CurtPalme.com Home Theater Forum

[radar]

In the setup manual, in the geometry setup, it says to move c linearity up/down left/right to get the size of the boxes (in the crosshatch pattern) to be equal on the left and right side of the screen. It also states that the centerline should not move. Well.... it does! Once I've done matching the boxes, the center has moved up and right about 2 inches. This is annoying as I don't know if I should move the pj or realign magnetics to compensate. Is this normal or is there a problem with the machine? Will any of Draganm mods fix this?

Thanks,

Kevin.

[Nashou66]

It means as you adjust it NOT to move it. If it moves it means you are using too much adjustment. I would initialize the set. then look and see if the cross hatch pattern is level. if not then you'll have to level that deflection yoke. look on Tims site for help on how its done. Also after you initialize put up the cross hatch and
ramp the focus up and down, do your lines move from their original location? That is do they move side to side? I use a piece of blue painters tape that i line up with a vertical line for each color and ramp the focus, if any of the lines move from the edge of the tape those CPC and focus magnets need to be worked on. you should be able to ramp the focus and not have the lines move too much( no more than 3-6 mm). This could be why your grids are not as focused for the green and blue or you need to go into the service menu and focus them there.

Athanasios

[radar]

Thanks Athanasios,

I'm pretty sure the magnetics are fine... last time (6 months ago) when I did a reinitialisation, ramping focus up and down on each tube produced only a minor movement within limits (3-6mm) on the crosshatch.

I've had to redo the alignment due to my other issue (Automatic reinitilization) which may or may not have gone away (don't know yet... it hasn't auto reinitialized after about 2 hours so far). I've sensibly saved the settings to a PC once I'd done a rough alignment.

The c-linearity just puzzles me though (cause I think it happened last time I had to re-do alignment as well). I only have to move the c-linearity a few clicks to see the centerline move off my centermark (essentially painters tape with a + drawn on it) on the screen. Once I have it right, (but the centerline off mark), I just used the PIC control to bring the image back to the center... cheating I know!

Thanks,

Kevin.

[Nashou66]

After initialization what are the values for the C and S linearity, they should be at 50. I have found that some settings do not get "zeroed" after an initialization .
check that and set to zero after doing the initialization , then start your mechanical set up, you might have to adjust the tilt of the PJ now to get the center line back to centre of the screen.

Athanasiois

[draganm]

[Nashou66]

I think it has more to do with the signals being sent from the CLM/DPB to the various boards, so it could be on either. More likely a bad chip or resistor somewhere and this is where a scope is needed to test the waveforms. this i a Job left for Curt to diagnose unless you can swap the boards into a know working marquee and diagnose the problematic board. But once the issue is solved then the upgrade of the caps should be done as old caps may have over workd other components that then failed.

Athanasios

[tse]

In an ideal world the center would not move (alternate view: the edges would not move) when the "C" and "S" linearity is adjusted. The Marquee horizontal linearities definately do not work perfectly. The vertical ones are much more as you would want. If you want a perfect setup you will get the linearity perfect then set the position of the focus magnets to recenter. Ok. Using a little of the position adjustment in the convergence menu is not all that terrible of a thing.

Scott

[radar]

Thanks Scott! It puts my mind at ease now!

Kevin.