I am looking for a solution or circuit diagrams for my Phillips 46pp8621/79 TV.
I currently believe there isn't any HV power coming out of the power supply or there is a short on the driver board bringing the power supply down. I haven't done much testing as yet as it is hard without knowing exactly what voltages I am looking for and where.
Would anybody have the diagrams available to download??
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Re: Power supply problem with Phillips 46pp8621/79
Your chassis is the DPTV 325 you can get the factory training manual for your set emailed to you at the following link. It cost 12.99 but comes with unlimited tech support if you need it. The manual is listed as DTV300 series training manual its has the trouble shooting proceedures and diagrams that you would need. heres the link. http://servicemanuals.vstore.ca/
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This Seems to be a Power Supply Boards.Phillips TV's are Popular for their Power Supply problems.
You need to Open the TV. Make sure it would be
Unplugged. You need to Take all the Precautions. Locate the Power Supply
Board. Remove the Connectors and Pull out the Board. Once you Pull out
the Board, with the Help of Magnifying Glass, locate Cold Solder Joint.
If Everything is OK, then you would Locate Bulged / Leaked / Swelled
Caps. They would have Ammonia kind of Odor. You need to De-Solder them.
You could take the same to Radio Shack / Fry's / Order Online. Once you
get the New Caps, Solder them and it is all set.You also need to Check
Fuses around that.
If the Problem Still Persists, get back to me
with Make and Model we would Troubleshoot other Components.
The timer light blinks representing the fault on the tv. If the tv blinks in an orderly fashion then the number of blinks before pausing is used to indicate the fault. This can only be determined by looking at the service manual for that set. If the blinking is continuous without pauses after a number of blinks, then it indicates there is a problem and the first place to look would be in the power supply. Either the power supply isnt supplying power to the Line output transformer i.e an open circuit or short circuit..OR the line output circuit has a short. Without a diagram i cannot guide you which components to check..but..swollen topped capacitors in the power supply are a give away :)
Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. I can't say it's 100% the problem because I can't actually look at the tv over the internet. If by chance the TV is still under warranty, go that route. If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you the flashing red light codes, circuit diagrams, test points, and part# lists. Usually, cost under $20.
The most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. I can't say it's 100% the problem because I can't actually look at the tv over the internet. If the TV is still under warranty, go that route. If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
when I turn off and then Turn on after 10 minutes the TV notwork(by using remote or touch button). I try to disconnect power supply andthen reconnect and waiting a couple of minutes and turn on but no work (nosound and black desktop) .I repeat this procedure many times so some timework and sometimes not work. please help me to solve this problem
This problem is linked to a power supply issue. The SSB is part of the power supply chain and will cause system failure if the board is defective. I have seen to many of these type of modular power supply boards fail. The shutdown circuit is detecting excessive voltage, and in the process of turning off the set it may have blown something else. I am begining to suspect a design flaw, which happens from time to time. I would suggest having a qualified TV repair person take a look at the TV and work on it.
I wonder if the coil was on the cord for the power or in the tv circuit board. I would definally suggest you replace the part with the correct part as I'm certain the engineer that designed the set wouldn't have designed it with a coil if it wasn't needed. I do have lots of used parts from junk sets if I knew what yours was exactally, I would be happy to send you one for the price of the freight. Let me know if I can help.
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