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My JVC CRT type tv picture looks dark even though brightness and contrast are at maximum (commercials look brighter).

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Have you set ECO mode off

Posted on Nov 11, 2008

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Hi,

Offhand depending on the age of the unit, it may need a small adjustment on the screen controls at the back of the TV. This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back if you are considering a DIY, how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 11, 2008

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Unplug the tv for sometime then readjust the settings again. and then try.

Posted on Nov 11, 2008

  • mmechanics Nov 11, 2008

    after unplugging the tv remove all the external connecting devices from the back of the tv such as dvd---vcd or any other device.then plug the tv power cord and then readjust the settings .

  • mmechanics Nov 11, 2008

    The screen phosphors will be worn out and the electron gun must shoot stronger to compensate. But when the electron gun is forced to operate at high intensities I think there will be more red bleeding, bleeding in general, convergence problems, etc. So I think when a set starts to get kinda dark it is already approaching death. :):(The cathode (the electron emitter) is probably the problem -there used to be rejuvinators that increased the voltage to the filament to keep the cathode hotter for it's remaining years - but that stuff when out with the B/W tvs - The phosphers can wear out - but more likely it is poor cathode emission or weak flyback transformer ( High Voltage) or atmospheric gasses leaking into the CRT that is the cause of the darkness and red fringes. - 
    when tubes ruled - 

    "filament activity" testing (lowering the temperature of the cathode about 10% and measuring the loss of emission) 

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The best contrast and brightness settings for a toshiba crt floor model tv,model 50A61


Televisions are unlike other consumer electronics products. Their setup and settings have a tremendous effect on how well they perform. The best TV on the market incorrectly setup will almost always look worse than a mediocre TV setup well.
Ideally, you'll get a setup disc to ensure the correct settings, but regardless, it's important to know what each setting actually does.
To get the ultimate performance out of your TV, a full calibration by an ISF Certified technician is your best option. Even if you go that route, it's good to know what the calibrator is adjusting. So here's a quick look at the basic settings every TV has, and what they do.
Please keep in mind, this is only a general guide in what each setting does, and rough idea how to set it. Correctly setting up a television is a completely different article.
Where to start
Nearly all modern TVs have picture modes. These are labeled things like Standard, Cinema, Vivid, and so on. Cinema or Movie is often the most accurate setting, with all the controls set to offer an image close to what a director intended them to look like. Most people aren't used to an accurate image like this, and to them the TV may appear reddish, soft, and possibly dim. Technically, it isn't. Other picture modes like Vivid or Dynamic are programmed to "pop" on a store sales floor with an overenhanced, blue image. Because most people don't change any of their TV's settings, this has resulted in most people thinking a TV should look blue.
The choice is yours, of course, but we here prefer an accurate image and suggest you at least try it for a few days. Once you get used to it, you'll never go back. Check out What's the best picture mode? for more info.
Regardless, all TVs need tweaking to look their best. Here's what the main controls do.
Backlight
Only LCDs have this control (though not all of them). This is a direct control of how bright the image is. Setting this lower will reduce eyestrain, and save a little on electricity. Before you adjust Contrast to make the image brighter, try here first. Check out LED LCD backlights explained for more on this.
Some plasmas have a control that drives the pixels harder, which in some ways acts similar to a backlight control. Samsung's name for this on their plasmas is Cell Light.
Contrast
Sometimes labeled "Picture." This control makes the image brighter...up to a point. Every television has a maximum light output. Once you reach this point, increasing the Contrast control further actually degrades the image. Correctly set, you would see a fluffy cloud in a bright sky. Set too high, you'd see a blotch of white instead. As mentioned above, try setting the overall light output of an LCD with the Backlight control first (if available). Then adjust the Contrast.
Brightness
This controls how dark the dark areas of the image are, again, to a point. Every TV has a minimum light output. Once you reach this point, decreasing the Brightness control starts removing "shadow detail." Correctly set, you'd see all the detail in a black leather jacket at night. Set too low, and it would be a black area on a black area, probably with a head sticking out of it. For more information on how the contrast, brightness and backlight settings interact, check out my article on contrast ratio.
Color
Can be thought of as color saturation. Setting this too high will make everything look cartoony. Setting it too low will make for an expensive black-and-white HDTV.
Tint
Rarely will you need to adjust tint, a vestigial control left over from the CRT "tube" TV days. It gives a green or magenta shade to the image.

Jun 23, 2016 | Toshiba Televison & Video

1 Answer

My cable and tv is but my screen is black and I can hear the sound of the shows and commercials... I just can't see it!


go to the menu and look for the brightness adjustment. most tv's have this control as the brighter the picture the more electricity is used (i.e.your electric bill). also check out contrast and other picture controls. hope this helps. good luck

Jan 22, 2013 | Televison & Video

1 Answer

Hi Guys, I have a JVC 32T55EKS TV & the picture is overly dark. When the picture goes through the set-top box the picture gets even darker. The brightness is turned up fully & I have accessed the...


U turn on the contrast level to the max,if still not watchable,tv cathoray tube is dying,radiaton is disappearing.Time to buy another tv.

Feb 14, 2011 | JVC AV-27230 27" TV

2 Answers

Picture djust


Put it in the custom mode.Put the contrast to the max.Put every things in middles may be colors for less.Now u have the desire ajustment u want?

Aug 19, 2009 | JVC AV-27530 27" TV

1 Answer

Brightness and color


It really depends on what YOUR eyes are pleased with - if 50 looks good to you, that's where it should be. It seems like you might be afraid of messing up something - don't worry, you can't hurt the TV by adjusting the customer controls :-) You might try a little experimenting - kicking them up to 75 might give you a brighter and more pleasing picture. I've been a TV technician for years, and I generally like the brightness and contrast up almost to the maximum (I like a bright picture as opposed to a "warm" one), with the color and hue adjusted for an accurate reproduction of facial tones. But the bottom line is what YOU want - feel free to experiment, you can't hurt anything as long as you don't start taking out screws :-)

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1 Answer

Picture getting dark


My jvc 27" tv was so dark I could hardly see any night scenes, even with the bright all the way on. If you push the sleep button, let go, then hold down the video and display (together), the service menu will come on. Scroll down to #7 (too dark) and adjust the brightness there. Works immediately. Good luck.

Nov 29, 2008 | JVC AV-27530 27" TV

2 Answers

Screen too dark even with all brightness settings set to max


The picture is very dark it is mostly due to 1 power supply output is low. 2 voltage on crt g2 pin is low. 3 video output supply is low. 4 some components in luminance section might be defective or loose. 5 finally crt getting weak is set is old. good luck

Sep 21, 2007 | JVC AV-27430 27" TV

2 Answers

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.

Aug 30, 2007 | Televison & Video

1 Answer

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.

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1 Answer

Screen went full bright one day.


Hello, please check the 10uf/200V capacitor around flyback transformer. Best regards, Arpi

Jul 17, 2007 | JVC AV-27230 27" TV

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