Question about Sony KP-48S75 48" Rear Projection Television

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Red and green off

Just the red and green are off on left side about half way to the off i mean not centered and lines are wavy just on left side i have tried the conv. adjustment and i can see the lines move but not line up like they need to go over about an half inch more...anything i can do? thanks

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Hello nroxxhard,

It sounds like your convergence amplifiers are malfunctioning. These can be replaced, but I always like to troubleshoot to figure out why they went bad in the first place. That is why my suggestion to you would be to have the TV checked by a qualified TV technician. There are many sites that tell you how to replace the amplifiers yourself, however it has been my experience, in having to do re-work on sets people have tried to replace parts themselves without proper knowledge. So if you want to do this yourself: (I suggest that you not), locate the two STK circuit modules (black six sided IC module) connected to a Heat Sink, then unscrew the screws holding the modules to the heat sink. Using your schematic diagram locate and note all of the biasing resistors connected to the convergence amplifiers, you will need to replace these. Once that is done, de-solder the convergence amplifiers and the biasing resistors, Replace them with the new components, re-solder them and then check the solder connections to make sure you have not created any shorts, and this end the replacement of the parts in question. That's the process.

I hope this helps,
Thank you,

Posted on Jan 26, 2008


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