justin
Junior Member
Posts: 60 
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Post by justin on Dec 19, 2015 17:18:51 GMT -5
hello all. i read through some earlier threads here to see if anyone has had this same issue, but couldnt find anything. my cine 9 has some image noise in odd spots on the tube faces. i managed to take a few photos of the noise i can see through the red lens. the odd thing is, its really severe on the red. the green and blue have noise, but almost not visible. the red tube has this noise in the left and right upper section, and down the bottom right in the middle. its hard to pin point if its in the same spots on the green and blue as its only very light, but everywhere i concentrate looking?   i have black singe marks on a set of yellow wires on the power supply. i removed the power supply and smps and looked for anything burnt. nothing visibly wrong that stood out to my untrained eye there.  ^ if you look across to the smps, there is a yellow board. on that yellow board there was black dust like stuff on it. i could wipe it off with my finger. makes me wonder if something is on the way out.  ^ this is the back of the smps. is that white stuff corrosion? is this part of my problem? or a trail i can follow to the problem? i recorded a video of the quad/psu/smps area when i turn the cine 9 on and its on standby; ^ the camera picks up some more audible noise i cant hear over the fans. it sounds like a capacitor hiss or? anyway, to confirm the artifact i am seeing isnt source related, i changed the way i fed the cine 9. i did dvi-i out from my pc to a vga/bnc cable. then i did hdmi out from my pc to a hd video convertor to vga out, then to a vga/bnc cable. i remember seeing this noise when i had the projector setup in the lounge room through a pioneer bluray player also. if i go into the random access menu and use the cine 9's grid pattern over the source (1080p), the image wobbles left to right? is this normal? anyway, i hope i have given enough information to help trouble shoot this. speaking with another forum member it sounds like a quad failing. i do not have any other boards here to swap out to test either. thanks for your time. regards, justin. |
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Post by Casethecorvetteman on Dec 19, 2015 23:00:56 GMT -5
Are you hearing the noise from the SMPS or the PFC?
The pic you show looking into the set shows more of the PFC than the SMPS, but the board youve got pulled out is the SMPS.
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Post by Casethecorvetteman on Dec 19, 2015 23:08:58 GMT -5
You know what it sounds like to me?? Your quad is arcing... Pull out the board with the black metal cover and check over it, then id consider pulling that quad out and looking for signs of arcing or heat stress.
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Post by Casethecorvetteman on Dec 19, 2015 23:10:27 GMT -5
I cant see or hear anything in your pic, but the wobbling image is signs of HV issues sometimes.
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justin
Junior Member
Posts: 60
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Post by justin on Dec 19, 2015 23:30:14 GMT -5
i cant pin point the noise. its between the power supply and smps? i took the black metal covered board out (thats the smps correct?) and had another look over it. i can see this is corroded. i am about to head out, but will dissasemble the board when i get back. as well as remove the quad. do i need to take caution removing the quad? can i get a nasty zap? or is it sealed and okay to handle?  ^ this is after a second inspection of the black metal covered board. note the black dots around the heat sink and other components. this is what i can see on the power supply and smps. its everywhere in that back corner! thanks! |
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Deleted
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Post by Deleted on Dec 20, 2015 1:32:55 GMT -5
Those yellow wires are allways dusty. The black pics on the smps are normal too. The white stuff comes from heat conducting paste and is normal too.
I agree with Casey on the quad noise. But noone can be sure. Could be EHT (board with black metal cover) to?
Picture related stuff is difficult. Could be input switcher?
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Post by Casethecorvetteman on Dec 20, 2015 5:37:45 GMT -5
The EHT board is the little board that goes in near the quad, it has a black metal cover around it with some white text on it. No danger to remove, set turned off, unplugged, loosen off the two screws and slide it out. Dont really need to disconnect the quad to remove it, it should only have one red lead, and a big white plug. If there is two red leads its the wrong quad, but thats another story.
Id not be certain the quad will be your shaky image issue, but ive seen it with two quads right before they croak.
If you do ever need parts, email Greg Eisemann, he will look after you, and i will personally vouch for the quality of his parts.
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Post by Casethecorvetteman on Dec 20, 2015 5:44:38 GMT -5
Tell me more about this noise? Is it like flashing black horizontal lines at the edges?
That can be a couple things, its either HV, or poor setup. Its on all three, but red will be easier seen. If it is setup related, you need to sort out the astig and focus, in that order, because it is one of those two that cause it, i just cant remember which. You cant have good tight focus without good astig, and when the set has to work hard to do either one or both, it creates noise.
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Post by Casethecorvetteman on Dec 20, 2015 5:49:08 GMT -5
Looking at that second pic it is what i described, and will be either HV or setup, need to check out that HV gear and see whats what to start with.
check the 17v level too, full white screen at 1920x1080, should be ubove 17v, keep the meter on it and drop the white screen to black, voltage should rise, but not much. If it goes up a fair bit, your SMPS needs a bit of a re-sleave, its not holding voltages up under high loads.
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Deleted
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Post by Deleted on Dec 20, 2015 6:34:04 GMT -5
Looking at that noise again. I had something like that and it was convergence output.  |
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justin
Junior Member
Posts: 60
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Post by justin on Dec 20, 2015 6:35:56 GMT -5
its good to know barco, just like car manufacturers, made a part prone to failure to keep their spare parts department busy! then, they put it in the hardest to reach spot for servicing. if my hands were any bigger i'd have to remove a whole side. lol! i worked out a good little trick for getting the screw and nuts in from the side of the case. i put a bit of blu-tack on the inside of my socket (attached to a screwdriver handle style socket piece) to stop the screw/nuts from falling out and into the set. anyway, i got the quad out. it doesnt show any signs of arcing. around the seal where the pink hv cable comes out, the hose moves around quite freely. not sure if this compromises the silicone any (letting air into the unit?)    i guess i'll just have to buy a spare of quad, power supply, eht and smps? wont hurt to have them lay around (except maybe the quad. those things are shite!) regards, justin |
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justin
Junior Member
Posts: 60
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Post by justin on Dec 20, 2015 6:50:32 GMT -5
oops these replys happened while typing my reply. okay! i had to remove the eht (didnt know it was that at the time) to get to the quad anyway. i had a look at it and it looked fine. i just downloaded the barco documentation from the pinned thread. i now know which board is which. the picture i put up earlier with the corrosion, that was from smps1. smps2 looks fine. i dont know where to place the voltmeter to read 17v casey? i looked at the internal diagnostic page that output voltage the other night and took a photo. i understand this is not what you are describing i need to do.   also, i dont know anything about astig. i never touched it. i read through my user manual i need to turn those nuts on top of the lenses? correct? |
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justin
Junior Member
Posts: 60
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Post by justin on Dec 20, 2015 6:54:56 GMT -5
casey, this noise i see is like a blotch of streaking or smearing? its transparent. it is smudging the output (whatever i display.) you know what, it very well could just be as you describe! astig is the corner adjustment? is that correct? its on the sides and is about an inch wide on either side. and in the middle at the top of the tube face too about an inch wide.
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Deleted
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Post by Deleted on Dec 20, 2015 6:55:44 GMT -5
Hi Justin sadly a quad does not show it on the outside when it has failed. The noise you hear is the only thing. You can inspect the EHT board for burned resistors. The quad does not get bad when you remove it like this.
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Deleted
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Post by Deleted on Dec 20, 2015 6:56:33 GMT -5
casey, this noise i see is like a blotch of streaking or smearing? its transparent. it is smudging the output (whatever i display.) you know what, it very well could just be as you describe! astig is the corner adjustment? is that correct? its on the sides and is about an inch wide on either side. and in the middle at the top of the tube face too about an inch wide. Do you have extreem setting for astig or convergence or focus in the corners? |
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