Scucci
Well-known member
From what I've been able to dig around and find out... it looks like the NTSC decoder for the 4900 requires +15VDC and a GND... I've been told they have to be from the same source as the monitor chassis... ... read as "powered from the monitor chassis".
How?
I tacked in 12VDC and I ended up with a psychedelic Dragon's Lair screen when red and blue flashing like you would see if a damned Jefferson Airplane video. I adjusted everything on the NTSC card and nothing really improved it. I can only assume it was a power issue... no idea.
Either way, I don't really plan on having a switching supply in the cabinet just to feed +15VDC. So... what's the deal? Where does the NTSC card get it powa' from?
... and what's the deal with the damned trip down the rabbit hole?
How?
I tacked in 12VDC and I ended up with a psychedelic Dragon's Lair screen when red and blue flashing like you would see if a damned Jefferson Airplane video. I adjusted everything on the NTSC card and nothing really improved it. I can only assume it was a power issue... no idea.
Either way, I don't really plan on having a switching supply in the cabinet just to feed +15VDC. So... what's the deal? Where does the NTSC card get it powa' from?
... and what's the deal with the damned trip down the rabbit hole?