Quote:
Originally Posted by MRX37
Well let me answer that question with a question: Is this chroma smearing a legitimate issue or is it just a limitation of the chassis design?
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No, the 166 was a fine performer with no known vices. Also, incredibly reliable.
I remember having a problem like that with the jungle chip in several brands (I think Toshiba and Sanyo made most of the jungle ICs for the industry). If it uses the same one as the 169, I might have one. I scrapped out most of my analog chassis some years ago, but I have friends who might have an original jungle if you post the number.
As far as the cap off the flyback, if that was giving you problems, you'd see a brightness shift from one side of the screen towards the other. Put the picture to zero and lower the brightness in a dark room. If the picture is evenly lit, the cap for the kine source is prob good. The easiest and best way is to scope the 200V right at the CRT socket.
If the smear is on just one color, it could even be a problem at the CRT socket board. A cranky kine drive transistor could do this or a shorted inductor on that one color. The inductor will read fine resistance-wise but a shorted turn will cause a smear.
EDIT: if it affects one color, you can swap the red/gree/blue signal input leads to the CRT socket and see what happens. The color will be all wrong but we're interested in the smear. If the color smear doesn't change, the problem is on the CRT socket board or CRT. If the smear shifts color, it's on the main chassis - perhaps the jungle IC or one of the buffer transistors between the jungle and CRT socket board.
John