Re: Cinematronics/Vectorbeam Monitor repair mini-doc!

----- Original Message -----
From: "Mark Jenison" <jenison@enteract.com>
To: <vectorlist@synthcom.com>
Sent: Friday, July 05, 2002 6:11 PM
Subject: Re: VECTOR: Cinematronics/Vectorbeam Monitor repair mini-doc!

> >
> > Now if you are still blowing breakers, remove the connectors for the
> "HORIZ"
> > and "VERT" heat-sunk transistors, and retest for no more than 15 seconds
> or
> > so.
>
> I assume at this step, you have the deflection coil unplugged, because you
> aren't supposed to test with the deflection transistors unplugged and the
> coil plugged in. I tried this and my deflection board toasted
immediately.

Immediately is likely a bit of an exaggeration. Generally speaking, the
resistors
will begin to cook before a picture comes onto the screen (i.e. don't bother
looking for a picture unless you've upgraded to 5W or intend to replace
them)
but that still is in the tens of seconds. I suppose the suggestion is a
good one
(although I personally have NEVER done so and have also never had a problem
burning those guys up) except that Vectorbeam's do not have a connectorized
yoke!

> I would not recommend this step at all in fact; I would simply recommend a
> mandatory upgrade to the 2N3716 and 2N3792 transistors.

Well.... OK, you're probably right on this one.

> > If one is bad upgrade to 2N3716/2N3792 as found in the Atari model's
> > vector monitors. These are beefier parts for the same purpose. Don't
ask
> > me which substitutes for which; figure it out (that's what I do EVERY
time
> > :)!
>
> A good way to remember which substitutes for which; take the last number
of
> the original transistors and multiply by two: The one that ends with '8'
is
> replaced by the 2N3716 ('16'), and the one that ends with '6' is replaced
by
> the 2N3792 ('12'...ends with '2' :-)).

Good tip! You don't know what those white things are on the yoke wires,
do you?

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Received on Sat Jul 6 18:50:36 2002