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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Thu Feb 19, 2009 12:51 pm Post subject: |
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| Gary M. wrote: | | Nashou66 wrote: | Id send the suspect board to Curt for testing gary....this really sucks for you man. Hope you get it going!!!
Athanasios |
if and when I can figure out with this is I certainly will
I did get the scan fail to be completely removed from the system, but in doing so I fried my RGB board being I had the neck card and magnetics connected up inside minus the tube, it must have not like that at all
I saw a transistor inside on the RGB board on the designated green portion of the signal glow bright orange 
anyway, that is not a biggie, RGB boards are 70$ and I may even be getting a mod set from someone soon which that would include anyway 
my problem is no HV at this point and the error light on the controller lighting when a key is pushed
nothing is happening on the EHT so I am thinking it may be that, just got a new confirmed working quad so it has to be the EHT, it blew a fuse last night so it pretty much confirms it
-Gary |
Hmmm On the marquee the neck boards can be connected while not connected to the tube, it should be the same for most sets id take it. You should have had the scan coils on the tube at least even though you didn't have the neck board connected to the tube, as long as the heaters and G2 are not connected nothing will happen. I wander if any magnetic feilds went astray
from the scan coils and did something, but doubt it.
Id just get a new transistor and replace the red one, also test any diodes before and after the transistor along with any resistors.
Athanasios
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WTS
Joined: 08 Mar 2006
Posts: 1276
Location: Calgary
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| Posted: Thu Feb 19, 2009 2:27 pm Post subject: |
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Well it may not be as easy as just replacing that transistor to fix the RGB board, I would check out the rest of the circuitry that its tied to, let me know what transistor it was. I don't understand why all the problems, I thought this was a working machine when you got it.
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Walter
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Gary M.
Guest
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| Posted: Thu Feb 19, 2009 2:42 pm Post subject: |
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the RGB board worked just fine everytime I fired the set up for these months I have been working on it, it instantly started cooking when I fired the set up without the green tube and all its gear connected up to see if that was the scan fail problem(which it was), and being it was exactly the green area labeled on the RGB board it can't be a coincidence
no biggie
-Gary
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Thu Feb 19, 2009 3:10 pm Post subject: |
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Didn't you have a HV issue before you took it apart?
| Gary M. wrote: | | jkruger wrote: | How many other vultures are out there waiting for a chance at this pile of parts?  |
too funny, it was pretty scary to see it in that shape 
all is good now
-Gary |
Hope you get it fixed Gary... Really I do...
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Gary M.
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| Posted: Thu Feb 19, 2009 3:46 pm Post subject: |
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| jkruger wrote: | Didn't you have a HV issue before you took it apart?
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yes, that is why I took it apart to clean refurbish everything, I had a bad quad and the EHT seemed to be working fine, I got a new confirmed working quad and now it seems the EHT is just sitting there doing nothing, not even a red light, it is blowing fuses as well
upon the fire up yesterday I had a scan failure and come to find it is because my green tube is not connected or installed yet, this came at the expense of my RGB board, so whatever, not too bad, I will get her going soon
thanks
-Gary
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r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
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| Posted: Thu Feb 19, 2009 4:01 pm Post subject: |
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| Gary M. wrote: | | jkruger wrote: | Didn't you have a HV issue before you took it apart?
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yes, that is why I took it apart to clean refurbish everything, I had a bad quad and the EHT seemed to be working fine, I got a new confirmed working quad and now it seems the EHT is just sitting there doing nothing, not even a red light, it is blowing fuses as well |
When EHT-fuses blow you have an issue! Either a defect FET on the EHT-board (or something else) or a defect Quadrupler.
When projectors have not seen any usage for a long period, the quad can go bad quickly. Maybe that has happened to your new quad also. How long was your quad tested for? How long ago has it seen regular use?
Also bad quads can absorb all the power that the EHT board puts into it and have no 35kV coming out of them. When that happens they have a 'mild' short circuit; not causing the EHT to shutdown but getting hot from absorbing all the EHT power. This situation will not last long and either kill your EHT or seriously burn your quadrupler while smelling very bad!
Get more parts and change one thing at a time, although that may be difficult when you have two problems in a projector. Work accurately, take measurements if possible and you will find the problem. Just stay calm all the time.
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Thu Feb 19, 2009 5:43 pm Post subject: |
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What color was the magic smoke? Green?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Thu Feb 19, 2009 6:43 pm Post subject: |
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| Gary M. wrote: | | jkruger wrote: | Didn't you have a HV issue before you took it apart?
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yes, that is why I took it apart to clean refurbish everything, I had a bad quad and the EHT seemed to be working fine, I got a new confirmed working quad and now it seems the EHT is just sitting there doing nothing, not even a red light, it is blowing fuses as well
upon the fire up yesterday I had a scan failure and come to find it is because my green tube is not connected or installed yet, this came at the expense of my RGB board, so whatever, not too bad, I will get her going soon
thanks
-Gary |
Gary try firing up the projector with the HV lead removed from the splitter again. Sounds like a bad EHT/quad though...
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Gary M.
Guest
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| Posted: Thu Feb 19, 2009 8:51 pm Post subject: |
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| Tom.W wrote: | | Gary M. wrote: | | jkruger wrote: | Didn't you have a HV issue before you took it apart?
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yes, that is why I took it apart to clean refurbish everything, I had a bad quad and the EHT seemed to be working fine, I got a new confirmed working quad and now it seems the EHT is just sitting there doing nothing, not even a red light, it is blowing fuses as well
upon the fire up yesterday I had a scan failure and come to find it is because my green tube is not connected or installed yet, this came at the expense of my RGB board, so whatever, not too bad, I will get her going soon
thanks
-Gary |
Gary try firing up the projector with the HV lead removed from the splitter again. Sounds like a bad EHT/quad though... |
Tom, I tried that, made no difference though sadly
thanks
-Gary
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Gary M.
Guest
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| Posted: Thu Feb 19, 2009 9:01 pm Post subject: |
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| r.bauer wrote: | | Gary M. wrote: | | jkruger wrote: | Didn't you have a HV issue before you took it apart?
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yes, that is why I took it apart to clean refurbish everything, I had a bad quad and the EHT seemed to be working fine, I got a new confirmed working quad and now it seems the EHT is just sitting there doing nothing, not even a red light, it is blowing fuses as well |
When EHT-fuses blow you have an issue! Either a defect FET on the EHT-board (or something else) or a defect Quadrupler.
When projectors have not seen any usage for a long period, the quad can go bad quickly. Maybe that has happened to your new quad also. How long was your quad tested for? How long ago has it seen regular use?
Also bad quads can absorb all the power that the EHT board puts into it and have no 35kV coming out of them. When that happens they have a 'mild' short circuit; not causing the EHT to shutdown but getting hot from absorbing all the EHT power. This situation will not last long and either kill your EHT or seriously burn your quadrupler while smelling very bad!
Get more parts and change one thing at a time, although that may be difficult when you have two problems in a projector. Work accurately, take measurements if possible and you will find the problem. Just stay calm all the time. |
thanks for the tips
I have this down to one problem now, just no HV
disconnecting the HV splitter as Tom said makes no difference, so it is out, the EHT has no lights at all on it, nothing
the G2 board and quad are new replacements, sounds like the EHT doesn't it?
-Gary
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secstate
Joined: 20 Mar 2006
Posts: 720
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| Posted: Fri Feb 20, 2009 2:32 pm Post subject: |
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Gary in my limited experience with Barco EHT issues it does sound like the EHT board is a likely suspect. Normally bad quads make it go into EHT holdown with the associated LED being on. Also a lot of quads don't completely fail so you often hear some sort of distress noises before the EHT hold down engages. That said my experience in this area is relatively limited so take it for what it is worth.
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Gary M.
Guest
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| Posted: Fri Feb 20, 2009 3:28 pm Post subject: |
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| secstate wrote: | | Gary in my limited experience with Barco EHT issues it does sound like the EHT board is a likely suspect. Normally bad quads make it go into EHT holdown with the associated LED being on. Also a lot of quads don't completely fail so you often hear some sort of distress noises before the EHT hold down engages. That said my experience in this area is relatively limited so take it for what it is worth. |
that is exactly what the original quad did in this unit, distress and funky smell and then LED on EHT
this is a bad EHT for sure, I am 99.5% certain of it, all the playing around with the old quad and damaged G2 board probably cooked it
-Gary
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Gary M.
Guest
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| Posted: Tue Mar 03, 2009 5:46 am Post subject: |
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got her going today with a huge help from MP, my EHT board was bad
everything is fired up and rockin normal, but remember my funky smell? the fried video board, so I have no image only a bright full blown raster with the video leads connected at the neck cards, so that is the last piece of the puzzle, so close 
thanks to MP who also sold me a green P19LUG at a killer price with very very faint wear, slapped the green c-element on her, filled with glycol and installed
gettin close!!! 
-Gary
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Mar 03, 2009 6:28 am Post subject: |
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Gary are you saying all the video amps are in overdrive with no input ?
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Gary M.
Guest
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| Posted: Tue Mar 03, 2009 7:56 am Post subject: |
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no, only with video input connected is there overdrive
after the initial firing up I decided to take a look at everything, specifically the green tube to make sure the install went ok, check for glycol leaks
I found 3 big spot burns on the newly installed green tube,  blue and red ok
I give up!! seriously, time for a RS20 
-Gary
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Gary M.
Guest
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| Posted: Tue Mar 03, 2009 11:40 am Post subject: |
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ok, let me make this clear for everyone
NEVER and I mean NEVER fire up the 1209 pj with all the workings of the tube connected minus the actual tube, I did this to see if my scan failure would go away, I found out it did but not without a big cost
a roasted video chain, both RGB boards and you guessed it the green neck card, which in turned gave me spot burns on this newly installed wonderful green tube that was a fabulous deal to boot, wasted time, wasted working parts/tubes, wasted $$$
I can't believe this sh*t
-Gary
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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: Tue Mar 03, 2009 1:34 pm Post subject: |
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| Gary M. wrote: | ok, let me make this clear for everyone
NEVER and I mean NEVER fire up the 1209 pj with all the workings of the tube connected minus the actual tube, I did this to see if my scan failure would go away, I found out it did but not without a big cost
-Gary |
BULL SH*T!
I do this all the time, all makes, all models. you did something else to the set, or something shorted out or the neck board hit the motherboard traces, or....
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WTS
Joined: 08 Mar 2006
Posts: 1276
Location: Calgary
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| Posted: Tue Mar 03, 2009 2:18 pm Post subject: |
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Geez, I thought Gary was an expert at this sh!t too. Sorry to hear things went so bad on such a great PJ. Take a break and then get a freash start and bring this baby back to life.
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Thanks
Walter
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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MikeEby
Joined: 24 Jun 2007
Posts: 5237
Location: Osceola, Indiana
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| Posted: Tue Mar 03, 2009 2:23 pm Post subject: |
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Personally Gary it concerned me when you were doing all of the modifications like swapping out cables and so forth without getting the projector running first. You had no baseline but I tend to be conservative when it comes to these things. I’m very sorry about your tube that really does suck.
Mike
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