External 3B1 Monitor Project Status; and help needed
Bill Mayhew
wtm at uhura.neoucom.EDU
Mon May 6 01:39:12 AEST 1991
Horizontal width is virtually always controlled by an inductor, not
a pot. Check in the vicinity of the flyback transformer. There
should be a cardboard tube about 10mm in diamter and 30-40 mm in
length with a large bolus of litz wire near the top. The width is
controlled by moving a powdered iron slug up and down inside the
tube (hence changing the reluctance of the coil). Adjustment is
accomplished via a plastic hex wrench.
The coil should have a profile something like this:
_
__| |__
| | <- coil
| |
--| |--
| | <- cardboard tube
| |
_|_|_ <- circuit board
As far as delaying the video. Hmmm. I don't know. Perhaps the
width adjustment will take care of that?..
Bill
--
Bill Mayhew NEOUCOM Computer Services Department
Rootstown, OH 44272-9995 USA phone: 216-325-2511
wtm at uhura.neoucom.edu ....!uunet!aablue!neoucom!wtm
via internet: (140.220.001.001)
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