CurtPalme.com Home Theater Forum

[alb_qwerti]

Hi all,

I'm trying to set up my "new" Barco Reality 909 after the 1209s died because of a shorted green tube.

I'm setting up with 1600x1200 definition that was perfect for the 1209s
Even with 99% horizontal screen size I can't make the image large enough to cover the screen width of 2,20m (87").
The projector distance is correct, maybe some inch greater for testing this issue.
Using a lower resolution of 1600x900 I can cover the total screen width at 60%.
It seems that the PJ was tuned for 16/9 aspect ratio.
Is it possible?
Maybe someone messed with the width coils ?

Other questions about the 909 layout, that seems a little different from the 909.
The service manual on the site reports only boards layout, not description, pictures or board locations.

Where are the width coils ?
The 17v on the SMPS should be really 17v or 17.5v ?
Is it mandatory to check with the test point and voltmetre or could you trust the voltages of the on screen menu?

Thanks,
Alberto

[Hulio]

Hi Alberto,

Stay away from the raster width coils. If you ran out of horizontal width, this is the proper adjustment:
- display video signal at the rezolution you will mostly watch
- put the horizontal width in geometry menu at 95 with the remote
- now adjust pot P700 (max. horizontal amplitude) on SMPS sub-board till you get the desired width on the screen
This will affect the 17v setting too, so you'll have to re-adjust:
- black probe on the chassis, red probe on J36 test point of SMPS and adjust pot P1 for a reading of 17,3v
Shouldn't be too far away from the voltage in the menu, but tweaking with a multimeter is always beter.
If you need more in depth tips, contact me at Stan.iulian@telenet.be

Cheers

[alb_qwerti]

Hi Hulio,

I don't have the layout of the 909 boards and they are a little different from those of the 1209s.

Are correctly marked the components?
I'm not sure where P70 is .

[Hulio]

Yes, you got it right. Is P700, not 70.

[alb_qwerti]

Great Hulio, problem solved !

But a new one is ready !
The blue Output Amplifier is bad.
The tube is luminous even without feeding an image and there are diagonal lines.
I swapped with the red one and the problem go to the red, so it should be the amplifier.
I don't think it is compatible with the 1209s one!
A tech note in the manual tell all the difference.
Could it be repaired?
Maybe one power transistor is failing?

Thanks!

[Hulio]

Hi Alberto,

Yes, the RGB end stage is bad, if the problem moved to red. And no, the ones used in 1209 will not work. You could inspect it with a magnifier for bad solder or bad components.
Should you won't be able to fix it, i can sale you a working one.
What's the history of the projector, you bought it broken ?

[alb_qwerti]

Hi members,

From the installation manual I can't understand exactly the point to misure the projector distance of BR 909.

Is it not from the same point as the other Barcos, the L shaped frame attachment ?

From lens calculation it should be closer to the screen than the BG 1209s.

Thanks.

[kal]

Doesn't matter as it's far from optimal, especially on every Barco I've ever owned. Here's the correct throw distance for any CRT projector, taken from the main site:

While following the manual for throw distance is always a good bet (and recommended for new users), to maximize tube life even further do the following steps:

- Put the projector on the cart or simply leave it on the floor so that you can move it.
- Display something that fills the screen entirely (like a grid test pattern).
- Using only the green (middle) tube, look into the tube and increase the image width on the tube face until it is around 1/8" to 1/4" from the edge of the white phosphor. Under no circumstances should you allow the image to go off of the white phosphor surface!
- Move the projector back and forth until the image fits your screen.
- THAT is the correct throw distance for optimal phosphor usage.

It'll usually be 5-8% closer than what the manual tell you because the manual throw instructions are conservative since they make you install blindly without even looking in the tubes at all.

Kal

[kal]

Doesn't matter as it's far from optimal, especially on every Barco I've ever owned. Here's the correct throw distance for any CRT projector, taken from the main site:

While following the manual for throw distance is always a good bet (and recommended for new users), to maximize tube life even further do the following steps:

- Put the projector on the cart or simply leave it on the floor so that you can move it.
- Display something that fills the screen entirely (like a grid test pattern).
- Using only the green (middle) tube, look into the tube and increase the image width on the tube face until it is around 1/8" to 1/4" from the edge of the white phosphor. Under no circumstances should you allow the image to go off of the white phosphor surface!
- Move the projector back and forth until the image fits your screen.
- THAT is the correct throw distance for optimal phosphor usage.

It'll usually be 5-8% closer than what the manual tell you because the manual throw instructions are conservative since they make you install blindly without even looking in the tubes at all.

Kal

[alb_qwerti]

Thank'you Kal !

I'll go this way.

[CasetheCorvetteman]