RE: 6100 LV issues

This is in the area of Preventative Maintenance, and is likely to prevent
more expensive failures down the road.

Recommended.

Please check your ground/common connections as well...

John :-#)#

At 10:07 AM 08/02/2002 -0800, LOUIS SRIANOMAI wrote:
>Okay,
>
>So the question is, should I wait for my original LV section to fail or should
>I go ahead and retrofit the LV2000 even though things are running fine now.
>The old addage, "if it ain't broke, don't fix it".
>
>Or could a failing original LV section take other things out?
>
>L.
>
>--- John Robertson <jrr@flippers.com> wrote:
> > Agreed..., going by the logic of keeping things "original" then if the
> > manufacturer recommended any modifications, or if upgrades (factory or
> > otherwise) were performed after the item was produced, do we then reverse
> > the unit back to the condition it came from the factory? Hmmmm. I don't
> > think so!
> >
> > We have been recommending a minor wiring upgrade for a brand of pinball
> > that gave nothing but trouble and with the simple jumper wire 90% of the
> > problems go away...Same with SEGA Vector games, fixing the ground
> > connection problems will protect the GO-8 monitor, as will that same
> ground
> > upgrade cover the Atari Vector monitor failures in many cases.
> >
> > The problem is if the common (ground) connection deteriorates between the
> > power supply, game board and monitor you can get different ground
> reference
> > voltages that will offset the bias on the output transistors, causing them
> > to heat up and burn out. Make VERY sure that the common leads are solidly
> > connected to avoid this problem.
> >
> > On Atari games make certain the green common wires are bolted to the
> > monitor, board and power supply common tie points, and the nuts are TIGHT!
> >
> > Sega games require a separate ground wire from the power supply (solder it
> > on to the common trace right at the main filter caps), and run it to the
> > monitor and logic board and either bolt or solder it to these.
> >
> > Factory equipment is NEVER perfect, there are many instances of
> technicians
> > catching design errors and it is up to us to incorporate them in or risk
> > the peril of the game dying...
> >
> > John :-#)#
> >
> > At 06:51 AM 08/02/2002 -0800, Rosenzweig, Joel B wrote:
> > >I'm a little confused by the argument. If the claim is: "I want to
> keep my
> > >monitor original, as designed. Therefore I don't want to put in the
> LV2000
> > >board" then you cannot replace Q100/101 or it's related circuitry with any
> > >upgrade component or subsystem modification. Which means that all you
> have
> > >allowed yourself to do is to replace any part that fails with the same
> type
> > >part. If you open yourself to "modifying the board for better
> performance"
> > >then there is no intrinsic difference between cutting a trace and/or using
> > >beefier transistors than there is to making a daughter card that plugs
> in to
> > >the deflection board that simply replaces a few components and similarly
> > >provides increased longevity.
> > >
> > >I think the reality is that the design of the low voltage power supply for
> > >the WG6100, the HV transformer on the Amplifone, and _fires_ from
> G08's were
> > >the root cause of vector monitors having such a bad reputation in the
> > >amusement community. These items required constant attention relative to
> > >their raster monitor brothers. Keeping them in their original state is
> > >certainly not impossible - just time consuming. You can certainly
> continue
> > >to replace the failed components with the originals if that is your goal.
> > >Some people enjoy the maintenance, but enjoy playing the games even more.
> > >Somewhere you will find that balance that describes your interest in the
> > >hobby, and that will help you decide what to do. If you'll look
> forward to
> > >the next time you power up your Tempest and have a dead screen (and be
> happy
> > >about it because of the repair job you now have) then going with original
> > >parts is great. If you have that sinking feeling in your stomach
> every time
> > >you power it up wondering "will this be the big one?" :-) then you
> probably
> > >want to go with upgrading the parts. I'm not making a value judgement
> here
> > >- I love the repair work. It gives me a good reason to have all sorts of
> > >cool parts and diagnostic electronic equipment in my workshop. Maybe it
> > >even gives meaning to my existence! But - I'm not looking for doing the
> > >_same_ repairs over and over again, so I opt for the upgrade. I just wish
> > >there was a cure all for my Black Knight pinball, then my machines
> would all
> > >work in harmony. (There is some law that at least one machine must be
> hosed
> > >at any time. It's usually BK) I've found that by fixing the monitors with
> > >excellent components the first time keeps them running and minimizes
> repeat
> > >repair efforts. That let's me _play_ Star Wars for 5 minutes in an
> > >otherwise busy day. :-)
> > >
> > >Good luck figuring out what you'd like to do.
> > >
> > >Regards,
> > >Joel-
> > >
> > > > >
> > > > > Again, I'm interested to see what everyone has to say about the
> > >recurring
> > > > > Q100/101 faulure in a 6100.
> > > > >
> > > > > Thanks
> > > > > -Brian
> > >-----------------------------------------------------------------------
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Received on Fri Feb 8 11:16:59 2002