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My TV is philips model 29gx1890,after i power on picture is very Blurred as in out of focus the after a while about 5 to 10 mins. picture back to normal.I checked the circuit board for a dried capacitor in the power supply circuit but
all capacitors are ok.Is it a problem w/ CRT or Flyback?
Appreciate your help,I,ve been troubleshooting this tv for
2weeks now.Thank you.
Well you did start out good, thats cool, now we have to define focus, Is ir blurry around the edges as well as the whole Picture? If it is, it could be the picture tube, A bad solder connection on the tube socket, and yes it could also be the flyback transformer.
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Your television have problem in focus appearance.The picture have out of focus that why the picture is blurred.The problem is in the CRT socket of you TV it is connected to the tube,the white crt socket with 9 terminal.So you need to replace the CRT socket o make the picture good.It can be replace by using soldering iron and soldering pump.So you better call a authorized repair technician to do the repair.
guessing this is a rear projection tv. You did not provide a model number. Check the CRT fluid to be sure it is clear and not cloudy. Since you mentioned the problem was gradual over time, I'm guessing it is the fluid. This would be more obvious if you were seeing like a frosted look to the picture or dark areas and bright areas, which are caused as the fluid clouds up.
Your alternative is to try adjusting the focus of each bulb on the focus block of the tv. I think with an older Philips the focus block is in the back of the tv.
Have you try adjusting your focus/screen drive controls to Tube R/G/B you have a focus/screen drive control block to adjust each Tube 3 controls ontop 3under them top ones are for Focus bottom is for screen drive.Red/Green/Blue Tubes.You might need to replace convergence IC, what is your Model number printed on back of TV?
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