Following this theme, I'm hooking up my DOT Environmental to a switcher. I have
virtually all the power inputs to the game figured out, except for the following.
On the power supply board, Connector 4 pin 14 is labeled as AC Synch. It connects
to the flashing fluorescent control board and is fed directly to chip 1B (a
74123).
Does this line need to be connected to anything?
tm
Bryan Kruzynski wrote:
> > > My Galaga has a switching power supply. It's missing the power supply
> > > board, but the original transformers are there. There's no sound, and
> > > I've found the 12VDC is not connected. The switching power supply has a
> > > 12VDC at 2.5A output. The schematic shows that +V.IND needs to be
> > > approximately 10V RMS at 3.5A and +V.AUDIO needs to be approximately 13V
> > > at 1.5A.
> > >
> >
> > 10 Vrms is about 14.1421356 volts peak, so 12 volts shouldn't hurt. Connect
> > both to the +12 switcher output.
>
> Roger, thanks. Connecting +V.Audio (orange) to 12VDC was all it needed.
>
> Bryan
>
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Received on Sat Oct 21 17:03:25 2000
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