Question about Panasonic CT-36D32 36" TV

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Picture Color is bad. There is a circular pattern of colors on my screen. Light colored in the center then a ring of red then a ring of yellow. Help!

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Sounds like the deguassing cicuit has failed . This aligns the purity of your colors .Most of the time it is a simple loose connection on the themistor or the degaussing input cord to the board . Or the thermistor is bad . The tv was not dropped ? If it was this could have loosened the shadow mask in the picture , then the only way to repair is the replace the picture tube . Good luck

Posted on Mar 04, 2008

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Why do i have a green screen after i turn the screen adjustment screw?


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.
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These procedures are from the owners manual, go into menu and then picture quality and then: Convergence The Convergence feature lets you adjust the TV’s three tubes. When the TV tubes’ images are precisely aligned, they create the color images you see on the screen. Over time, the picture can drift out of alignment (this is normal). If your picture seems fuzzy or has a yellow tint, using Convergence could correct this misalignment. Only one convergence is needed for all inputs, regardless of the signal format. Note: Make sure the TV has been on for at least 30 minutes (TV needs to warm up for best results) before starting Auto Converge or Red/Blue Centering. When you select the Convergence feature, a submenu appears with three options: Auto Converge Automatically aligns the projection lenses to self-correct color images. You’ll see flashing squares of color dance across the screen (this is normal). Note: After performing auto convergence, use the Blue Centering and Red Centering menus to fine tune convergence in the center of the screen, if necessary. Blue Centering Aligns the blue and green images to fine-tune the picture. Red Centering Aligns the red and green images to fine-tune the picture. Note: The ability to change channels is disabled when adjusting the convergence options. The TV must be tuned to a usable signal to converge the picture.

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I don't have any red tones. Grass looks yellow,


At its worse you have a color gun in the picture that is bad. On a positive note you may have a bad ground on the crt board. Or a bad color output transistor,or bad transistor ground on the crt board or even a bad resistor, or resistor ground. Have someone inspect the CRT board. Hope this will clue you in to finding a solution!

Apr 19, 2010 | Standard (CRT) Televisions

2 Answers

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Turn down your color and see if the screen has a normal black & white screen. If it doesn't then the CRT is bad (picture tube). If it is black & White then you have a either lost your red or blue.That problem will be in your video driver circuit of which a service center can handle.

Feb 18, 2008 | RCA 20V500T 20" TV

1 Answer

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1 Answer

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Definitely bad picture tube==not worth fixing......T.

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3 Answers

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have JVC AV-32F702 TV. It's picture color is very red. unable to adjust colors through menu. Channel numbers are also in red now instead of normal green. any suggestion? please check red color cathode circuit 1 check red output from ic to red cathode ckt 2 check voltage on r output ckt& ic or tr. 3 check loose contact in red cathode ckt 4 check crt base for loose. 5 loose connector 6 chroma ic thanks

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1 Answer

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Sounds like a CRT (picture tube) that did suffer a bit of a blow to it. The rings are caused by the thin sheet of steel inside of the CRT called a shadow mask being warped. The other cause for this is the internal degauser in the TV comming on and staying on too long causing damage to the CRT. Either way the CRT is over $400 plus you will need to find out what caused the issue and repair that first.

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sounds like you have a deguassing problem with your TV .. have the repair person bring out a deguassing coil and see if thsat helps.. This will only be a temp repair as you will have to have the problem that caused this to be fixed. good Luck

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