Question about JVC Televison & Video

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I have a 70 inch JVC Genessa with brightness issues. The picture clarity is good but too dark.

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  • JVC Master
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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
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Posted on Dec 28, 2016

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Posted on Jan 02, 2017

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MikeNJ1964
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SOURCE: brightness of picture

If you feel good about opening your set then you can try this: Look for the flyback (high voltage) transformer, with the thick red wire which goes to the top of the picture tube. There are 2 controls on the flyback transformer, focus (top) and screen (bottom)Turn the brightness and contrast all the way down and then increase the screen control until you see retrace lines, and then back it down until those lines just vanish. Return the brightness and contrast to normal and adjust the focus control, if necessary, for a nice sharp picture. Let me know if that brings your brightness back.

Posted on Aug 21, 2007

TVtechmaniac
  • 140 Answers

SOURCE: The picture on my JVC TV is too dark

On the inside of the TV, on the flyback transformer there should be two controls. Turn the one that says "screen" very slowly clockwise while looking at the pix. The pix should get brighter as you turn it up- if you go to far you will see lines in the pix or the TV may shutdown.

Posted on Aug 30, 2007

  • 1153 Answers

SOURCE: JVC AV 270305 Brightness not Bright enough.

Yes you could look for the capacitor that is leaky, probably in the 200v line, or you could just open back and turn up G2 screen control on the Flyback. You have Screen and Focus on this black transformer with a long anode lead going to the picture tube of set. Becareful, High Voltage!

Posted on Sep 08, 2007

  • 556 Answers

SOURCE: Picture goes dark

1 your problem is in video section 2 if it is ok then check power supply for any components defective.

Posted on Sep 16, 2007

dr reed
  • 379 Answers

SOURCE: JVC TV

u need to adjust contrst settings

Posted on Feb 21, 2008

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1 Answer

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Hello
Adjust the contrast to 55 to 70%; brightness to 45 to 55% and colour to your viewing taste. Now the brightness will be very low I thinks. Advance the brightness and contrast after setiing the colour to Zero. Adjust for a well defined B/W picture first. The advance the coulour. Take reference of the face colour of a news reader at studio. The picture will be perfect. OK.

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