Question about Panasonic TH-42PWD6UY 42 in. HD-Ready Plasma Television
When ever i turn on the tv it turns on but goes off after about 5 minutes.when i try to turn it on again it repeats thesame process.pls can you tell me what to check to effect the repair?i am a technician. i checked the board and seem not to see anythign wrong.i have done some repairs on some projection tvs through a service like this and it has worked.i believe your information could also be of help.
I looked for that model but it isent in my data banks?? You should try to get a service schematic on the set first. Next look in the power supply and find the power supply main regulator IC. Hook up a meter to the output pin and turn the set on. If the voltage is slightly exceding the value of the IC wait and see what happens . Now right before the set shuts down, does the voltage swing high?? If it does its the IC. It should be a 125 to a 135 volt regulator and if it goes higher then 130 to 140 its bad as I said. If this voltage dosent change then the problem is in the High voltage section. Find the sweep Ic and locate the x-ray protection pin. Monitor the voltage on that and see if the voltage swings high when the set shuts down. I it does your gonna need to check out parts in the horizontal sweep circuit and if you got a scope use it. But remeber always use an isolation transformer when trouble shooting these sets or the meter or scope could blow out the power supply . Good Luck and Be carefull
Posted on Jun 05, 2006
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Posted on Jan 02, 2017
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