Subject: Mitsubishi WS55859 HDTV
From: "Leonard Caillouet"
Date: 11/16/04 8:03 AM Eastern Standard Time
Message-id: eXmmd.7792$Dk.2102@lakeread08



If all three tubes are burned completely and the convergence is good, you
would get EXACTLY a black spot.

The marks that the OP are describing come from circuit failure, unless he was
watching that pattern (as Sam suggests is unlikely to say the least). While
those type of marks would burn on the same physical area of the CRTs, the
actual picture targets are not in the same location on the tubes. The green is
pretty much dead center while the red and blue images are off center in
opposite directions. For an experiment, disconnect the yokes on an old
scrapper projo (jump out any B+ feeds at sockets) and burn three marks in the
dead center of each tube. You'll find three colored marks on the screen.

The only time I've ever seen black marks is when the burns are large and
overlap at some point.