Re: Amplifone DEFLECTION QUESTION

A scope would definitely tell you if the vector board is sending good signal
to the deflection circuit in the monitor.
Anyone else have any good simple suggestions to make sure the vector
generator board is sending signal ok?

I'm still leaning toward the output transistors. Are you positive they are
good? Make sure that you have infinite resistance between the transistors
and the chassis -- disconnect the jumpers from the board and do a diode
check to check the transistor, and also a continuity check between the
transistor case and the chassis. It should read open.

Also - what is the low voltage reading?

chris starr

----- Original Message -----
From: "Daniel Piraino" <dpiraino@twcny.rr.com>
To: <vectorlist@synthcom.com>
Sent: Friday, October 05, 2001 2:41 AM
Subject: Re: VECTOR: Amplifone DEFLECTION QUESTION

> I never had this problem before until I blew some power transistors. I
dont
> believe its the yoke it worked fine before all that. I dont have access to
a
> scope so cant check with that.
> Dan Piraino
>
> Chris Starr wrote:
>
> > A yoke problem perhaps? But that's worst case.
> > What does the signal look like for the video board on an oscilloscope?
> >
> > sorry - an oscilloscope that does x/y input.
> >
> > ----- Original Message -----
> > From: "Daniel Piraino" <dpiraino@twcny.rr.com>
> > To: <vectorlist@synthcom.com>
> > Sent: Friday, October 05, 2001 12:22 AM
> > Subject: VECTOR: Amplifone DEFLECTION QUESTION
> >
> > >
> > > I have been working on an Amplifone board that I have gotten to the
point
> > of running
> > > without blowing transistors. I found the culprit and fixed it but
there is
> > a problem
> > > im not sure of. The screen is sqewd. To explain what it looks like it
> > would be like
> > > if you took the top left corner of the screen and pulled it to the
middle
> > of the
> > > screen. Nothing is draw to the top of the screen or to the left side
of
> > the screen.
> > > Everything is being drawn to the bottom right of the screen. I was
> > wondering if it
> > > could be a capacitor that went bad. I havent checked them yet but I
will.
> > If you
> > > understand what Im saying and have an idea let me know.
> > > Thanks,
> > > Dan Piraino
> > >
> >
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Received on Thu Oct 4 22:06:22 2001