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Tube TVs

tv brand philips model 21PT969 / 55

luis543
luis543
15
hace 5 años
hace 5 años
Hello, good morning colleagues, I hope God is well today, a philips brand tv model 21PT969 / 55 arrived. when the image is turned on, it is dark or opaque and when the contrast rises, the image turns red ... I would be grateful if you can give me your help, colleague ... thank you and may the Lord bless you
neg2013
neg2013
14.048
hace 5 años

Good afternoon, if you can upload a picture of the fault, but you should also report video voltages, such as cathode or gun voltage levels ... Screen voltage / cathode voltage 160 volts at Philips .. .

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luis543
luis543
15
hace 5 años

Hello friend, if I have 180S and in the cathodes I have in KB = 187.8V, KR = 1056V, KG = 0181.9V

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luis tartaglia
hace 5 años

KR = 1056V, KG = 0181.9V ??
Measure again

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luis543
luis543
15
hace 5 años

ok friend, I'll tell you later

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luis tartaglia
hace 5 años

Where is the contrast regulating?

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luis543
luis543
15
hace 5 años

of the flayback

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luis tartaglia
hace 5 años

That's why I asked you. That is not contrast. The regulator below is scrin. It's more bright and the top one is focus. Focus.
The scrin must be well calibrated.
Set it 0 counterclockwise. And you increase the antenna cable very, very slowly. And go when I get to give image. If it gives. You did not comment on the tensions. Make it measure again. SCRIN to 314v put it.
The contrast is only regulated from the user menu.
Do you see the characters (OSD)?

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luis543
luis543
15
hace 5 años

thank you very much friend

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Javier Chavez C
hace 5 años
hace 5 años
Regulate the SCREEN to an appropriate level. in the same way with the focus potentiometer (FOCUS) of the flyback, graduate until a good image quality is obtained. If the problem persists, check the good condition of the socket (molds or sulfates) at the FOCUS cable entry. Please upload an image that shows the defect. Well, it can also be problems in the VERTICAL stage.
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