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Click here and try to download the user manual to your Sansui TV, and refer it how to make a factory reset to your tV. If it do not help you, the main system memory IC might be faulty, and should be replaced.
fold back means u have to check power supply to v/ ic 25v. if it is ok,,, u have tochange all capacitors in vrtical section,, sometimes feed back resistors may be fauty,,check them also
This is called vertical collapse and the most common cause is a failure of the vertical IC. If you can update this with the model number, I should be able to provide the part numbers and costs for the parts required to fix this. Also, if you intend to repair this yourself, please indicate thtat as well. The parts will cost around $20 or so.
The short answer would be yes. A more detailed answer can follow if you can update this with the model number. If you are getting just a hum without any other sound, the problem may be a poor connection inside the set. It is possible that the audio amplifier IC has failed as well. You can narrow this down a bit by connecting the audio output form the back of the set to a receiver. If the sound from that is OK, then the problem is likely to be the audio amp. This Ic generally costs around $20 or so.
You have bad grounds on the vertical IC and bad cap at 35volts 100mf. Resolder the IC and replace the cap. Also there are two other caps you should look for...50volts 1mf, they need replaced too!
Your problem is not a vertical alighnment or size adjustment. No, Im sorry to say its the old vertical output IC and /or the small capacitors around the ic and in the vertical circuit. If you dont have the right tools, like a soldering iron a multimeter know how to read a schematic diagram, then you should seek out a repair person to assist you in this repair.
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