Re: Loss of Horizontal Sync G07

Try my jumper trick first, then check the two Horizontal Sync transistors
on the inputs - they do get zapped!

John :-#)#

At 02:24 PM 07/08/2003 -0500, SteveT wrote:

>It's a horizontal monitor. I subbed in a different g07 chassis to make
>sure the
>sync level was ok from the game board. The other g07 chassis sync's up to the
>game with no problem.
>Steve
>
>John Robertson wrote:
>
> > Are you sure that it is the horizontal direction? Remember that monitors
> > are laid out like TVs and the horizontal axis is ALWAYS the long length of
> > the tube. So if you game is a vertical one (Pacman, 1942, etc.) then you
> > are talking about the VERTICAL hold.
> >
> > Sometimes a simple cure is to jumper the Positive sync pins (unused pins 5
> > & 6 on video input connector) this can bypass a bad Vertical (or
> > Horizontal) input transistor. Fixes about 50% of monitors without having to
> > work on the board (street repairs!)
> >
> > John :-#)#
> >
> > At 10:57 AM 07/08/2003 -0500, SteveT wrote:
> >
> > >I have a G07 with no horizontal sync. It locks vertically but rolls in
> > >the horizontal direction. Anyone seen this? I replaced both horiz sync
> > >drive transistors and subbed in a new IC . No change.
> > >
> > >Steve
> > >
> > >
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Received on Thu Aug 7 15:28:43 2003