Question about Mitsubishi CS-36609 36" TV

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Single Horizontal line

Good sound, with a single horizontal line. Looking for vertical deflection information.

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The vertical IC has failed. Open up the back and look for a small flat IC attached to a heatsink. It should have about 11 pins or so and be marled LA3847 or something similar. First try resoldering the pins as it is common for the connections here to go bad. If that fails to resolve the problem, replace the IC.

Keep us posted.
Dan

Posted on Aug 18, 2008

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The image on a CRT TV is produced by a beam of electrons which is controlled by a magnetic field to move the beam top to bottom and left to right. A single line suggests that the vertical deflection is working but not the horizontal deflection (left to right). There are a number of components associated with this and requires a competent TV repair engineer to fix. Better to to buy a new TV!

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I think you are describing 'no vertical deflection.' If all you have on the screen is a single horizontal line, the vertical deflection circuit (or IC) has died. Unless you have service documentation on hand, I can't give a part number to replace but this is typically not an expensive failure and if the set was OK before, it is worth having repaired.

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JVC 27" CRT TV AV-27BP3 display shows single horizontal line


I have a similar problem on my CRT computer monitor (AcerView 76c). It is an old screen and I think it is just at the end of its life, much like your TV. Having some background in physics, I would be pretty sure that the problem is with the cathode ray tube's vertical deflection system. The horizontal deflection electrodes are working while the vertical one is not. This results in a display of a single horizontal line (or in my case, a few superimposed) in the centre of the screen. Where both X and Y (horizontal and vertical) deflectors fail then the electron gun firing would result in a single bright spot in the dead-centre of the screen.

So really, we have no choice but to move on and buy a new set as repair is probably just as, if not more, expensive than replacement with a new device. Seeing as your post was in 2007, I hope you managed to solve the problem.

Best wishes,
SZ (Sydney, AUS)

Dec 24, 2007 | Televison & Video

1 Answer

TV - only single, linear image with sound


vertical line on the screen is due to problem in horizontal deflection coil circuit

plz check

  • connector loose which is going to deflection coil mounted on crt.
  • loose contact or print break from flyback to def.coil.
  • capacitor defective going to deflection circuit.
  • if you are not tech person call tech. to fix it
  • it is not a major problem & can be fixed at your home.
  • hope this will help.
  • good luck.

Oct 17, 2007 | Televison & Video

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