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b b is offline
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Default TV vertical/frame problem

I'm trying to fix this European ELBE E12D chassis tv. The inital
problem was this:

http://www.fileden.com/files/2007/6/...3/DSCF8209.JPG
http://www.fileden.com/files/2007/6/...3/DSCF8210.JPG

As you can see, there is a venetian blind effect, and considerable
foldover. The voltages around the IC seemed normal. It looked like a
pumpup cap failure, but a change of several caps didn't alter
anything, so I got a new TDA 8178S frame chip. that produced only the
usual horizontal line. A TDA 8170 (which was in the schematic for the
set) also did the same. Re fitting the original brings back the
initial fault.

Is this likely to be a case of requiring the original TDA8178 part or
could there be somethign else I should pursue?
-B