CurtPalme.com Home Theater Forum

[ronaldus]

Hi everybody,

I have calculated my throw distance and adjusted my projector with a 1920x1080 source (macbook pro) at 60 Hz refresh rate through a VGA cable and have then positionend and installed my screen such that the phosphor area is correctly used and the screen is filled.

No I have the new moome V3 ext and a blue ray player and as long I it outputs a 60 hz signal (or higher) then I can get the the screen filled. The internal pattern runs slightly of the screen but the video image fits exactly. To my great astonishment when I put in a PAL DVD instead of a blue ray then it starts outputting 50Hz and the image becomes smaller (at least 25 cm on both sides on a 2.4mtr screen with). I tried to reproduce this with my mac and its exactly the same.

1080p60Hz, 720P60hz or 720P120hz is fine but with 50 hz refresh i cannot increase the size enough to fill the screen.

I've tried long and short retrace.

Is this a normal feature?

I know that Oppo blu ray players can force the hdmi allways to 60Hz and that could be a solution.

The other blue ray player i brought back to the shop.

A remark about the moome. The video quality with dvi to hdmi adapter into the moome and then analog into the marquee was better then when i went directly from the mac with a VGA cable. This says something about the quality of the moome and of the analog output stage of the mac!

I would love to hear some answers about this problem.

Regars,

Ron

[dvh99]

50hz or not, a lower scanrate means a smaller picture on the marquee, this is normal.
you could adjust the width yokes on the hdm at the lowest scanrate you are watching and fill the screen while having it at a 100% width setting.

look at the manuals or at tims site on how to do this.

salut,

dennis

edit: DO NOT USE A METAL HEX TOOL

[dvh99]

you shouldn`t use the calculator btw.
use the max available amount of tube face (so the active image goes almost over the edge) and then position the projector to fill the screen.

yes the quality from the moome is excellent, better then vga to 5bnc.

do you use powerstrip ?

[ronaldus]

Hi every body,

Thanks for your answers.

I have off course first setup the image on the phosfor corectly and used the calculator for a rough approach and then projected this image on a temporary screen to find the exact disstance.

I have used the mac without any other software. I used some powerstrip like program but only to get 1920x1080 60hz out of the mac's VGA port.

Now i use a DVI to HDMI cable straight into the moome box.

I don't want to turn any yokes because the projector is working fine and the image looks clean. I'm afraid to introduce some oscillations or whatever.

I guess an Oppo player would do the trick. I don't know if a PS3 can do that as well ( I have young children and I'm sure one day or another they woud like to play games).

Before I put the beast on the ceiling. I have one more phenomena.

If I have not used the projector for lets say a few weeks then the image is electronicaly out of focus.

If i then go in the astig menu and adjust just one notch up and down the sharpness jumps back in place.

This feels like old capacitors that have to recharge?

the projector is from 1995 but with only 1000 hours of use

Some experience anyone?

Best regards,

Ron.

[CasetheCorvetteman]

No expert at all but i have seen a Marquee mods thread on here with a heap of info, seemed alot of it was replacing capacitors and changing a couple values here and there, so you may want to read that one and see what you find

[jtvedte]

Ron,

That sounds like the 'snap' issue. TB97-04.

http://www.curtpalme.com/docs/ElectrohomeMarqueeTechnicalBulletin_TB97-04.pdf

Check R35 on the CLM - proper value is 3300 ohm

[ronaldus]

Thanks everybody,

I'll try to change the resistor and keep you informed

[Gerbrand]

The problem here is that the porches for 50 Hz resolutions are too big. The only solution is to use a scalar (or HTPC)

Gerbrand