tech: Gorf sync voltage

[RobWalmsley]

[ukvac] tech: Gorf sync voltage

Hi

The gorf RGB interface pcb outputs the sync signal at
12volts rather than 5v.

I want to use a gorf set in my jamma cabinet, but I am
a bit worried about putting 12v when the monitor is
expecting 5v.

Does anyone know how to reduce this voltage?. Can I
just put a resistor in-line?

Or will my Hantarex monitor be able to cope with 12v?

Cheers

Rob

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[guddler]

Re: [ukvac] tech: Gorf sync voltage

I'm nowhere near a Gorf manual right now so i'll take your word for it, but:

1. Are you sure that it outputs a 12v sync?
2. Are you sure your RGB board isn't up the creek?

I'm only wandering since my Gorf has either an Electrohome or WG monitor in it
(can't remember which, WG i think), but whichever it is, it's no different to
what a standard jamma monitor, so i really can't beleive that the sync
_SHOULD_ be up that high

Martin.

On Monday 11 April 2005 00:52, Rob Walmsley wrote:
> Hi
>
> The gorf RGB interface pcb outputs the sync signal at
> 12volts rather than 5v.
>
> I want to use a gorf set in my jamma cabinet, but I am
> a bit worried about putting 12v when the monitor is
> expecting 5v.
>
> Does anyone know how to reduce this voltage?. Can I
> just put a resistor in-line?
>
> Or will my Hantarex monitor be able to cope with 12v?
>
> Cheers
>
> Rob
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
>
>
>
>

 

[netdent]

Re: [ukvac] tech: Gorf sync voltage

I would agree Martin, mine had a standard Electrohome monitor in so it must be a standard signal to the monitor.


Ronnie

Martin White <martin@guddler.co.uk> wrote:
I'm nowhere near a Gorf manual right now so i'll take your word for it, but:

1. Are you sure that it outputs a 12v sync?
2. Are you sure your RGB board isn't up the creek?

I'm only wandering since my Gorf has either an Electrohome or WG monitor in it
(can't remember which, WG i think), but whichever it is, it's no different to
what a standard jamma monitor, so i really can't beleive that the sync
_SHOULD_ be up that high

Martin.

On Monday 11 April 2005 00:52, Rob Walmsley wrote:
> Hi
>
> The gorf RGB interface pcb outputs the sync signal at
> 12volts rather than 5v.
>
> I want to use a gorf set in my jamma cabinet, but I am
> a bit worried about putting 12v when the monitor is
> expecting 5v.
>
> Does anyone know how to reduce this voltage?. Can I
> just put a resistor in-line?
>
> Or will my Hantarex monitor be able to cope with 12v?
>
> Cheers
>
> Rob
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
>
>
>
>

 

[RobWalmsley]

Re: [ukvac] tech: Gorf sync voltage

Hi

I was pre-warned by Chad that the sync was 12v not 5v
as it had 'chewed' two monitors in his cabinet.

I measured the voltage before wiring up to sync and it
does indeed read 11.2v approx.

I have two RGB interface boards and the sync is the
same on both boards.

So I'm pretty sure that its gorf and not me!.

Rob

--- Ronnie Dent <netdent@yahoo.com> wrote:
> I would agree Martin, mine had a standard
> Electrohome monitor in so it must be a standard
> signal to the monitor.
>
>
> Ronnie
>
> Martin White <martin@guddler.co.uk> wrote:
> I'm nowhere near a Gorf manual right now so i'll
> take your word for it, but:
>
> 1. Are you sure that it outputs a 12v sync?
> 2. Are you sure your RGB board isn't up the creek?
>
> I'm only wandering since my Gorf has either an
> Electrohome or WG monitor in it
> (can't remember which, WG i think), but whichever it
> is, it's no different to
> what a standard jamma monitor, so i really can't
> beleive that the sync
> _SHOULD_ be up that high
>
> Martin.
>
> On Monday 11 April 2005 00:52, Rob Walmsley wrote:
> > Hi
> >
> > The gorf RGB interface pcb outputs the sync signal
> at
> > 12volts rather than 5v.
> >
> > I want to use a gorf set in my jamma cabinet, but
> I am
> > a bit worried about putting 12v when the monitor
> is
> > expecting 5v.
> >
> > Does anyone know how to reduce this voltage?. Can
> I
> > just put a resistor in-line?
> >
> > Or will my Hantarex monitor be able to cope with
> 12v?
> >
> > Cheers
> >
> > Rob
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Small Business - Try our new resources
> site!
> > http://smallbusiness.yahoo.com/resources/
> >
> >
> >
> >

 

[netdent]

Re: [ukvac] tech: Gorf sync voltage

Hi Rob,

well if thats the case the monitor must be able to handle the sync voltage, I rebuilt a Gorf including fully rewiring it from the manual. i also changed the monitor as the one in it was done i fitted the same type electrohome but it was removed from a galaxian clone machine and it worked ok.


hope this helps, or maybe it will confuse more.


Ronnie

Rob Walmsley <RobWalmsley@yahoo.com> wrote:
Hi

I was pre-warned by Chad that the sync was 12v not 5v
as it had 'chewed' two monitors in his cabinet.

I measured the voltage before wiring up to sync and it
does indeed read 11.2v approx.

I have two RGB interface boards and the sync is the
same on both boards.

So I'm pretty sure that its gorf and not me!.

Rob

--- Ronnie Dent <netdent@yahoo.com> wrote:
> I would agree Martin, mine had a standard
> Electrohome monitor in so it must be a standard
> signal to the monitor.
>
>
> Ronnie
>
> Martin White <martin@guddler.co.uk> wrote:
> I'm nowhere near a Gorf manual right now so i'll
> take your word for it, but:
>
> 1. Are you sure that it outputs a 12v sync?
> 2. Are you sure your RGB board isn't up the creek?
>
> I'm only wandering since my Gorf has either an
> Electrohome or WG monitor in it
> (can't remember which, WG i think), but whichever it
> is, it's no different to
> what a standard jamma monitor, so i really can't
> beleive that the sync
> _SHOULD_ be up that high
>
> Martin.
>
> On Monday 11 April 2005 00:52, Rob Walmsley wrote:
> > Hi
> >
> > The gorf RGB interface pcb outputs the sync signal
> at
> > 12volts rather than 5v.
> >
> > I want to use a gorf set in my jamma cabinet, but
> I am
> > a bit worried about putting 12v when the monitor
> is
> > expecting 5v.
> >
> > Does anyone know how to reduce this voltage?. Can
> I
> > just put a resistor in-line?
> >
> > Or will my Hantarex monitor be able to cope with
> 12v?
> >
> > Cheers
> >
> > Rob
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Small Business - Try our new resources
> site!
> > http://smallbusiness.yahoo.com/resources/
> >
> >
> >
> >