Quote:
Originally Posted by old_coot88
The luma signal (i.e., the black & white or 'video') component is absent. Only the chroma signal is being displayed.
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He is right ! check the schematic, follow where the video amp is and look
anywhere along the line, don't get stuck on some single part just cause you
know it's name, troubleshoot it along the way.... Contrast control, tube, check
tubes & tube voltages, lose parts, tube sockets, hit stuff and boards with a
nude stick see if it's intermittent, etc. etc....
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