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thfixer Guest
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Posted: Tue Jun 16, 2009 10:14 pm Post subject: no color in a vestel tv |
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Hello very one i have tv ,i think it is vestel, having processor st 92195c3b1/oEo+stv2247h+24c08a.there is no color ,sometimes it is color ,sometimes not.any one to help me with this ,thanks in advance. |
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torbjorn
Joined: 07 Jun 2007 Posts: 370 Location: Sweden
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Posted: Wed Jun 17, 2009 9:42 am Post subject: |
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Do you have the same problem regardless of if the tv is receiving a RF signal or if you supply a composite or Y/C signal to the scart connector?
Check with a scope that the video signal at the input to the PAL decoder is in good order - correct amplitude of the color burst, no deformation of the burst or sync pulse etc.
If there is some switching circuitry for component type (Y/C or S-VHS) video signal, make sure that you have chroma signal at the right points after the switches.
Also, try alignment of the subcarrier oscillator according to the tv's service manual. |
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thefixer Guest
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Posted: Wed Jun 17, 2009 12:39 pm Post subject: no color in a vestel tv |
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I replaced stv2247h with stv 2246h and quartz ,so the color is stable: tv is ok now. |
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