Re: TECH: Star Wars 'tearing'

I have a bad yoke in my Star Wars that displays a very similar picture when
tweaked slightly left or right.

Do you have another amplifone deflection board to toss into the cab? Or
another cab you can check the yoke in?

"Matty-t" <matthews@xxxxxxxxxxxxxxxxx> wrote in message
news:1142733329.700352.18130@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Andrew,

Before you go and spend your money I want to mention (as it seems to
happen quite frequently around here *hint*) Thats the other guys
helping here seem to have missed your comment about

"Keep in mind the picture would display perfect on the osciliscope (if
that
helps.)"

Now unless I interpreted that wrong you have hooked a scope up in X/Y
mode to the X and Y outputs of the PCB and the picture is fine?

If that is the case you have tapped a signal from the FINAL output of
the PCB set. Thus everything on the PCB is probably OK.

FYI the bottom board on the three board stack is the VG board. It
should have EIGHT pots near the corner of the PCB. Sometimes the
silkscreen is worn down and therefor they appear unlabled. These are
your adjustment pots for LIN, BIP, SIZE, and CENTER for X and Y
channels respectivly.

General FYI to others - I have caught myself in the past interjecting
offering help while *missing* some key piece of information. It has
been noted and I continue to try and retain all bits before I post a
reply. Because you are truely trying to help the best place to start is
by having retained all stated bits of information before you make your
own analysis and possibly send someone off on a wild goose chase. It
could get pricey.

Thats my take on your problem. If you X/Y'd a scope on the outputs and
it looks right, you are looking at a probable slewing issue or current
issue in the final deflection amplifier or yoke. There is an off chance
there is a signal issue the scopes high impeadence inputs won't pickup
that is causing a problem with driving the signal cleanly downstream to
the monitor. However I would still put 90% blame on the monitor.

- Matt



.

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