Re: 6100 Wavey Letters

Well, a scope is your first choice when it comes to measuring ripple. With the
scope you cannot only 'see' what kind of ripple you have (the waveform, i.e. 60
Hz ripple, switching power supply ripple, HV ripple...) but you can also see the
actual peak values. The scope gives you a far more accurate measurement IHMO.

By setting the scope to 'AC' input, you can 'amplify' the ripple on the DC by a
great deal to make it very clear on the display. By setting it to DC, if the
ripple is really bad, you can see it in direct relation the the DC level.

Mendel

Bret Pehrson wrote:
>
> You mention ripple, and I've heard it several times before. Would you mind
> detailing the method(s) that you use to measure ripple?
>
> My assumptions for measuring ripple are: use a DMM on the AC scale. The
> registered voltage is the ripple on that DC line currently being tested (?).
>
> Is a DMM the best thing to use to measure ripple (presuming 60 Hz)? I have
> a Tek scope, but I'm far from an expert on it...
>
> Thanks for any info,
>
> Bret
>
> > -----Original Message-----
> > From: owner-vectorlist@synthcom.com
> > [mailto:owner-vectorlist@synthcom.com]On Behalf Of John Robertson
> > Sent: Sunday, October 15, 2000 6:36 PM
> > To: vectorlist@synthcom.com; vectorlist@synthcom.com
> > Subject: RE: VECTOR: 6100 Wavey Letters
> >
> >
> > I assume that your +5VDC supply to the game board has a very good ground
> > connection? And the monitor is well grounded? Any ripple on the +5VDC
> > supply? How about a picture posted up somewhere for us to pick apart?
> >
> > John :-#)#
> >
> > At 03:21 AM 10/17/00, Steven Gregory wrote:
> > >On Mon, 16 Oct 2000 10:01:37 +1000, John Robertson wrote:
> > >
> > > >Have you replaced the filter caps in the HV cage? Those can
> > lead to trouble
> > > >and try and use the 105C caps, some of the 'cap kits' are not very good
> > > >with respect to special caps (low ESR or high temp) they just
> > go for the
> > > >cheapest...
> > >
> > >I totally rebuilt the cage. I swapped another deflection board and the
> > >problem
> > >went away, so its somewhere on the deflection pcb.
> > >
> > > >
> > > >We stock a number of high temp caps for vertical deflection on the
> > > >Electrohome rasters, and the HV cage on the WG XY's...
> > > >
> > > >Oh, and as we are a shop, perhaps I will charge you $0.00 for
> > the advice
> > > >;-) let's not go there...
> > > >
> > > >John :-#)#
> > > >
> > > >At 09:07 AM 10/16/00, Steven Gregory wrote:
> > > >>The cover is on the cage. The area around the high score
> > > >>has a slight wave and broken letters and the rest of the screen
> > > >>has somewhat broken letters all over. I can say the problem
> > > >>is definitely on the deflection board.
> > > >>
> > > >>
> > > >>
> > > >>On Sun, 15 Oct 2000 01:39:47 -0400, Chris Loggans wrote:
> > > >>
> > > >> >Is the cage on the HV box? Without the cage/cover there is a lot of
> > > >> >electromagnetic interference that will cause distorted letters.
> > > >> >
> > > >> >Good luck,
> > > >> >-Chris
> > > >> >
> > > >> >
> > > >> >-----Original Message-----
> > > >> >From: Steven Gregory
> > > >> >To: vectorlist@synthcom.com
> > > >> >Sent: 10/14/00 11:19 PM
> > > >> >Subject: Re: VECTOR: 6100 Wavey Letters
> > > >> >
> > > >> >My waves where much worse than shown in your pic. After
> > > >> >removing both, the problem is like what you were experiencing.
> > > >> >
> > > >> >
> > > >> >On Sat, 14 Oct 2000 22:56:25 -0400, chumblespuzz wrote:
> > > >> >
> > > >> >>Steve,
> > > >> >>
> > > >> >>As Jon Raiford stated in his reply to my original post,
> > simply removing
> > > >> >C703
> > > >> >>and C603 from the deflection board solved this problem.
> > > >> >>
> > > >> >>-roy-
> > > >> >>
> > > >> >>----- Original Message -----
> > > >> >>From: "Steven Gregory" <sgregory@arcadeshop.com>
> > > >> >>To: <vectorlist@synthcom.com>
> > > >> >>Sent: Saturday, October 14, 2000 10:31 PM
> > > >> >>Subject: Re: VECTOR: 6100 Wavey Letters
> > > >> >>
> > > >> >>
> > > >> >>> I have this same problem with a WG XY. Any help would
> > > >> >>> be appreciated.
> > > >> >>>
> > > >> >>>
> > > >> >>> On Tue, 10 Oct 2000 00:30:25 -0400, chumblespuzz wrote:
> > > >> >>>
> > > >> >>> >Hi All,
> > > >> >>> >
> > > >> >>> >Me again, still working on the Tempest.
> > > >> >>> >
> > > >> >>> >My 6100 has a strange wave to it. Check out:
> > > >> >>> >http://members.home.net/chumblespuzz/images/6100_wave1.jpg
> > > >> >>> >
> > > >> >>> >Look at the "S" in scores and the angled line on the
> > "R". See how
> > > >> >they
> > > >> >>are
> > > >> >>> >wavey? Note that the "O" and the "E" are not, as well
> > as the 0101s
> > > >> >below.
> > > >> >>> >
> > > >> >>> >Also note similar issues in the bottom image. This only
> > occurs on
> > > >> >the
> > > >> >>right
> > > >> >>> >side (bottom when horizontal).
> > > >> >>> >
> > > >> >>> >Any thoughts to why? It's not the game board as it
> > test's fine in
> > > >> >another
> > > >> >>> >machine. The monitor was just capped.
> > > >> >>> >
> > > >> >>> >Thanks!
> > > >> >>> >-roy-
> > > >> >>> >
> > > >> >>> >
> > > >> >>>
> > > >>
> > >>>----------------------------------------------------------------------
> > > >> >-----
> > > >> >>> >** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE"
> > > >> >in
> > > >> >>the
> > > >> >>> >** message body to vectorlist-request@synthcom.com.
> > Please direct
> > > >> >other
> > > >> >>> >** questions, comments, or problems to neil@synthcom.com.
> > > >> >>> >
> > > >> >>>
> > > >> >>>
> > > >> >>>
> > > >> >>>
> > > >> >>> Steven Gregory
> > > >> >>> ArcadeShop Amusements
> > > >> >>> sgregory@arcadeshop.com
> > > >> >>> http://www.arcadeshop.com
> > > >> >>>
> > > >> >>>
> > > >> >>>
> > > >>
> > >------------------------------------------------------------------------
> > > >> >--
> > > >> >>-
> > > >> >>> ** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE"
> > > >> >in
> > > >> >>the
> > > >> >>> ** message body to vectorlist-request@synthcom.com. Please direct
> > > >> >other
> > > >> >>> ** questions, comments, or problems to neil@synthcom.com.
> > > >> >>
> > > >>
> > >>-----------------------------------------------------------------------
> > > >> >----
> > > >> >>** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in
> > > >> >the
> > > >> >>** message body to vectorlist-request@synthcom.com. Please
> > direct other
> > > >> >>** questions, comments, or problems to neil@synthcom.com.
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> >Steven Gregory
> > > >> >ArcadeShop Amusements
> > > >> >sgregory@arcadeshop.com
> > > >> >http://www.arcadeshop.com
> > > >> >
> > > >> >
> > > >>
> > >------------------------------------------------------------------------
> > > >> >---
> > > >> >** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in
> > > >> >the
> > > >> >** message body to vectorlist-request@synthcom.com. Please
> > direct other
> > > >> >** questions, comments, or problems to neil@synthcom.com.
> > > >> >
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>Steven Gregory
> > > >>ArcadeShop Amusements
> > > >>sgregory@arcadeshop.com
> > > >>http://www.arcadeshop.com
> > > >>
> > > >>
> > >
> > >>----------------------------------------------------------------
> > -----------
> > > >>** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in the
> > > >>** message body to vectorlist-request@synthcom.com. Please
> > direct other
> > > >>** questions, comments, or problems to neil@synthcom.com.
> > > >
> > > >
> > > > John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> > > > Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> > > > http://www.flippers.com
> > > > "Old pinballers never die, they just flip out."
> > > >
> > >
> > >-----------------------------------------------------------------
> > ----------
> > > >** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in the
> > > >** message body to vectorlist-request@synthcom.com. Please direct other
> > > >** questions, comments, or problems to neil@synthcom.com.
> > > >
> > >
> > >
> > >
> > >
> > >Steven Gregory
> > >ArcadeShop Amusements
> > >sgregory@arcadeshop.com
> > >http://www.arcadeshop.com
> > >
> > >
> > >-----------------------------------------------------------------
> > ----------
> > >** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in the
> > >** message body to vectorlist-request@synthcom.com. Please direct other
> > >** questions, comments, or problems to neil@synthcom.com.
> >
> >
> > John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> > Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> > http://www.flippers.com
> > "Old pinballers never die, they just flip out."
> >
> > ------------------------------------------------------------------
> > ---------
> > ** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in the
> > ** message body to vectorlist-request@synthcom.com. Please direct other
> > ** questions, comments, or problems to neil@synthcom.com.
> >
>
> ---------------------------------------------------------------------------
> ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@synthcom.com. Please direct other
> ** questions, comments, or problems to neil@synthcom.com.
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Mon Oct 16 15:05:39 2000