[krustyone]

I am attempting to center the raster area on

my xg135. My question is;


Can I use the internal test pattern for this

or should I use a signal based test pattern,

such as avia/v.e. ??.


The reason for asking is that this makes sense

for my NR scaled dvd signal, but when I use the

pass-thru for hdtv material I will need to touch

up the convergence. My internal test pattern

will be the only source for this, as I obviously

cannot generate my own test pattern. The internal

test pattern, at this moment is shifted off the

screen by about a foot, making it hard to use it

for the right side convergence.


I am starting with raster centering to try and

solve the +100 vertical keystone setting

that was put in by my local "expert" and seems to

be causing some flaring problems on the left side.


Any help is greatly appreciated.

Thanks,

Jon.

 

[KennyG]

For Raster Centering I don't think it matters, all you want to do is light up the raster, which you can do with either, but I use something like AVIA's "100 TVL resolution".


Open Blanking all the way


Make sure to set your static convergence for all 3 guns to 0/0


Turn your contrast way down (to 3 or4)


Open both Horiz & Vert amplitude all the way


Start to increase Brightness until raster lights up. (for my XG that's up around 80 or 90)


Note!!! As you increase Brightness make sure the raster is not hanging off one side of the tube face, keep raster on the tube face!...you can always decrease Amplitude settings until your close to center, then increase Amplitude as you get closer to center settings. Increasing Amplitude increases raster size and makes it easier to center.


Center Rasters.


Bring Amplitude settings back to your normal positions.



Do not touch Static Convergenc, leave it at 0/0 and put up AVIA's "crosshair" pattern...if mechanical Convergence is good your horizonal convergence should be very close as is. (the vertical lines)

The object here is to keep the Static Convergence settings to within +/-5.


Use Vertical Raster Centering to bring horizonal crosshair line into convergence.


I also use one or two clicks of Horizonal Raster Centering if needed rather than Static Convergence.

 

[KennyG]

Oh, P.S. these pj's normally have high vertical Keystone settings...mine is up around 80.

Is your xg ceiling mounted, and if so, where is the top of your screen in relationship to the top of the ceiling?

 

[krustyone]

KennyG, thanks for the info, I guess I meant to

say horizontal keystone. The left side of the

image is considerably taller than the right

side. I was taking measurements last night and

I think the projector is not centered left to

right with the screen. It seems to be shifted

to the right a few inches, although It's hard

to figure out exactly how much it is off. I am

measuring diagonally from the screen corners

to the center of the green lens, it seems to be

about an inch difference. I wouldn't think that

this would cause such a drastic left to right

keystone difference. ??? Anyway, Thanks again.

Jon.