I have a 4 1/2 yr old rear proj. TV that suddenly developed a "bowing" effect in the middle of the screen from both sides. It resembles a "bell curve" and doubles the text and images present. Unable to find any info on the web but suspect it's a board or circut gone bad. I hesistate to spend the $$$ on repairs but will if not too expensive. Amy assistance/advice is really appreciated.
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Re: panasonic PT 47WX51 TV troubleshooting
This bowing you say happens in the middle of the screen??? on the sides of the set are the lines all white on the test pattern or differant colors. If all differant colors then you have a convergence problem and unless your good with a scope it would be best to leave to a pro. Now you could simply replace the convergence Board but then you will have to adjust all the controls in the set. Now if they just separate a little and still white at the edges its a pincussion problem. good luck Dont forget to write back if you need more assistance or you get it fixed
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FL231. FUSE.... The RCA ITC222 chasis has a common problem. and it not all that difficult to repair. Does your rca projection tv have read blue and green shadows? Does it have bowing in affect on the top and bottom of picture? when you turn it on does some thin red green and blue line bow in from the top then go away. The main question to determine if you have the fl231 fuse problem is if you go into customer menu then setup do you have the "CONVERGENCE' option. If you do not. then i suspect you have this problem. In the manufactering of these sets Lead free solder is used. now there is great debate over the use of lead free. connection tend to be more brittle. cracks develop around the solder connections of the high voltage flyback transformer. this very small crack set up oscillations in the cuicit with a 400 milliamp fuse. THis fuse cant take it. When this fuse blows the processor then does not know its a projection tv with three projection tubes. it thinks its a crt tube tv. and crt tube tv dont need "convergence" so it removes the convergence from the set.
TO REPAIR... 1. Warning. this set can generate leathal dangerous voltages even unplug do not attempt if you have no experence with electronics. 2. Remove the back. there a number of torx 20 screws. 3. what you will see is a number of circit boards There will be one on the right and one on the left. the one on the right is the small signal board. the one on the left is called the power deflection board. it has a large black part with a big red or black wire coming from the top, this is the flyback.Next to the flyback on the right of it there will be three small rectangular componets tan or brown in color. these are fuses. the one in the middle is the fl231 fuse. 4. getting to this fuse can be difficult. these two cuicit boards sit on a tray that is removable. to remove this tray it is pulled out and up. BUt watch the wires.loosen the wire tyes. 5 when you get the tray up the bottom side of the board can be accessed you will now have to unsolder that fuse. one side of this fuse is under a plastic part of the tray. i have found the easest way is to cut away the plastic to get to it. if you dont want to do this you will have to remove the board. only remove half of the plastic brace 6. REPLACE FUSE RCA PART 259213 7 RESOLDER FLYBACK CONNECTIONS simply heat up and add a little solder 8 reassemble set. make sure you examine the set for loose connections. 9 and remember "BE Careful'
Your Projo is a complicated piece of equipment, involving 3 picture tubes (like 3 tv's), convergence failures are extremely common, I dont think $550 is totally unreasonable, but I dont think it is a power supply issue if it is just effecting 1 color, usually it would cost around $100 parts $300 labor to repair, might be a little high, I suppose they are also charging you for pickup and delivery, I hate taking sets into office as that sometimes jars stuff loose or cracks boards.
If you have an ESR meter check C509 on the D board or simply unsolder it and replace it - remember it is polorized so make sure you put the new one in the same direction that the old one comes out.. Then let me know...
If you're not comfortable with that, this is a common problem that causes dark screen and you can probably have a tech come to the home with his trusty ESR meter and check a few caps in that circuit..