Discussion in 'Projectors, Screens & Video Processors' started by larsan, Feb 17, 2003.
I was wondering how to correctly set the G2 on my 1209/2.
The G2 setting on Most CRT's in home cinema is a once in a few years setting and does not require constant tweeking.
Each projector has its own way of adjusting and the below is specific to the Barco Graphics and Data 1209 which did not have voltage indicating LEDs to help identify the correct setting.
Feed a colour bar signal into the composite video port.
Go to the random access section of the barco menu and select colour balance. go to the black balance (could be called cut off) and make sure the red,blue and if the option is give that green is set to 50%.
Set the contast and the colour 0%. Set Brightness to 50%
Short circuit the two small pins that you can see on the black end stage of the tube, next to the phono plug that inputs the video signal. (this will switch off the automatic black level ABL)
Black the room out completely. cover the tubes that you are not adjusting and turn the respective G2 pot so that you can just see an image apear on screen. (repeat for the other colours)
The G2 pots are the coloured chappies on the board on the far right of the projector when table mounted and viewed from behing.
A few warnings here. There are some leathal voltages on that board. the heat sinks are live to the mains and very close to those pots are some components that if you short them out will blow the projector big time. I suggest you only use a plastic adjuster and if you are not sure then leave it alone.
set your brightness, colour and contast back to normal and adjust the colour balance.
Oh! Nothing more challenging?
I think I will be able to sort it out though...
Thanks a bundle Roland!
I am wondering if this way of setting the G2 is the same with my Barco 1208/2
And what exactly is the G2 setting for? Blacklevel?
Adjustments on your 1208/2 will be the same, infact it is the same projector just with 8" tubes.
G2 is a voltage control that allows the number of electons to pass through the tube to make the phosphor glow. this it will effect the black level.
I did the adjustment and every thing worked out very well!
A couple of weeks ago I posted a thread,see "can't get higher resolution right", about the problems I hade to change my resolution. I still can't change the resolution. Somehow the projektor can just display the 1024x768 over RGBHV every other resolution is spinning or doesn't have a picture at all.
Do you have more Ideas what the problem could be?
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