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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Sun May 25, 2014 4:18 am Post subject: |
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| jbmeyer13 wrote: | | I think this is making a little too much of it. In the current market, he can buy a "plug and play" solution from Curt (LC tube/housing with factory aligned magnetics) and not have to deal with 90% of this. Only tools required are an allen driver and screw driver. |
True. if you buy a tube with all of the electronics/coils already attached correctly, that's a lot of work done for you.
If you really want to get it right however, you still need to do the astig magnetics. That can't be completely done ahead of time as it depends on where you are on the planet and what orientation the projector is installed in.
Many people may not bother, but last time I did it on my last CRT projector it was a couple of hours of work.
Kal
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My basement/HT/bar/brewery build 2.0
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun May 25, 2014 4:55 am Post subject: |
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He will have to do the astig anyway, he is moving homes.
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Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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Elf Six
Joined: 24 Jan 2014
Posts: 21
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| Posted: Sun May 25, 2014 9:04 am Post subject: |
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| draganm wrote: | | Elf Six wrote: | ..by the way, it's not the VNB. Tried that already  |
ok then
swap the Red and blue leads on the focus board, see if the problem follows
or
swap the red and blue leads on the VIM module, the ones on top when you slide the VIM 2/3rds of the way out of it's slot. I see you have many Color correction boards so I'm sure you tried that.
If it's not the focus board or the VIM circuit (blue has a special Color tracking circuit to help minimize non-linearity with R & G), then I would start to suspect the tube |
Ok, did all that last night, no luck
Listen, I'm sort of good with having this problem until we get a JVC or the like. For the fun of it, how about
lens flapping? Could this be the problem? Upon inspection, the blue tube does seem to have the problem more
in the outer areas...which seems unlikely for a glycol problem?
Thanks
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tschaeikaei
Joined: 08 Apr 2013
Posts: 490
Location: Germany/Saarland
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| Posted: Sun May 25, 2014 12:20 pm Post subject: |
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You never did remove the lens and look into the tube if it is blurry itself?
You could have played with the scheimflug screws too much in the past. Maybe therefore optical focusing is not possible.
If you do optical focus that the screws at the blue lens (center and corner) are in the same area as greens and reds screws are...
is this the best focus achievable?
Regards Julian
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun May 25, 2014 4:50 pm Post subject: |
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| Elf Six wrote: | Ok, did all that last night, no luck
Listen, I'm sort of good with having this problem until we get a JVC or the like. For the fun of it, how about
lens flapping? Could this be the problem? Upon inspection, the blue tube does seem to have the problem more
in the outer areas...which seems unlikely for a glycol problem?
Thanks |
not really flapping. If flapping was off it would be unfocused either the top half vs. lower half of the screen, or the left side vs. right side.
About the only thing the lens could cause this is if it was too far away from the tube, and your center focus (knob closest to tube) was bottomed out, or too close and the center focus was maxed out. That seems extremely unlikely though.
Like someone posted above you should be able ot compare tube sharpness y looking directly into the tube faces and activating an internal grid patterns (push the # key), (wear sun-glasses ot protect your eyes)
If the red and green lines are think, and the blue is fat, then the tube is out of focus electronically, not mechanically. One last thing you can if you haven't done so, check your flare adjustment
Bring up the dot test pattern
Push pic, then 4 =focus , turn master-focus down to zero
Ramp contrast up to around 80/90
You can bring up just the blue tube by pushing color-3
You should see round circles with a dot in the center, if you see a comet with a tail then you have found your blurriness.
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