think its a deflection Burn...
The deflection burn possibly could happen if the HDM or the VDM cables were not connected properly or not connected at all. When you first replaced the board back into the PJ were all the cables correctly connected from the VDM(on the back of the PJ heat sink) and HDM( between the green and blue tubes)? And did it turn on on your first try or did you have to re check the connections and then get it to turn on? |
Nash the marquee won't power up if H or V is connected wrong. The CLM looks for that before turning on the High voltage. IT does not look like things were connected wrong, but there was simply a problem that either didn't show up here or it's a problem somewhere else in the chassis
| Nashou66 wrote: | But on the other hand since you mention the Red tube problem above it could have been the G2 connected wrong on the Red VNB like Dragan mentioned.
Athanasios |
I doubt it's connected wrong, the raster would have been lit full-up and re-trace lines visible. The VNB is and was likely bad based on posts from July.
Last edited by draganm on Mon Aug 17, 2009 3:57 am; edited 1 time in total
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Aug 17, 2009 1:43 am Post subject: |
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| macgyver655 wrote: | I would pull the red lens and make sure thats not a drip of some kind on the lens surfaces. If it is in fact a deflection burn and based on its shape and direction then it is most likely from a spot kill circumstance. Problem here is that if the red was originally flickering on and off due to a HV situation and not a video situation then the spot kill may have not been able to catch it consistently, even if it was working properly.
At any rate, the lens has to come off...... |
thanks for jumping in guys. I appreciate all the help and it's good to have more than one brain on this. It seems based on the original flickering that the red VNB was a culprit and changing the HVPS didn't help here. Thankfully it looks like it's only the Red and not blue or Green, I hope.
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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: Thu Aug 20, 2009 2:01 am Post subject: |
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A deflection burn is REALLY rare with any Marquee. I've pulled yoke wires while the set was on, multiple times to try and burn a tube, and the set shuts down too quickly for the tube to burn.
I'd suspect:
1) Loose G2 lead on the neck board
2) Operator error somehow
3) Failure of the modded board(s)
DO NOT install a new tube without running this set for 200 hours or so to make sure whatever caused the problem is cured. I got your email, I'll check on the tube tomorrow.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Sep 17, 2009 4:42 pm Post subject: |
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a follow up to this thread. I asked moby to send me some cards, the 3 VNB's + the CLM, VIM, and LVPS. First thing I did was check the VNB's, these are the 3 cards I replaced the EL caps on, no other work was done to them.
When I originally worked on these boards, they're from a 9500 ultra, I noted in an e-mail to moby that 2 of the video neck-boards (VNB"S) were replaced and were from an 8500. I believe the last remaining original 9 inch card is defective. The reason I didn't catch this when I tested the stuff here is that the problem is very intermittent. The machine can run for 3 hours without any problems but then will randonly shut down the high voltage and then instantly bring it right back up again. removing this card seems to have made the problem go away but I need to run it some more to be sure. the low voltage power supply seems fine . I have not tested the control module yet.
I cannot duplicate the other problem Moby described which is a shaking picture
| Quote: | moby wrote:
PostPosted: Mon Feb 02, 2009 2:09 am Post subject: new problem with marquee
Hey guys.
After having watched half a dozen movies on my new marquee, a "flickering" of the picture is starting to occur. sometimes the picture goes completely black for a second this can happen 10 times within 30 seconds or 30 minutes plus the picture afterwards look kind of disturbed. primaryly these 3 observations. -the entire picture sort of shakes now and then |
At any rate I believe what happened is when his HVPS failed back in July, the defective VNB was not able to shut the Red tube down properly and that's what caused the spot burn . Curt is it worth having you repair this card? I know there was a thread a while back that talks about the Marquee VNB and what happens when the beam shut off circuit malfunctions. TSE commented in there about the trimmer potted in Gray epoxy and it's imprtance but I can't find it?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Sep 21, 2009 7:04 pm Post subject: |
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| Nashou66 wrote: | the problem on his CLM could be U7 on the DPB and or the connector to the DPB need re-soldering.
Athansios |
I'm really it a loss on this one  I had all 3 neck-boards, the CLM, and LVPS from this machine running for hours and cannot get the shaking raster or color shifting to happen here. I can't even get it to re-produce the occasional HV shut-down/restart to hapen like when I first installed the VNB's.
This machine had an odd-ball little black box soldered onto the geometry section of the Ultra FGM, about the size of a book of matches. It had labels on it in german pertaining to ketstone, pin and such and is obviosuly not factory. could this little POS be causing voltage fluctuations on 1 or more of the rails?
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1031
Joined: 22 Mar 2006
Posts: 657
Location: Finland
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| Posted: Tue Sep 22, 2009 5:59 am Post subject: |
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| draganm wrote: |
I'm really it a loss on this one I had all 3 neck-boards, the CLM, and LVPS from this machine running for hours and cannot get the shaking raster or color shifting to happen here. |
I had that odd (possibly same issue) picture shaking in past. I added more pixels to H-Sync from my VP-50 -> problem solved.
Funny part was that when picture was shaking ,it looked that problems was belly fans, every time i unplugget belly fans, picture was stabil, so i looked that problem at wrong places (tested different fans, shileding fans, powersupply etc....)
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