Question about RCA HD52W59 HDTV Projection Television
I am having the convergence issues thatmany have been having. I have replaced the FL231 fuse by soldering a 0.5 amp slow blow fuse into place. I have had trouble finding an exact replacement for it. I do this by soldering pigtails onto the fuse and then soldering it onto the board, This works for about 12 hours and then goes out again. Right before the fuse blows I lose the sound and the picture for about five seconds. When the picture comes back the convergence is gone. I don't believe it is the convergence board because I lose sound before the fuse blows. Could it be the power supply? Why is only the convergence fuse blowing if it is the power supply? What should I look at next?
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.
I hope this helps,
Posted on Jul 19, 2008
Did you resolder the flyback connections. The main reason the fl231 fuse blows is do to the brittle solder connections that come with LEAD free solder techniques used by manufactures. The Itc222 uses a series of convergence transistors not amplifers. The loss of sound is common before this fuse blows.
Posted on Nov 25, 2008
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