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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John, my thoughts is something in the main power supply. I don't know what an opto chip is but I've heard of Optocupler IC's. May be a good idea to give a call to some local TV Repair Shops especially ones that work on Philip's and see if you can speak with a tech to see what their thoughts are on what the problem is and what a repair cost may be. The issue is one of hauling it to the TV shop or having them come out to you. Blessings, A/V Media Guy
Power supply (switched mode) is shutting down due to either a fault within the power supply itself, or a problem in the line stage (EHT) and the current protection circuit is shutting down to prevent further damage. Flyback diode often fails shutting the power supply down.
A circuit diagram is required in order to repair this.
HELLO MY FRIEND, THERE A FEW THINGS THAT YOU HAVE TO CHECK ON THE HORIZONTAL CKT(CIRCUIT) AND THE SECONDARY POWER SUPPLY, BUT IF YOU DON'T HAVE THE SKILLS TO DO THIS YOU'LL NEED TO CALL THE REPAIRMAN
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.
Hey im not one of the techy guys with tv's im a computer guy.
but i have that same pioneer set you have the 510-HD and i had a similar if not the same problem.
my ex-father in law is a tv repair guy he told me to resolder the power board connections that looked corroded. i did just that and problem solved. hope this helps you out
FYI make sure you use rosin core solder not acid core good luck
Check the standby power supplies, then the run supplies, then the
h-driver circuit, then the H.O.T and flyback circuit. And in general look for bad transistors, diodes,
capacitors, resistors, faulty solder connections and etc.
BE ADVICE!!! if you don't have any repair experience and electronics knowledge leave it. Take it to an experienced tech or a service shop.