Re: Space Duel amplifone?

Problem solved... replaced mc1495 at A12 and all is well.. thanks!

--- On Sat, 7/24/10, Maxstang <maxstang@sbcglobal.net> wrote:

> From: Maxstang <maxstang@sbcglobal.net>
> Subject: Re: VECTOR: Space Duel amplifone?
> To: "vectorlist@vectorlist.org" <vectorlist@vectorlist.org>
> Received: Saturday, July 24, 2010, 8:53 PM
> Yep!  The second set of MC1495s
> on Space Duel and Gravitar are for picussion correction.
> Your SD board probably has one or more dead 1495s.
>
> Sent from my iPhone
>
> On Jul 24, 2010, at 3:47 PM, andre <livnfree_can@yahoo.com>
> wrote:
>
> Or perhaps I am looking at this the wrong way.. I read a
> post on disabling the pincushion corrector for a Tempest
> pcb.. so I would assume then that maybe I am looking at this
> in reverse in thinking that there was a corrector circuit
> when you went from a 6100 to an amplifone when perhaps these
> all had them built into the circuit (SD/Grav/BlackWidow)
> because the 6100 bowed images?
> If so could the issue be some part of the circuit then is
> not functioning on this SD pcb? If that is possible, what
> exactly is the circuit on a SD pcb?
>
> --- On Sat, 7/24/10, andre <livnfree_can@yahoo.com>
> wrote:
>
> From: andre <livnfree_can@yahoo.com>
> Subject: VECTOR: Space Duel amplifone?
> To: vectorlist@vectorlist.org
> Received: Saturday, July 24, 2010, 6:19 PM
> I have a bunch of Space Duel pcb's I
> am looking at getting fixed so was going through them. I
> have one working fine in a cabinet, and also had a second
> one working so was going to sell it off to someone who
> needed one. I decided to let it run a while in the cab I
> have. I noticed when playing, and test mode, that the
> sides
> are very bowed in when you have the square box up (test or
> bonus round). I know I posted a while back I thought this
> might have been for an amplifone machine, but that was a
> while ago and searching don't really find any answers.
> I have a Gravitar as well with a factory amplifone setup
> in
> it so I put the Space Duel into that cab.. straight as an
> arrow on the sides (and man do vectors look better than
> the
> 6100..).
>
> So I am wondering if anyone heard of there being a SPace
> Duel cab that came with a factory amplifone setup like
> this
> Gravitar? The Gravitar pcb was not modified for the amp,
> so
> wondering if Atari did do this combo for SD, if they
> modified the pcb?
> I looked at the 5 other pcb's I have and all have the
> AM6012 dacs in A/B9 and D9. This one however has MC3410
> dacs
> in C9 and E9. I see in the schematics this is listed as an
> alternate circuit, but doesn't say anything about it
> working
> differently or being for a different setup.. The other
> thing
> I can see different is there is a resistor, looks like
> 400ohm (have not metered it) and is on the LF13201N at E10
> in the output section, from pin 3 to pin 15. Other than
> that
> all else looks fine..
>
> Anyone know if that resistor is bowing the sides, or if
> there was a factory modified SD amplifone pcb?
>
>
>
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>
>
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Received on Sat Jul 24 21:21:59 2010