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Sansui 21 crt tv use ic 8823cpng 4pb8/tda7297 picture OK but no sound

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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Benimur

Louie Role

  • 6966 Answers

SOURCE: CRT TV vert section

Hi,

Vertical linearity is more of a DCV bias issue rather than feedback or AC coupling. Hence it would be more apt to suspect resistors rather than capacitors. Of course, it is also possible that the large IC that drives the Vertical output maybe at fault (least likely) but often would have trimpots for adjustment. Most current designs do away with trimpots and rely on self correcting (feedback loop) which is simply a resistor in the 100k range. In certain instances, it could be a thermistor or resistor or diode limiter attached to the yoke itself.

Best would be to use a service manual or at the very least a schematic diagram with voltage readings and compare actual on PCB against schematic.

If you could post back the make & model or preferably the chassis number of the TV, might be able to comment back known common vertical issues.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 06, 2008

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Anonymous

SOURCE: Half part is display

replace ic

Posted on Sep 29, 2008

Anonymous

  • 1 Answer

SOURCE: LG vertical failiure vertical line at the bottom of the crt

replace the vertical driver ic and the proccesor ic

Posted on Nov 25, 2008

B52Tony

Tony Nguyen

  • 96 Answers

SOURCE: picture is ok hissing sound in rf connectoin

Yes, change the tuner and make sure that all ground are well connected.

Posted on Jun 16, 2009

Anonymous

  • 1 Answer

SOURCE: sansui pure flat CRT model SAN 5452 need to

by myself trial and error

Posted on Jun 22, 2009

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