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since every display color monitors are only work with 3 primary color which are red, blue and yellow. You could also search it that by mixing these colors, you could get any color your want. Thats how color monitors work. Now in case of green color, it creates by mixing blue and yellow. When you are turning the screen adjustment screw, the red color plug will become lose, makes it appear green. I hope your got the reason.
You can try adjusting the Red color output. (Very touchy adjustment)
you take off the front cover/speaker cover, there should be a access panel. Behind
that, there should be a small square black box with 6 screws on it.
This is the focus block. (At least this is where most of them are
It sounds more like you may need less red in the mix. There is a screw for each color. R, G, and B. Do not
mess with the focus screws, just the ones labeled 'SCREEN.'
Go to an unused input where the screen should be dark. Barely turn the red down in a dark room so that the red spot is at the same level as the Blue and Green.
Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it. Very HIGH VOLTAGE. I found that out the hard way.
Do not turn any of these up too high or damage may occur and the TV may detect a short and shut off.
have found that if the three colors are adjusted in a dark room to
where the 3 color spots (R/G/B) are just barely visible on the screen
at equal levels, there is a pretty good color balance.
there should be 5 or 6 preset on the crt(tube) base 3 of them should adjust red /green blue in the white aera and the other 3 adjust re/ green /blue in the dark aera make these adjustment with the colour turned off.
Sad to say that this is most likley a low crt the blue gun as gone low.
First check what color of faint lines comes then reduce Screen Volts in TV of that CRT (tube) Take off lower front cover, speaker grille of TV, there you will see focus control block that has 6 control knobs, upper 3 knobs are focus adjustment of red-green-blue CRTs and lower 3 knobs are screen volt controls for red-green-blue CRTs. Turn screen volt control knob CCW to reduce screen volts of desired CRT. Put TV on any free AV input so screen will be dark enough to adjust screen volts. Thanks.
Take the front speaker grille off; it is stiff but will pull off. Take off the access panel underneath; four or five screws. Inside you will find a screen/focus block control assembly. Get a flashlight. Turn up the screen controls SLIGHTLY. for RED, GREEN AND BLUE. The best way to do this is to turn off the color first and make sure you end up with a good black and white pix ( not tinged green, red or blue) then turn the color back up in the menu.
Try opening up the front cover under the speaker outer cover, most speaker fronts should just pull off if you don't see any screws holding it secure near the side close to the front cover. Then there is about 4 or 5 screws that hold the front inner cover on. You are looking for a small black box with 6 adjusting screws . Three of these are for adjusting the focus and three are for adjusting the amount of current going to the CRT's. The markings are very small but you can try turning the Blue screw down and that will decrease the blue ( marked with a B). But if this just makes the other colors seem more powerful you may have a bad blue CRT. There is adjustments for three color CRT's ,Blue , Green and Red, try playing with the Blue and try to get it the way you think it should look but if the Blue just does not want to work right the Blue crt is probably gone.
They should be adjusted to set voltages. however it is best to shut the color level to the lowest setting then try t balance the screens to achieve the best black and white picture. then turn up your color level. Your brightness level should also be set to 50 % then when you adjust for the best B&W picture. You will have better color and brightness when you reset your color and brightness levels. Hope this helps.
sounds like bad CRT, some of these sonys have had defective CRT issues, usually all will come and go sooner or later (all 3 bad), you can pull the speaker grill off(either 2 1/4" screws on bottom or 6 1/4" on back sides) and pull off the Crt box cover (2'X3' piece) and lightly tap the CRT's with tv on, if they flare or get colored streaks in pix they are bad, CALL SONY 800 # and complain, also could adjust G2 (Screen control for color) for short patch. Will need new crts.