Question about RCA P46924 46" Rear Projection Television

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Rca p46813bl convergence problem bowed in the

Rca p46813bl convergence problem bowed in the middle,at top and bottom

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  • SD Tech
    SD Tech May 11, 2010

    OK, I know this set--it almost never has convergence problems except for one thing. What kind of skill do you have with checking something with a meter? With the set unplugged, remove back cover--there is a circuit board above the main boards; it is about 10 inches wide and 4 inches tall---on the far right side there are several diodes---two of them are larger then the others--what happens here is one of the two diodes shorts and the convergence will be out the window---the diodes can be tested and better not read like a fuse--IF EITHER READS SHORTED--You just found your problem---part will have a location number marked under it on top of the board--5.00 dollar part. You have a multimeter which checks voltage or resistance? LET ME KNOW IF I CAN ASSIST YOU IN ANY WAY--this is one of the few problems this set ever had---much better set then the RCA sets made after it. SD TECH

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  • RCA Master
  • 14,553 Answers

OK., I know this set very well. It almost never has a convergence problem.

With the set unplugged, remove the back cover--there is a small circuit board mounted ABOVE the main boards--it is about 10 inches wide and 4 inches tall---On the far right side of it are several DIODES---two are much larger then the rest--what usually happens is one of the large diodes is shorted--5 dollar part---the board only has a few plugs and 4 screws that hold it in---easy to remove--check all the diodes(the two large ones first)

If either of the large diodes read like a fuse you FOUND YOUR TROUBLE.

LET me know if you need ANY help or Advice--I am here to help people---I have seen several sets identical to yours with the problem you describe.

Regards, SD TECH

Posted on Oct 07, 2009

  • cms071959 Sep 05, 2010

    I have a set that seems to have the same problem. Both of those diodes read good and appear to have been replaced already. Is there another part I should be looking at?

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I have Rca 52 inch that when I turned it on it was bowed at the top and the bottom, the images are double and the color is off.


sems like to me you have a convergences problem chedk conveg board and convergence chips and risistor or try replacing it. or try auto convergence. useally when when they are bowed at the top and bottom its the conver board..i hope this will help

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Tip

Good day!!!I i had problems with the fl 231 fuse on my RCA D52W23 proj.tv....i...


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
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7 RESOLDER FLYBACK CONNECTIONS simply heat up and add a little solder
8 reassemble set. make sure you examine the set for loose connections.
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1 Answer

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1 Answer

Bowed at top and bottom


No amount of cleaning is going to fix this problem, Go to menu look for setup see if you have convergences listed on menu if so try auto converge. If convergence is not on menu then you have a open fuse next flyback transfomer FL231 middle fuse.

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1 Answer

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Convergence ICs are faulty what is your model number? I can post which ICs you need and where you can get replacements that come with free instalation instructions so you can do the repair yourself

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