I have a Phillips Tv, 55 inch projection hdtv, approximately 5 years old, but with only about 3 years of use on it. A few weeks ago the picture began to lose its red color intermittently, now the picture has no red at all, but it does continue to flash red lines here and there. Any ideas?
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Re: no red in picture
It could be a dry solder joint on the base socket pcb. Try resoldering the base socket, and try for dry joints on the main board also. Check if the rgb voltages are steady on the crt driver transistor bases.
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It's going to be cheaper to buy a new TV. Once you get this problem solved, another one will pop up. The parts for a TV that's 5 years old are not going to be cheap. Most TV repair shops stop carrying parts after 4 years, & the manufacturer stops making them after 7-10 years. With a semi-major purchase like a TV, it's best to purchase an extended warranty. ipmart. com offers a cheap repair manual. You'll be suprised how expensive repair shops can be when it involves "out-of-warranty" work.
A few weeks ago my set started flashing to a black screen. Now a couple of weeks later, i have no picture, but the set turns on and i have sound. The standby light is flashing. I purchased the set in 2000 so it is seven years old. This is the first problem. Could it be all three of the bulbs?
Could it be all three of the bulbs?
as you say that sound is ok that means your power supply &high voltage section is ok.
please check chroma ic luminance section or system control section stand by ckt
If it is truly a 52 inch standard projection set (you have it listed under 32V420T which is not a projection TV) and your 3 colors (red, green and blue) are no longer lining up and are all curved on the sides, then it means that your convergence power supply has stopped working. Post the actual model and chassis number and a better description of the picture here and I will be able to assist you further.
Usually there is a capacitor in the pump up circuit and/or an IC in the vertical circuit that causes this problem.
Contact Panasonic at:
To find a servicer in your area. This will give you an idea of the cost of repair.
Hope this helps.
Its the BULB people! You need to change it every 3 to 5 years! I have had my sony 55" for 6 years... I had Best Buy come out 3 years ago, changed the bulb... it worked fine. Just started flasshing and shut its self off and back on again. Time for another bulb.
Your whole problem my freind is dryed up capacitors. You should go, if you have the technical ability to replace these capacitors, to http://servicemanuals.net, download the schematic diagram, and start replacing the waveshaper capacitors in the vertical drive circuit.