Re: A few WG6100 tips and tricks

That is what you get when deflection is fully on to one side (the beam hits
somehwere outside the visible area).

Can you check the voltages on the X and Y outputs of the deflection
amplifiers?

Mendel

----- Original Message -----
From: "Brian Deuel" <briandeuel@atarivector.com>
To: <vectorlist@vectorlist.org>
Sent: Tuesday, April 13, 2004 4:01 AM
Subject: Re: VECTOR: A few WG6100 tips and tricks

>
> Oops. I also should have mentioned that the HV comes up fine and the
heater glows.
>
> Brian
>
> >Thanks for the tips. I happen to be juggling three repairs right now.
> >Here's a weird one for you:
> >
> >Installed both of Bob's kits (caps, transistors, extra parts) and the
> >LV2000. Turn game on, fires up, hear deflection chatter, but the spot
> >killer is on. All voltages are good. When I turn up the brightness, I get
> >a bright "rainbow" pattern on the lower half of the screen. Not vectors,
> >mind you. Just a bright horizontal rainbow effect.
> >
> >I've gone threw the FAQ and checked everything listed there. I've gone
> >over the deflection board for bad solder joints, checked and
> >quadruple-checked the chassis transistors for any kind of shorting (mind
> >you, I didn't check their output voltage), and checked all of the
> >connector/transistor socket connections for continuity.
> >
> >Any suggestions as to what I should next? Thanks for any help offered.
> >
> >Brian
> >http://www.orubin.com
> >
> >*********** REPLY SEPARATOR ***********
> >
> >On 4/12/2004 at 6:34 PM Joe wrote:
> >
> >>Just got done fixing several 6100's this week... and here's a few tips
> >>for everyone.
> >>
> >>1. Don't use NTE 10 watt 1.5 ohm resistors. You need audio grade or non
> >>inductive ones. One of these was on a board I got in and it was making
> >>wavy lines on the bottom half of the screen after all else was repaired.
> >>
> >>2. Replace ZD902 with 2 75v 1 watt zener diodes end to end. (Positive of
> >>one to negative of the other.) This will make a teepee sticking out of
> >>your board... But, guess what, NTE 150v one watt zener is several
dollars.
> >>My fix will cost you under $.25 and last forever. The NTE part WILL
fail.
> >>This fix was told to me by Rick Schieve. I can't take the credit.
> >>
> >>3. Use MPSU57 and MPSU07's in place of the MPSA56 and MPSA06
> >>(respectively) in the LV section. I HIGHLY recommend using the CEN-U07
and
> >>CEN-U57 parts. They hold up just excellent - much better than the
uniwatt
> >>packages! If you do this, again, the LV section will be bullet proof.
This
> >>fix will cost you just a few $$$. The other upside of this is that when
a
> >>deflection transistor fails and begins to draw too much current through
> >>the LV section, it will only blow the 15 ohm resistor. If you have an
LV2k
> >>in there, I hope you have surface mount soldering equipment. If you
order
> >>the transistors from me, I will throw in some free 15 ohm resistors, if
> >>you ask.
> >>
> >>4. Run your game a little bit smaller than full screen. By doing this,
the
> >>deflection transistors won't need to work as hard. This means less heat
> >>and longer life.
> >>
> >>If you have anything to add, please do.
> >>
> >>JB
> >>
> >>
> >>---
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> >>
> >>
>
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> >chris@westnet.com
> >
> >
>
> "We're all a bunch of spoiled brats, if you get right down to it. You just
want to buy the meat in the store, you don't want to see Bambi getting cut
up [laughs]. You want to protest fur walking around in your leather shoes.
You want to talk the environment as you drive around in your Hummer 2. We're
a study in contradictions, I think. The ultimate spoiled brats of the
world."- Uncle Eugene Jarvis, the creator of Defender, Stargate, and
Robotron
>
>
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Received on Tue Apr 13 02:50:54 2004