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Old 01-10-2019, 10:13 PM
Jeff Jeff is offline
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Join Date: Oct 2015
Posts: 32
Quote:
Originally Posted by zeno View Post
Do you have a color picture that goes away to blank white when the color control is turned all the way down ?
Yes, actually. Only colors, no black and white information at all. If I put on a b/w show, nothing shows up. If I put on something with colors and b/w video, only the colors appear, and only when I crank the color control all the way up. So basically, all I see are highly saturated colors, and everything that should be b/w on the screen isn't even lit. I'm thinking it's because it's not getting the 2v peak to peak video signal it needs at test point 3, as of now it's only getting a 200mv peak to peak signal. Test point 3 comes after the first video amp, but I'm assuming the first video amp (Q200) should already be getting a 2v pp video signal out of pin 12 (I said pin 5 last time by accident) of the IF amp IC.(IC120) Also, contrast control does nothing, which makes sense because it is right on Q215, the fourth video amp.
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