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Post by Casethecorvetteman on Nov 5, 2015 21:15:26 GMT -5
I guess you want fox to help you so have fun. Dont let that happen!!
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Post by mastertech on Nov 5, 2015 21:26:13 GMT -5
I guess you want fox to help you so have fun. Dont let that happen!! Hey, I cannot force people to listen to me, LOL. But when they dont do what I tell them to then all I can do is watch.
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Post by Casethecorvetteman on Nov 5, 2015 22:39:45 GMT -5
Hey, I cannot force people to listen to me, LOL. But when they dont do what I tell them to then all I can do is watch. I know yeah, and you and me started on this very note with our first conversation many years ago. We have both suffered that same frustration!! Its very frustrating.
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Post by jaredjaric on Nov 6, 2015 2:37:49 GMT -5
I would be testing all voltages coming into the EHT board. Just be careful. To my understanding that is the voltage that comes direct from the PFC. There is a measuring point on the PFC. I once measured there to see if I had the right voltage something like 380V dc if I remember well. The PFC has a current sense that adjusts this voltage. There could be a problem there. You need to measure M102. But it is next to grnd measure point. I would suggest soldering a wire. I tested 224 volt dc on the m102 test point is this allright?
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Post by Casethecorvetteman on Nov 6, 2015 4:00:45 GMT -5
To my understanding that is the voltage that comes direct from the PFC. There is a measuring point on the PFC. I once measured there to see if I had the right voltage something like 380V dc if I remember well. The PFC has a current sense that adjusts this voltage. There could be a problem there. You need to measure M102. But it is next to grnd measure point. I would suggest soldering a wire. I tested 224 volt dc on the m102 test point is this allright? Follow the advice of Master Tech, he is the foremost expert here, ive been around a long time and yet to see anyone match his exploits. This bloke has talent that goes beyond the common man, and you couldnt find better advice.
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Post by hulio on Nov 6, 2015 6:04:10 GMT -5
Guys, don't get mad at each other. Life's to short and complicated enough for that. Justin, it seems to me that you are dealing with two issues here: overvoltage and, more important, the protection circuit does not kick in. You should get a HT hold down before something gets damaged. You did not fiddled with that pot on the spitter did you ? The feedback voltage to the EHT is dependent of that and is factory adjusted. Never touch that, or you'll keep burning things. On the HV part, the EHT is the only component wich requires adjustments. For some adjustments you'll need a DMM, a HV probe and an oscilloscope. Not so easy and not without danger if you don't know how to do it. So i don't advise you to do anything here, i am just passing some info. I do belive that Mastertech is the one with the most electronics knowledge amoung us ( i am not ), and can "translate"that info for us. So, before you do something, wait for his advice. Here two docs regardig the adjustments and the working of the EHT. Hope it helps. EHT_Adjustment.pdf (72.93 KB) EHT_Description.pdf (35.13 KB)
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Post by Deleted on Nov 6, 2015 6:19:31 GMT -5
Hey, I cannot force people to listen to me, LOL. But when they dont do what I tell them to then all I can do is watch. What do you mean. I provided some extra information for you to comment on. I did not take over. I even put some time in it because I know the 909 chasis and you have never had one in your hands. What I said was that the EHT gets its voltage directly from the PFC so you can measure there. It might be easier. I added this disclaimer: Some additional info: Mastertech do you agree that he could measure on the PFC instead on the EHT? The EHT is more difficult to acces I think. Read more: repairalmostanything.com/thread/262/another-cinemax-issue?page=3#ixzz3qiDMi0Gj
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Post by Deleted on Nov 6, 2015 9:45:53 GMT -5
One more problem is that the manual has contradictions here and that there are two types of PFC's.
So I guess best thing will be to measure on the EHT like Mastertech suggest. By the way I do not want to suggest I have the same level of expertise. Just trying to help.
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Post by mastertech on Nov 6, 2015 10:13:03 GMT -5
I was really only joking. I just thought it was funny. I guess it was just dry humor. But, when I said to check voltages on the EHT I meant "all" voltages, not just the 300v supply. And I am not sure that supply comes directly from that section of the PFC for that test point. There is either a contradiction in the manual or there is a 300v supply AND a 380v supply. Since I do not have a 909 to verify I figured it best to test right on the EHT connector. If connector is not accessible just use tiny fly wires. Size of wire does not have to be of a certain. You are only testing for correct voltage,not drawing much current. Note generation of 2 different supplies. But they supposedly exit though the same connector. Very confusing. These are from the same 909 manual. Is the "input mains" the same board as the "PFC".
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Post by mastertech on Nov 6, 2015 10:18:49 GMT -5
Oh, and I am glad that redfox contributes. I can surely miss something sometimes or he can correct something because I do not have an actual projector to verify some things on. The manual can be incorrect or there can be more then 1 version of a board. Haven't we seen this many times over already on these Barco's? And thank you Hulio for all your assistance. You have cleared up many discrepancies in our adventures here.
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Post by jaredjaric on Nov 6, 2015 15:11:42 GMT -5
Guys,
To complicate matters more. just finished setting up the 909 i got from Curt hours ago, on the start the 909 was a bit erratic and video was modulating a bit , the green was not focused or sharp enough. Green crt is a lug03xxx 43. Looks new based on the stickers and labels. Now 5 to 6 hours later , losing the video or the video was modulating more. Eht led lit up , dying quad again. Started it up again , video came back but still modulating. here is where i stop.
The good news,the green crt seems to be sharper now. the bad news is all four quads are dead.
This is a big mystery,what gives. Video processor now is a radiance xe with the moome card. All 909 parts were the original that came with it, quads came from a 919 from curt also.
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Post by jaredjaric on Nov 6, 2015 15:17:28 GMT -5
I was really only joking. I just thought it was funny. I guess it was just dry humor. But, when I said to check voltages on the EHT I meant "all" voltages, not just the 300v supply. And I am not sure that supply comes directly from that section of the PFC for that test point. There is either a contradiction in the manual or there is a 300v supply AND a 380v supply. Since I do not have a 909 to verify I figured it best to test right on the EHT connector. If connector is not accessible just use tiny fly wires. Size of wire does not have to be of a certain. You are only testing for correct voltage,not drawing much current. Note generation of 2 different supplies. But they supposedly exit though the same connector. Very confusing. These are from the same 909 manual. Is the "input mains" the same board as the "PFC". I can have a tech guy do the measurements for me, but i rather do the board swapping thing to isolate the problem, to save on work hours. Barco parts can not be that inconsistent to vary from 6 hours of use to 20k hours. My old cinemax has more than 10k hours running time, with only standby board failure. The quad i bought was a new old stock also.
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Post by mastertech on Nov 6, 2015 15:25:28 GMT -5
Guys, To complicate matters more. just finished setting up the 909 i got from Curt hours ago, on the start the 909 was a bit erratic and video was modulating a bit , the green was not focused or sharp enough. Green crt is a lug03xxx 43. Looks new based on the stickers and labels. Now 5 to 6 hours later , losing the video or the video was modulating more. Eht led lit up , dying quad again. Started it up again , video came back but still modulating. here is where i stop. The good news,the green crt seems to be sharper now. the bad news is all four quads are dead. This is a big mystery,what gives. Video processor now is a radiance xe with the moome card. All 909 parts were the original that came with it, quads came from a 919 from curt also. What is the voltage coming out of your wall outlet?
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Post by jaredjaric on Nov 6, 2015 16:01:57 GMT -5
Guys, To complicate matters more. just finished setting up the 909 i got from Curt hours ago, on the start the 909 was a bit erratic and video was modulating a bit , the green was not focused or sharp enough. Green crt is a lug03xxx 43. Looks new based on the stickers and labels. Now 5 to 6 hours later , losing the video or the video was modulating more. Eht led lit up , dying quad again. Started it up again , video came back but still modulating. here is where i stop. The good news,the green crt seems to be sharper now. the bad news is all four quads are dead. This is a big mystery,what gives. Video processor now is a radiance xe with the moome card. All 909 parts were the original that came with it, quads came from a 919 from curt also. What is the voltage coming out of your wall outlet? 240 volts
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Post by jaredjaric on Nov 6, 2015 16:03:11 GMT -5
Guys, To complicate matters more. just finished setting up the 909 i got from Curt hours ago, on the start the 909 was a bit erratic and video was modulating a bit , the green was not focused or sharp enough. Green crt is a lug03xxx 43. Looks new based on the stickers and labels. Now 5 to 6 hours later , losing the video or the video was modulating more. Eht led lit up , dying quad again. Started it up again , video came back but still modulating. here is where i stop. The good news,the green crt seems to be sharper now. the bad news is all four quads are dead. This is a big mystery,what gives. Video processor now is a radiance xe with the moome card. All 909 parts were the original that came with it, quads came from a 919 from curt also. What is the voltage coming out of your wall outlet?
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