I've found another problem with that DTV306 I repaired last week.
When sending it a 1080i signal through the component input it has
trouble coming into horizontal sync. It had about 4 diagonal lines
across the screen and will often fall into sync after a few minutes.
It looks like the horizontal frequency is a little off, but there's no
adjustment in the service menu. Could I adjust this with the chipper
check? This seems to be a fairly common problem with this chassis,
but I haven't been able to find an answer. Can anyone help?

I've tried 2 HDTV sources and they both make it behave the same way.
480p is fine.
Andy Cuffe

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