Hey i'm the girl determined to fix her hd52w59 hdtv. you had suggested to check the convergence power supply fuse. i was able to locate the fuse but am not sure how to go about checking it. can you explain how to check this fuse link? i'm familiar with checking a glass fuse but not so sure on this fuse link. i appreciate the help, thanks.
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Re: convergence power supply fuse
The fusable link... can be check with continutiy.. or a ohm meter......u need a meter that can do this when you put a meter across it it will read o ohms if good and infinate if bad some meter beep when it has near zero ohms meaning good... if you have any question. i can be reached at willie AT fordtv.com.... from your desciption it does sound like the fuse... However when you replace the fuse you have to make other repairs or it will fail again...falty solder connections is what cause this
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The fuse for the convergance power supply most likly is not your problem, go to the board below it, the deflection board and neer the flyback you will find three small fuses the one in the center is the most common problem with convergance and this also can be cused by the pins for the flyback comming unsoldered
ok first lets determine if the fuse is the poblem. do you have convergence option in the setup in customer menu. if you do then it will not be the fuse. if you have that option go into blue and red convergence. when you arrow over left or right up and down do the cross hairs move if they dont then it will be the power board(convergence)
yes, thats the replacement fuse for your set. However unless you have replaced the convergence power supply also chances are the fuse will blow again, as the power supply shorting is what causes the convergence to get out of alignment and it will then blow FL231 thereby removing the convergence option from the menu.
You dont want to leave that fuse jumped, as it blows when there is a problem with the convergence power supply, and if the power supplt surges again with that fuse jumped you will destroy the convergence power supply and the deflection board and the cost would be in excess of 500 for those two boards.
This is an indication that the convergence amps are drawing too much current which has an effect on the power supply and thus killing your sound by removing or lowering the voltage supplied to that stage, finally this results in the blowing of the fuse. I would suggest that you change the convergence amplifiers and the biasing resistors (All of them) and then see if this corrects your problem (I believe it will). Also get a schematic of the TV and try to find out how the power supply relates the sound module and the convergence module, they might share a common power bus, or the voltage regulator for the sound also feeds the convergence board.
Before you go and buy parts it might be worth your time to check the convergence power supply fuse. It's located in the back of the TV just to the right of a large black component with 2 red wires coming off of the top. This is the flyback transformer. Just to the right of the flyback you should see three fuseable links that look like chicklet's gum. The one that may have fried is the one in the middle, it's a 400mA 125V fuseable link. Hopefully thats all your problem is.