Originally Posted by rgtaa
since you got 3 of them that have bad focus, I got to ask you. "did you set it up the same place , all 3 of them?". I shared in the pa70g thread a few times how it's important with this PJ to line it up correctly to get "perfect focus". If it's 1 foot to the left of center of screen or 1 foot higher than center of screen you will get problems with focus. I likened it to having a flashlight from below pointing up towards screen , you get an OVAL instead of a circle. If flashlight is centered with center of screen you would get "circle of light". If you ceiling mounted it, all 3 would be unfocused.
On a few occassions, I picked the pa70g in different locations and got unfocused uniform image, I then keep moving the PJ until the image was all in focus.
You getting 3 pa70g's all unfocused could mean, your set up, it could also be LG quality control issue. It would be cool if you found out it is just a setup problem, right?
Here is my story with those PA75's I returned:
I did a complete focus test with letters repeating across the entire screen for each of them:
One was sharp on top and very noticeably blurry on bottom or it would do the opposite if you focused it the other way. You had to adjust the focus wheel within a micrometer to get tolerable focus but it still wasn't uniformly sharp and it would loose focus instantly if you slightly tapped the projector. In other words it was extremely sensitive with getting the image sharp.
The other one would not focus as sharply on the top half as it would on the bottom no matter where I placed the projector.
Another one had the center slightly blurred compared to the corners.
So I tried to fix this problem with two of them by opening the projector and completely unscrewing the lens in order to spin it differently and screw it back together, this would align the lens differently from the last time and I figure it might help.
The result was that once I tried my fix idea, the projectors still had the focus issues but now they were in a different spot, this made me realize that the lens was the issue since the blurriness moved when you moved the lens. Also just to clarify when I say moving the lens I don't mean adjusting the focus dial, I had to spin the whole lens clockwise and than screw it back and then try focusing it.
Now some might say that I should have ignored some of the blurriness but If I'm paying $700 for something then this is unacceptable.
I place my pj on my computer desk and beam it on a wall behind me, and I've tried placing it anywhere but that's not a solution either IMO because they are suppose to be small and portable so if I have to be careful with where I place them then this is not a good thing.