I had just finished adjusting my Trinitron with Artemio's 240p test suite, and as I was going to take one final look at how pretty the solid colored screens looked, there was a slight flash and suddenly everything had a slight greenish tint to it. Thinking maybe I had hit something weird in the service menu I saved the color options I had been knowingly changing (R/G/BDRV, R/G/BCUT) and unplugged it for 30 minutes or so. Didn't make a difference. I can adjust the tint to compensate somewhat, but it makes reds look weird and the SMPTE test pattern no longer show solid stripes.
Did I witness a cathode blow, or maybe some other component? Is there any diagnostic I can check, like the menu that appears when you press a slightly different combination than the service menu's combo? Am I truly and royally boned?
EDIT: Looking around some more it seems it could also be a blown IC, resistor, or bad capacitor. Does that seem plausible? And can you check ICs with a multimeter or does it require something special?
Is my CRT dying (green tint)?
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bobrocks95
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Is my CRT dying (green tint)?
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bobrocks95
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Re: Is my CRT dying (green tint)?
Anyone? Nothing appears burnt out or damaged internally. Even if something like a capacitor was blown, with the way the TV is made it doesn't seem like I'd be able to safely remove any boards on my own...
I'm reading more in the service manual about sub-hue/brightness/contrast adjustments- can anyone tell me what the sub means exactly? I don't have an oscilloscope to make it an exact science but I figure I could tweak the settings around and see if they're helpful...
It's just such a slight green tint that I'm hopeful it's an easy fix and I'm just overlooking something.
I'm reading more in the service manual about sub-hue/brightness/contrast adjustments- can anyone tell me what the sub means exactly? I don't have an oscilloscope to make it an exact science but I figure I could tweak the settings around and see if they're helpful...
It's just such a slight green tint that I'm hopeful it's an easy fix and I'm just overlooking something.
PS1 Disc-Based Game ID BIOS patch for MemCard Pro and SD2PSX automatic VMC switching.
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22point8
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Re: Is my CRT dying (green tint)?
Sub brightness sets the mid point for the brightness control. I think sub phase is something you need an oscilloscope for, because it always mentions in service manuals that you put up a EBU or SMPTE bar, attach oscilloscope to a pin on the board and adjust so the waveform looks a certain way.
Put up a white screen, is the green still as bad, or are darker shades more green? If darker shades are green adjust green bias down or red.blue bias up. If whites are too green adjust green gain down or red.blue gain up. You would have to readjust the brightness and contrast afterwards as bias is r/g/b brightness and gain is r/g/b contrast.
Put up a white screen, is the green still as bad, or are darker shades more green? If darker shades are green adjust green bias down or red.blue bias up. If whites are too green adjust green gain down or red.blue gain up. You would have to readjust the brightness and contrast afterwards as bias is r/g/b brightness and gain is r/g/b contrast.