On Tue, 6 Apr 2010 15:32:43 -0700 (PDT), whit3rd
wrote:

On Apr 6, 12:30*pm, mm wrote:
Question 1: On a tv screen, what is the opposite of pin-cushioning
called?

Barrel distortion. For the obvious reason...
There may be a 'pin amp' or 'pincushion' marked control that you can
tweak (but this would be a remove-the-case-back kind of job).

Thanks. I'll look if I ever take the back off this one.

Question 2: I have a 12 inch Sony color tv, with turret tuning and a
separate UHF turret tuner, with detents. *I guess it's about 25 years
old.

I've been using it for about 2 months and, mayb surprisingly, the
opposite of pin-cushioning (OPC) doesn't bother me. I only notice it
rarely, when there are some vertical lines near the edges of the
screen, or at the end of a movie when the credits crawl by.

A couple days ago, within a day or less, two vertical lines appeared,
about 1.5 inches from the left edge, about a quarter inch from each
other, each about 2 or 3 mm. wide, the right one from the top of the
screen to the bottom, the left one from the top of the screen 9/10ths
of the way to the bottom, sometimes only to 2/3rds. *The lines flare
out at the top and bottom, I presume because of OPC.

That's usually where 'ghosting' shows up; there's a strong timing
signal
on analog TV just to the left of the picture, and if you have a
delayed ghost
of the timing signal, there will be a (usually dark) bar in that
position.
Ghosting has this symptom ONLY on analog transmissions, though.
Is your set on analog cable?

Well, no it's not on analog cable but it's on analog output from the
DVDR with OTA reception. Is one different from the other?

A second possibility is that the 'screen' adjustment is out of whack
(this usually lowers the contrast on the full display); if you have a
gray-bars test pattern (some DVDs come with such on 'em) it will fail

No my Philips DVDR with harddrive has a lot of good features, but it's
missing a lot of features also.

I do have a dot generator in the basement, but i'll never get around
to this. Like I said, I just wanted to know how it could happen.

Thanks

to have a good 'black' until the screen is readjusted. Screen
readjust
is very commonly required with age, and either an insulated
screwdriver
into the marked hole, or a remove-the-back-and-tweak adjustment is
likely to be available.

I don't have much expectation of fixing this, but I would like to know
what it is, how it can happen.