View Single Post
  #3   Report Post  
Posted to sci.electronics.repair
J. B. Wood J. B. Wood is offline
external usenet poster
 
Posts: 12
Default Zenith Sentry TV/Monitor

In article
,
whit3rd wrote:

On Mar 7, 4:18=A0pm, "J.B. Wood" wrote:
Hello, all. =A0I have a circa 1991 Zenith Sentry 2 TV model SJ206585 that
still has a great picture but there are diagonal lines (not retrace
lines)

Those are horizontal retrace lines occurring during the vertical
retrace interval. If you can find the 'blanking' adjustment, tweak
it.

If there's no blanking adjustment, it's time to tweak the high
voltage
adjustment called (usually) 'screen'. It's likely that contrast
will get lots better when this is done correctly. Don't let
the shadow detail get lost, though.


Hello, and thanks for taking the time. But as I pointed out in my OP they
are definitely not retrace lines. The lines are grouped into sets of a
specific pattern and that are inclined at an angle (relative to
horizontal) much greater than that observed with retrace lines. Some
Googling on Sentry model sets indicates that a capacitor may be the
culprit reponsible for the picture artifacts. I realize it's difficult to
provide advice when one can't see the actual pattern but again, thanks.
Sincerely,

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337