Question about InFocus ScreenPlay 4805 Multimedia Projector

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Slanted Border- Projector image is not square

My Pj projects a picture that is tappered on one side. In other words the left edge of my screen is 36" and the right side is 33". This creates a slanted border at the top of the projected image. None of the keystone options have an effect on this problem. Is there some other reason I would be experiencing this issure?

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Is the image slanted on the bottom as well?
Make sure the projector's throw is pointed directly at the target ie. screen or wall etc. there's not much else it could be.

Posted on Nov 29, 2009

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Related Questions:

Tip

Overhead Projector Tip- best results!!


For best results, slant the screen forward slightly so it meets at a 90 degree angle with the projected image light beam. In not, then a keystone effect results where the projected image is taller on top or on the sides; in other words, the projected image is a parallelogram, not a square.

on Aug 16, 2010 | Office Equipment & Supplies

1 Answer

The top of the screen is slanted while the sides of screen and bottom are even, causing the right hand side of screen to appear smaller than the left. Anyway to fix this?


Sounds like a "keystone" problem. Your projector needs to be oriented to the screen in an exact manner. Manufacturers provide "keystone" correct to adjust for mis-alignment. If proper orientation is impossible, use the keystone correction of the unit to adjust your edges.

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1 Answer

Image problem


IF I understand the problem from the limited info in your question, the problem is a distorted picture on whatever surface [probably a wall, or screen] onto which the image is projected.

With all lenses, the axis [centerline of the lens projected] MUST be absolutely PERPENDICULAR [in both the vertical and horizontal planes] to the perfectly plane [flat] surface onto which the image is projected.

IF for example, the projector is mounted in a rear corner of the room, and the camera is aimed downward and to one side to project the image on the center of the opposite wall, or a screen located there, the image will be distorted. It will be larger on one edge [fartherist from the lens] and smaller on the opposite [nearest] edge.

If it is non-perpendicular in only one axis, then two opposite edges will be different lengths, and if out of perpendicular in two axis then no edges will be the same length.

The solution to this problem is that the center axis of the lens must be perpendicular to the surface projected on, in both vertical and horizontal axis.

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1 Answer

Double Vision (Mainly around the edges of the screen)


Look for your Convergence amps and check the solder connections on them....you may only have to resolder the amps...and if they fail in a couple weeks, then replace them...

If you don't beat up the convergence amps for WEEKS operating them with the bad connections, they can survive...

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see if the mirror in side is broke or cracked

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That is caused by a collapsing light pipe.
This is a mirrored glass square component that is located directly behind the color wheel. It is comprised of 4 mirrored section approximately 40mm x 8mm that are glued together with a hi-temp adhesive to form a square. The artifact you see is one of these mirrored glass section's has come unglued and has moved inwards blocking one edge of the image. The edge of this shadow is not shar because this failure is not at a focal point.WHEW..all that being said it's possible to re-glue it if you are electro-mechanically savvy and have steady hands. If you need to take it to a service they will most likely just just replace the complete DLP engine (the whole optic assembly) Hold on to your wallet!!


Cheers

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Hitachi PJ-TX10 alligment


i have one of these projectors found on setting it up that the projector must be square on with the screen, the pjtx10 doesn't have ant "wedge type" setting like sony does. if this doesn't fix problem there is some thing not aligned in the lense

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1 Answer

Slightly slanted screen/picture


your main filter capacitor in power supply has gone defective.

just replace it .

every thing will be normal.

good luck.

 

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