Quote:
Originally Posted by Telecolor 3007
But why "Sony" used bad MCZ chips and the competion made better chassies?
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The chips were made by shindengen (sp?) and Sony just bought them as several companies like Hitachi and possibly Toshiba did (not sure about Toshiba, it's been many years now).
The Sonys that used the MCZ chips were not "bad" chassis specificaly, but most of the trouble we had with that chassis series was the MCZ chips, but there were also two 200V plus electrolytics on that board we used to change at the same time.
Since Hitachi had less trouble with those chips and since the Sony used two and only one near the flyback was really the one that generally failed, I think the circuit that the chip was installed in was somehow tougher on the MCZ than it should have been, but Sony never issued a bulletin for a circuit change that would increase the life time. In any case, it didn't affect every Sony and most of them were at least a few years old when they failed.
John