Question about JVC AV-27230 27" TV
I have a JVC AV27320 TV that is only few years old. The screen of the set becomes to too dark in recent week. The color is also turning poor, which I don't know if it's caused by lossing the brightness. I have adjusted the Brightness on front panel to max and even adjusted the Screen on the FBT, it didn't help much. Does anyone can help on this set or know where can I get a free diagram for the set. Thank you for your help.
Hi solution #2 was correct. the adjustment knobs r on what's called the "flyback" i adjusted the bottom knob and the difference was from "night to day" !!!
Posted on Feb 09, 2008
I think it may be a possibility of low heater voltage. The heaters are the filiments inside the picture tube that gives off the electron emissions that are guided through the tube by the grids and bounch on to the CRT face. If the emissions are low the picture will look all muddy and washed out with poor color. This could be a bad coil or resistor or even a leaky capacitor in the filiment circuit. Although Jomaru could be correct by saying the picture tube is bad also, but I have seen sets that had poor connections in the heater circuits that were condemded for bad CRTs as well. Like he said if you have no TV repair experience, play it safe and call in a tech to assist you in this repair, as there are no user replaceable parts inside this set. A tV set is no place to be experimenting inside if. Good Luck PS please do not forget to rate this thread
Posted on Oct 20, 2006
Thanks for your help. I was about to trash my TV and buy a new one. You saved me lots of money. I adjusted the brightness on the back and it's like having a new TV. Thanks again
Posted on Jan 01, 2008
Brightness on the JVC AV27320
by rtaylor013 ,Aug 07 '06
Pros: The brightness problem was easy to fix.
Cons: I shouldn't have had to adjust the television in the first place.
I was recently given a JVC AV27320 television by a neighbor that was moving he gave the television to me because it wasn't bright enough. So with a flashlight and a small Phillips screwdriver I adjusted the brightness with the master controls in the back of the set. On the back of the set; the right hand side you will find two vertical slots. The top one is for focus. The bottom one is for picture brightness. With the flashlight I looked into the slots located the place for the Phillips and adjusted the brightness. Simple I know but not all fixes are hard.
Posted on Dec 17, 2007
I was NOT electrocuted! I took the advice proffered by Dave Mil. IT WORKED!!!! Took about 30 seconds. I'm a 72 yr. old widder woman who's been suffering for over 3 years with this DARK pix. If there was a night scene in a good movie-I'd have to go to another tv. This condition was extant from the day of purchase! Many thanks to Dave & the TEAM for this great site!
Posted on Feb 21, 2008
If your tv is older than 5 years it qualifies for a possible bad picture tube but it can also have a regulation problem in the power supply making all the voltages supplies lower than normal,specially the volts supply to the horizontal output transistor,he energizes a transformer that produces the high voltage that lights up the picture tube.You can purchase a service manual at http://www.servicemanuals.net/ ,you can also check your local library,in big cities some libraries have squematics.If you need more information please let Us know.
Posted on Oct 12, 2006
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