Sansui TV with a white horizontal line problem


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Sansui TV with a white horizontal line problem

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sigujana
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Jan 30, 2008, 11:57 AM

Post #1 of 3 (3906 views)
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Sansui TV with a white horizontal line problem	Can't Post

I have bought a second hand Sansui sv2002 TV. When I switched "On". I t had a white horizontal line on the screen. I found D 452 short, R 451 blown and TDA 3653B IC blown too. After replacing all three the TV was working for almost three days, then after a horizontal line apeared again. I replaced the TDA 3653B and it was fine for few days again. What is cauasing this IC to keep on blowing?. Please help.
Sigujana

rrobor
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Jan 30, 2008, 12:17 PM

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Re: [sigujana] Sansui TV with a white horizontal line problem [In reply to]	Can't Post

There is an electrolytic that causes this fault, its the booster and is usually 100uF 35V, you must change that. From memory one leg goes to pin 6 and the other to a diode but I could be wrong. If you dont change that the chip will not balance and one output transistor inside the chip will try to create all the scan and will fail. Once the set heats up if the chip survived all will be OK, this is destruction on switch on.

sigujana
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Jan 30, 2008, 2:02 PM

Post #3 of 3 (3885 views)
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Re: [rrobor] Sansui TV with a white horizontal line problem [In reply to]	Can't Post

Thanks Rrobor I just replaced it ,I will wait and see whether it does not fail.

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