Quote:
Originally Posted by Electronic M
They're driver chips for the scanning, HV and IIRC switch mode supplies. They tend to fail every so many years.
My DA4 chassis HD-CRT Sony has 2 of them and one blew leaving me with a dead set a few years ago...I ordered a new pair (the place sent me like 5 of them for some reason so I have spares) and somehow guessed the right one first try and fixed it with only one chip...I added a socket for that chip while I was in there so if it dies again it'll take half the time to change it.
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IIRC, the one closest to the flyback was the trouble maker, the other would last virtually forever.
One of the easy ways to troubleshoot them was to heat them with the back of a soldering and apply AC - if it started, the chip was bad. Thermal intermittents are such a time saver.
John