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thefixer
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 Posted: Sat Jul 11, 2009 8:34 pm Post subject: horizontal problem in Vestel tv 11ak30 |
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| i have vestel tv chasis 11ak30 ,it has processor st92195c3b1,and stv2246h .The problem is no hOriz.signal in flyback even though i ,switch it on by using remote ,and led is green .Bu808df is ok ,116 is ok.i replaced stv 2246h but in vain.what are other possibilties.... any one to guide me .thanks in advance. |
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rajeev4u
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| Posted: Fri Jul 31, 2009 8:20 am Post subject: Re: horizontal problem in Vestel tv 11ak30 |
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| thefixer wrote: | | i have vestel tv chasis 11ak30 ,it has processor st92195c3b1,and stv2246h .The problem is no hOriz.signal in flyback even though i ,switch it on by using remote ,and led is green .Bu808df is ok ,116 is ok.i replaced stv 2246h but in vain.what are other possibilties.... any one to guide me .thanks in advance. |
first check voltage on the base of horizontal driver transistor,it may be open try replacing ir, secondly check +110v on horizontal transitor.
then reply
rajeev kumar |
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thefixer
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| Posted: Sun Aug 02, 2009 1:13 pm Post subject: no h in vestel |
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| the voltage is normal in transistor collector that is 115 v . |
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jts1957
Joined: 24 Nov 2008
Posts: 2477
Location: Far, Far Away
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| Posted: Sun Aug 02, 2009 1:52 pm Post subject: |
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| Scope for Base drive. |
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thefixer
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| Posted: Tue Aug 04, 2009 9:28 am Post subject: no horiz. investel tv |
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110 v is normal .transistor bu 808 is ok.i scope signal is normal when disconnecting output of stv2246 h from the rest of horizontal part.but when scoping with thesource of horiz signal connected i can have 7.5 v *it is not normal* .FINALLY I FOUND THAT ONE OF CAPACITOR NEAR BU808 DFI IS OPEN *NOT SHORTED*0.0nf C619 250V 100 nf.now tv set is ok  |
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