Question about RCA R52WM24 52" HDTV Projection Television

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Location of convergence IC's in R52WM24

I have a convergence problem and replaced the fusible link F231 and the TV worked for a few days. Today, the fuse blew again and back to original problem (colors un-aligned and fish-bowl effect). Would like to replace the convergence ic's but cannot locate them inside the TV. Other posts say they are big (2 x 3") and mounted on back of heatsink. The only IC's on the heat sinks I can find are small (approx. 1 inch). Cannot locate any that start with STK either. Anyone know where the convergence ic's are located in this TV and/or if something else would cause the F231 to blow? Your assistance would be greatly appreciated.

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  • Babylooch Feb 04, 2008

    jamiets12,



    Once you take the cover off of the back of the TV, look on the bottom left side in the tray you will see a large black transformer (it has a big red wire coming out of it and is high voltage so be careful around it). Just to the right of it are 3 tiny red rectangles, those are the fusible links. The FL231 is in the center, and should read a rating on top of it for 400 ma. This post is what helped me: http://www.fixya.com/support/t329116-dou.... This post will also tell where I was able to buy the fusible links.



    But again, after I replaced it, TV worked for 2 days then the fuse blew again. So something is still causing the fuse to blow. Others say to replace the STK IC's (integrated curcuits for the convergence), but I cannot find where they are located.



    We went and bought a new TV (50" Plasma) and will use this one in the basement, if we find an affordable solution to fixing it.



    Good luck!

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Thank you very much this fixed my problem

Posted on Jul 19, 2009

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The reason these blow is bad connections of flyback. consult tips and trick section "the fl231 problem"

Posted on Oct 03, 2008

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I have the same problem where is the fusible link i replace 2 boards and a connector (t.v. repair man can and diagnoised the problem but did not fix it)

Posted on Feb 02, 2008

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My screen shows 3 colors what do i do?


you haveing convergence issues. first question. in your customer menu under setup. do you have the conergence option if you dont i suspect the f231 fuse problem.. read this... http://www.fixya.com/support/r1062030-fl231_problem_convergence_not_in if this dont apply you may have to replace some faulty components in the convergence curcitry. let me know how it goes

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THe rca itc222 chasis has No convergence ics it uses a series of transistors to do the same. YOU replaced the Fl231 fuse and it blew. Did you resolder flyback connections. this is why the fuses blow. check out the article under the tips and tricks section written by me willtab ... see if this helps if not let me know .. i see alot of these at the shop ( i got one right now in front of me with the FL231 probelem LOL) if can let me know i give you help

Sep 15, 2008 | RCA R52WM24 52" HDTV Projection Television

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You most likely need a new convergence power supply board if fl231 keeps blowing thats the most likely cause, also check for shorthed capacitor cp231. If you need a link to get a replacement convergence power supply board, let me know I know where you can get them.

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sounds like you have more problems than just the fuse.. did you resolder the connection when you replaced the fuse. this is what causes that to happen.. fuses blown for a reason. ussally something is shorted. that particular fuse blows because it is a very small fuse and doesent take spikes in power to well. so when a intermittant connection begins to cause ossillations it shakes that poor fuse. it however sounds like you have more than that. does the led on the front flash when it shuts down.

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If the convergence option is not on the menu anylonger. thats another issue all together. That is usually a fusible link and capacitor on the deflection board that will cause that to happen. The convergence ICs will also need replacing as the link and capacitor will most certainly take out the convergence ICs as well. You will need a service manual on this issue. Let me know and I will post a link where you can get one along with some free support to help you with it.

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the rca itc222 chasis uses no stk the convergence is controled with transistors... the convergence amp board is located above the main signal board(green board)... it can be identified as the one with several heat sink fins on it. FL231 is related to convergence.. there has been a problem with this fuse when it blows the processor doesnt know it is a projection set so it turns it into a regular tube tv. Here at the shop we have found number one reason this fuse blows is poor solder connection on the flyback. So replace the fuse and reflow the solder connection on the flyback and around that area also the horizontal transistor and then see if that doesnt fix the problem.. if you have an more trouble ..... willie@fordtv.com

Feb 29, 2008 | RCA R52WM24 52" HDTV Projection Television

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RCA tvs have to be diagnosed by the Chassis number. Please repost the chassis number and I may be able to help you out.

Feb 09, 2008 | RCA R52WM24 52" HDTV Projection Television

1 Answer

Fusible link keeps blowing out , shutting tv off


Arynsunn,

Thanks to you, I was able to find the solution to my problem.
Have you tried using the correct Fusible Link? I noticed in another post that you said you replaced it with a 500ma instead of the 400ma. I had the same original problem as you and found the exact fuseible links at www.mouser.com. Part# 576-3960400000 Littelfuse Fuses - A 125V UL TL LL .400A . They are only 55 cents plus shipping. I bought 5 for under $10 shipped. Only took 2 days to get them. My TV works like a charm now! I too thought I may need to replace the IC's but thankfully my TV is working fine. If you did need to replace them, where were they located? I couldn't find any stk IC's inside either and the IC's on the heat sinks are all small. Just trying to be proactive, in case I ever need to replace them.

Jan 05, 2008 | RCA R52WM24 52" HDTV Projection Television

1 Answer

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I had the same problem. Thanks to the many posts on this site I was able to deduct that it was the Fusible Link F231. (See other posts about convergence problems) Was able to purchase them at mouser.com. Part# 576-3960400000 Littelfuse Fuses - A 125V UL TL LL .400A . They are only 55 cents plus shipping. I bought 5 for under $10 shipped. Only took 2 days to get them. Replaced it (needs to be re-soldered to board) and TV works like a charm!! I couldn't believe it. What a lifesaver!! Now I'm set if the fuse goes again...
Good Luck!

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I have found that fusible link FL231 is the main cause of this problem. It's located by the high voltage transformer and looks like a square coil.
Check it with an ohm meter and if it checks bad, then, replace it and you should not have to realign the convergence.
Any questions or comments, respond to this post and I will reply.

Jan 01, 2008 | RCA R52WM24 52" HDTV Projection Television

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