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Discussion Starter · #1 ·
I have a Toshiba 50HX81 rear projection HDTV. I turned it on tonight and the convergence was off. I went into the convergence menu and can move blue left and right but not up and down. The blue is what is off. I assume the convergence unit broke. Is this something I can replace myself? Anyone have instructions? (The red convergence works in all directions).


Thanks,

Rick
 

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Discussion Starter · #2 ·
I talked to a service center this morning. It looks like it is an amplifier for the convergence unit rather than the unit itself. It will cost about $300 to fix (incl. parts and labor). Not what I wanted before Xmas, but could have been worse....


Rick
 

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Your description certainly does sound like convergence ICs, which is a very common failure in CRT rear projection TVs. There are 2 of these ICs, and you probably won't be too happy to hear that they sell for a whopping $10 each! So that's $20 parts, and $280 labour!


Some very intreped enthusiasts have sucessfully replaced these chips on their own, but I really can't advise this unless you have at least a reasonable amount of electronics/soldering experience under your belt.
 

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Discussion Starter · #4 ·
I have the soldering skills to do the job if someone can tell me the part number where it is on the board..... I would GREATLY appreciate the info!


Thanks,

Rick
 

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They are pretty hard to miss. Most are about 3 inches long and mounted to a large heatsink. Typical part numbers are STKxxx-yyy and prices can vary from the forementioned $10 up to $65. De-soldering and disassembly skills are often more important than soldering ability on these TV's. If you replace one, then replace both. There could be circuit protectors or current limiting resistors that sometimes fail.


This is indeed a profitable repair for servicers but not really excessive. Sometimes hidden problems can be very time consuming.
 
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