Cap Kit - Could this fix a totally blurred picture?

Archived from groups: rec.games.video.arcade.collecting (More info?)

I'm working on a Spy Hunter. Got the game to come up. It plays, picture
is totally blurred and you can't see anything. I'm wondering if any of
you actually came across a totally blurred game and capped it and the
picture came back totally. I'll wind up capping this bugger but never
saw such a blurred picture.

John

Archived from groups: rec.games.video.arcade.collecting (More info?)

your flyback is dying, only way to really tell is to take a reading with
high voltage probe or use a flyback tester, or the convergence is off cause
someone messed with the rings, I just had one where a guy gave me a 13 inch
monitor out of a centipede cocktail, it was bad, real bad, made me want to
throw the whole thing out, then noticed rings were messed with. Pulled out
the go7 book and spent an hour tweaking it and looks almost like new.

Trin
"Baraka" <grus_jc@yahoo.com> wrote in message
news:1124156362.289925.41200@g49g2000cwa.googlegroups.com...
>
> I'm working on a Spy Hunter. Got the game to come up. It plays, picture
> is totally blurred and you can't see anything. I'm wondering if any of
> you actually came across a totally blurred game and capped it and the
> picture came back totally. I'll wind up capping this bugger but never
> saw such a blurred picture.
>
> John
>

Archived from groups: rec.games.video.arcade.collecting (More info?)

Spy Hunter was shipped with Wells-Gardner k4900 series monitors. You
could have one of three problems:

Bad picture tube socket on the neckboard (corroded pins inside the
socket)

Bad picture tube (internal problems that could be diagnosed and
possibly repaired on a rejuvenator)

Bad flyback (these flybacks were notorius for bad focus voltage
windings). Unfortunately, these flybacks have been N.L.A. for many
years.

If I were a betting man, I'd say your flyback has gone tits up.

Archived from groups: rec.games.video.arcade.collecting (More info?)

The flyback generates a number of voltages.... the *really* high voltage
goes to the second anode and is used to siphon off electrons from the
monitor (you have a gun in the back shooting (-) charged electrons at the
front... eventually you build up a bunch of them and they deflect the
electrons that are being aimed in the front... hence the need to draw them
off).

The flyback also generates two other high voltage's, screen (or brightness)
which is used to accelerate the electrons from the back to the front (more
voltage, brighter picture) and the focus voltage which is used to create a
magnetic lens, which in conjunction with permanent magnets confine and focus
the electron beam.

steve

"ajcrm125" <ajcrm125@gmail.com> wrote in message
news:1124191405.554080.308910@g14g2000cwa.googlegroups.com...
> Followup question.... how does the flyback effect focus? I thought
> that it's sole purpose was to generate the excessively hight voltage
> needed for the tube to display the image? Is the flyback output votage
> directly effect the focus of he image?
> -Adam
> ================
> www.onecircuit.com
> ================
>

Archived from groups: rec.games.video.arcade.collecting (More info?)

O.K...... Basically, here's what happens. I could adjust the brightness
and get the screen to go bright and pitch dark. If I adjust the focus,
it does seem to go up and down but the screen is totally blurred. Can't
make out the picture. I could faintly see it but it is way out of wack.
The screen has traditional spy hunter screen burn, but not overly bad.
I've seen a lot worse. The center of the screen appears to be a big
black square. The rest of the surrounding area looks blurred. I have a
funny feeling that the cap kit may help. I guess I'll try it and will
report back. My other question is, this is a WG4900 monitor. Is this a
special type of WG4900 or can I just put a G07 in here and call it a
day?

John

Archived from groups: rec.games.video.arcade.collecting (More info?)

sounds like you have a focus/screen short in the tube... I don't think a
cap kit would help.

just swap it out for the g07

steve

"Baraka" <grus_jc@yahoo.com> wrote in message
news:1124198780.626904.281170@o13g2000cwo.googlegroups.com...
> O.K...... Basically, here's what happens. I could adjust the brightness
> and get the screen to go bright and pitch dark. If I adjust the focus,
> it does seem to go up and down but the screen is totally blurred. Can't
> make out the picture. I could faintly see it but it is way out of wack.
> The screen has traditional spy hunter screen burn, but not overly bad.
> I've seen a lot worse. The center of the screen appears to be a big
> black square. The rest of the surrounding area looks blurred. I have a
> funny feeling that the cap kit may help. I guess I'll try it and will
> report back. My other question is, this is a WG4900 monitor. Is this a
> special type of WG4900 or can I just put a G07 in here and call it a
> day?
>
> John
>